Double-breakpoint rotary contact isolating switch

Abstract

The invention relates to the technical field of disconnecting switches, and provides a double-breakpoint rotary contact disconnecting switch, and a performance analysis method of the double-breakpoint rotary contact disconnecting switch comprises the steps: obtaining operation maintenance information; obtaining a fault conduction diagram based on the operation maintenance information; wherein the fault conduction diagram comprises a starting node, a termination node, at least one intermediate node, at least two conduction directions and conduction weights corresponding to the conduction directions; obtaining a first performance index and at least one second performance index based on the fault conduction diagram; and obtaining an analysis result based on the first performance index and the second performance index. According to the double-breakpoint rotary contact isolation switch provided by the invention, the technical problem that the isolation switch opening reliability and the operation and maintenance efficiency cannot be effectively improved because the influence degree of each fault factor on the reliability of the opening process is difficult to quantify under the scene of coexistence of various types of abnormal fault factors in the prior art can be solved.

Description

Technical Field

[0001] This application relates to the field of disconnector technology, and in particular to a double-break rotary contact disconnector. Background Technology

[0002] The double-break rotary contact disconnector is a high-voltage switchgear used in power systems to achieve circuit isolation and on / off control. Its core feature is the use of a double-break contact structure and a rotary operating mechanism, that is, the rotating movement of the contact assembly enables the moving and stationary contacts to simultaneously open or close the circuit at two separation points.

[0003] However, during the process of switching from the closed conducting state to the open isolation state, there are multiple abnormal fault factors coexisting in the double-break rotary contact disconnector. Traditional analysis methods are difficult to quantify the impact of each fault factor on the reliability of the opening process, resulting in inaccurate location of key fault factors and lack of targeted operation and maintenance, which in turn cannot effectively improve the opening reliability and operation and maintenance efficiency of the disconnector. Summary of the Invention

[0004] This application provides a double-break rotary contact disconnector, which can improve the technical problem in related technologies where it is difficult to quantify the impact of each fault factor on the reliability of the tripping process in scenarios where multiple abnormal fault factors coexist. This leads to inaccurate location of key fault factors and a lack of targeted operation and maintenance, thus failing to effectively improve the tripping reliability and operation and maintenance efficiency of the disconnector.

[0005] In a first aspect, embodiments of this application provide a double-break rotary contact isolating switch, comprising: Install the housing; A rotary operating part is rotatably mounted on the mounting housing, and the rotary operating part has two movable contacts; wherein Two stationary contact assemblies are disposed on the mounting housing, and the stationary contact assemblies have stationary contacts; The rotating operating part is used to rotate so that the two moving contacts respectively come into contact with the two stationary contacts to form a conductive path.

[0006] The technical solutions described in this application embodiment have at least the following technical effects: The double-break rotary contact disconnector provided in this application embodiment, during the closing and conducting phase, rotates the rotary operating part to drive the two moving contacts to synchronously approach their corresponding stationary contacts. When the rotary operating part rotates to the limit position, the two moving contacts are in close contact with the two stationary contacts, forming two parallel conductive paths (double-break closure), and the circuit is connected. During the opening and isolating phase, the rotary operating part rotates in the opposite direction, and the two moving contacts synchronously separate from the stationary contacts. When the rotary operating part rotates to the opening limit position, the distance between the moving contacts and the stationary contacts reaches the safe isolation distance, the circuit is completely isolated, and the opening process is completed.

[0007] In a second aspect, embodiments of this application provide a performance analysis method for a double-break rotary contact disconnector, used to analyze the double-break rotary contact disconnector described in the first aspect above, the method comprising: Obtain operation and maintenance information; wherein, the obtained operation and maintenance information includes operation and maintenance data of the double-break rotary contact disconnector and at least one abnormal fault factor, the abnormal fault factor reflecting an abnormality in the switching of the double-break rotary contact disconnector from the closed conduction state to the open isolation state; A fault transmission diagram is obtained based on the operation and maintenance information; wherein, the fault transmission diagram includes a starting node, an ending node, at least one intermediate node, at least two transmission directions and the corresponding transmission weights for each of the transmission directions, and the fault transmission diagram reflects the state of the double-break rotary contact disconnector during the process of switching from the closed conduction state to the open isolation state; Based on the fault transmission diagram, a first performance index and at least one second performance index are obtained; wherein, the first performance index and the second performance index reflect the probability that the double-break rotary contact disconnector normally switches from the closed conduction state to the open isolation state, and the second performance index corresponds to the abnormal fault factor; The analysis results are obtained based on the first performance index and the second performance index.

[0008] The technical solutions described in this application embodiment have at least the following technical effects: By collecting multi-dimensional operation and maintenance information of the double-break rotary contact disconnector, specifically including full-cycle operation and maintenance data reflecting the disconnector's operating status (such as tripping operation sequence data, contact action parameters, electrical characteristic data, etc.), and at least one abnormal fault factor directly related to tripping anomalies (this abnormal fault factor characterizes various abnormal scenarios that occur during the disconnector's transition from the closed conducting state to the open isolating state (such as contact jamming, transmission mechanism failure, insulation performance degradation, etc.), data support is provided for subsequent steps. A fault transmission diagram reflecting the state evolution during the tripping process is constructed based on the collected operation and maintenance information to achieve visualization and quantitative modeling of the fault generation, propagation, and impact paths during tripping. Based on the constructed fault transmission diagram, a first performance index reflecting the tripping reliability of the disconnector and at least one second performance index are calculated. Differentiated index design achieves dual quantification of overall reliability and the impact of individual fault factors. By comparing, calculating, weighting, and logically analyzing the first performance indicator (overall reliability) and each second performance indicator (reliability corresponding to a single fault factor), the impact of each abnormal fault factor on the tripping reliability is quantified. The final analysis results can clearly define the fault priority, providing operation and maintenance personnel with targeted handling basis, which is conducive to quickly locating key fault points, optimizing operation and maintenance strategies, and improving the tripping reliability and operation and maintenance efficiency of disconnecting switches. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of the double-break rotary contact isolating switch provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the double-break rotary contact disconnector after removing the arc-extinguishing component, as provided in the embodiment of this application. Figure 3 A flowchart illustrating the performance analysis method for a double-break rotary contact disconnector provided in this application embodiment; Figure 4 A flowchart illustrating step S200 in the performance analysis method for a double-break rotary contact disconnector provided in this application embodiment; Figure 5 This is a flowchart illustrating step S221 in the performance analysis method for a double-break rotary contact disconnector provided in this application embodiment. Figure 6A flowchart illustrating step S224 in the performance analysis method for a double-break rotary contact disconnector provided in this application embodiment; Figure 7 A flowchart illustrating step S300 in the performance analysis method for a double-break rotary contact disconnector provided in this application embodiment.

[0011] The following are the labeling elements in the figure: 100. Double-break rotary contact disconnector; 10. Mounting housing; 20. Rotary operating part; 21. Rotating part; 22. Moving contact assembly; 23. Rotary drive device; 30. Stationary contact assembly; 31. Stationary contact; 32. Arc extinguishing assembly. Detailed Implementation

[0012] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0014] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0015] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0016] 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 number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0017] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0018] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0019] The double-break rotary contact disconnector is a high-voltage switchgear used in power systems to achieve circuit isolation and on / off control. Its core feature is the use of a double-break contact structure and a rotary operating mechanism, that is, the rotating movement of the contact assembly enables the moving and stationary contacts to simultaneously open or close the circuit at two separation points.

[0020] However, during the process of switching from the closed conducting state to the open isolation state, there are multiple abnormal fault factors coexisting in the double-break rotary contact disconnector. Traditional analysis methods are difficult to quantify the impact of each fault factor on the reliability of the opening process, resulting in inaccurate location of key fault factors and lack of targeted operation and maintenance, which in turn cannot effectively improve the opening reliability and operation and maintenance efficiency of the disconnector.

[0021] Based on this, in order to improve the technical problem in related technologies that it is difficult to quantify the impact of each fault factor on the reliability of the tripping process in scenarios where multiple abnormal fault factors coexist, resulting in inaccurate location of key fault factors and lack of targeted operation and maintenance, and thus failing to effectively improve the reliability of disconnecting switch tripping and operation and maintenance efficiency, the embodiments of this application provide the following solutions.

[0022] Please see Figure 1 This application provides a double-break rotary contact disconnector 100, which includes a mounting housing 10, a rotary operating part 20, and two stationary contact assemblies 30, wherein: The rotary operating part 20 is rotatably mounted on the mounting housing 10, and the rotary operating part 20 has two moving contacts.

[0023] Two stationary contact assemblies 30 are disposed on the mounting housing 10, and each stationary contact assembly 30 has a stationary contact.

[0024] The rotary operating part 20 is used to rotate so that the two moving contacts come into contact with the two stationary contacts respectively to form a conductive path.

[0025] It is understood that the mounting housing 10 provides a stable mounting and positioning reference for the rotary operating part 20 and the stationary contact assembly 30, ensuring the relative positional accuracy of each component. For example, the mounting housing 10 may be integrally molded from a high-strength insulating material, but is not limited to this.

[0026] The rotary operating unit 20 rotates to move two moving contacts synchronously closer to or further away from the stationary contact, thus completing circuit connection or isolation. For example, the rotary operating unit 20 may include a rotary drive structure and a moving contact integrated structure. The rotary drive structure can be rotatably connected to the mounting housing 10 via bearings, and a connection interface for a rotary drive device 23 (such as an electric operating mechanism or a manual crank) is provided to achieve electric or manual dual-mode operation. The moving contact integrated structure can be disposed on the rotary drive structure and is driven to rotate by the rotary drive structure to move the two moving contacts synchronously closer to or further away from the stationary contact. The two moving contacts can be symmetrically disposed at both ends of the moving contact integrated structure. The moving contact integrated structure can be made of conductive copper alloy material, but is not limited to this.

[0027] Two stationary contact assemblies 30 are symmetrically arranged and cooperate with the double moving contacts to form the core contact point for circuit conduction, while also providing a basis for bearing and extinguishing the opening arc. For example, the stationary contact assembly 30 may include a stationary contact structure and an arc-extinguishing grid. The stationary contact structure is disposed on the mounting housing 10 and has a stationary contact. It may be made of conductive silver-tungsten alloy material, but is not limited to this.

[0028] As can be seen from the above, the double-break rotary contact isolating switch 100 provided in this application embodiment, during the closing and conducting phase, drives the two moving contacts to synchronously approach the corresponding stationary contacts through the rotation of the rotary operating part 20. When the rotary operating part 20 rotates to the limit position, the two moving contacts are in close contact with the two stationary contacts respectively, forming two parallel conductive paths (double-break closure), and the circuit is connected. During the opening and isolating phase, the rotary operating part 20 rotates in the opposite direction, and the two moving contacts synchronously separate from the stationary contacts. When the rotary operating part 20 rotates to the opening limit position, the distance between the moving contacts and the stationary contacts reaches the safe isolation distance, the circuit is completely isolated, and the opening process is completed.

[0029] In some embodiments, please refer to the following: Figure 1 and Figure 2 The rotary operating unit 20 includes a rotating component 21, a moving contact assembly 22, and a rotary drive device 23.

[0030] The rotating component 21 is rotatably mounted on the mounting and receiving component 10.

[0031] The moving contact assembly 22 is disposed on the rotating member 21, and the moving contact assembly 22 has two moving contacts.

[0032] A rotary drive device 23 is mounted on the mounting housing 10.

[0033] The rotary drive device 23 is used to drive the rotating component 21 to rotate so as to drive the moving contact assembly 22 to rotate, thereby separating or contacting the moving contact with the stationary contact.

[0034] It is understood that the rotating component 21 is the mounting base and motion core of the moving contact assembly 22, responsible for converting the driving power into synchronous rotational motion of the two moving contacts, ensuring consistent operation. For example, the rotating component 21 can be integrally formed from high-strength alloy steel or insulating composite material, but is not limited to these.

[0035] The moving contact assembly 22 is the direct actuator for switching the circuit on and off. It integrates two moving contacts to ensure reliable contact and separation with the stationary contact. For example, the moving contact assembly 22 can be made of conductive silver-tungsten alloy. The two moving contacts can be symmetrically arranged at both ends of the moving contact assembly 22. Each moving contact can be equipped with an independent elastic mechanism (such as a disc spring) to adjust the contact pressure with the stationary contact and absorb rotational impact and compensate for contact wear.

[0036] The rotary drive unit 23 is responsible for providing controllable and stable rotational power, and can support both electric and manual operation modes. For example, the rotary drive unit 23 can be a servo motor, a stepper motor, etc., and can also be equipped with a manual crank interface, which can achieve manual operation by switching between the clutch and the electric drive structure, thereby adapting to emergency opening and closing scenarios. The rotary drive unit 23 may also include a torque sensor and an angle encoder to detect torque changes and rotation angle data in real time.

[0037] With this configuration, during the closing and conduction phase, the rotary drive device 23 receives the closing command and drives the rotating component 21 to rotate, causing the moving contact assembly 22 to move synchronously with the rotating component 21. The two moving contacts gradually approach the corresponding stationary contacts. When the moving contact assembly 22 rotates to the limit position, the moving contact and the stationary contact are in complete contact. The elastic mechanism provides stable contact pressure to form a double-break conductive path, and the closing is completed.

[0038] During the tripping isolation phase, after receiving the tripping command, the rotary drive device 23 drives the rotary component 21 to rotate in the opposite direction, so that the moving contact assembly 22 moves synchronously with the rotary component 21, and the two moving contacts separate synchronously from the stationary contacts. When the rotary component 21 rotates to the tripping limit position, the distance between the moving contact and the stationary contact reaches the safe isolation distance, and the circuit is completely isolated.

[0039] In some embodiments, please refer to the following: Figure 1 and Figure 2 The stationary contact assembly 30 includes a stationary contact 31 and an arc extinguishing assembly 32.

[0040] The stationary contact 31 is disposed on the mounting and receiving member 10, and the stationary contact 31 has a stationary contact point.

[0041] Arc extinguishing assembly 32 is disposed on mounting housing 10. Arc extinguishing assembly 32 has an arc extinguishing groove, and stationary contact and moving contact are located in the arc extinguishing groove.

[0042] It is understandable that the stationary contact 31 is a key contact component for current transmission, responsible for forming a conductive path with the moving contact to ensure stable transmission of high-voltage current, while also withstanding the initial impact of the opening arc. For example, the stationary contact 31 can be made of conductive silver-tungsten alloy, copper alloy, etc., but is not limited to these.

[0043] The arc-extinguishing assembly 32 is the core component for extinguishing the arc during the opening process. It constrains the arc shape and accelerates arc cooling through the arc-extinguishing groove, ensuring rapid arc extinguishing and preventing damage to the contacts and surrounding components. For example, the arc-extinguishing assembly 32 can be integrally molded from ceramic or arc-resistant plastic, in a U-shaped or labyrinthine structure, but is not limited to these. Multiple arc-blocking grids can be provided within the arc-extinguishing groove to divide the arc into multiple short arcs, reducing the arc voltage. The arc-extinguishing groove encloses the stationary and moving contacts (the contacts are located within the arc-extinguishing groove), ensuring that the arc is completely confined within the groove after it is generated, preventing it from spreading to the interphase.

[0044] With this configuration, during the closing and conduction phase, the rotating operating unit 20 drives the moving contact to rotate and approach the stationary contact 31. The moving contact contacts the stationary contact in the arc-extinguishing groove, forming a conductive path.

[0045] During the arc extinguishing phase, the rotary operating unit 20 drives the moving contact to rotate in the opposite direction and separate from the stationary contact, generating a high-voltage arc between the contacts. Guided by the arc extinguishing groove, the arc is quickly introduced into the arc extinguishing groove. The arc barrier divides the arc into multiple short arcs, reducing the arc temperature and energy. At the same time, the material of the arc extinguishing groove absorbs the arc heat, accelerating the arc cooling. The gas generated by the arc combustion can be discharged to the outside through the exhaust port to avoid excessive pressure inside the groove. After the moving contact completely leaves the stationary contact, the arc is quickly extinguished in the arc extinguishing groove, completing the safe tripping.

[0046] Please see Figure 3 This application also provides a performance analysis method for a double-break rotary contact disconnector switch, used to analyze the performance of the double-break rotary contact disconnector switch 100 described above. The performance analysis method for the double-break rotary contact disconnector switch includes: Obtain operation and maintenance information; including operation and maintenance data of the double-break rotary contact disconnector and at least one abnormal fault factor, which reflects an abnormality in the switching of the double-break rotary contact disconnector from the closed conduction state to the open isolation state.

[0047] The fault transmission diagram is obtained based on the operation and maintenance information. The fault transmission diagram includes a starting node, an ending node, at least one intermediate node, at least two transmission directions, and the corresponding transmission weights for each transmission direction. The fault transmission diagram reflects the state of the double-break rotary contact disconnector switch during the process of switching from the closed conduction state to the open isolation state.

[0048] Based on the fault transmission diagram, a first performance index and at least one second performance index are obtained; wherein, the first performance index and the second performance index reflect the probability of the double-break rotary contact disconnector normally switching from the closed conduction state to the open isolation state, and the second performance index corresponds to the abnormal fault factors.

[0049] The analysis results are obtained based on the first and second performance indicators.

[0050] As can be seen from the above, the performance analysis method for a double-break rotary contact disconnector provided in this application collects multi-dimensional operation and maintenance information of the double-break rotary contact disconnector. Specifically, this includes full-cycle operation and maintenance data reflecting the disconnector's operating status (such as opening operation sequence data, contact action parameters, electrical characteristic data, etc.), and at least one abnormal fault factor directly related to the opening anomaly (this abnormal fault factor characterizes various abnormal scenarios that occur during the disconnector's transition from the closed conducting state to the open isolating state (such as contact jamming, transmission mechanism failure, insulation performance degradation, etc.)). This provides data support for subsequent steps. By constructing a fault transmission diagram reflecting the state evolution during the opening process based on the collected operation and maintenance information, visualization and quantitative modeling of the fault generation, propagation, and impact paths during the opening process are achieved. Based on the constructed fault transmission diagram, a first performance index reflecting the disconnector's opening reliability and at least one second performance index are calculated. Through differentiated index design, dual quantification of the overall reliability and the impact of individual fault factors is achieved. By comparing, calculating, weighting, and logically analyzing the first performance indicator (overall reliability) and each second performance indicator (reliability corresponding to a single fault factor), the impact of each abnormal fault factor on the tripping reliability is quantified. The final analysis results can clearly define the fault priority, providing operation and maintenance personnel with targeted handling basis, which is conducive to quickly locating key fault points, optimizing operation and maintenance strategies, and improving the tripping reliability and operation and maintenance efficiency of disconnecting switches.

[0051] To better understand the performance analysis method for a double-break rotary contact disconnector provided in this application, the specific implementation process of the performance analysis method for a double-break rotary contact disconnector provided in this application will be described below by way of example.

[0052] Figure 3 This illustration shows a schematic flowchart of a performance analysis method for a double-break rotary contact disconnector provided in an embodiment of this application. The performance analysis method for a double-break rotary contact disconnector includes: S100, Obtain operation and maintenance information; wherein, the obtained operation and maintenance information includes operation and maintenance data of the double-break rotary contact disconnector and at least one abnormal fault factor, the abnormal fault factor reflecting an abnormality in the switching of the double-break rotary contact disconnector from the closed conduction state to the open isolation state.

[0053] It is understandable that the operation and maintenance data of a double-break rotary contact disconnector includes operational status monitoring data, operation sequence data, and maintenance records throughout the entire life cycle of the disconnector. Specifically, it may include the timing sequence of the tripping operation trigger signal, contact rotation parameters, contact resistance, insulation performance monitoring data, historical maintenance and replacement records, and at least one of the environmental conditions (temperature, humidity, pollution level), comprehensively reflecting the basic status and historical operation and maintenance of the equipment. Abnormal fault factors reflect various abnormal scenarios that occur during the process of the disconnector switching from the closed conducting state to the open isolating state, such as contact jamming, wear or failure of the transmission mechanism, insufficient tripping driving force, flashover of insulation components, and asynchronous separation of moving and stationary contacts. Each abnormal fault factor corresponds to a type of fault mode in the tripping switching process.

[0054] Obtaining operation and maintenance information can be achieved through real-time online monitoring. This involves installing displacement sensors, force sensors, and electrical parameter monitoring modules on the disconnector switch body and transmission system to collect operational data such as the timing of tripping actions, contact status, and insulation performance in real time, while simultaneously capturing abnormal signals during the tripping process to identify fault factors. Alternatively, historical data can be retrieved from the power equipment operation and maintenance management platform and the equipment's full lifecycle archives. This allows for the extraction of historical operation records, maintenance reports, and fault handling ledgers, which are then used to filter out operation and maintenance data related to tripping and fault factors corresponding to past abnormal fault cases. By combining basic operational data with targeted fault factor information, a comprehensive and accurate data source is ensured for subsequent analysis.

[0055] In one possible implementation, the double-break rotary contact disconnector is unable to switch normally from the closed conduction state to the open isolation state due to at least one abnormal fault factor.

[0056] S200, based on operation and maintenance information, a fault transmission diagram is obtained; the fault transmission diagram includes a starting node, an ending node, at least one intermediate node, at least two transmission directions, and the corresponding transmission weights for each transmission direction. The fault transmission diagram reflects the state of the double-break rotary contact disconnector switch during the process of switching from the closed conduction state to the open isolation state.

[0057] It is understandable that the method of obtaining a fault transmission diagram based on operation and maintenance information can be as follows: using operation and maintenance information as the basis, defining the closed conduction state of the double-break rotary contact disconnector as the starting node and the open isolation state as the ending node, defining each abnormal fault factor as an intermediate node, and then extracting the corresponding operation characteristic parameters of each abnormal fault factor, splitting the operation and maintenance data into unit data, and statistically analyzing the number of associated fault samples and the number of co-occurrence samples. The fault transmission direction between adjacent nodes is determined based on the ratio of the number of co-occurrence samples to the number of associated fault samples of the corresponding node. Finally, the transmission weight of each transmission direction is quantified using this ratio, and a structured fault transmission diagram that can map the fault generation, propagation path and intensity during the process of switching the equipment from the closed conduction state to the open isolation state is constructed. However, this method is not limited to this.

[0058] Based on the collected operation and maintenance information of the double-break rotary contact disconnector (including full operation and maintenance data and targeted abnormal fault factors), a fault transmission diagram is constructed to characterize the fault propagation law during the opening process. The transmission direction is used to define the fault propagation path between adjacent nodes (such as the propagation direction from the starting node to the intermediate node, from the intermediate node to the intermediate node, and from the intermediate node to the ending node). Each transmission direction corresponds to a unique transmission weight (used to quantify the probability and intensity of fault propagation on that path). The fault transmission diagram can comprehensively and accurately reflect the state evolution logic of the double-break rotary contact disconnector from the closed conduction state to the open isolation state, and clearly present the complete link from the generation and propagation of the fault to its impact on the opening result.

[0059] In one possible implementation, please refer to Figure 4 S200, based on operation and maintenance information, obtains a fault transmission diagram, including: S210: The closed conduction state is confirmed as the starting node, the open isolation state is confirmed as the ending node, and each abnormal fault factor is confirmed as an intermediate node.

[0060] It is understandable that the core logic is based on the opening and closing process of the double-break rotary contact disconnector. The closing and conducting state of the disconnector is identified as the starting point of the fault propagation, and the opening and isolation state is identified as the ending point of the fault propagation. At the same time, each abnormal fault factor extracted from the operation and maintenance information is identified as an intermediate node in the fault propagation process, laying the foundation for clarifying the fault propagation path and quantifying the propagation intensity.

[0061] S220, based on operation and maintenance information, obtains the transmission direction and transmission weight; wherein, the receiving end of the transmission direction is connected to the starting node or intermediate node, the transmitting end of the transmission direction is connected to the terminating node or intermediate node, and the direction extending from the receiving end to the transmitting end reflects the fault propagation direction between two adjacent nodes.

[0062] It is understandable that obtaining the propagation direction and weight based on operation and maintenance information can be achieved by first extracting the disconnector switch operation characteristic parameters corresponding to each abnormal fault factor from the operation and maintenance information, splitting the operation and maintenance data into unit data at preset time intervals, and statistically analyzing the associated fault sample quantity for each intermediate node and the co-occurrence sample quantity between two adjacent intermediate nodes. Then, by calculating the ratio of the co-occurrence sample quantity to the associated fault sample quantity of the first node and the ratio of the co-occurrence sample quantity to the associated fault sample quantity of the second node, the node with the larger ratio is designated as the receiving end of the propagation direction, and the other node as the transmitting end (the receiving end is connected to the starting node or intermediate node, and the transmitting end is connected to the terminating node or intermediate node), thus determining the fault propagation direction between two adjacent nodes. Finally, the corresponding ratio is used as the propagation weight for that propagation direction, completing the dual determination of the propagation direction and weight, but this method is not limited to this. Obtaining the propagation direction and weight based on operation and maintenance information provides a basis for subsequent steps.

[0063] In one possible implementation, please refer to Figure 4 S220, based on operation and maintenance information, obtains the transmission direction and transmission weight, including: S221, based on operation and maintenance information, obtain the operating characteristic parameters of the disconnecting switch corresponding to each abnormal fault factor.

[0064] It is understandable that the way to obtain the disconnector operation characteristic parameters corresponding to each abnormal fault factor based on operation and maintenance information can be to first classify each abnormal fault factor by its fault type, filter out the same type of fault operation data related to that fault type from the operation and maintenance data to form a dedicated fault set, and then, for each fault set, determine whether the proportion of fault operation data that is greater than the corresponding preset fault threshold exceeds the preset proportion threshold; if the proportion meets the standard, the average value of this type of fault operation data exceeding the threshold is confirmed as the disconnector operation characteristic parameter corresponding to the abnormal fault factor, but it is not limited to this.

[0065] Based on the collected operation and maintenance information of the double-break rotary contact disconnector (including full-cycle operation data, fault records, and maintenance logs), targeted data screening and feature extraction are performed for each abnormal fault factor (such as contact oxidation and ablation, transmission mechanism jamming, and asynchronous operation of the double breaks). Finally, the disconnector operation characteristic parameters corresponding to each abnormal fault factor are obtained (precisely characterizing the difference in the operating state of the equipment when the fault factor occurs (such as contact jamming corresponding to contact movement displacement deviation, transmission mechanism wear corresponding to operating torque fluctuation value, and insulation abnormality corresponding to leakage current peak value, etc.)). This provides data support for subsequent fault sample statistics, conduction direction, and weight determination.

[0066] In one possible implementation, please refer to Figure 4 and Figure 5S221, Based on operation and maintenance information, obtain the operating characteristic parameters of the disconnecting switch corresponding to each abnormal fault factor, including: S2211, classify the operation and maintenance data according to the fault type of each abnormal fault factor to obtain at least one fault set corresponding to each abnormal fault factor; the fault set includes the same type of fault operation data related to the same fault type.

[0067] It is understandable that, based on the specific fault types of various abnormal fault factors (such as contact oxidation and ablation, transmission mechanism jamming, and asynchronous operation of double-break rotary contact disconnectors) of the double-break rotary contact disconnector, targeted classification processing is carried out on the full amount of operation and maintenance data collected in the early stage. For each abnormal fault factor, all fault operation data directly related to its fault type are screened out, and finally at least one exclusive fault set corresponding to each abnormal fault factor is formed. Each fault set contains only the same type of fault operation data under the same fault type, avoiding data mixing caused by cross-fault types, and ensuring that the subsequent extraction of feature parameters for each abnormal fault factor has reliable data source support.

[0068] In one possible implementation, if the fault type of the abnormal fault factor is a transmission mechanism jamming fault factor, then the operating torque data of the rotating operating part is extracted from the operation and maintenance data and confirmed as the fault operation data, and a fault set corresponding to the operating torque data is obtained.

[0069] And / or, if the fault type of the abnormal fault factor is the double-break point asynchronous operation fault factor, then the time difference data of the opening action of the two breaks of the disconnecting switch of each sample is extracted from the operation and maintenance data and confirmed as the fault operation data, and the fault set corresponding to the time difference data of the opening action is obtained.

[0070] And / or, if the fault type of the abnormal fault factor is the contact oxidation and ablation fault factor, then the contact resistance data of each sample disconnecting switch is extracted from the operation and maintenance data and confirmed as the fault operation data, and the fault set corresponding to the contact resistance data is obtained.

[0071] S2212, determine whether the proportion of fault operation data in each fault set that is greater than the corresponding preset fault threshold is greater than the preset proportion threshold. If the proportion of fault operation data in the fault set that is greater than the corresponding preset fault threshold is greater than the preset proportion threshold, then the average value of the fault operation data that is greater than the corresponding preset fault threshold is confirmed as the disconnector switch operation characteristic parameter.

[0072] It is understandable that, for each specific fault set corresponding to an abnormal fault factor, data validity verification is carried out one by one. First, the preset fault thresholds (calibrated based on fault type, disconnector design specifications, and engineering experience, used to define the effective range of fault-related data; for example, the preset fault threshold for an abnormal fault factor with asynchronous separation of moving and stationary contacts could be a separation time difference of less than 0.1s between the two breakpoints; the preset fault threshold for an abnormal fault factor with jamming of the transmission mechanism could be a numerical range formed by fluctuating 10% above or below the rated operating torque, etc., but not limited to these) and preset percentage thresholds (used to ensure the representativeness of characteristic parameters; for example, the preset percentage thresholds could be 60%, 70%, etc., but not limited to these) and preset percentage thresholds are calculated. Then, the proportion of fault operation data exceeding the corresponding preset fault threshold in each fault set is counted to the total data volume of the set. If this proportion is greater than the preset percentage threshold, it means that the data exceeding the threshold can fully reflect the operating characteristics of the fault factor. At this time, the average of all fault operation data exceeding the corresponding preset fault threshold is calculated, and the calculation result is confirmed as the disconnector operating characteristic parameter corresponding to the abnormal fault factor, ensuring that the extracted parameters can characterize the equipment operating status characteristics when the fault occurs.

[0073] S222: Extract operation and maintenance data at preset time intervals to obtain operation and maintenance unit data.

[0074] It is understandable that the preset time interval could be the past month, the past six months, etc., but is not limited to these. The continuous operation and maintenance data (including tripping action parameters, electrical performance data, fault monitoring data, etc.) throughout the entire cycle is segmented and extracted according to this time interval. Independent and well-organized operation and maintenance unit data are extracted from the continuous time-series data, ensuring that each operation and maintenance unit data includes complete operational status information within the corresponding time interval. This provides a structured and quantifiable data foundation for subsequent statistical analysis of the associated fault sample size of each abnormal fault factor and analysis of the co-occurrence relationship of adjacent fault factors, ensuring that the determination of fault propagation direction and weight has reliable time-series data support.

[0075] S223, count the number of fault data samples that match the operating characteristic parameters corresponding to each abnormal fault factor in the operation and maintenance unit data, and confirm the number of fault data samples corresponding to each abnormal fault factor as the associated fault sample quantity of the intermediate node corresponding to the abnormal fault factor.

[0076] It is understandable that, in the operation and maintenance unit data, for each abnormal fault factor, the operating parameters in the unit data are compared one by one with the corresponding operating characteristic parameters of that fault factor (such as the tripping action time threshold and the time difference between the two breaks corresponding to contact jamming, the operating torque fluctuation value corresponding to transmission mechanism wear, etc.). Fault-related data samples that perfectly match the characteristic parameter standards are then selected, and the total number of matching fault data samples corresponding to each abnormal fault factor in the operation and maintenance unit data is then counted. This statistical number is directly defined as the number of associated fault samples of the intermediate nodes associated with the corresponding abnormal fault factor, ensuring that subsequent analysis of transmission relationships based on sample size has reliable data support.

[0077] S224, respectively, determines the propagation direction and propagation weight corresponding to the two adjacent intermediate nodes based on the associated fault sample size of each of the two adjacent intermediate nodes.

[0078] It is understandable that the method of determining the transmission direction and transmission weight corresponding to two adjacent intermediate nodes based on the number of associated fault samples corresponding to each pair of adjacent intermediate nodes can be as follows: first, count the number of co-occurring samples in the operation and maintenance unit data that simultaneously contain two types of fault factors and match in time sequence; then, calculate the first analysis value (number of co-occurring samples / number of associated fault samples of the first intermediate node) and the second analysis value (number of co-occurring samples / number of associated fault samples of the second intermediate node). If the first analysis value is greater than the second analysis value, the transmission direction is determined to be from the first intermediate node (receiving end) to the second intermediate node (transmitting end), and the weight of this transmission direction is the first analysis value. If the second analysis value is greater than the first analysis value, the transmission direction is from the second intermediate node (receiving end) to the first intermediate node (transmitting end), and the weight is the second analysis value. However, this method is not limited to this.

[0079] For each pair of adjacent intermediate nodes in the fault transmission graph (corresponding to two different types of abnormal fault factors), the associated fault sample size (i.e., the total number of fault data samples that match the characteristic parameters of each abnormal fault factor) of each pair of intermediate nodes is used as the quantitative basis. By analyzing the correlation and proportion of the sample sizes of the two pairs, the fault transmission direction between each pair of adjacent intermediate nodes is determined one by one (clarifying from which intermediate node the fault propagates to which intermediate node). At the same time, the transmission weight corresponding to the transmission direction is calculated (quantifying the probability and intensity of fault propagation on this path). This achieves accurate quantitative definition of the transmission relationship between adjacent intermediate nodes and provides core parameter support for the complete construction of the fault transmission graph.

[0080] In one possible implementation, please refer to Figure 4 and Figure 6S224, based on the associated fault sample size of each pair of adjacent intermediate nodes, determines the propagation direction and propagation weight corresponding to the two adjacent intermediate nodes, including: S2241, analyze each pair of adjacent intermediate nodes, identify one of the two adjacent intermediate nodes as the first node, and the other as the second node.

[0081] It is understandable that selecting one of the adjacent intermediate nodes as the first node and identifying the other as the second node can clarify the analysis object for subsequent co-occurrence sample statistics, propagation direction determination and weight calculation.

[0082] S2242, In the operation and maintenance unit data, filter the number of data samples that simultaneously contain the abnormal fault factors corresponding to the first node and the abnormal fault factors corresponding to the second node within a preset time period, and confirm them as the number of co-occurring samples.

[0083] It is understandable that, in the operation and maintenance unit data, based on the fault propagation time characteristics, opening operation cycle, and data acquisition accuracy of the double-break rotary contact disconnector, a reasonable preset time period is first set (to define the temporal correlation of co-occurrence of fault factors; for example, the preset time period can be 50ms, 500ms, 1s, etc., to ensure the capture of the continuous propagation relationship of adjacent faults). Then, for each group of defined first and second nodes, effective data samples that simultaneously include the abnormal fault factors corresponding to the first node and the abnormal fault factors corresponding to the second node within the preset time period and match in time sequence are selected from all operation and maintenance unit data. The total number of such samples is counted, and the statistical result is confirmed as the number of co-occurrence samples corresponding to the adjacent intermediate nodes (first node and second node) of that group, providing correlation data support for subsequent determination of the transmission direction and quantification of transmission weight through sample proportion analysis.

[0084] S2243, divide the number of co-occurring samples by the number of associated fault samples corresponding to the first node to obtain the first analysis value, and divide the number of co-occurring samples by the number of associated fault samples corresponding to the second node to obtain the second analysis value.

[0085] It can be understood that the number of co-occurring samples corresponding to adjacent nodes is used as the numerator, and division is performed with the number of associated fault samples corresponding to the first node and the number of associated fault samples corresponding to the second node, respectively. Through this calculation process, the first analysis value and the second analysis value are obtained, where the first analysis value represents the proportion of co-occurring samples in the associated fault samples of the first node, and the second analysis value represents the proportion of co-occurring samples in the associated fault samples of the second node. The first analysis value and the second analysis value together constitute a reference index for determining the direction of fault propagation and quantifying the propagation weight.

[0086] S2244, if the first analysis value is greater than the second analysis value, then connect the receiving end in the transmission direction to the first node, connect the transmitting end in the transmission direction to the second node, and divide the number of co-occurring samples by the number of associated fault samples corresponding to the first node to obtain the transmission weight; if the first analysis value is less than the second analysis value, then connect the receiving end in the transmission direction to the second node, connect the transmitting end in the transmission direction to the first node, and divide the number of co-occurring samples by the number of associated fault samples corresponding to the second node to obtain the transmission weight.

[0087] It is understandable that if the first analytical value is greater than the second analytical value, it indicates that the proportion of co-occurring samples in the fault associated with the first node is higher, meaning that the fault is more likely to propagate from the first node to the second node. Therefore, the receiving end of the propagation direction is connected to the first node, and the transmitting end is connected to the second node. The propagation weight of this direction is directly adopted using the first analytical value (i.e., the calculation result of the number of co-occurring samples divided by the number of associated fault samples corresponding to the first node). If the first analytical value is less than the second analytical value, it indicates that the proportion of co-occurring samples in the fault associated with the second node is higher, and the fault propagation direction is from the second node to the first node. In this case, the receiving end of the propagation direction is connected to the second node, and the transmitting end is connected to the first node. The propagation weight is adopted using the second analytical value (i.e., the calculation result of the number of co-occurring samples divided by the number of associated fault samples corresponding to the second node). This ensures that the determination of the propagation direction and weight are based on the statistical laws of the data, thereby achieving a quantitative representation of the fault propagation relationship.

[0088] S300, based on the fault transmission diagram, obtains a first performance index and at least one second performance index; wherein, the first performance index and the second performance index reflect the probability of the double-break rotary contact disconnector normally switching from the closed conduction state to the open isolation state, and the second performance index corresponds to the abnormal fault factors.

[0089] It is understandable that a first performance index and at least one second performance index are obtained based on the fault transmission diagram (including core elements such as nodes, transmission direction and transmission weight). The core function of both types of performance indexes is to quantitatively reflect the probability of the equipment switching normally from the closed conduction state to the open isolation state, intuitively characterize the reliability level of the open switching, and provide a quantitative basis for subsequent location of key fault hazards and optimization of operation and maintenance strategies.

[0090] In one possible implementation, please refer to Figure 7 S300, based on the fault transmission diagram, obtains a first performance index and at least one second performance index, including: S310, obtain at least one effective path based on the fault transmission graph; wherein, the effective path is reflected in the fault transmission graph as a path that can reach the terminal node by starting from the starting node, passing through intermediate nodes along the transmission direction.

[0091] It is understandable that by systematically traversing and validating the paths of all potential transmission links in the fault transmission diagram, at least one valid path can be selected (specifically, in the fault transmission diagram, a complete transmission link that starts from the starting node representing the closed conduction state, passes through one or more intermediate nodes representing abnormal fault factors along the defined fault transmission direction, and finally can be continuously connected to the terminating node representing the open isolation state) to provide a basis for the subsequent quantitative calculation of performance indicators.

[0092] S320: Multiply the propagation weights corresponding to the propagation directions of each effective path to obtain the path weights of each effective path, and then add up the path weights to obtain the first performance index.

[0093] It is understandable that for each valid path, the transmission weights corresponding to all transmission directions on that valid path are multiplied together (because the fault needs to propagate sequentially along the path, the weight product can represent the probability of the fault occurring when the valid path is fully connected), to obtain the path weight corresponding to each valid path. After the path weights of all valid paths are calculated, all path weights are summed, and the final sum is the first performance index. The first performance index, by aggregating the fault impact probabilities of all valid paths, intuitively reflects the overall degree of influence of various abnormal fault factors on the equipment during the process of switching from the closed conduction state to the open isolation state, providing a quantitative basis for subsequent evaluation of the open reliability.

[0094] S330, step a: after identifying the abnormal fault factor corresponding to an intermediate node in each valid path as the target factor, delete the valid path corresponding to the target factor, and then add the path weights corresponding to the remaining valid paths to obtain the second performance index; wherein, the second performance index corresponds to the target factor.

[0095] The process involves first selecting an abnormal fault factor corresponding to an intermediate node from all abnormal fault factors and defining it as the target factor (used to accurately quantify the impact of this fault factor on the tripping switching). Then, among all the previously selected valid paths, all valid paths containing intermediate nodes associated with the target factor are selectively filtered and deleted (i.e., all fault links excluded from the propagation of this fault factor). Finally, for the remaining valid paths that were not deleted (fault propagation paths unaffected by the target factor), their respective path weights are summed. The resulting sum is the second performance indicator corresponding to the target factor. This indicator quantifies the impact of a single abnormal fault factor on the equipment tripping switching process by comparing the difference in the sum of fault path weights containing and excluding the target factor, providing quantitative support for locating key fault hazards.

[0096] S340, step b: restore the deleted valid paths and determine whether there are any abnormal fault factors in each valid path that have not been identified as target factors; if there are abnormal fault factors in each valid path that have not been identified as target factors, then confirm the abnormal fault factors that have not been identified as target factors as target factors and repeat step a.

[0097] It is understandable that the first step is to fully restore the valid paths that were deleted in step a, ensuring that all original valid paths in the fault propagation graph return to their initial state where they can participate in the calculation. Then, the intermediate nodes corresponding to all abnormal fault factors are further checked to determine whether there are still abnormal fault factors that have not been defined as target factors. If the check results show that there are abnormal fault factors that have not been identified as target factors, one of the undefined abnormal fault factors is selected and re-identified as a new target factor. Then, the calculation process of target factor targeted elimination and remaining path weight summation is repeated in step a until all abnormal fault factors are identified as target factors one by one and the corresponding second performance index is calculated, ensuring that the degree of influence of each abnormal fault factor can be quantified.

[0098] S400, the analysis results are obtained based on the first performance index and the second performance index.

[0099] It is understandable that the analysis results based on the first and second performance indicators can be obtained by first using the first performance indicator (the sum of the weights of all effective paths, representing the overall degree of influence of all abnormal fault factors during the disconnection switch switching process) as the core benchmark, and then performing correlation analysis between each second performance indicator (the sum of the weights of the remaining effective paths after excluding a single target fault factor, representing the degree of local fault impact after removing the fault factor) and the first performance indicator, calculating the difference between the first performance indicator and the corresponding second performance indicator (quantifying the contribution of a single fault factor to the overall fault impact), or the ratio of the second performance indicator to the first performance indicator (representing the reduction ratio of the fault impact after removing the fault factor), clarifying the weight and criticality of each abnormal fault factor on the reliability of the disconnection switch switching, and then assessing the overall fault risk level of the equipment disconnection switch switching based on the value of the first performance indicator (e.g., the higher the first performance indicator, the more significant the overall fault impact and the lower the reliability). Finally, combining the overall reliability assessment results and the impact of each individual fault factor in order of magnitude to form a comprehensive analysis result, providing data support for subsequent operation and maintenance strategy optimization (e.g., prioritizing the investigation of high-impact fault factors) and analysis of disconnection switch reliability.

[0100] Based on the calculated first performance index (characterizing the overall impact of the fault) and the second performance index (characterizing the targeted impact of a single fault factor) corresponding to each abnormal fault factor, a comprehensive comparison and correlation analysis is conducted to obtain a comprehensive analysis result. This result shows the overall reliability level of the disconnector switch opening and switching. At the same time, it clarifies the impact weight and criticality of each individual abnormal fault factor on the opening and switching process, providing a basis for subsequent development of targeted operation and maintenance optimization strategies, prioritizing the investigation of high-impact fault hazards, and improving the stability of equipment opening and switching.

[0101] In one possible implementation, please refer to Figure 7 The analysis results for S400, based on the first and second performance indicators, include: S410, subtract the values ​​of each second performance index from the first performance index and take the absolute value to obtain the impact value of the abnormal fault factor corresponding to each second performance index.

[0102] It can be understood that, using the primary performance indicator (representing the overall impact of a fault) as a benchmark, the difference between the primary performance indicator and each of the secondary performance indicators (corresponding to the local fault impact after removing individual abnormal fault factors) is calculated one by one. The absolute value of the difference is then taken, and the final result is the impact value of the abnormal fault factor corresponding to each secondary performance indicator. The magnitude of the impact value directly reflects the contribution weight of a single abnormal fault factor to the overall fault impact of the equipment's tripping switching. A higher value indicates a more significant impact of the fault factor on the tripping reliability, providing a quantitative basis for subsequently prioritizing key fault hazards and formulating operation and maintenance strategies.

[0103] S420: After adding up all the impact values ​​to obtain the total impact value, divide each impact value by the total impact value to obtain the fault effect value corresponding to each abnormal fault factor.

[0104] The process involves first summing the impact values ​​of all abnormal fault factors to obtain a total impact value that represents the overall influence of all fault factors. Then, the individual impact value of each abnormal fault factor is divided by this total impact value. The final result is the fault effect value for each abnormal fault factor. The fault effect value, expressed as a percentage, accurately represents the relative weight of a single abnormal fault factor among all fault factors. A higher value indicates a more significant dominant role of the fault factor in the reliability of equipment tripping and switching, providing an intuitive quantitative basis for subsequent priority ranking of potential faults and allocation of maintenance resources.

[0105] S430, the sorting table formed by sorting the various fault effect values ​​from largest to smallest is confirmed as the analysis result.

[0106] It is understandable that all abnormal fault factors are sorted in descending order of their fault effect values ​​to construct a clear fault effect value ranking table, and this ranking table is confirmed as the final analysis result. The abnormal fault factor with the higher its fault effect value in the ranking table, the stronger its relative impact on the reliability of the equipment tripping. The analysis results provide an intuitive quantitative decision-making reference for prioritizing the handling of key fault hazards, allocating operation and maintenance resources, and formulating reliability improvement plans.

[0107] The execution entity of the performance analysis method for double-break rotary contact disconnectors provided in this application embodiment can be a control unit. The control unit may include: at least one processor, at least one memory, and a computer program stored in at least one memory and capable of running on at least one processor. When the processor executes the computer program, it implements the steps in any of the above embodiments of the performance analysis method for double-break rotary contact disconnectors.

[0108] For example, a computer program can be divided into one or more modules / units, one or more of which are stored in memory and executed by a processor to complete this application. One or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the control unit.

[0109] The control unit can be a desktop computer, cloud server, or other computing device. This control unit may include, but is not limited to, a processor and memory. Those skilled in the art will understand that the above embodiments are merely examples of a control unit and do not constitute a limitation on the control unit. It may include more or fewer components, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0110] The processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0111] In some embodiments, the memory may be an internal storage unit of the control unit, such as the hard disk or RAM of the control unit. In other embodiments, the memory may be an external storage device of the control unit, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the control unit. Furthermore, the memory may include both internal storage units and external storage devices of the control unit. The memory is used to store the operating system, applications, bootloader, data, and other programs, such as program code for computer programs. The memory can also be used to temporarily store data that has been output or will be output.

[0112] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A double-break rotary contact isolating switch, characterized in that, include: Install the housing; A rotary operating part is rotatably mounted on the mounting housing, and the rotary operating part has two moving contacts; Two stationary contact assemblies are disposed on the mounting housing, and the stationary contact assemblies have stationary contacts; The rotating operating part is used to rotate so that the two moving contacts respectively come into contact with the two stationary contacts to form a conductive path.

2. The double-break rotary contact isolating switch as described in claim 1, characterized in that, The rotating operating unit includes: A rotating component is rotatably mounted on the mounting housing. A moving contact assembly, disposed on the rotating member, the moving contact assembly having two moving contacts; and A rotary drive device is disposed on the mounting and receiving component; The rotary drive device is used to drive the rotating component to rotate, thereby causing the moving contact assembly to rotate, so that the moving contact separates from or contacts the stationary contact.

3. The double-break rotary contact isolating switch as described in claim 1, characterized in that, The stationary contact assembly includes: A stationary contact, disposed on the mounting housing, having the stationary contact point; and An arc-extinguishing assembly is disposed on the mounting and receiving component. The arc-extinguishing assembly has an arc-extinguishing groove, and the stationary contact and the moving contact are located within the arc-extinguishing groove.

4. A method for performance analysis of a double-break rotary contact disconnector, characterized in that, The method for analyzing the double-break rotary contact disconnector as described in any one of claims 1 to 3 includes: Obtain operation and maintenance information; wherein, the obtained operation and maintenance information includes operation and maintenance data of the double-break rotary contact disconnector and at least one abnormal fault factor, the abnormal fault factor reflecting an abnormality in the switching of the double-break rotary contact disconnector from the closed conduction state to the open isolation state; A fault transmission diagram is obtained based on the operation and maintenance information; wherein, the fault transmission diagram includes a starting node, an ending node, at least one intermediate node, at least two transmission directions, and a transmission weight corresponding to each of the transmission directions, and the fault transmission diagram reflects the state of the double-break rotary contact disconnector during the process of switching from the closed conduction state to the open isolation state; Based on the fault transmission diagram, a first performance index and at least one second performance index are obtained; wherein, the first performance index and the second performance index reflect the probability that the double-break rotary contact disconnector normally switches from the closed conduction state to the open isolation state, and the second performance index corresponds to the abnormal fault factor; The analysis results are obtained based on the first performance index and the second performance index.

5. The performance analysis method for a double-break rotary contact disconnector as described in claim 4, characterized in that, The fault transmission diagram obtained based on the operation and maintenance information includes: The closing and conducting state is identified as the starting node, the opening and isolation state is identified as the ending node, and each of the abnormal fault factors is identified as the intermediate node. The transmission direction and the transmission weight are obtained based on the operation and maintenance information; wherein, the receiving end of the transmission direction is connected to the starting node or the intermediate node, the transmitting end of the transmission direction is connected to the terminating node or the intermediate node, and the direction extending from the receiving end to the transmitting end reflects the fault propagation direction between two adjacent nodes.

6. The performance analysis method for a double-break rotary contact disconnector as described in claim 5, characterized in that, The process of obtaining the conduction direction and the conduction weight based on the operation and maintenance information includes: Based on the operation and maintenance information, the operating characteristic parameters of the disconnecting switch corresponding to each of the abnormal fault factors are obtained. The operation and maintenance data are extracted at preset time intervals to obtain operation and maintenance unit data; Within the operation and maintenance unit data, the number of fault data samples that match the operation characteristic parameters corresponding to each of the abnormal fault factors is counted, and the number of fault data samples corresponding to each of the abnormal fault factors is confirmed as the associated fault sample quantity of the intermediate node corresponding to the abnormal fault factor. The transmission direction and transmission weight corresponding to the two adjacent intermediate nodes are determined based on the number of associated fault samples corresponding to each pair of adjacent intermediate nodes.

7. The performance analysis method for a double-break rotary contact disconnector as described in claim 6, characterized in that, The step of obtaining the disconnector switch operating characteristic parameters corresponding to each of the abnormal fault factors based on the operation and maintenance information includes: Based on the fault type of each of the aforementioned abnormal fault factors, the operation and maintenance data are classified to obtain at least one fault set corresponding to each of the aforementioned abnormal fault factors; the fault set includes operation data of the same type of fault related to the same fault type; Each fault set is determined to have a proportion of fault operation data that is greater than the corresponding preset fault threshold. If the proportion of fault operation data that is greater than the corresponding preset fault threshold in the fault set is greater than the preset proportion threshold, then the average value of the fault operation data that is greater than the corresponding preset fault threshold is confirmed as the disconnector switch operation characteristic parameter.

8. The performance analysis method for a double-break rotary contact disconnector as described in claim 6, characterized in that, The step of determining the propagation direction and propagation weight corresponding to the two adjacent intermediate nodes based on the associated fault sample size corresponding to each of the two adjacent intermediate nodes includes: Each pair of adjacent intermediate nodes is analyzed separately, and one of the two adjacent intermediate nodes is identified as the first node and the other as the second node; In the operation and maintenance unit data, the number of data samples that simultaneously contain the abnormal fault factor corresponding to the first node and the abnormal fault factor corresponding to the second node within a preset time period are selected and confirmed as the number of co-occurring samples. The first analysis value is obtained by dividing the number of co-occurring samples by the number of associated fault samples corresponding to the first node, and the second analysis value is obtained by dividing the number of co-occurring samples by the number of associated fault samples corresponding to the second node. If the first analysis value is greater than the second analysis value, then the receiving end in the conduction direction is connected to the first node, the transmitting end in the conduction direction is connected to the second node, and the number of co-occurring samples is divided by the number of associated fault samples corresponding to the first node to obtain the conduction weight; if the first analysis value is less than the second analysis value, then the receiving end in the conduction direction is connected to the second node, the transmitting end in the conduction direction is connected to the first node, and the number of co-occurring samples is divided by the number of associated fault samples corresponding to the second node to obtain the conduction weight.

9. The performance analysis method for a double-break rotary contact disconnector as described in claim 4, characterized in that, The process of obtaining a first performance index and at least one second performance index based on the fault transmission diagram includes: At least one effective path is obtained based on the fault transmission graph; wherein, the effective path is reflected in the fault transmission graph as a path that can reach the termination node from the starting node along the transmission direction through the intermediate nodes; The path weights corresponding to the transmission directions of each effective path are multiplied together to obtain the path weights of each effective path. The first performance index is obtained by adding the path weights together. Step a: After identifying the abnormal fault factor corresponding to one of the intermediate nodes in each of the effective paths as the target factor, delete the effective path corresponding to the target factor, and then add the path weights corresponding to the remaining effective paths to obtain the second performance index; wherein, the second performance index corresponds to the target factor; Step b involves restoring the deleted valid paths and determining whether there are any abnormal fault factors in each valid path that have not been identified as the target factor. If there are abnormal fault factors in each valid path that have not been identified as the target factor, then the abnormal fault factors that have not been identified as the target factor are identified as the target factor, and step a is repeated.

10. The performance analysis method for a double-break rotary contact disconnector as described in claim 9, characterized in that, The analysis results obtained based on the first performance index and the second performance index include: Subtract the values ​​of each of the second performance indicators from the first performance indicator and take the absolute value to obtain the influence value of the abnormal fault factor corresponding to each of the second performance indicators. After adding up all the influence values ​​to obtain the total influence value, divide each of the influence values ​​by the total influence value to obtain the fault effect value corresponding to each of the abnormal fault factors. The sorting table formed by sorting the various fault effect values ​​from largest to smallest is confirmed as the analysis result.

Images