Method and device for regulating overall negative damping of an ac-dc conversion device

Abstract

The application provides a kind of AC-DC conversion device overall negative slope adjustment method and device, it is related to the technical field of data processing, method includes: obtaining the spatial layout data of each phase insulation device in phase area, positioning point height data, midpoint height data and bow net relationship data form phase area basic state set, and construct overall height relationship chain generation negative slope distribution sequence, on this basis, through structure constraint correction and stress consistency correction, obtain the corrected negative slope distribution sequence, further establish the transition model of cross-phase area height, and form the overall negative slope target curve of phase area by overall fitting, then generate the target positioning point height correction amount and target midpoint height correction amount of each phase insulation device in reverse, to form overall adjustment parameter set, and execute coordinated adjustment control according to this, and output overall negative slope adjustment result combined with check.The application can be aimed at cross-phase area, improve the adjustment applicability of overall negative slope of AC-DC conversion device.

Description

Technical Field

[0001] This invention relates to the field of data processing technology, and specifically to a method and apparatus for adjusting the overall sag of an AC / DC converter. Background Technology

[0002] With the development of high-speed and electrified railway systems, AC / DC converters, as a key component of power supply systems, are widely used in phase-separation sections between different power supply systems to achieve a smooth transition of electrical energy. In existing technologies, the adjustment of contact wire conduction height and sag within the phase-separation section typically employs a local adjustment method based on individual phase-separation insulators. This involves manually or semi-automatically calibrating the conduction height at the positioning point and the midpoint to ensure that each phase-separation insulator meets the design requirements within its respective section. Simultaneously, in some applications, empirical curves or simple interpolation are used to transition the conduction height between adjacent phase-separation insulators to achieve basic spatial continuity. However, these methods primarily rely on single-point or single-section adjustment strategies, lacking overall modeling and unified control of the conduction height variation trend and the relationship between the pantograph and catenary operation across the entire phase-separation section.

[0003] Because the adjustment processes of each phase insulator are independent of each other and there is a lack of an overall coordination mechanism across phase zones, when high-speed trains pass through AC / DC phase zones, the conductor height distribution between adjacent phase insulators is prone to local abrupt changes or uneven transitions. This can cause transient impacts, contact instability, or even short-term disconnection risks in the pantograph-catenary system at critical current collection points. Especially under high-speed operating conditions, the pantograph-catenary dynamic response time is extremely short, and local adjustment methods cannot eliminate the cumulative effect caused by the discontinuity of conductor height in time. This affects the stability of power transmission and the quality of current collection, limiting the applicability of existing adjustment methods in complex operating scenarios. Summary of the Invention

[0004] This invention provides a method and apparatus for adjusting the overall sag of an AC / DC converter, which can improve the applicability of adjusting the overall sag of the AC / DC converter for cross-phase regions.

[0005] In a first aspect of the present invention, a method for adjusting the overall sag of an AC / DC converter is provided, the method comprising: Acquire spatial layout data, positioning point elevation data, midpoint elevation data, and pantograph-catenary relationship data for each phase insulator in the phase separation zone to form a basic state set for the phase separation zone; Based on the basic state set of the phase separation region, an overall guide height relationship chain is constructed to generate a negative sag distribution sequence; Structural constraint correction and force consistency correction are performed on the negative sag distribution sequence to form a corrected negative sag distribution sequence; Based on the modified negative sag distribution sequence, a cross-phase region conduction height transition model is constructed, and an overall fitting process is performed to form the overall negative sag target curve of the phase region. Based on the overall negative sag target curve of the phase separation region, the target positioning point guide height correction amount and target midpoint guide height correction amount corresponding to each phase insulator are generated in reverse to construct the overall adjustment parameter set. Based on the overall adjustment parameter set, coordinated adjustment control is performed on each phase insulator. Verification is performed based on the adjusted conductor height data and pantograph-catenary relationship data, and the overall negative sag adjustment result is output when the preset conditions are met.

[0006] In a second aspect of the invention, an adjustment device for the overall sag of an AC / DC converter is provided. The device is used to execute an adjustment method for the overall sag of an AC / DC converter as described in any of the above-described methods. The device includes an acquisition module, a processing module, and an output module, wherein: The acquisition module is used to acquire spatial layout data, positioning point guide height data, midpoint guide height data and pantograph-catenary relationship data corresponding to each phase insulator in the phase separation zone, forming a basic state set of the phase separation zone. The processing module is used to construct an overall guide height relationship chain based on the basic state set of the phase separation region and generate a negative sag distribution sequence; The processing module is used to perform structural constraint correction and force consistency correction on the negative sag distribution sequence to form a corrected negative sag distribution sequence; The processing module is used to construct a cross-phase region conduction height transition model based on the modified negative sag distribution sequence, and perform overall fitting processing to form the overall negative sag target curve of the phase region. The processing module is used to generate, in reverse, the target positioning point guide height correction amount and the target midpoint guide height correction amount corresponding to each phase insulator based on the overall negative sag target curve of the phase separation region, so as to construct an overall adjustment parameter set. The output module is used to perform coordinated adjustment control on each phase insulator according to the overall adjustment parameter set, perform verification based on the adjusted conductor height data and pantograph-catenary relationship data, and output the overall negative sag adjustment result when the preset conditions are met.

[0007] In a third aspect of the invention, an electronic device is provided, including a processor, a memory, a user interface, and a network interface, wherein the memory is used to store instructions, the user interface and the network interface are both used to communicate with other devices, and the processor is used to execute the instructions stored in the memory to cause the electronic device to perform the method as described in any of the preceding embodiments.

[0008] In a fourth aspect of the invention, a non-transitory computer-readable storage medium is provided, the computer-readable storage medium storing instructions that, when executed, perform the method as described in any of the preceding claims.

[0009] In summary, one or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: This invention constructs a set of basic states for phase-segment insulators under a unified line distance coordinate system, and further establishes an overall conductor height relationship chain and negative sag distribution sequence. Based on this, structural constraint correction and stress consistency correction are introduced to eliminate local structural and stress mismatch problems. Simultaneously, a cross-phase-segment conductor height transition model is constructed based on the corrected negative sag distribution sequence, and a unified negative sag target curve for the entire section is formed through overall fitting. This transforms conductor height changes from local adjustments of a single phase-segment insulator to continuous collaborative optimization across phase-segment areas. Furthermore, by generating an overall set of adjustment parameters in reverse and executing coordinated adjustment control of multiple phase-segment insulators, and combining conductor height data and pantograph-catenary relationship data for multi-dimensional verification and closed-loop correction, the adjustment results achieve unified constraints in geometric continuity, structural feasibility, and pantograph-catenary dynamic adaptability. This significantly improves the continuity, stability, and applicability of overall negative sag adjustment across phase-segment areas. Attached Figure Description

[0010] Figure 1 This is a flowchart illustrating a method for adjusting the overall sag of an AC / DC converter according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the overall negative sagging target curve of the phase splitting region disclosed in an embodiment of the present invention; Figure 3 This is a schematic diagram of a module for adjusting the overall sag of an AC / DC converter, as disclosed in an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present invention.

[0011] Explanation of reference numerals in the attached drawings: 301, acquisition module; 302, processing module; 303, output module; 401, processor; 402, communication bus; 403, user interface; 404, network interface; 405, memory. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0013] In the description of the embodiments of the present invention, words such as "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "for example" or "for instance" in the embodiments of the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of words such as "for example" or "for instance" is intended to present the relevant concepts in a specific manner.

[0014] In the description of the embodiments of the present invention, the term "multiple" means two or more. For example, multiple systems means two or more systems, and multiple screen terminals means two or more screen terminals. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0015] The negative sag adjustment of the phase-splitting zone in existing AC / DC converters is usually achieved by local adjustment based on a single phase-splitting insulator. This is done by calibrating the guide height at the positioning point and the midpoint separately and supplementing it with simple transition processing. However, due to the lack of overall coordination modeling and unified control mechanism across the phase-splitting zone, the guide height changes between adjacent phase-splitting insulators are prone to discontinuity or uneven transitions. Under high-speed operating conditions, this can further lead to pantograph-catenary impact, contact instability, and offline risks, thereby affecting the stability of power transmission and the quality of current collection.

[0016] This invention discloses a method for adjusting the overall sag of an AC / DC converter, which is applied to a server. The server includes, but is not limited to, electronic devices such as mobile phones, tablets, wearable devices, and PCs (Personal Computers), and can also be a backend server running the method for adjusting the overall sag of an AC / DC converter. The server can be implemented using a standalone server or a server cluster composed of multiple servers.

[0017] This embodiment discloses a method for adjusting the overall sag of an AC / DC converter, referring to... Figure 1 It includes the following steps: S110: Obtain spatial layout data, positioning point elevation data, midpoint elevation data, and pantograph-catenary relationship data corresponding to each phase insulator in the phase separation zone to form a basic state set of the phase separation zone.

[0018] S120, based on the basic state set of the phase separation region, constructs the overall guide height relationship chain and generates the negative sag distribution sequence.

[0019] S130, perform structural constraint correction and force consistency correction on the negative sag distribution sequence to form a corrected negative sag distribution sequence.

[0020] S140, construct a cross-phase region conduction height transition model based on the modified negative sag distribution sequence, and perform overall fitting processing to form the overall negative sag target curve of the phase region.

[0021] S150, based on the overall negative sag target curve of the phase separation region, reversely generate the target positioning point conduction height correction amount and the target midpoint conduction height correction amount corresponding to each phase insulator, so as to construct the overall adjustment parameter set.

[0022] S160 performs coordinated adjustment control on each phase insulator based on the overall adjustment parameter set, performs verification based on the adjusted conductor height data and pantograph-catenary relationship data, and outputs the overall negative sag adjustment result when the preset conditions are met.

[0023] In one possible implementation, an overall conduction height relationship chain is constructed based on the basic state set of the phase-separation region to generate a negative sag distribution sequence. Specifically, this includes: performing sequential parsing on the spatial layout data to obtain the phase-separation insulator sequence identifier and establishing a spatial sequence relationship; binding the position point conduction height data and the midpoint conduction height data according to the phase-separation insulator sequence identifier to form conduction height attribute pairs and constructing a conduction height distribution benchmark; performing difference calculation and normalization mapping on each phase-separation insulator based on the conduction height distribution benchmark to generate local negative sag characterization values ​​and form a local negative sag point set; performing neighborhood association processing and dynamic weight adjustment processing on the local negative sag point set according to the spatial sequence relationship to form a negative sag association sequence; performing spatial interpolation and smoothing processing on the negative sag association sequence to form a continuous negative sag function expression; and performing discrete sampling processing on the continuous negative sag function expression to generate a negative sag distribution sequence.

[0024] Specifically, when sequentially parsing the spatial layout data, the installation position records, line mileage records, support positioning records, and adjacent span connection records of all phase insulators within the phase separation zone are first uniformly aligned with coordinates, ensuring that each phase insulator corresponds to a unique line distance coordinate and section belonging coordinate. Then, based on the line extension direction, all line distance coordinates are monotonically sorted to generate a phase insulator sequence identifier corresponding one-to-one with each phase insulator. Furthermore, the preceding and following positions, spacing distances, and boundary connection directions between adjacent phase insulators are compared to establish spatial sequence relationships. Here, spatial layout data refers to geometric and positional data that reflects the actual arrangement of phase insulators within the phase separation zone, including at least installation position, relative spacing, line direction, and boundary connection position. Phase insulator sequence identifiers are ordered marks assigned to each phase insulator according to the line direction, ensuring that subsequent conductor height relationships, negative sag relationships, and boundary transition relationships all follow the same order. Spatial sequence relationships refer to the sequential connection relationships and distance association relationships of adjacent phase insulators along the same line direction. In practice, a line distance coordinate sequence can be constructed first, and then adjacent elements can be registered to form a sequential link covering the entire phase separation area. This allows each subsequent conductor height measurement point, negative sag measurement point, and boundary measurement point to be traced back to the corresponding phase separation insulator and its upstream and downstream positions.

[0025] When binding the positioning point guide height data and the midpoint guide height data according to the phase insulator sequence identifier, the corresponding positioning point position and midpoint position are first extracted around each phase insulator. The positioning point guide height value and the midpoint guide height value corresponding to the same phase insulator are then mapped to the same structural recording unit to form a guide height attribute pair. Subsequently, the spatial position of the guide height attribute pair is marked under a unified line distance coordinate system to construct the guide height distribution benchmark. Here, the positioning point guide height data refers to the actual height data of the contact wire or corresponding conductor at the support positioning position of the phase insulator. The midpoint guide height data refers to the actual height data at the middle position of the control span of the phase insulator. The guide height attribute pair refers to the bound combination of the positioning point guide height value and the midpoint guide height value within the same phase insulator, used to describe the basic form of guide height change within the phase insulator. The guide height distribution benchmark refers to the initial guide height distribution reference state of all guide height attribute pairs in a unified line coordinate system. In practice, it is necessary to first check whether there is misalignment, missing or duplicate between each conductor height data and the phase insulator sequence identifier. If there is a time deviation or coordinate deviation, the conductor height data is returned to the corresponding structural position through the measurement point matching rule. Then, all conductor height attributes are expanded along the line direction to obtain the basic conductor height skeleton composed of positioning points and midpoints in the entire section.

[0026] When performing difference calculation and normalization mapping on each phase insulator based on the conductor height distribution benchmark, the local height difference between the midpoint conductor height value and the positioning point conductor height value is first calculated within each phase insulator. Then, the local height difference is normalized and mapped by combining the span length, relative position weight, and section scale corresponding to the phase insulator, generating a local negative sag characterization value. All local negative sag characterization values ​​are arranged according to the phase insulator sequence identifier, forming a local negative sag point set. Here, the local negative sag characterization value refers to the normalized result of numerically expressing the degree of conductor height sag within a single phase insulator; the local negative sag point set refers to the ordered set of local negative sag characterization values ​​corresponding to each phase insulator within the entire phase separation area. The expression for the local height difference is:

[0027]

[0028] in, This represents the local height difference of the i-th phase insulator, and the value reflects the degree of guide height offset between the midpoint position and the positioning point position; This represents the midpoint conduction height value corresponding to the i-th phase insulator, which is taken from the midpoint conduction height data. This represents the guide height value at the positioning point corresponding to the i-th phase insulator, taken from the guide height data at the positioning point. This expression reflects the trend of guide height change from the support position to the mid-span position by comparing the height difference between two key structural locations within the same phase insulator.

[0029] The expression for the normalization mapping is:

[0030] in, This represents the local negative sag value corresponding to the i-th phase insulator; The effective span length corresponding to the i-th phase insulator is determined by the spatial distance between the phase insulator and the adjacent support boundary. This represents the span scale adjustment coefficient, which is used to control the intensity of the influence of span length on the local negative sag characterization. The value can be set within a preset range according to the consistency requirements of the line structure. This represents the position weight corresponding to the i-th phase insulator, used to characterize the importance of this position within the entire section. It can be assigned a value based on the control requirements of boundary positions, mid-section positions, or pantograph-catenary sensitive positions. This expression, through scale and weight correction of the local height difference, makes the local negative sag results obtained under different span conditions comparable, thereby avoiding distortion of the simple height difference under different structural scales.

[0031] When performing neighborhood association processing and dynamic weight adjustment processing on the local sag point set based on spatial sequence relationships, the preceding and following neighbor points are first determined around each local sag characterization value to construct neighborhood association units between local sag points. Then, the degree of difference, direction of change, and slope of change between adjacent local sag characterization values ​​are compared to form a sag association sequence. Subsequently, dynamic weight adjustment is applied to different sections in conjunction with pantograph-catenary relationship data, so that the local sag changes near key current collection positions have higher constraint strength in the sequence. Here, neighborhood association processing refers to establishing continuous constraints around the local sag change relationship between adjacent phase insulators; dynamic weight adjustment processing refers to redistributing the control priority of different local sag points according to the pantograph-catenary operation sensitivity; and the sag association sequence refers to the ordered sag change sequence after introducing the neighbor relationship and dynamic weight. In practice, the adjacent difference and local gradient can be calculated for each local negative sag value. Then, the adjustment weight of the corresponding points can be increased according to the pantograph entry position, boundary crossing position and departure position and other pantograph-catenary sensitive sections, so that the subsequent interpolation and smoothing process can prioritize the continuity of changes in these positions.

[0032] The expression for adjacent differences is:

[0033] in, This indicates that the i-th local negative sag value is related to the i-th local negative sag value. The difference between the local sag values ​​is used to reflect the sag variation between adjacent phase insulators. and These represent the local sag values ​​of two adjacent phase insulators. This expression, by differentiating adjacent points, reflects the strength of local changes in the spatial sequence and forms the basis for identifying local abrupt changes and establishing continuity constraints.

[0034] The expression for dynamic weight update is:

[0035] in, This represents the local negative sag value after dynamic weight adjustment; This represents the dynamic weighting coefficient corresponding to the i-th phase insulator, used to characterize the degree of influence of this position on the stability of pantograph-catenary operation. The value corresponding to the critical current collection position is higher than that of the ordinary position. This represents the original local sag value. This expression uses location-sensitive weighting to give key locations higher control priority in the overall sequence, thus ensuring that the subsequent overall sag distribution better meets the dynamic passage requirements of the pantograph-catenary system.

[0036] When performing spatial interpolation and smoothing on the negative sag correlation sequence, a continuous function segment is first constructed between adjacent phase insulators based on the locally negative sag characterization value after dynamic weight adjustment. Then, a smoothing constraint is applied to the function segment with excessive local fluctuations to form a continuous negative sag function expression. Here, spatial interpolation refers to restoring the continuous change curve between discrete negative sag points, so that even positions not directly sampled have a calculable negative sag expression; smoothing refers to suppressing local abnormal fluctuations and high-frequency oscillations, so that the overall change trend meets the requirements of continuous transition across phase regions; the continuous negative sag function expression refers to the negative sag change function continuously defined along a unified line distance coordinate. In specific implementation, a local interpolation function can be established for each pair of adjacent sampling points first, and then an integrated smoothing constraint can be applied to the function segment within the entire phase region, so that the curve maintains a smooth rate of change while the point values ​​are continuous, thereby avoiding the amplification of local peaks and valleys during subsequent adjustment.

[0037] The expression for spatial interpolation is:

[0038] in, This represents the continuous negative sag function value at a uniform line distance coordinate x; n represents the number of local negative sag points participating in the interpolation. This represents the local negative sag value after dynamic weight adjustment; This represents the interpolation basis function corresponding to the i-th sampling point, used to describe the distribution of the influence of that sampling point on position x. This expression extends the discrete point values ​​into a continuous curve through the interpolation basis function, so that a corresponding negative sag estimate can be obtained for any position along the entire line direction.

[0039] The expression for the smoothing constraint is:

[0040] in, This indicates a smooth optimization objective value; This represents the function value of the continuous negative sag function at the i-th sampling position; This represents the local negative sag value after dynamic weight adjustment for the i-th term; the first term is used to constrain the degree of fit between the continuous function and the discrete point, and the smaller the value, the more sufficient the fit. This represents the smoothing adjustment coefficient, used to control the strength of curve smoothness constraints; This expression represents the second-order change of the continuous negative sag function with respect to the line distance coordinates, used to characterize the curvature of the curve. The integral term constrains the overall curvature strength; a smaller value indicates a smoother curve. By simultaneously considering point value fit and overall smoothness, this expression of the continuous negative sag function preserves the true measurement trend while suppressing local noise and abrupt changes.

[0041] When performing discrete sampling on the continuous negative sag function expression, sampling nodes are first determined under a unified line distance coordinate system based on the preset sampling interval, the distribution of key structural positions, and the density of boundary transition positions. Then, the function values ​​corresponding to each sampling node are extracted from the continuous negative sag function expression to form a negative sag distribution sequence. Discrete sampling here refers to converting the continuous function back into an ordered numerical sequence that can be directly called upon for subsequent modeling, correction, and control adjustments. The negative sag distribution sequence refers to the set of negative sag results arranged sequentially along the line direction and corresponding one-to-one with the structural positions. In specific implementation, higher density sampling nodes should be deployed near the phase break boundary, the connection position of adjacent phase break insulators, and key current collection positions, while a relatively uniform sampling interval can be used in ordinary sections to balance computational efficiency and descriptive accuracy. After sampling, each sampled value needs to be bound to the corresponding phase break insulator sequence identifier, spatial position identifier, and boundary attribution identifier, so that the generated negative sag distribution sequence not only reflects the overall trend but also directly supports subsequent structural constraint correction, stress consistency correction, and overall fitting processing.

[0042] In one possible implementation, structural constraint correction and stress consistency correction are performed on the negative sag distribution sequence to form a corrected negative sag distribution sequence. Specifically, this includes: performing an association mapping between the negative sag distribution sequence and suspension structure parameters, support positioning parameters, contact wire tension parameters, catenary tension parameters, and pantograph-catenary relationship data to form a constraint mapping relationship; identifying positioning constraint points, suspension transition points, phase separation zone boundary points, and mid-span response points based on the constraint mapping relationship, and constructing a structural boundary chain to divide local correction sections; and performing structural constraint deviation detection on the local correction sections. To identify abrupt changes in negative sag, boundary mismatch points, and transition imbalance points, a set of structural deviation identifiers is formed. Based on this set, structural constraint corrections are performed to generate an intermediate negative sag distribution sequence. Using this intermediate negative sag distribution sequence, contact wire tension parameters, and catenary tension parameters, a force transmission relationship chain is constructed, and a force response sequence is generated. Based on the force response sequence, abrupt force changes, tension imbalance points, and transmission reversal points are identified, and force consistency correction processing is performed. The corrected negative sag characterization values ​​are subjected to continuous verification and iterative linkage to generate a corrected negative sag distribution sequence.

[0043] Specifically, when performing correlation mapping between the sag distribution sequence and suspension structure parameters, support positioning parameters, contact wire tension parameters, catenary tension parameters, and pantograph-catenary relationship data, a one-to-one correspondence is first established between sag sampling points and structural location points, force application points, and pantograph-catenary sensitive locations under a unified line distance coordinate system. This ensures that each sag sampling value can be associated with the corresponding dropper transmission position, positioning device action position, contact wire force application position, catenary force application position, and pantograph passage position. Subsequently, the corresponding suspension structure parameters, support positioning parameters, contact wire tension parameters, catenary tension parameters, and pantograph-catenary relationship data are summarized around the same sampling position to form constraint attribute units oriented towards that sampling position. All constraint attribute units are then sequentially expanded along the line direction to generate constraint mapping relationships. Here, suspension structure parameters refer to structural data reflecting the dropper length distribution, dropper arrangement position, and transmission state between the contact wire and catenary. Support positioning parameters refer to data reflecting the constraint effect of support devices, positioning devices, and boundary fixed positions on conductor height and sag. Contact wire tension parameters and catenary tension parameters refer to data reflecting the force distribution and local tension status of the contact wire and catenary along the track direction, respectively. Pantograph-catenary relationship data refers to data describing the contact sensitivity, dynamic impact sensitivity, and transition smoothness requirements of the pantograph and catenary at different locations. Constraint mapping relationship refers to the association result after uniformly binding each negative sag sample value in the negative sag distribution sequence with the corresponding structural constraints, force constraints, and pantograph-catenary constraints. In specific implementation, a sampling location identifier table can be constructed first, and then parameters from different sources can be merged according to the same location identifier, so that all subsequent correction steps no longer depend on independent parameter flows, but rather revolve around a unified constraint mapping relationship.

[0044] When identifying positioning constraint points, suspension transition points, phase separation zone boundary points, and mid-span response points based on constraint mapping relationships and constructing structural boundary chains, all sampling positions in the constraint mapping relationships are first scanned along the line direction. It is determined whether each position corresponds to a direct action position of the positioning device, a position where the suspension structure topology changes, a position where phase separation insulators connect, or a position within the span most sensitive to changes in negative sag. Positions that satisfy the direct action characteristics of the positioning device are marked as positioning constraint points; positions where the distribution of the suspension wires, the suspension transmission method, or the relationship of the load-bearing structure changes are marked as suspension transition points; positions where adjacent phase separation insulators or phase separation zones connect to the external contact network structure are marked as phase separation zone boundary points; and positions between positioning points that are most sensitive to local sag are marked as mid-span response points. Subsequently, these key positions are sequentially connected along the line direction to form a structural boundary chain, with the sections between adjacent key positions serving as local correction sections. Here, positioning constraint points refer to key positions where changes in negative sag must comply with the constraints of the support positioning boundary. Suspension transition points refer to key positions where the suspension transmission state transitions from one structural relationship to another. Phase breakout zone boundary points refer to the critical locations where conductor height and sag need to be connected between different phase breakout insulators or different structural sections. Mid-span response points refer to the locations where local sag changes are most concentrated and most easily reflect structural morphological changes. Structural boundary chains refer to the ordered boundary links formed by the above-mentioned critical locations along a unified line direction. Local correction sections refer to the local correction range jointly defined by adjacent structural boundary chain nodes. In practice, structural boundary chains must not only retain node types but also record the relative distances and boundary attributes between nodes so that subsequent deviation detection can distinguish the correction requirements corresponding to different types of sections.

[0045] When performing structural constraint deviation detection on local correction sections, the adaptation relationship between the negative sag distribution sequence and the corresponding structural boundary chain is first compared within each local correction section. This involves analyzing whether the negative sag value within the section exhibits excessive drift near the positioning constraint point, abnormal rate of change near the suspension transition point, connection breakage near the phase separation zone boundary point, or local peak-valley anomalies near the mid-span response point. Locations where the negative sag increment significantly deviates from the average trend of the section between adjacent sampling positions are identified as negative sag abrupt change points. Locations where the negative sag state at the boundary position fails to maintain consistency with the positioning boundary or connection boundary are identified as boundary mismatch points. Locations where the direction or magnitude of negative sag change on both sides of the suspension transition point does not conform to the suspension transfer logic are identified as transition imbalance points. The identified results are written into the structural deviation identifier set according to location, type, and scope of influence. Here, structural constraint deviation detection refers to the systematic identification of the difference between the negative sag distribution and structural boundary requirements within the local correction section. Negative sag abrupt change points refer to locations where the magnitude of negative sag change is abnormally amplified between adjacent sampling positions. Boundary mismatch point refers to the location where the negative sag at the boundary position does not meet the support positioning constraint or transition constraint. Transition imbalance point refers to the location where the negative sag change relationship on both sides of the suspension transition point is inconsistent with the transmission relationship of the suspension structure. Structural deviation identifier set refers to an ordered set used to record all structural abnormal locations and their abnormal attributes. The negative sag change gradient can be expressed by the following formula:

[0046]

[0047] in, This represents the gradient of negative sag within the i-th sampling interval, used to characterize the rate of change of negative sag between two adjacent sampling positions; and These represent the negative sag values ​​at two adjacent sampling positions, respectively. and These represent the position values ​​of two adjacent sampling locations in the line distance coordinate system. This expression, by comparing the intensity of negative sag change per unit distance, is used to identify whether there are abrupt changes in local correction sections that do not conform to the structural transmission logic. When a certain section... When there is a significant deviation from the average gradient or the boundary allowable gradient of the section, the corresponding position can be further marked as a negative sag abrupt change point or a transition imbalance point.

[0048] When performing structural constraint correction based on the set of structural deviation identifiers, the correction priority is first assigned to different local correction sections according to the type and influence range of each abnormal location in the set of structural deviation identifiers. For boundary mismatch points near the positioning constraint points, boundary locking correction is performed first, so that the corresponding negative sag value converges to the positioning constraint state. For transition imbalance points near the suspension transition points, transition mitigation correction is performed first, so that the rate of change of negative sag on both sides of the transition point gradually approaches the allowable change trend of the suspension structure. For connection anomalies near the boundary points of the phase separation zone, cross-zone connection correction is performed first, so that the negative sag state of adjacent phase separation insulators at the common boundary position is restored to a smooth connection. For local peak-valley anomalies near the response point in the middle of the span, local peak reduction or local valley filling correction is performed, so that the negative sag in the middle is restored to a change range consistent with the boundary and transition states. After completing the above corrections, the correction results of each section are reassembled to form an intermediate negative sag distribution sequence. The structural constraint correction here refers to the geometric consistency correction performed on the original negative sag distribution based only on the structural boundary, support positioning relationship, and suspension transmission relationship. The intermediate negative sag distribution sequence refers to a transitional sequence that has met the structural boundary requirements but has not yet completed mechanical consistency correction. Boundary projection correction can be expressed by the following formula:

[0049]

[0050] in, This represents the corrected negative sag value of the i-th sampling position after projection onto the structural boundary. This represents the original negative sag value at the i-th sampling position. This indicates the lower bound of the negative sag allowed at this location, determined by positioning constraints, suspension constraints, and boundary constraints. This indicates the upper limit of the allowable negative sag at this location, determined by the same constraints. This expression projects the original negative sag value into the allowable range of the structure, bringing outliers back to the feasible range, thereby eliminating boundary drift and local overshoot problems. For transition sections, continuous variation constraints can be further applied to adjacent correction values ​​to ensure that the intermediate negative sag distribution sequence has segmental continuity in geometric shape.

[0051] When constructing a force transmission relationship chain and generating a force response sequence based on the intermediate negative sag distribution sequence, contact wire tension parameters, and catenary tension parameters, the transmission relationship between the contact wire tension parameters and catenary tension parameters at each sampling location is first analyzed along the track direction. The extension direction, attenuation mode, and coupling effect of tension from the upstream to the downstream section are identified. Then, the intermediate negative sag distribution sequence is mapped onto this tension transmission structure to obtain the force response result corresponding to each sampling location under the existing negative sag state. Subsequently, the force response results of each sampling location are connected according to the track direction to form a force response sequence. Here, the force transmission relationship chain refers to the ordered relationship chain describing how tension is transmitted, distributed, and coupled between the contact wire and catenary, as well as between adjacent sampling locations. The force response sequence refers to the sequence of local force state changes exhibited at each sampling location under the constraint of the intermediate negative sag distribution sequence. In practice, the position of the contact wire tension parameter and the catenary tension parameter can be synchronized first, and then the suspension transmission direction can be introduced so that each sampling point not only has a local tension value, but also includes the transmission influence of the adjacent sections before and after it. This allows the force response sequence to reflect the combined effect of single-point force and section transmission.

[0052] The intensity of the force response can be expressed by the following formula:

[0053] in, This represents the force response value at the i-th sampling position, used to characterize the overall force intensity at that position under the current corrected negative sag state; This represents the suspension transmission coefficient at the i-th sampling position, used to reflect the strengthening or weakening effect of the suspension structure on force transmission; This represents the intermediate negative sag value at the i-th sampling position; This represents the contact wire tension value at the i-th sampling position; This represents the tension value of the load-bearing cable at the i-th sampling position; This represents the stress reduction factor for the catenary, used to describe the contribution of the catenary tension to the overall stress response at the current location. This expression couples the intermediate negative sag value with the double-layer tension state and suspension transmission capacity to reflect the actual mechanical response level under a certain negative sag condition, thus providing a quantitative basis for subsequent identification of stress anomalies.

[0054] When identifying stress abrupt change points, tension imbalance points, and transmission reversal points based on the force response sequence and performing force consistency correction, the process first compares the response differences, directional relationships, and transmission continuity between adjacent sampling positions along the force response sequence. Locations with abnormally large increases in force response increments between adjacent positions are identified as stress abrupt change points. Locations where the tension state of the contact wire and the tension state of the catenary cable within the same section are significantly mismatched, resulting in a mismatch between the sag change and the tension support capacity, are identified as tension imbalance points. Locations where local reverse changes or coupling breaks occur in the force chain that should maintain unidirectional transmission are identified as transmission reversal points. After identification, local load release or local load equalization correction is performed for stress abrupt change points, negative sag convergence or negative sag release correction is performed for tension imbalance points, and bilateral linkage callback correction is performed for transmission reversal points, ensuring that the corrected negative sag change trend is consistent with the tension transmission direction. The force consistency correction here refers to the further adjustment of the negative sag distribution based on the logic of force balance and tension transmission, after the structural geometry has basically met the requirements. Force abrupt change points refer to locations where the force response suddenly increases or decreases between adjacent positions; tension imbalance points refer to locations where the negative sag shape does not match the local tension support capacity; transmission reversal points refer to locations where the force transmission direction or coupling direction changes abnormally in the opposite direction. The force response difference can be expressed by the following formula:

[0055]

[0056] in, This represents the force response difference within the i-th sampling interval, used to characterize the magnitude of force response change between two adjacent sampling positions; and These represent the force response values ​​at two adjacent sampling locations. By comparing the spatial continuity of the force response, this expression can identify situations such as excessively rapid local load release, excessive load accumulation, or abnormal transmission direction.

[0057] Force consistency callback can be expressed as follows:

[0058] in, This represents the negative sag value of the i-th sampling position after force consistency correction; This represents the intermediate negative sag value at the i-th sampling position; This represents the force correction coefficient at the i-th sampling position, used to control the intensity of the influence of the force deviation at that position on the negative sag correction. This represents the force response value at the i-th sampling position; This represents the average force response value of the neighborhood segment where the i-th sampling location is located, reflecting the local equilibrium level that this location should approach. This expression compares the local force response with the neighborhood average force response, allowing locations with excessively high forces to moderately adjust their negative sag, and locations with excessively low forces to moderately release their negative sag, thereby restoring the force balance and transmission continuity within the segment.

[0059] When performing continuous verification and linked iteration on the corrected negative sag values, all negative sag values ​​after stress consistency correction are first remapped to a unified line distance coordinate system. This checks whether local repetitive oscillations, boundary transition rebounds, local peak-valley residuals, or cross-regional connection residuals still exist between adjacent sections. If the negative sag changes between adjacent sampling points within a section show reverse alternation at multiple locations, local repetitive oscillations are identified. If the boundary point deviates from the allowable boundary range again after correction, boundary transition rebounds are identified. If there are still non-negligible conduction height or negative sag residuals near the common boundary of adjacent phase insulators, cross-regional connection residuals are identified. For the above situations, the corresponding abnormal sections are fed back into the structural constraint correction step and the stress consistency correction step. The boundary constraint weights, stress callback coefficients, and neighborhood coupling ranges are adjusted, and linked iterations are performed until all anomalies are suppressed. Finally, the corrected negative sag distribution sequence is output. The continuity verification here refers to the process of re-verifying the continuity of negative sag changes and boundary smoothness across the entire section after structural and stress corrections have been completed. Linked iteration refers to the process of feeding back anomalies discovered during the verification to the aforementioned structural and stress correction stages for joint re-correction. The corrected negative sag distribution sequence refers to the final negative sag sequence that simultaneously satisfies the requirements of structural boundary consistency, stress transmission consistency, and continuity across the entire section. The continuity verification index can be expressed by the following formula:

[0060]

[0061] in, It represents the continuous verification index for the entire section, used to comprehensively measure the smoothness of the negative sag distribution in the first-order and second-order changes after correction; This represents the negative sag value after force consistency correction at the i-th sampling position; the first term characterizes the overall change amplitude between adjacent sampling positions, and the smaller the value, the more stable the change between segments; the second term characterizes the strength of local curvature changes, and the smaller the value, the weaker the local peaks and valleys and repeated oscillations. This represents the curvature constraint adjustment coefficient, used to control the influence of local smoothness on the overall continuity assessment. This expression determines whether the entire correction process has achieved a continuous transition across the entire segment by simultaneously constraining changes at adjacent points and the degree of local bend. Only when the continuity verification index meets the preset requirements is the current result confirmed as a corrected negative sag distribution sequence, allowing it to proceed to the subsequent construction of the cross-phase region guide height transition model and overall fitting processing.

[0062] In one possible implementation, a cross-phase region guide height transition model is constructed based on the modified negative sag distribution sequence, and an overall fitting process is performed to form the overall negative sag target curve of the phase region. Specifically, this includes: performing coordinate registration between the modified negative sag distribution sequence and the basic state set of the phase region to construct a cross-phase region position index chain; identifying guide height connection segments, guide height change segments, and boundary transition segments based on the cross-phase region position index chain, and constructing segment guide height association units; establishing segment guide height baselines based on the segment guide height association units, and generating a segment guide height offset sequence; and based on the segment guide height offset sequence... The following constraints are extracted: continuous guide height constraint, continuous guide height slope constraint, boundary connection constraint, local peak suppression constraint, and smoothness constraint in the pantograph-catenary sensitive area, forming a set of guide height transition constraints across phase-separation zones. Based on the segment guide height offset sequence, the set of guide height transition constraints across phase-separation zones, and the dynamic smoothness enhancement weight field, an overall fitting objective function is constructed and overall fitting processing is performed to obtain the fitting result. The dynamic smoothness enhancement weight field is constructed based on the pantograph-catenary relationship data. The fitting result is superimposed with the segment guide height baseline to form a guide height transition surface expression across phase-separation zones, and the overall negative sag target curve of the phase-separation zone is extracted.

[0063] Specifically, In one possible implementation, based on the overall negative sag target curve of the phase-splitting region, the target positioning point guide height correction amount and the target midpoint guide height correction amount corresponding to each phase-splitting insulator are generated in reverse to construct an overall adjustment parameter set. Specifically, this includes: performing position alignment on the overall negative sag target curve of the phase-splitting region with the phase-splitting region's basic state set, suspension structure parameters, and support positioning parameters to extract the target negative sag reference value; constructing a local guide height inverse solution unit based on the target negative sag reference value, positioning point guide height data, and midpoint guide height data; performing reverse solution of the target midpoint guide height based on the local guide height inverse solution unit to generate the target midpoint guide height value; and based on the target midpoint guide height... The target positioning point guide height value is generated by performing a reverse calculation process using the target positioning point guide height value and the target negative sag reference value. The difference between the target positioning point guide height value and the positioning point guide height data is compared to generate the target positioning point guide height correction amount. The difference between the target midpoint guide height value and the midpoint guide height data is also compared to generate the target midpoint guide height correction amount. The target positioning point guide height correction amount and the target midpoint guide height correction amount are mapped to the physical adjustment domains corresponding to the suspension structure parameters and support positioning parameters to generate structural adjustment components. Based on the target positioning point guide height correction amount, the target midpoint guide height correction amount, and the structural adjustment components, an overall adjustment parameter set is constructed.

[0064] Specifically, when performing coordinate registration between the corrected negative sag distribution sequence and the basic state set of the phase-separation zone, the sampling positions in the corrected negative sag distribution sequence, the installation positions of each phase insulator in the spatial layout data, the positioning point positions corresponding to the positioning point elevation data, the midpoint positions corresponding to the midpoint elevation data, and the key current collection positions corresponding to the pantograph-catenary relationship data are first uniformly mapped to the same line distance coordinate system. A position correspondence table is then established using the phase insulator sequence identifier, ensuring that any negative sag sampling value corresponds one-to-one with the corresponding phase insulator, the corresponding positioning point, the corresponding midpoint, and the corresponding boundary position. Subsequently, all corresponding positions are connected along the line direction according to a monotonically increasing coordinate relationship, forming a cross-phase-separation zone position index chain. Here, coordinate registration refers to unifying data from different sources, structures, and sampling methods under the same line distance reference. The cross-phase-separation zone position index chain refers to the position link formed by orderly connecting each phase insulator and its boundary, elevation control position, and current collection sensitive position within the phase-separation zone along the line direction, ensuring that subsequent segment identification, elevation transition modeling, and overall fitting all revolve around the same spatial sequence. In practice, it is necessary to first perform offset correction on the sampling coordinates of the corrected negative sag distribution sequence, and then map the positioning point position and the midpoint position to the index chain according to the corresponding phase insulator sequence identifier, so that each control position in the entire phase separation area has a unified spatial address and upstream and downstream relationship.

[0065] When identifying conduction height connection sections, conduction height change sections, and boundary transition sections based on the cross-phase zone location index chain, the conduction height connection sections are first identified around the common boundary position between adjacent phase insulators. Then, the conduction height change sections are identified around the conduction height change process within the same phase insulator from the positioning point to the midpoint and from the midpoint to the boundary. Finally, the boundary transition sections are identified around the connection points between the beginning and end of the phase zone and the external contact network structure. Subsequently, using the positioning point, midpoint, boundary, corrected negative sag sampling point, and pantograph-catenary sensitive position within each section as nodes, the correspondence between the conduction height distribution and negative sag distribution in each section is encapsulated into section conduction height association units. Here, the conduction height connection section refers to the section where a continuous conduction height transition is required between adjacent phase insulators. The conduction height change section refers to the section where the conduction height changes from the support constraint position to the middle of the span and then to the connection boundary within the same phase insulator. The boundary transition section refers to the section where a smooth conduction height connection is achieved between the phase zone and the external contact network structure. A section conduction height correlation unit refers to a structural unit that uniformly expresses the corrected negative sag state, conduction height state, boundary state, and current-sensitive state within a certain section. In specific implementation, it can be scanned segment by segment according to the cross-phase zone position index chain. When adjacent positions are found to belong to different phase insulators, a conduction height connection section is established. When adjacent positions belong to different control positions within the same phase insulator, a conduction height change section is established. When the position is located at the beginning and end of the phase zone and the connection with the external structure, a boundary transition section is established. Thus, the entire section is divided into several continuous and interrelated transition sub-segments.

[0066] When establishing a segment guide height baseline and generating a segment guide height offset sequence based on segment guide height association units, the original positioning point guide height value, midpoint guide height value, and corresponding corrected negative sag value are first extracted within each segment guide height association unit. The positioning point guide height value and midpoint guide height value are then used to construct the basic guide height shape of the segment before overall transition modeling. The corrected negative sag value is then converted into a guide height offset correction amount for this basic guide height shape and expanded along a unified line distance coordinate within the segment to form the segment guide height offset sequence. Here, the segment guide height baseline refers to the basic guide height reference shape determined by the original guide height control position within the segment, used to describe the initial guide height distribution trend of the segment under the current structural state. The segment guide height offset sequence refers to the sequence of guide height changes corresponding to the correction negative sag applied to the segment guide height baseline, used to characterize the magnitude and direction of the adjustment required for the segment to transition to the overall target state. In practice, a local baseline function can be established for the location of the positioning point and the midpoint within the segment. Then, the modified negative sag value is used to offset the local baseline function so that each modified negative sag sample value can be converted into an offset in the sense of guide height, thereby realizing a unified conversion from negative sag expression to guide height expression.

[0067] The section guide height baseline can be represented as:

[0068] in, This represents the baseline value of the segment guide height at position x for the kth segment guide height association unit, used to describe the basic guide height distribution state of this segment; and These represent the guide height contribution functions of the positioning point and the midpoint within the kth segment, respectively, which are used to characterize the proportion of the influence of different structural control positions on the guide height of the current position. This represents the guide height value corresponding to the location point of the k-th segment; This represents the guide height value corresponding to the midpoint of the k-th segment. This expression continuously combines the guide height values ​​of the positioning point and the midpoint according to their spatial positions to form a basic guide height reference pattern within the segment, ensuring that subsequent offset calculations are always based on the actual guide height structure.

[0069] The section guide height offset can be expressed as:

[0070] in, This represents the segment guide height offset at position x for the k-th segment, used to characterize the magnitude of guide height change caused by the correction of negative sag to the segment guide height baseline; The negative sag guidance height mapping coefficient of the kth segment is used to describe the degree of structural response when the negative sag guidance height offset conversion is corrected. This represents the corrected negative sag value at position x for the k-th segment. This expression converts the corrected negative sag into a guide height offset according to the segment's structural characteristics, allowing subsequent overall fitting to directly revolve around the guide height change, rather than remaining at the level of a simple negative sag value.

[0071] When extracting continuous conduction height constraints, continuous conduction height slope constraints, boundary connection constraints, local peak suppression constraints, and pantograph-catenary sensitive area smoothness constraints based on the section conduction height offset sequence, the section conduction height offset sequences between adjacent sections are first aligned at the boundaries, and the difference in conduction height offset values ​​on both sides of the section boundary is extracted to construct continuous conduction height constraints. Then, the offset change rates on both sides of the boundary are compared to construct continuous conduction height slope constraints. Further, the offset differences between the first and last sections of the phase-splitting zone and the external catenary structure are compared to construct boundary connection constraints. Simultaneously, the local peak-valley changes within each section are scanned, and local peak suppression constraints are constructed for peaks or valleys exceeding the local smoothness requirements. Finally, the pantograph-catenary relationship data is combined to identify the pantograph entry position, boundary crossing position, continuous current collection position in the middle, and end release position. The smoothness requirements for offset changes near these key positions are extracted as pantograph-catenary sensitive area smoothness constraints, and all the above constraints are uniformly summarized into a cross-phase-splitting zone conduction height transition constraint set. Here, continuous conduction height constraints refer to constraints that prevent abrupt jumps in conduction height values ​​at the boundary positions of adjacent sections. The continuity constraint on guide height slope refers to the constraint that prevents abrupt changes in the rate of change of guide height at the boundary positions of adjacent sections. The boundary connection constraint refers to the constraint that prevents boundary misalignment during the transition of guide height between the beginning and end of the phase separation zone and the external structure. The local peak suppression constraint refers to the constraint that prevents the appearance of local abnormal high or low points within a section. The pantograph-catenary sensitive area smoothness constraint refers to the constraint that strengthens the smoothness of guide height at key current-receiving locations. The cross-phase separation zone guide height transition constraint set refers to the set of constraints that must be simultaneously satisfied for the overall fitting of the entire phase separation zone. In practical implementation, zero-order and first-order continuity conditions can be extracted first at the boundaries of adjacent sections, and then higher-priority smoothness conditions can be introduced at key current-receiving locations, so that static guide height continuity and dynamic current-receiving stability are both included in the fitting framework.

[0072] The guide height continuity constraint can be expressed as:

[0073] in, Indicates the position of the k-th segment at the boundary. The guide height value approaching on the left. Indicates the first Each section is located at the boundary. The guide height value approaching on the right. This represents the allowable threshold for guide height continuity, used to limit the maximum permissible difference between guide height values ​​on both sides of a boundary. This expression ensures that guide height values ​​remain continuous at the boundary between adjacent segments, thereby avoiding geometric jumps.

[0074] The guide slope continuity constraint can be expressed as:

[0075] in, Indicates the position of the k-th segment at the boundary. The rate of change of conductance at that point. This represents the rate of change of the guide height at the same boundary position in the (k+1)th segment. This represents the allowable threshold for continuous guide height slope, used to limit the difference in guide height change rate between the two sides of the boundary. This expression is used to ensure the continuity of the transition trend between adjacent sections, thereby avoiding sudden slope changes experienced by the pantograph when passing through.

[0076] The local peak suppression constraint can be expressed as:

[0077] in, This represents the second-order change in the guide height at position x in the k-th segment, used to characterize the degree of local curvature. This represents the local peak suppression threshold, used to limit the maximum allowable intensity of local peak-valley variations. This expression prevents the formation of small-scale anomalous peaks and valleys within a segment by suppressing locations with excessive local curvature.

[0078] When constructing the overall fitting objective function based on the section guide height offset sequence, the cross-phase zone guide height transition constraint set, and the dynamic smoothness enhancement weight field, and performing overall fitting processing, the current collection sensitivity of different locations is first quantified based on the pantograph-catenary relationship data. Higher dynamic smoothness enhancement weights are assigned to the pantograph entry position, boundary crossing position, mid-section high-sensitivity position, and end-release position, thus forming the dynamic smoothness enhancement weight field. Subsequently, the section guide height offset sequence is used as the fitting object, the cross-phase zone guide height transition constraint set is transformed into a penalty or restriction term in the fitting solution, and the dynamic smoothness enhancement weight field is introduced into the fitting error term, assigning a higher cost to errors at key locations. Finally, a unified continuous curve is selected across the entire phase zone, and overall fitting processing is performed simultaneously on all sections to obtain the fitting results. Here, the dynamic smoothness enhancement weight field refers to a weight function distributed along a unified line distance coordinate, used to characterize the strength of the influence of different locations on the pantograph-catenary dynamic smoothness. The overall fitting objective function is the solution objective that simultaneously characterizes the degree of guide height offset fit, the degree of constraint satisfaction, and the priority of dynamic smoothness. Global fitting refers to the unified and continuous modeling of all segments in the entire phase separation region within the same solution framework, rather than fitting each segment independently. In practice, a fitting curve composed of globally continuous basis functions can be constructed first, and then the fitting curve can be optimized to simultaneously meet the requirements of conforming to the original migration sequence, maintaining boundary continuity, suppressing local peaks, and prioritizing the smoothness of the pantograph-catenary sensitive positions throughout the entire region.

[0079] The dynamic smooth augmented weight field can be represented as:

[0080] in, The value represents the dynamic smoothness enhancement weight at position x, used to characterize the control priority of this position on dynamic smoothness in the overall fit; Q represents the number of key flow-receiving positions. This represents the weight enhancement coefficient of the q-th key flow receiving position, used to reflect the importance of this key position. The larger the value, the more priority is needed to ensure smoothness at this position. Represents the line distance coordinates of the q-th critical current receiving location; This represents the expansion coefficient of the influence range of the q-th key flow-receiving location, used to control the width of the influence of this key location on the neighboring area. This expression, by superimposing local enhancement distributions near the key flow-receiving locations, inflicts a higher error cost on these locations during the fitting process, thereby ensuring that the overall fitting result prioritizes meeting the dynamic passage requirements.

[0081] The overall fitting objective function can be expressed as:

[0082] in, This represents the overall objective function value, used to comprehensively evaluate the quality of the fitted curve; The line distance range of the entire phase separation zone is represented by ; W(x) represents the dynamic smoothness enhancement weight value at position x; G(x) represents the overall fitting function to be solved, which is used to describe the unified guide height offset expression of the entire phase separation zone; D(x) represents the target guide height offset reference function formed by splicing the guide height offset sequences of each segment; the first term represents the weighted fitting error, the smaller the value, the closer the fitting curve is to the segment guide height offset sequence and the more attention is paid to fitting accuracy at key current receiving positions; Indicates the continuous constraint term; This indicates the continuous constraint term for the guide slope; Indicates boundary connection constraints; This represents a local peak suppression constraint term; This indicates the smoothness constraint term in the pantograph-catenary sensitive area; to These represent the weight coefficients of each constraint term, used to adjust the intensity of the effect of different constraints in the overall fitting. The principle behind this expression is that by using a unified optimization objective to simultaneously balance data fit, structural continuity, boundary smoothness, and dynamic flow stability, the fitting result for the entire segment is no longer a single geometric optimum, but rather a transitional optimum in a comprehensive sense.

[0083] When overlaying the fitted results with the section conductor height baseline to form a cross-phase zone conductor height transition surface and extracting the overall negative sag target curve for the phase zone, the unified conductor height offset function obtained from the overall fitting process is first applied to the conductor height baseline of each section. This ensures that the basic conductor height state of each section is superimposed with the conductor height correction result obtained from the global fitting. The superimposed results of all sections are then stitched together along a unified line distance coordinate to form a continuous cross-phase zone conductor height transition surface. Subsequently, the dominant conductor height change trajectory is extracted from the positioning point, midpoint, boundary, and key current collection points of each phase insulator within the cross-phase zone conductor height transition surface. Following the definition of negative sag, this dominant conductor height change trajectory is converted into the overall negative sag target curve for the phase zone. Here, the cross-phase zone conductor height transition surface refers to a continuous conductor height transition expression covering all sections of the entire phase zone, with the line distance coordinate as the main axis and the conductor height state as the function value. The overall negative sag target curve for the phase-separation zone refers to the target negative sag change curve that should be achieved across the entire section while meeting the requirements of continuous transition across phase-separation zones, boundary connection, and dynamic smoothness of the pantograph-catenary system. In specific implementation, the fitted unified offset function is first superimposed with the conductor height baseline of each section to form a complete conductor height target distribution. Then, the target conductor height points are extracted at the control positions of the phase-separation insulators. By comparing them with the conductor height reference state of the positioning points, the target negative sag result unfolding along the entire section is obtained, which serves as the unified basis for the subsequent reverse generation of the target positioning point conductor height correction amount and the target midpoint conductor height correction amount.

[0084] The transition surface of the conduction height across the phase separation region can be expressed as:

[0085] in, The target guide height value across phase divisions at position x is used to describe the guide height transition state after superimposing the overall fitting results; B(x) represents the basic guide height function of the entire segment formed by splicing the guide height baselines of each segment; G(x) represents the unified guide height offset function obtained by the overall fitting process. This expression obtains the final target guide height transition expression by superimposing the basic guide height shape with the overall fitting correction amount, thereby unifying local segment information into a global continuous result.

[0086] The overall negative relaxation target curve of the phase separation region can be expressed as:

[0087] in, This represents the overall negative sag target value of the phase separation region at position x, used to characterize the target negative sag state that should be achieved at this position; This represents the target elevation value across the phase separation region at position x; The reference guide height function at position x corresponds to the guide height reference state of the positioning point and is used as a benchmark for negative sag. This expression compares the target guide height state with the reference guide height state, converting the continuous guide height transition result back into a unified negative sag target expression for the entire segment, allowing the overall fitting result to directly enter the subsequent inverse solution and coordinated adjustment control process.

[0088] Reference Figure 2 The figure illustrates the trend of the overall negative sag target curve for the phase-splitting zone under a unified line distance coordinate system. The horizontal axis represents the distance of the phase-splitting zone along the line direction, and the vertical axis represents the target negative sag value at the corresponding location. At the beginning of the phase-splitting zone, the negative sag changes relatively gently, ensuring a smooth transition with the preceding contact network structure. As the line distance increases, the negative sag gradually deepens, forming a continuously varying region in the middle section. This region reflects the main range of influence of conductor height adjustment within the phase-splitting zone. Near the boundary of the phase-splitting zone and key current collection locations, the curve changes smoothly, avoiding local abrupt changes or peak-valley anomalies, thus ensuring contact stability when the pantograph passes. At the end of the phase-splitting zone, the negative sag gradually increases, achieving a transitional connection with the subsequent contact network structure. The overall curve remains continuous and the rate of change is controlled throughout the entire section, reflecting the cross-phase-splitting zone conductor height transition target state obtained through overall fitting while meeting structural constraints and stress consistency.

[0089] In one possible implementation, coordinated adjustment control is performed on each phase insulator based on the overall adjustment parameter set. Specifically, this includes: performing control mapping processing on the overall adjustment parameter set with spatial layout data, suspension structure parameters, support positioning parameters, contact wire tension parameters, catenary tension parameters, and pantograph-catenary relationship data to establish a control mapping relationship; arranging adjustment sequences according to the control mapping relationship and section priority identifiers to form a coordinated adjustment sequence and constructing a linkage adjustment unit; performing positioning pre-adjustment on the aforementioned support positioning parameters based on the coordinated adjustment sequence to form a positioning point guide height support state; performing suspension transmission adjustment based on structural adjustment components and suspension structure parameters to drive the midpoint guide height to converge towards the target midpoint guide height state; performing guide height linkage coordination based on the linkage adjustment unit to achieve guide height coupling adjustment between adjacent phase insulators; performing force synchronization control in conjunction with contact wire tension parameters and catenary tension parameters to maintain consistency in the force transmission relationship chain; performing dynamic correction processing based on pantograph-catenary relationship data to optimize the guide height change state at key current collection locations; and performing adjustment result reconstruction processing on the adjusted guide height data to generate an adjusted guide height distribution sequence and an adjusted negative sag characterization sequence.

[0090] Specifically, when performing control mapping processing on the overall set of adjustment parameters and spatial layout data, suspension structure parameters, support positioning parameters, contact wire tension parameters, catenary tension parameters, and pantograph-catenary relationship data, a structural position index table for each phase insulator is first established under a unified line distance coordinate system. Then, the target positioning point guide height correction, target midpoint guide height correction, structural adjustment component, boundary connection correction identifier, and section priority identifier in the overall set of adjustment parameters are mapped one by one to the corresponding phase insulator, the corresponding positioning point position, the corresponding midpoint position, and the corresponding boundary position, so that each adjustment parameter has a clear target, position, and constraint. Subsequently, the suspension structure parameters, support positioning parameters, contact wire tension parameters, catenary tension parameters, and pantograph-catenary relationship data corresponding to the same position are bound to the adjustment parameter, forming a control mapping relationship that can be directly used for execution control. Here, control mapping processing refers to transforming the abstract target adjustment result into an execution control relationship with structural, positional, and force orientation; the control mapping relationship refers to the one-to-one correspondence between adjustment parameters and structural positions, support boundaries, force states, and pantograph-catenary sensitivity states. In practice, a phase insulator-level mapping table can be constructed first, followed by a positioning point-level mapping table and a midpoint-level mapping table. This ensures that all subsequent coordination adjustments revolve around the same controlled object, avoiding cross-matching of different parameters to the same structural position.

[0091] When arranging the adjustment sequence according to the control mapping relationship and the segment priority identifier, the execution priority of each phase insulator is first assigned based on its spatial position in the phase separation zone, its boundary connection task, and the coverage of the pantograph-catenary sensitive area. Phase insulators located at the beginning of the phase separation zone and undertaking the previous-stage boundary connection task are given priority to enter the beginning of the adjustment sequence; phase insulators located in the middle and undertaking the overall curve extension task are entered in the middle of the adjustment sequence; and phase insulators located at the end and undertaking the subsequent-stage boundary release task are entered in the end of the adjustment sequence. For adjacent phase insulators that have a coupling relationship at a common boundary position, a common force transmission position, or a common sensitive position, they are bound into the same linkage adjustment unit and assigned a continuous execution relationship in the coordinated adjustment sequence. Here, the segment priority identifier refers to the identifier used to characterize the execution order and control importance of different phase insulators during the overall adjustment process; the coordinated adjustment sequence refers to the orderly adjustment process formed based on segment priority and coupling relationship; and the linkage adjustment unit refers to the combination of phase insulators that need to be adjusted synchronously or in conjunction during the adjustment process. In practice, a primary sequence can be established first, following the basic order of boundary priority, central extension, and terminal release. Then, a secondary sequence can be established within the primary sequence based on the degree of flow sensitivity and the degree of coupling of common boundaries, thereby ensuring that the adjustment actions have orderliness and linkage throughout the entire section.

[0092] When performing positioning pre-adjustment on the support positioning parameters according to the coordinated adjustment sequence, the target positioning point guide height correction and support positioning parameters are first read around the positioning point position corresponding to each phase insulator. Then, based on the target positioning point guide height correction, the operating height of the positioning device, the operating state of the support boundary, and the connection position of adjacent supports are adjusted initially to make the actual guide height of the positioning point position gradually approach the target positioning point guide height state. During the adjustment process, it is also necessary to compare the guide height difference between adjacent positioning points and the connection difference at the boundary position to prevent the positioning point position from meeting the single-point target but forming a new boundary misalignment with the adjacent section. Here, positioning pre-adjustment refers to the pre-adjustment process of establishing the basic guide height state of the positioning point position through the support and positioning structure before formally carrying out the internal span transfer adjustment; the positioning point guide height support state refers to the initial guide height support condition formed at the positioning point position after positioning pre-adjustment. The positioning pre-adjustment amount can be expressed as:

[0093]

[0094] in, This represents the initial adjustment amount of the positioning point guide height actually applied to the i-th phase insulator during the positioning pre-adjustment stage; This represents the positioning pre-adjustment execution coefficient of the i-th phase insulator, which is used to control the proportion of the target correction amount achieved during the pre-adjustment stage. Its value is usually set between zero and one. This represents the target positioning point guide height correction amount for the i-th phase insulator. This expression is used to make the positioning pre-adjustment gradually approach the target positioning point guide height state, rather than adjusting it to the target value all at once, thus reserving linkage correction space for subsequent suspension transmission adjustments.

[0095] When performing suspension transmission adjustment based on structural adjustment components and suspension structure parameters, the positioning point guide height support state formed after positioning pre-adjustment is first used as the boundary input. Then, according to the adjustment requirements in the structural adjustment components regarding changes in the length of the dropper, changes in the suspension transmission position, and the relative interaction between the contact wire and the catenary, the guide height transmission path from the positioning point to the midpoint position inside each phase insulator is continuously corrected, so that the actual guide height at the midpoint position gradually converges to the target midpoint guide height state. In this process, it is necessary to simultaneously consider the transmission capacity range and transmission direction range limited by the suspension structure parameters to prevent the guide height change at the positioning point from failing to be effectively transmitted to the midpoint position, or from forming local over-adjustment during the transmission process. Here, suspension transmission adjustment refers to the process of continuously transmitting the boundary guide height state of the positioning point to the midpoint position and completing the target adjustment of the midpoint position by utilizing the guide height transmission relationship inside the suspension structure. The structural adjustment component refers to the specific structural adjustment amount obtained by decomposing the dropper, suspension transmission path, and support boundary position to achieve the target positioning point guide height correction amount and the target midpoint guide height correction amount. The transmission adjustment amount at the midpoint position can be expressed as:

[0096]

[0097] in, This represents the initial transmission adjustment amount of the midpoint conductor height formed by the i-th phase insulator during the suspension transmission adjustment stage; This represents the suspension transfer coefficient of the i-th phase insulator, used to characterize the effectiveness of the guide height adjustment at the positioning point in transferring to the midpoint position. This represents the initial adjustment amount of the positioning point guide height formed by the i-th phase insulator during the positioning pre-adjustment stage; This represents the additional midpoint compensation applied to the i-th phase insulator based on the structural adjustment component, used to correct local differences that cannot be covered by positioning point transmission alone. This expression demonstrates that the change in conduction height at the midpoint position is not generated independently, but is jointly determined by the effects of positioning point transmission and structural compensation, thus ensuring coordinated convergence of the positioning point target and the midpoint target within the same structural system.

[0098] When performing height coordination based on the linkage adjustment unit, the system first compares the height status of the positioning point, midpoint, and boundary connection of the two phase insulators at the current stage, focusing on the common boundary position, common transition position, and common sensitive position between adjacent phase insulators. Then, based on the boundary difference, gradient difference, and sensitive area smoothness difference, the height adjustment amount between the adjacent phase insulators is redistributed to ensure a continuous transition in height change between them rather than local breaks. If the midpoint adjustment of a phase insulator is too large while the boundary adjustment of the adjacent phase insulators is insufficient, part of the adjustment responsibility is transferred to the adjacent phase insulators to suppress boundary jumps caused by localized adjustment concentration. Here, height coordination refers to the process of jointly allocating and synchronously constraining the height adjustment amount based on the common position and common target of multiple coupled phase insulators. The boundary coordination amount between adjacent phase insulators can be expressed as:

[0099]

[0100] in, This represents the coordination correction amount between the i-th and (i+1)-th phase insulators at their common boundary position; and These represent the boundary coordination weights corresponding to two adjacent phase insulators, used to characterize the proportion of boundary correction responsibility each bears; and These represent the current boundary conduction height states on both sides of the common boundary location. This expression distributes the differences between the two sides of the common boundary according to weights, so that boundary coordination is no longer undertaken independently by one side, but is jointly completed by adjacent phase insulators, thereby improving the continuity of conduction height across the phase break zone.

[0101] When performing synchronous force control by combining contact wire tension parameters and catenary tension parameters, the force response level of each sampling position is first recalculated based on the current stage's guide height adjustment results. Then, the contact wire tension transmission state, catenary tension transmission state, and overall force change trend are compared between adjacent positions. If it is found that local adjustment of a certain phase insulator leads to excessive contact wire tension accumulation, the single adjustment step size of that phase insulator is reduced, and part of the guide height adjustment is transferred to adjacent phase insulators. If it is found that a certain area has a mismatch between guide height change and tension support due to insufficient catenary support, a gradual correction is performed on that area to bring it back into the force balance range. Synchronous force control here refers to simultaneously constraining and correcting the tension transmission state while coordinating guide height linkage, ensuring consistency between geometric adjustment and mechanical transmission. The force transmission relationship chain refers to the chain relationship along the line direction that characterizes how the force is continuously transmitted between the contact wire, catenary, and suspension structure. The overall synchronous force deviation can be expressed as:

[0102]

[0103] in, It represents the comprehensive force synchronization deviation at the position corresponding to the i-th phase insulator, which is used to characterize the degree of deviation of the current tension state at that position from the average state of the neighborhood. This represents the contact wire tension value at the i-th position; This represents the average tension value of the contact wire in the neighborhood of the i-th position; This represents the tension value of the load-bearing cable at the i-th position; This represents the average tension value of the catenary in the neighborhood of the i-th position; and These represent the adjustment coefficients for contact wire tension deviation and catenary tension deviation in the comprehensive judgment, respectively. This expression, by jointly measuring the two types of tension deviation, is used to determine whether a certain position is still within the acceptable stress range for coordinated adjustment, thereby deciding whether further adjustment of the guide height is needed.

[0104] When performing dynamic pass-through correction based on pantograph-catenary relationship data, the following steps are taken: First, extract the corresponding pantograph-catenary sensitive indicators around the pantograph entry position, boundary crossing position, continuous current collection position in the middle, and end release position. Then, check the conduction height change rate, boundary conduction height difference, and local peak-valley residual at these positions under the current adjustment state. If the conduction height change rate is too fast at a key current collection position, the conduction height adjustment at the positioning point and the midpoint of the phase insulators on both sides is reduced in a coordinated manner. If there is a local peak-valley residual, the corresponding suspension transmission path is locally mitigated and corrected. If there are signs of dynamic unevenness at the boundary crossing position, the boundary coordination strength on both sides of the common boundary position is increased. This dynamic pass-through correction refers to the process of re-correcting the static conduction height adjustment results based on the dynamic pass-through process of the pantograph. Its purpose is to ensure a smooth transition at key current collection positions under dynamic operating conditions. The dynamic smoothness index of the key current collection position can be expressed as:

[0105]

[0106] in, The dynamic smoothness index represents the j-th key flow receiving location, and is used to comprehensively characterize the smoothness level of this location in terms of conductor height change rate, boundary connection poorness and local curvature. Represents the line distance coordinates of the j-th critical flow receiving location; This indicates the rate of change of elevation at this key location, used to reflect the strength of slope changes; This indicates the difference in elevation between the left and right sides of the key location, used to reflect boundary jump variables; This indicates the second-order variation of the guide height at this critical location, used to reflect the intensity of local peaks and valleys; , as well as These represent the weighting coefficients of the three factors mentioned above. This expression is used to comprehensively evaluate key current collection locations from a dynamic perspective. The smaller the value, the smoother the change in conductor height at that location, which is more conducive to the stable passage of the pantograph.

[0107] When reconstructing the adjusted conductor height data, the actual conductor height data of each phase insulator at the positioning point, midpoint, common boundary, and key current collection points are first re-collected. This data is then mapped to a unified line distance coordinate system, forming an adjusted conductor height distribution sequence. Next, based on a comparison between the adjusted conductor height distribution sequence and the reference conductor height state at each positioning point, the actual conductor height offset and actual local sag change for the entire section are calculated, forming an adjusted sag characterization sequence. This adjustment result reconstruction process refers to reorganizing the actual results, after multiple rounds of positioning pre-adjustment, suspension transmission adjustment, conductor height linkage coordination, force synchronization control, and dynamic pass-through correction, into a unified and comparable serialized result. The adjusted conductor height distribution sequence refers to the sequence of actual conductor height states arranged sequentially along the line direction. The adjusted sag characterization sequence refers to the sequence of actual sag states calculated from the adjusted conductor height distribution. The actual local sag can be expressed as:

[0108]

[0109] in, This represents the actual local sag value of the i-th phase insulator after the coordinated adjustment control is completed; This represents the actual midpoint conduction height value of the i-th phase insulator after adjustment; This represents the actual sag at the positioning point of the i-th phase insulator after adjustment. This expression is used to convert the adjusted actual sag result back into a negative sag expression, so that subsequent verification steps can be completed and verified under a characterization system consistent with the target negative sag target curve.

[0110] In practice, the adjustment result reconstruction process is not simply a summary of the final measured values. Instead, it involves binding the adjusted conductor height distribution sequence, the adjusted negative sag characterization sequence, the common boundary position status, and the key current collection position status to the phase insulator sequence identifier and the cross-phase zone position index chain. This allows subsequent adjustment deviation verification, conductor height continuity verification, and pantograph-catenary dynamic consistency verification to directly call the output results in a unified format.

[0111] In one possible implementation, a verification is performed based on the adjusted guide height data and pantograph-catenary relationship data, and the overall negative sag adjustment result is output when preset conditions are met. Specifically, this includes: registering the adjusted guide height data, boundary connection location data, key current collection location data, and pantograph-catenary relationship data to construct a verification state mapping table; performing target association based on the verification state mapping table with the overall negative sag target curve of the phase separation zone, the overall adjustment parameter set, and the negative sag distribution sequence before adjustment to form a verification reference relationship; performing adjustment deviation verification on the verification reference relationship to generate adjustment deviation characterization values; performing deviation grading judgment processing on the adjustment deviation characterization values ​​and constructing a deviation propagation diagram; performing guide height continuity verification based on the verification state mapping table to generate a guide height continuity characterization sequence; performing pantograph-catenary dynamic consistency verification processing based on the pantograph-catenary relationship data to generate a pantograph-catenary dynamic response sequence; performing linkage consistency analysis on the pantograph-catenary dynamic response sequence, guide height continuity characterization sequence, and deviation propagation diagram to construct a dynamic consistency judgment map; and performing preset condition judgment processing based on the dynamic consistency judgment map, outputting the overall negative sag adjustment result when preset conditions are met.

[0112] Specifically, when registering the adjusted conductor height data, boundary connection location data, key current collection location data, and pantograph-catenary relationship data, the conductor height values ​​of the positioning points, midpoints, common boundary locations, and key current collection locations, which were re-acquired after the coordination and adjustment control were completed, were first uniformly mapped to the same line distance coordinate system and the same sampling time coordinate system. Then, the corresponding contact states, contact force change states, offline tendency states, and dynamic transition states in the pantograph-catenary relationship data were synchronously mapped to the same location identifier and time identifier, so that any sampling location simultaneously possesses the static conductor height state, boundary connection state, key current collection state, and pantograph-catenary dynamic state. Subsequently, a verification state mapping table was established according to the phase insulator sequence identifier, location type identifier, and sampling time identifier. Here, registration refers to the process of unifying data from different sources, different sampling locations, and different sampling times onto the same spatial coordinates and the same time reference. Boundary connection location data refers to the conductor height state data corresponding to the common boundary locations of adjacent phase insulators and the connection locations between the beginning and end of the phase zone and the external contact network structure. Key current collection location data refers to the conductor height status data corresponding to the pantograph entry position, boundary crossing position, continuous current collection position in the middle, and end release position. The verification status mapping table refers to the status mapping result formed by uniformly binding all adjusted conductor height status, boundary status, key current collection status, and pantograph-catenary dynamic status around the same location identifier and time identifier. In specific implementation, a location-level index table can be constructed first, followed by a time-level index table. Finally, using both the location-level and time-level index tables as dual indexes, various types of sampled data are written into the corresponding units, so that subsequent verification processes no longer require repeated location and time matching.

[0113] When performing target association based on the verification state mapping table, the overall negative sag target curve of the phase-separation zone, the overall adjustment parameter set, and the negative sag distribution sequence before adjustment, the following steps are taken: First, the actual positioning point guide height state, actual midpoint guide height state, actual boundary connection state, and actual key current collection state corresponding to each position unit in the verification state mapping table are read. Then, the target negative sag value corresponding to the same position is extracted from the overall negative sag target curve of the phase-separation zone. The target positioning point guide height correction, target midpoint guide height correction, and structural adjustment component corresponding to the same position are extracted from the overall adjustment parameter set. The original negative sag state of the same position before adjustment is extracted from the negative sag distribution sequence before adjustment. Subsequently, the above target state, execution state, and historical state are bound one-to-one with the actual state in the verification state mapping table to form a verification reference relationship. Here, target association refers to the process of establishing a unified comparison relationship between the actual result, target result, adjustment execution result, and pre-adjustment baseline result around the same position. Verification reference relationship refers to a reference structure that simultaneously possesses the actual state, target state, execution state, and historical state at the same position. In practice, a position reference tuple can be generated for each position unit, so that subsequent adjustment deviation verification, guide height continuity verification and pantograph-catenary dynamic consistency verification are all carried out under the same reference system, thereby ensuring that the results of different verification steps can be directly linked and compared.

[0114] When performing adjustment deviation verification based on the verification reference relationship, firstly, the difference between the actual and target elevation states of each positioning point is compared. Then, the difference between the actual and target midpoint elevation states is compared. This is combined with the target positioning point elevation correction, target midpoint elevation correction, and structural adjustment components recorded in the overall adjustment parameter set to determine whether the current actual elevation result has reached the expected adjustment range. Further, the adjusted local negative sag state is compared with the target negative sag value at the corresponding position in the overall negative sag target curve of the phase separation region, generating adjustment deviation characterization values ​​covering positioning point positions, midpoint positions, boundary positions, and key flow-receiving positions. This adjustment deviation verification refers to the quantitative evaluation of the difference between the actual adjustment result and the target adjustment result. The adjustment deviation characterization value is a comprehensive numerical value representing the degree to which the actual adjustment result at a certain position deviates from the target result. The adjustment deviation characterization value can be expressed as:

[0115]

[0116] in, The value representing the adjustment deviation at the i-th check position is used to comprehensively reflect the degree of deviation between the actual adjustment state and the target adjustment state at that position. This represents the actual elevation value of the i-th position after adjustment. This represents the elevation value of the target positioning point at position i. This represents the actual midpoint elevation value after adjustment at the i-th position; This represents the guide height value of the target midpoint at position i; This represents the actual negative sag value after adjustment at the i-th position; This represents the target negative sag value at position i; , as well as These represent the weighting coefficients of the positioning point elevation deviation, midpoint elevation deviation, and negative sag deviation in the comprehensive deviation determination. This expression quantifies these three key differences in a unified manner, allowing a single deviation index to reflect whether a location has met the adjustment target.

[0117] When performing deviation grading and judgment processing on the adjustment deviation characterization values ​​and constructing a deviation propagation diagram, the adjustment deviation characterization values ​​at each location are first classified into permissible deviation states, concern deviation states, and over-limit deviation states based on their magnitude. When the adjustment deviation characterization value is below the lower threshold, it is judged as a permissible deviation state, indicating that the target adjustment requirements at that location have been basically met. When the adjustment deviation characterization value is between the lower and higher thresholds, it is judged as a concern deviation state, indicating that although the location has not yet become unstable, there is still a risk of further amplification. When the adjustment deviation characterization value exceeds the higher threshold, it is judged as an over-limit deviation state, indicating that the location has already had a substantial impact on boundary connection, conductor height continuity, or pantograph-catenary dynamic stability. Subsequently, based on the cross-phase zone position index chain and the linkage adjustment unit relationship, the deviation states between adjacent locations are connected according to spatial adjacency and force transmission relationships to form a deviation propagation diagram. The deviation grading and judgment processing here refers to the processing of classifying the risk level of each location based on the magnitude of the deviation value; the deviation propagation diagram is a graphical structure describing how the deviation propagates along the line direction, boundary direction, and linkage direction, used to characterize the influence path of a deviation at a certain location on adjacent locations and adjacent phase insulators. In practice, each verification location can be treated as a graph node, and spatial adjacency, common boundary, and key flow coupling relationships can be treated as graph edges. When a node is in an out-of-limit deviation state, the downstream or adjacent nodes that it may affect are marked along the graph edges, thus providing a basis for deviation propagation paths for subsequent consistency analysis.

[0118] When performing conductor height continuity verification based on the verification state mapping table, the adjusted conductor height status of all positions is first read sequentially according to the unified line distance coordinates. The conductor height variation relationship within the same phase insulator from the positioning point to the midpoint and then to the boundary position is analyzed, as well as the conductor height connection relationship on both sides of the common boundary position between adjacent phase insulators. Further analysis is then performed on the conductor height transition relationship between the beginning of the phase separation zone and the preceding contact network structure, and between the end and the following contact network structure. Based on this, first-order and second-order difference analyses are performed on the continuous conductor height variation across the entire section to generate a conductor height continuity characterization sequence. Here, conductor height continuity verification refers to the evaluation of whether the adjusted conductor height distribution remains continuous, smooth, and free of abnormal peaks and valleys in space. The conductor height continuity characterization sequence refers to the sequence of continuous results characterizing the conductor height differences, rate of change, and curvature changes between each sampling position. The conductor height continuity characterization value can be expressed as:

[0119]

[0120] in, This represents the continuity characterization value of the guide height at the i-th position, which is used to comprehensively characterize the continuity level of this position in terms of adjacent guide height changes and local bending changes; This represents the actual guide height value after adjustment at the i-th position; This represents the actual guide height value after adjustment at position i+1; Indicates the first The actual guide height value after position adjustment; the first item is used to characterize the guide height difference between adjacent positions, the smaller the value, the smoother the change between positions; the second item is used to characterize the local curvature change, the smaller the value, the weaker the local peaks and valleys and slope transitions. and These represent the weighting coefficients of adjacent difference terms and local bending terms, respectively. By simultaneously constraining the first-order and second-order changes in elevation, this expression can identify elevation jumps, slope abrupt changes, and local peak-valley residual points, thus forming a complete sequence of elevation continuity representations.

[0121] When performing pantograph-catenary dynamic consistency verification based on pantograph-catenary relationship data, the corresponding pantograph-catenary relationship data is first extracted around the pantograph entry position, boundary crossing position, continuous current collection position in the middle, and end release position. The adjusted conductor height state is then mapped onto the pantograph's dynamic passage path. Next, the contact continuity state, impact change state, offline tendency state, and transition synchronization state at each key current collection position are analyzed to generate a pantograph-catenary dynamic response sequence. Here, pantograph-catenary dynamic consistency verification refers to the dynamic operational verification of whether the adjusted conductor height state can maintain consistency with the pantograph's dynamic passage requirements. The pantograph-catenary dynamic response sequence refers to the sequence of pantograph-catenary dynamic response strength and dynamic stability states at each key current collection position recorded along a unified line distance coordinate. The pantograph-catenary dynamic response value can be expressed as:

[0122]

[0123] in, The dynamic response value of the pantograph-catenary system at the j-th critical current collection location is used to comprehensively characterize the dynamic stability level of this critical location in terms of contact state, decoupling tendency, impact degree, and transition synchronicity. This represents the actual contact state characterization value of the j-th critical flow receiving location; This represents the reference contact state characterization value for the j-th critical flow receiving location; This represents the offline tendency characteristic of the j-th key receiving location; This represents the dynamic impact characteristic of the j-th critical flow-receiving location; The transition synchronization deviation characterization quantity represents the j-th critical flow receiving position; , , as well as These represent the weighting coefficients of contact deviation, offline tendency, dynamic impact, and transition synchronization deviation in the overall dynamic response. This expression unifies the representation of multiple dynamic factors at key flow receiving locations, enabling the dynamic consistency level of these locations to be invoked and compared in a single sequence.

[0124] When performing a linkage consistency analysis on the pantograph-catenary dynamic response sequence, guide height continuity characterization sequence, and deviation propagation diagram, the regulation deviation state, guide height continuity state, and pantograph-catenary dynamic response state corresponding to the same location are first aggregated according to a unified location identifier. Then, based on the deviation propagation direction, common boundary propagation path, and key current-collecting coupling path recorded in the deviation propagation diagram, the causal relationship or enhanced coupling relationship between different anomalies is analyzed. If a location simultaneously exhibits an over-limit deviation state, a large guide height continuity characterization value, and a high pantograph-catenary dynamic response value, it is determined that the location belongs to a strongly coupled anomaly location. If a location has a low regulation deviation but a persistently high guide height continuity characterization value and pantograph-catenary dynamic response value, it is determined that the location belongs to a location with insufficient structural smoothness. If a location has a normal guide height continuity state but an abnormal pantograph-catenary dynamic response, it is determined that the location belongs to a dynamically sensitive anomaly location. Subsequently, the above analysis results are used to form a dynamic consistency judgment map according to the location distribution and propagation path. The linkage consistency analysis here refers to the analytical process of jointly associating, jointly attributing, and jointly judging the three types of verification results; the dynamic consistency judgment map refers to the map structure that characterizes the comprehensive consistency level of each location in the phase separation zone in three dimensions: regulation achievement, spatial continuity, and dynamic current intake. In specific implementation, the three types of indicators at the same location can be standardized to form a consistency feature vector, and then combined with the edge relationships of the deviation propagation map for clustering or hierarchical discrimination, so that the map not only shows the abnormal location, but also the abnormal propagation direction and the degree of abnormal coupling.

[0125] When performing preset condition judgment processing based on the dynamic consistency judgment map, preset conditions are first set for the individual phase insulator level and the entire phase region level. At the individual phase insulator level, the adjustment deviation characterization values ​​of its positioning point and midpoint positions are required to be within the allowable deviation range, the conductor height continuity characterization value at the boundary position is lower than the continuity threshold, and the pantograph-catenary dynamic response value at the critical current collection position is lower than the dynamic threshold. At the entire phase region level, there are no strongly coupled abnormal positions, no continuously distributed over-limit deviation propagation paths, no cross-regional boundary irregularity dominant sections, and no continuous dynamic instability sections at the critical current collection positions. Only when the above requirements are met simultaneously at both the individual level and the entire region level is the overall negative sag adjustment determined to have reached the output condition, and the adjusted conductor height data, adjusted negative sag state, boundary connection state, critical current collection state, adjustment deviation state, conductor height continuity state, and pantograph-catenary dynamic consistency state are uniformly summarized into the overall negative sag adjustment result. The preset condition judgment processing here refers to the processing of making a final judgment on the overall adjustment effect based on the pre-set adjustment achievement conditions, continuity conditions, and dynamic stability conditions. The overall slack adjustment result refers to the output result obtained by uniformly encapsulating the adjustment results after satisfying preset conditions. The overall achievement judgment function can be expressed as:

[0126]

[0127] Where Z represents the overall achievement judgment value of the phase separation zone, which is used to comprehensively characterize the overall achievement level of three dimensions: adjustment deviation, guide height continuity and pantograph-catenary dynamic consistency; This represents the overall deviation achievement index obtained based on the statistical values ​​of the adjustment deviation characterization value. The higher the value, the closer the actual adjustment result is to the target adjustment result. This represents the continuity achievement index of the entire region obtained from the statistical analysis of the continuity characterization sequence of the guide height. The higher the value, the smoother the transition of the guide height in the entire region. This represents the overall dynamic consistency achievement index obtained based on the pantograph-catenary dynamic response sequence statistics. The higher the value, the more stable the dynamic passage of key flow receiving locations throughout the region. , as well as These represent the weighting coefficients of the three dimensions in the overall achievement determination. This expression unifies and aggregates the three types of achievement indicators to determine whether the overall negative sag adjustment in the phase split region has reached an output-ready state; when... When the preset comprehensive threshold is met, and the constraints at both the individual unit level and the overall area level are simultaneously satisfied, the overall negative sag adjustment result can be output. During output, adjustment completion, stability level, and key verification indicators can be added to each phase insulator, so that the final result not only indicates that the current adjustment has been achieved, but also provides a direct basis for subsequent operation and maintenance verification and periodic comparison.

[0128] This embodiment also discloses a device for adjusting the overall sag of an AC / DC converter, referring to... Figure 3 The device includes an acquisition module 301, a processing module 302, and an output module 303. It is used to execute any of the above-described methods for adjusting the overall sag of an AC / DC converter, wherein: The acquisition module 301 is used to acquire spatial layout data, positioning point guide height data, midpoint guide height data and pantograph-catenary relationship data corresponding to each phase insulator in the phase separation zone, forming a basic state set of the phase separation zone. Processing module 302 is used to construct an overall conductor height relationship chain based on the basic state set of the phase separation region and generate a negative sag distribution sequence; Processing module 302 is used to perform structural constraint correction and force consistency correction on the negative sag distribution sequence to form a corrected negative sag distribution sequence; Processing module 302 is used to construct a cross-phase region conduction height transition model based on the modified negative sag distribution sequence, and perform overall fitting processing to form the overall negative sag target curve of the phase region; The processing module 302 is used to generate, in reverse, the target positioning point guide height correction amount and the target midpoint guide height correction amount corresponding to each phase insulator based on the overall negative sag target curve of the phase separation area, so as to construct an overall adjustment parameter set. The output module 303 is used to perform coordinated adjustment control on each phase insulator according to the overall adjustment parameter set, perform verification based on the adjusted conductor height data and pantograph-catenary relationship data, and output the overall negative sag adjustment result when the preset conditions are met.

[0129] It should be noted that the above embodiments of the apparatus are only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0130] This embodiment also discloses an electronic device, referring to... Figure 4 The electronic device may include: at least one processor 401, at least one communication bus 402, user interface 403, network interface 404, and at least one memory 405.

[0131] The communication bus 402 is used to enable communication between these components.

[0132] The user interface 403 may include a display screen and a camera. Optionally, the user interface 403 may also include a standard wired interface and a wireless interface.

[0133] The network interface 404 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0134] The processor 401 may include one or more processing cores. The processor 401 connects to various parts of the server using various interfaces and lines, and performs various server functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in memory 405, and by calling data stored in memory 405. Optionally, the processor 401 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 401 may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content required for display; and the modem handles wireless communication. It is understood that the modem may also be implemented as a separate chip without being integrated into the processor 401.

[0135] The memory 405 may include random access memory (RAM) or read-only memory. Optionally, the memory may include a non-transitory computer-readable storage medium. The memory 405 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 405 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above-described method embodiments, etc.; the data storage area may store data involved in the above-described method embodiments, etc. Optionally, the memory 405 may also be at least one storage device located remotely from the aforementioned processor 401. As a computer storage medium, the memory 405 may include an operating system, a network communication module, a user interface 403 module, and an application program for adjusting the overall slack of an AC / DC converter.

[0136] exist Figure 4In the electronic device shown, the user interface 403 is mainly used to provide an input interface for the user and to obtain the user input data; while the processor 401 can be used to call the application program stored in the memory 405 for adjusting the overall sag of the AC-DC converter. When executed by one or more processors 401, the electronic device performs one or more of the methods described in the above embodiments.

[0137] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps can be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0138] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0139] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some service interface; the indirect coupling or communication connection between apparatuses or units may be electrical or other forms.

[0140] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0141] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0142] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory 405 and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned memory 405 includes various media capable of storing program code, such as a USB flash drive, external hard drive, magnetic disk, or optical disk.

[0143] The present invention also discloses a non-transitory computer-readable storage medium storing instructions. When executed by one or more processors 401, these instructions cause an electronic device to perform one or more methods as described in the above embodiments.

[0144] The above are merely exemplary embodiments of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of other embodiments of this disclosure upon considering the specification and the disclosure of practical truths. This invention is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described in this disclosure. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A method for adjusting the overall sag of an AC / DC converter, characterized in that, The method includes: Acquire spatial layout data, positioning point elevation data, midpoint elevation data, and pantograph-catenary relationship data for each phase insulator in the phase separation zone to form a basic state set for the phase separation zone; Based on the basic state set of the phase separation region, an overall guide height relationship chain is constructed to generate a negative sag distribution sequence; Structural constraint correction and force consistency correction are performed on the negative sag distribution sequence to form a corrected negative sag distribution sequence; Based on the modified negative sag distribution sequence, a cross-phase region conduction height transition model is constructed, and an overall fitting process is performed to form the overall negative sag target curve of the phase region. Based on the overall negative sag target curve of the phase separation region, the target positioning point guide height correction amount and target midpoint guide height correction amount corresponding to each phase insulator are generated in reverse to construct the overall adjustment parameter set. Based on the overall adjustment parameter set, coordinated adjustment control is performed on each phase insulator. Verification is performed based on the adjusted conductor height data and pantograph-catenary relationship data, and the overall negative sag adjustment result is output when the preset conditions are met.

2. The method for adjusting the overall sag of an AC / DC converter according to claim 1, characterized in that, The process of constructing an overall guide height relationship chain based on the basic state set of the phase separation region and generating a negative sag distribution sequence specifically includes: The spatial layout data is parsed sequentially to obtain the phase insulator sequence identifiers and establish spatial sequence relationships; The positioning point guide height data and the midpoint guide height data are bound according to the phase insulator sequence identifier to form a guide height attribute pair and construct a guide height distribution benchmark. Based on the aforementioned conductor height distribution benchmark, the difference calculation and normalization mapping are performed on each phase insulator to generate local negative sag characterization values ​​and form a local negative sag point set; Based on the spatial sequence relationship, neighborhood association processing and dynamic weight adjustment processing are performed on the local negative sag point set to form a negative sag association sequence; Spatial interpolation and smoothing are performed on the negative sag correlation sequence to form a continuous negative sag function expression; Discrete sampling is performed on the continuous negative sag function expression to generate the negative sag distribution sequence.

3. The method for adjusting the overall sag of an AC / DC converter according to claim 1, characterized in that, The process of performing structural constraint correction and force consistency correction on the negative sag distribution sequence to form a corrected negative sag distribution sequence specifically includes: The negative sag distribution sequence is associated with the suspension structure parameters, support positioning parameters, contact wire tension parameters, catenary tension parameters, and pantograph-catenary relationship data to form a constraint mapping relationship. Based on the constraint mapping relationship, the location constraint points, suspension transition points, phase separation zone boundary points, and mid-span response points are identified, and a structural boundary chain is constructed to divide the local correction sections. Structural constraint deviation detection is performed on the local correction section to identify negative sag abrupt change points, boundary mismatch points, and transition imbalance points, forming a set of structural deviation identifiers; Structural constraint corrections are performed based on the aforementioned set of structural deviation identifiers to form an intermediate negative sag distribution sequence; Based on the intermediate negative sag distribution sequence, contact wire tension parameters, and load-bearing cable tension parameters, a force transmission relationship chain is constructed and a force response sequence is generated. Based on the force response sequence, identify the force change point, tension imbalance point, and transmission reversal point, and perform force consistency correction processing. The corrected negative sag value is subjected to continuous verification and linked iteration to generate the corrected negative sag distribution sequence.

4. The method for adjusting the overall sag of an AC / DC converter according to claim 1, characterized in that, The process of constructing a cross-phase region conduction height transition model based on the modified negative sag distribution sequence and performing overall fitting processing to form the overall negative sag target curve of the phase region specifically includes: Perform coordinate registration between the modified negative sag distribution sequence and the basic state set of the phase region to construct a cross-phase region position index chain; Based on the cross-phase region position index chain, identify the guide height connection segment, guide height change segment, and boundary transition segment, and construct segment guide height association unit; Based on the segment guide height association unit, a segment guide height baseline is established, and a segment guide height offset sequence is generated; Based on the section guide height offset sequence, guide height continuity constraints, guide height slope continuity constraints, boundary connection constraints, local peak suppression constraints, and pantograph-catenary sensitive area smoothness constraints are extracted to form a cross-phase zone guide height transition constraint set; Based on the segmental guide height offset sequence, the cross-phase region guide height transition constraint set, and the dynamic smoothness enhancement weight field, an overall fitting objective function is constructed and an overall fitting process is performed to obtain the fitting result. The dynamic smoothness enhancement weight field is constructed based on the bow-catenary relationship data. The fitting results are superimposed with the segmental guide height baseline to form a guide height transition surface expression across the phase separation region, and the overall negative sag target curve of the phase separation region is extracted.

5. The method for adjusting the overall sag of an AC / DC converter according to claim 1, characterized in that, The step involves generating, in reverse, the target positioning point guide height correction and the target midpoint guide height correction for each phase insulator based on the overall negative sag target curve of the phase separation region, to construct an overall adjustment parameter set, specifically including: The overall negative sag target curve of the phase split region is aligned with the basic state set of the phase split region, the suspension structure parameters and the support positioning parameters to extract the target negative sag benchmark value. A local guide height inverse solution unit is constructed based on the target negative sag reference value, the positioning point guide height data, and the midpoint guide height data; Based on the local guide height inverse solution unit, the target midpoint guide height is solved in reverse to generate the target midpoint guide height value; Based on the target midpoint elevation value and the target negative sag reference value, perform reverse calculation of the target positioning point elevation to generate the target positioning point elevation value; The difference between the target positioning point elevation value and the positioning point elevation data is compared to generate the target positioning point elevation correction amount, and the difference between the target midpoint elevation value and the midpoint elevation data is compared to generate the target midpoint elevation correction amount. Map the target positioning point elevation correction amount and the target midpoint elevation correction amount to the physical adjustment domain corresponding to the suspension structure parameters and the support positioning parameters to generate structural adjustment components; Based on the target positioning point elevation correction amount, the target midpoint elevation correction amount, and the structural adjustment components, an overall adjustment parameter set is constructed.

6. The method for adjusting the overall sag of an AC / DC converter according to claim 5, characterized in that, The coordinated adjustment control of each phase insulator based on the overall adjustment parameter set specifically includes: The overall set of adjustment parameters is combined with spatial layout data, suspension structure parameters, support positioning parameters, contact wire tension parameters, catenary tension parameters, and pantograph-catenary relationship data to perform control mapping processing to establish a control mapping relationship. Based on the control mapping relationship and the segment priority identifier, the sequence arrangement is adjusted to form a coordinated adjustment sequence and a linkage adjustment unit is constructed. Based on the aforementioned coordination and adjustment sequence, the positioning parameters are pre-adjusted to form a positioning point elevation support state; Based on the structural adjustment components and the suspension structure parameters, suspension transmission adjustment is performed to drive the midpoint guide height to converge toward the target midpoint guide height state. Based on the linkage adjustment unit, conduction height linkage coordination is performed to achieve conduction height coupling adjustment between adjacent phase insulators; Force synchronization control is performed by combining the contact wire tension parameters and the catenary tension parameters to maintain a consistent force transmission chain. Based on the pantograph-catenary relationship data, dynamic correction processing is performed to optimize the guide height variation state at key flow collection locations; The adjusted guide height data is reconstructed to generate an adjusted guide height distribution sequence and an adjusted negative sag characterization sequence.

7. The method for adjusting the overall sag of an AC / DC converter according to claim 1, characterized in that, The verification is performed based on the adjusted guide height data and pantograph-catenary relationship data, and the overall negative sag adjustment result is output when preset conditions are met. Specifically, this includes: For the adjusted guide height data, boundary connection location data, key current collection location data, and pantograph-catenary relationship data, registration is performed to construct a verification status mapping table; Based on the aforementioned verification state mapping table, the overall negative sag target curve of the phase region, the overall adjustment parameter set, and the negative sag distribution sequence before adjustment, a verification reference relationship is formed by performing target association. Perform adjustment deviation verification on the aforementioned verification reference relationship to generate adjustment deviation characterization values; The adjustment deviation characterization value is subjected to deviation grading and judgment processing, and a deviation propagation diagram is constructed; Based on the verification state mapping table, perform guide height continuity verification to generate a guide height continuity representation sequence; Based on the pantograph-catenary relationship data, perform pantograph-catenary dynamic consistency verification processing to generate a pantograph-catenary dynamic response sequence; Perform a linkage consistency analysis on the pantograph-catenary dynamic response sequence, the guide height continuity characterization sequence, and the deviation propagation diagram to construct a dynamic consistency determination map; Based on the dynamic consistency determination map, a preset condition determination process is performed, and the overall negative sag adjustment result is output when the preset conditions are met.

8. A device for adjusting the overall sag of an AC / DC converter, characterized in that, The device is used to perform a method for adjusting the overall sag of an AC / DC converter as described in any one of claims 1-7. The device includes an acquisition module, a processing module, and an output module, wherein: The acquisition module is used to acquire spatial layout data, positioning point guide height data, midpoint guide height data and pantograph-catenary relationship data corresponding to each phase insulator in the phase separation zone, forming a basic state set of the phase separation zone. The processing module is used to construct an overall guide height relationship chain based on the basic state set of the phase separation region and generate a negative sag distribution sequence; The processing module is used to perform structural constraint correction and force consistency correction on the negative sag distribution sequence to form a corrected negative sag distribution sequence; The processing module is used to construct a cross-phase region conduction height transition model based on the modified negative sag distribution sequence, and perform overall fitting processing to form the overall negative sag target curve of the phase region. The processing module is used to generate, in reverse, the target positioning point guide height correction amount and the target midpoint guide height correction amount corresponding to each phase insulator based on the overall negative sag target curve of the phase separation region, so as to construct an overall adjustment parameter set. The output module is used to perform coordinated adjustment control on each phase insulator according to the overall adjustment parameter set, perform verification based on the adjusted conductor height data and pantograph-catenary relationship data, and output the overall negative sag adjustment result when the preset conditions are met.

9. An electronic device, characterized in that, The device includes a processor, a communication bus, a user interface, a network interface, and a memory. The memory is used to store instructions. The user interface and the network interface are both used to communicate with other devices. The communication bus is used to enable communication between the components within the electronic device. The processor is used to execute the instructions stored in the memory to cause the electronic device to perform the method as described in any one of claims 1-7.

10. A non-transitory computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed, perform the method as described in any one of claims 1-7.

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