Intelligent substation logic principle automatic matching method

Abstract

The invention discloses an intelligent substation logic principle automatic matching method. According to the method, links such as voltage level layering, interval type division, equipment parameter configuration and the like are associated with historical data in real time, and each step is not an independent design module any more, but forms a mutually matched organic whole. The subsequent matching threshold setting can be directly influenced through the early-stage voltage grade layering result, the interval type division can provide the basis for the locking logic priority ranking, the repeated labor of manual intervention is greatly reduced through the cross-step data flow, and the parameter conflict problem caused by disconnection of all links in the traditional design is avoided. Meanwhile, generated configuration results can be continuously fed back to a historical database, matching models and logic rules are continuously optimized, and configuration precision and efficiency can be higher and higher after long-term use.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of transformer substations, and particularly relates to a method for automatically matching logical principles of intelligent transformer substations. BACKGROUND

[0002] The matching of the logical principles of transformer substations refers to a process of modeling and verifying the logical relationship between various types of devices, protection devices and automation systems in the transformer substations, so as to ensure that the devices can work cooperatively in normal operation and fault states. The matching is based on electrical principles, protection logic and control strategies, and accurately configures the action sequence of the devices, signal transmission and blocking conditions, so as to prevent misoperation, refusal to operate or logical conflicts. The matching of the logical principles is widely applied to the design, debugging, operation and maintenance and reconstruction stages of transformer substations, and is a key technical means for guaranteeing the safe and stable operation of power grids and improving the reliability of power supply. Through the process, intelligent linkage between the devices and rapid fault isolation can be realized, and the automation level and operation efficiency of the transformer substations are improved.

[0003] However, the prior art has the problem that the design links are disconnected in the configuration of the logical principles of transformer substations, and the steps of voltage level division, interval type matching and device parameter configuration are mostly independent operations. Data is difficult to transfer across links, frequent manual intervention is required and parameter conflicts are prone to occur. Meanwhile, a dynamic optimization mechanism is lacked, and the configuration rules cannot be iteratively updated according to actual operation data. SUMMARY

[0004] The purpose of the application is to solve the above-mentioned problems, and provide a method for automatically matching the logical principles of intelligent transformer substations.

[0005] The technical scheme adopted by the application is as follows: a method for automatically matching the logical principles of intelligent transformer substations, comprising the following steps: S1: according to the system tree structure, the devices of typical intervals are configured according to each voltage level, the same intervals are automatically matched, and individual different interval configurations are modified; S2: the division of the construction period and the interval type in the system tree, the configuration of the multi-interval devices according to the classification of the secondary system, the setting of the group cabinet scheme, the demarcation of the installation area, the determination of the plane layout of each room according to specific rules and the determination of the installation position of the devices; S3: according to the actual demand of the transformer substation, the function configuration of the current transformers and the voltage transformers of the multi-type intervals in each voltage level of the transformer substation is performed; S4: the blocking principle is determined through the type and operation mode of the transformer substation devices; the signal loop of the to-be-configured devices is determined according to the type of the devices and the typical signals of the devices; S5: according to the given loop rule, the secondary system loop logical principle diagram is automatically generated; at the same time, the related cable list and the room plane layout diagram are generated.

[0006] In a preferred embodiment, in step S1, according to the system tree structure, the configuration of multi-interval devices is performed, and the group cabinet scheme is set, the installation area is delimited, the plane layout of each cubicle is realized according to specific rules, and the installation position of the device is determined; each loop module is called to realize the automatic matching generation of multiple types of loops.

[0007] System tree structure analysis and voltage level hierarchical configuration. By traversing the device node topology relationship of the system tree, the voltage level parameters and interval characteristics of each level device are extracted, the device cluster is divided according to the voltage levels of 10kV, 35kV, 110kV, etc., and a hierarchical interval configuration index system is established. Based on the standard operating parameter range of each voltage level, the typical interval template of the corresponding level is generated, which includes the core parameters such as main device model, secondary loop topology and protection configuration; the parameters of the interval to be configured within the same voltage level are scanned synchronously, and the actual parameters are compared with the typical template parameters in multiple dimensions, and the same interval is identified through a dynamic matching algorithm and the template configuration is automatically applied. For individual difference intervals with parameter deviation exceeding the threshold, parameter adjustment is made in combination with the historical configuration correction records of the voltage level to form a standardized interval configuration data set, which provides dynamic threshold basis for subsequent interval matching precision control (such as the automatic matching judgment of S3).

[0008] In a preferred embodiment, in step S1, the matching threshold of the voltage level association is dynamically adjusted as follows: ; In the formula: T is the interval matching judgment threshold, which decreases with the increase of the voltage level, ensuring the strictness of the high-voltage level interval configuration. This threshold is directly used for the identification and judgment of the difference interval in S1, and when the deviation value of the actual parameter and the template parameter is greater than T, the manual correction process is triggered; T0 is the reference threshold, which is based on the standard configuration deviation allowed range of the lowest voltage level, and is determined by extracting the long-term running deviation mean value of the interval of the same voltage level from the historical configuration database; k is the voltage level influence coefficient, which reflects the sensitivity difference of different voltage levels to the configuration precision. A larger k value corresponds to a higher voltage level, so that T decreases faster with the increase of the voltage level; V is the voltage level unit value of the interval, which is quantified according to the rule of taking 1 for 10kV, 2 for 35kV, and 3 for 110kV, to ensure that the formula can adapt to the hierarchical configuration requirements of different voltage levels.

[0009] In a preferred embodiment, in step S2, in combination with the voltage level cluster combed in S1 and the typical interval template, the construction period is first divided according to the substation construction time sequence, the intervals related to the function of the same voltage level are classified into the same construction unit to ensure that the equipment operation schedule matches the system expansion demand; at the same time, according to the interval characteristic parameters extracted in S1, the interval classification is refined according to the functions such as the main transformer bus tie, and the interval configuration list with type label is generated to provide the type identification basis for the automatic matching algorithm of S3.

[0010] For the secondary system, the protection and control communication secondary equipment modules are matched according to the interval type, the secondary loop topology parameters in the typical template of S1 are referred to, and the standardized configuration of multiple interval devices is completed; on this basis, combined with the construction scale and the number of intervals of each period, the group cabinet scheme design is carried out, the number of group cabinets and the layout of devices in the cabinet are determined through the space adaptation degree calculation model, and the installation area boundary is also determined to ensure that the group cabinet arrangement meets the requirements of operation channel width and device heat dissipation spacing. According to the space parameters of the installation area, the small room plane layout is further optimized, the same type interval devices are arranged according to the functional zoning principle, the specific installation points are determined through the device installation position coordinate calculation, and the three-dimensional configuration data set containing the period type space coordinates is generated to provide the space constraint parameters for the automatic matching of S3. At the same time, the configuration results are fed back to the historical database of S1 to improve the interval type-space layout correlation characteristics and support the iterative optimization of S5.

[0011] In a preferred embodiment, in step S2, the calculation formula of the space adaptation degree calculation model in the group cabinet scheme design is as follows: ; In the formula: F is the calculation result of the group cabinet space adaptation degree, which directly determines the dynamic adjustment direction of the number of group cabinets. When F is greater than 1, the number of group cabinets needs to be increased to meet the device installation demand, and when F is less than 0.8, the redundant cabinets can be reduced. This result is used for the rapid optimization of the group cabinet scheme in S2, and also provides a quantitative basis for the iterative adjustment of the installation area of S5; N0 is the basic group cabinet number, which is determined based on the number of secondary devices in the typical interval template and the standard cabinet capacity parameters, and reflects the minimum group cabinet demand of a single interval; w p is the construction period weight coefficient, which is dynamically adjusted as the construction stage advances. The first construction takes 0.7 to prioritize the functional integrity, and the later expansion takes 0.3 to focus on the space reuse efficiency; C t is the interval type complexity coefficient, which is assigned according to the interval type label divided in S2. The main transformer interval takes 1.2, the outgoing line interval takes 1.0, and the bus tie interval takes 0.9, which reflects the difference in device integration difficulty of different types of intervals; S cThe installation area space constraint coefficient is calculated from the boundary dimensions of the installation area defined by S2. The value ranges from 0.6 to 1.2. When space is ample, a higher value is used to allow for a compact layout, while a lower value is used when space is limited to force a dispersed layout.

[0012] In a preferred embodiment, in step S3, the performance requirements of core functions such as protection, metering, and measurement on current transformers and voltage transformers are first sorted out. Then, the typical bay template parameters of each voltage level in S1 and the bay type labels of outgoing lines, main transformers, and bus couplers in S2 are retrieved simultaneously to establish a correlation mapping between functional requirements and transformer parameters.

[0013] For different voltage level intervals, based on the installation area space dimensions and cabinet assembly scheme determined by S2, suitable instrument transformer models and specifications are selected to ensure that the installation dimensions match the cabinet layout. Then, the functional parameter matching algorithm is used to calculate the degree of fit between the key parameters such as the transformer ratio, accuracy class, and transient characteristics and the actual requirements. Priority is given to meeting the protection function parameter requirements of high voltage level intervals, while also taking into account the metering accuracy requirements of low voltage level intervals.

[0014] The configuration results generate a list of transformer parameters, which is fed back to the historical database of S1 to supplement the transformer-bay type association features, providing a basis for parameter verification for automatic matching in S4. At the same time, the space adaptability data is synchronized to the cabinet scheme optimization module of S2 to ensure the compatibility of the configuration scheme with the installation space.

[0015] In a preferred embodiment, in step S3, the formula for calculating the transformer function-parameter matching degree is: ; In the formula: K represents the overall matching degree of the current transformer configuration scheme. A higher value indicates better synergy in functional requirements, parameter performance, and spatial adaptability. It is directly used to determine whether the current configuration scheme meets actual needs. When K is greater than the threshold, the configuration parameters are automatically locked. Otherwise, the current transformer model and specifications are readjusted.

[0016] α is the functional requirement weighting coefficient. It is dynamically adjusted according to the bay type divided by S2. The main transformer bay is set to 0.4 to prioritize protection functions. The outgoing line bay is set to 0.3 to balance metering and measurement requirements.

[0017] β is the parameter performance weighting coefficient. Referencing the voltage level stratification results in S1, a weight of 0.4 is used for 110kV and above bays, and 0.3 for 35kV and below. This ensures the parameter accuracy requirements for high-voltage level bays.

[0018] γ is the spatial adaptation weight coefficient. The installation space constraints are determined based on the S2 cabinet scheme. It is set to 0.2 when there is ample space inside the cabinet. It is set to 0.3 when space is limited. This enhances the installation feasibility under a compact layout.

[0019] R f This represents the degree of functional requirement fulfillment. The value ranges from 0 to 1. It is calculated based on the degree of conformity between actual requirements such as protection action time and metering error limits and the performance parameters of the instrument transformer. The data comes from a survey of actual needs at substations.

[0020] P p This represents the parameter matching degree. Its value ranges from 0 to 1. It is determined by the deviation rate between parameters such as the transformer ratio and accuracy class and the standard parameters in the typical S1 bay template. The smaller the deviation, the closer Pp is to 1.

[0021] S s For spatial adaptability. Value range: 0-1. Calculated based on the matching between the dimensions of the cabinet installation area defined in S2 and the external dimensions of the instrument transformer. A value of 1 is taken when the installation clearance meets maintenance requirements. Otherwise, it is linearly reduced according to the proportion of insufficient clearance.

[0022] In a preferred embodiment, in step S4, for high-voltage level intervals, the transformer protection signal configured in S3 is preferentially included as the interlocking trigger condition; for low-voltage level intervals, the focus is on the conventional five-proof interlocking of disconnect switches and circuit breakers, and the interlocking logic is simultaneously embedded into the secondary circuit topology of the cabinet scheme in S2 to ensure that the interlocking command transmission path matches the cabinet layout. At the same time, according to the equipment type (such as current transformer, voltage transformer, intelligent terminal) and its typical signal characteristics (such as overcurrent alarm, open circuit signal, telemetry data) determined in S3, the signal circuit configuration process is initiated: the secondary equipment module list generated in S2 is called according to the interval type, the protection and measurement and control signals are allocated to the corresponding cabinets according to functional priority, the signal transmission efficiency of different wiring schemes is calculated through the signal circuit reliability assessment model, and the circuit design with the shortest path and strong anti-interference capability is selected first; at the same time, the signal circuit configuration result is fed back to the transformer parameter list in S3 to supplement the signal interface matching characteristics and provide circuit performance data support for the iterative optimization in S5.

[0023] In a preferred embodiment, in step S4, the locking logic priority coefficient is calculated as follows: ; In the formula: L is the priority coefficient for the interlocking logic. Its value determines the execution order of the interlocking rules. The larger the value, the higher the priority of the interlocking condition. It is directly used for the dynamic sequencing of the hierarchical interlocking logic system in S4. High-priority interlocking conditions will preferentially occupy the secondary loop resources in the S2 cabinet scheme.

[0024] This is the voltage level influence coefficient. It is determined based on the voltage level stratification results of S1. A coefficient of 1.2 is used for 110kV and above bays, 1.0 for 35kV, and 0.8 for 10kV. This reflects the interlocking safety requirements of high-voltage level equipment.

[0025] R T Risk coefficients for bay types. Values ​​are assigned based on the bay type labels defined in S2. Main transformer bays are assigned 1.3. Outgoing line bays are assigned 1.1. Bus tie bays are assigned 0.9. This reflects the differences in the fault impact range of different functional bays.

[0026] ω M This represents the weighting coefficient for the operating mode. It is dynamically adjusted based on the current operating status. Maintenance mode is weighted at 1.2. Fault isolation mode is weighted at 1.5. Normal operating mode is weighted at 0.8. This ensures the reliability of interlocking under special operating scenarios.

[0027] P F This represents the probability of equipment failure. It is calculated based on historical failure data accumulated during the configuration of the S3 instrument transformer. The value ranges from 0 to 1. Equipment with frequent failures corresponds to a higher PF value. Therefore, its interlocking conditions should be prioritized and incorporated into the logic system.

[0028] In a preferred embodiment, the specific steps for automatically generating the secondary system loop logic schematic diagram in step S5 are as follows: Based on the hierarchical interlocking logic and signal loop configuration results of S4, the automatic schematic diagram generation engine is activated, the interlocking logic priority sorting and signal transmission path data of S4 are called, and the secondary loop topology template in the S2 cabinet scheme is retrieved simultaneously as the basic framework. Loop connection relationships are automatically drawn according to protection, measurement and control, and interlocking functional zones, embedding the current transformer signal interface parameters of S3 and the typical signal characteristics of equipment in S4 to the loop nodes to ensure that the signal flow is consistent with the anti-interference path design of S4. The matching of the loop logic with the standard parameters of the S1 voltage level is verified, and the interface compatibility of key loops in high-voltage level intervals is highlighted. After generation, the schematic diagram is fed back to the S1 historical database to supplement the loop logic-equipment parameter-spatial layout association features, supporting the subsequent linked generation of cable lists and layout diagrams.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, by linking voltage level stratification, interval type classification, and equipment parameter configuration with historical data in real time, each step is no longer an independent design module, but forms an organic whole that works together. The results of the initial voltage level stratification directly affect the subsequent matching threshold setting, and the interval type classification provides a basis for prioritizing the interlocking logic. This cross-step data flow significantly reduces repetitive manual intervention and avoids parameter conflicts caused by the disconnect between different stages in traditional design. At the same time, the generated configuration results are continuously fed back to the historical database, constantly optimizing the matching model and logic rules. Over long-term use, the configuration accuracy and efficiency will continue to improve.

[0030] 2. In this invention, the protection circuits with high-voltage level intervals significantly enhance interface compatibility with transformer parameters. The priority of interlocking logic is dynamically sorted based on equipment failure probability and operating mode, ensuring that safety constraints of critical equipment are prioritized. Simultaneously, the automatic generation of secondary circuit schematics, cable lists, and floor plans directly reuses prior data such as equipment coordinates and cabinet layouts, avoiding spatial conflicts or circuit misconnections that may occur during manual drawing. The generated results meet both the space requirements for on-site installation and ensure signal transmission anti-interference capabilities, reducing rework risks during project implementation and thus improving the overall work efficiency of this method. Attached Figure Description

[0031] Figure 1 This is a schematic diagram illustrating the process principle of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] Example: Refer to Figure 1 A method for automatic matching of logic principles in intelligent substations includes the following steps: S1: Based on the system tree structure, configure typical bay equipment according to each voltage level. Match the same bays automatically and modify the configuration of individual different bays. S2: The substation construction phase and bay type are divided in the system tree. The configuration of multi-bay equipment is carried out according to the classification of secondary systems, and the cabinet grouping scheme is set. The installation area is delineated, and the layout of each small room and the equipment installation position are determined according to specific rules. S3: Configure the functions of current transformers and voltage transformers in various types of bays at each voltage level of the substation according to the actual needs of the substation. S4: Determine the interlocking principle based on the type and operation mode of the substation equipment; determine the signal circuit of the proposed equipment based on the equipment type and typical equipment signals; S5: Based on the given loop rules, automatically generate the secondary system loop logic diagram; at the same time, generate the relevant cable list and the room layout diagram.

[0034] In step S1, based on the system tree structure, the configuration of multi-bay equipment is carried out, the cabinet scheme is set, the installation area is delineated, the floor plan of each small room is realized according to specific rules, and the equipment installation position is determined; each loop module is called to realize the automatic matching and generation of multiple types of loops.

[0035] System tree structure parsing and voltage level hierarchical configuration. By traversing the device node topology of the system tree, the voltage level parameters and bay characteristics of each level of equipment are extracted. Equipment clusters are divided according to voltage levels such as 10kV, 35kV, and 110kV, establishing a hierarchical bay configuration index system. Based on the standard operating parameter range of each voltage level, typical bay templates for the corresponding level are generated. The templates include core parameters such as main equipment model, secondary circuit topology, and protection configuration. Simultaneously, the parameters of bays to be configured within the same voltage level are scanned, and the actual parameters are compared with the typical template parameters in multiple dimensions. A dynamic matching algorithm is used to identify identical bays and automatically apply the template configuration. For individual bays with parameter deviations exceeding the threshold, the parameters are adjusted based on the historical configuration correction records of that voltage level, forming a standardized bay configuration dataset. This provides a dynamic threshold basis for subsequent bay matching accuracy control (such as automatic matching judgment of S3).

[0036] In step S1, the dynamic adjustment formula for the matching threshold associated with the voltage level is: ; In the formula: T is the interval matching judgment threshold, which decreases as the voltage level increases to ensure the strictness of the high voltage level interval configuration. This threshold is directly used for the identification and judgment of the difference interval in S1. When the deviation between the actual parameter and the template parameter is greater than T, the manual correction process is triggered. T0 is the baseline threshold, and its value is determined based on the allowable deviation range of the standard configuration at the lowest voltage level. It is determined by extracting the average long-term operating deviation at the same voltage level interval from the historical configuration database. k is the voltage level influence coefficient, which reflects the difference in sensitivity of different voltage levels to configuration accuracy. Higher voltage levels correspond to larger k values, causing T to decrease more rapidly as the voltage level increases. V is the per-unit value of the voltage level to which the interval belongs, and it is quantified according to the rule of taking 1 for 10kV, 2 for 35kV, and 3 for 110kV to ensure that the formula can adapt to the hierarchical configuration requirements of different voltage levels. This formula dynamically correlates the voltage level with the matching threshold, enabling S1 to automatically improve matching accuracy when handling high voltage level intervals, thus laying the foundation for the stability of subsequent control strategies.

[0037] In step S2, combining the voltage level clusters and typical bay templates sorted out in S1, the construction phases are first divided according to the construction sequence of the substation, and bays with functions related to the same voltage level are assigned to the same construction units to ensure that the equipment commissioning progress and system expansion needs are matched; at the same time, based on the bay feature parameters extracted in S1, the bay classification is refined according to functions such as outgoing main transformer bus tie, and a bay configuration list with type labels is generated to provide type identification basis for the automatic matching algorithm in S3.

[0038] For the secondary system, secondary equipment modules such as protection, measurement, control, and communication are matched according to the bay type. Referring to the secondary circuit topology parameters in the S1 typical template, standardized configuration of multiple bay devices is completed. Based on this, and considering the construction scale and number of bays in each phase, cabinet grouping schemes are designed. The number of cabinets and the layout of equipment within each cabinet are determined using a spatial adaptability calculation model. Simultaneously, the installation area boundaries are delineated to ensure that the cabinet arrangement meets the requirements for maintenance access width and equipment heat dissipation spacing. Based on the spatial parameters of the installation area, the small room layout is further optimized. According to the functional zoning principle, equipment of the same type in bays is grouped together. Specific installation points are determined through equipment installation location coordinate calculations, generating a three-dimensional configuration dataset containing spatial coordinates of the phase type. This provides spatial constraint parameters for automatic matching in S3. Simultaneously, the configuration results are fed back to the historical database of S1 to improve the bay type-spatial layout correlation characteristics, supporting iterative optimization in S5.

[0039] In step S2, the calculation formula for the space adaptability calculation model in the cabinet assembly scheme design is as follows: ; In the formula: F is the result of the cabinet space adaptability calculation. Its value directly determines the direction of dynamic adjustment of the number of cabinets. When F is greater than 1, cabinets need to be added to meet the equipment installation requirements. When it is less than 0.8, redundant cabinets can be reduced. This result is used for the rapid optimization of the cabinet scheme in S2, and at the same time provides a quantitative basis for the iterative adjustment of the installation area in S5. N0 is the basic group cabinet number, which is determined based on the number of secondary equipment and standard cabinet capacity parameters in the typical S1 bay template, reflecting the minimum group cabinet requirement of a single bay. w p The weighting coefficient for each construction phase is dynamically adjusted as the construction progresses. The first phase of construction is assigned a weight of 0.7 to prioritize ensuring functional integrity, while the later expansion phase is assigned a weight of 0.3 to focus on space reuse efficiency. C tThe complexity coefficient for the bay type is assigned based on the bay type label divided by S2. The main transformer bay is assigned 1.2, the outgoing line bay is assigned 1.0, and the bus tie bay is assigned 0.9, reflecting the difference in equipment integration difficulty for different types of bays. S c The installation area space constraint coefficient is calculated from the boundary dimensions of the installation area defined by S2. The value ranges from 0.6 to 1.2. When space is ample, a higher value is used to allow for a compact layout, while a lower value is used when space is limited to force a dispersed layout.

[0040] In step S3, the performance requirements of core functions such as protection, metering, and measurement for current transformers and voltage transformers are first sorted out. Then, the typical bay template parameters of each voltage level in S1 and the bay type labels of outgoing lines, main transformers, and bus tie in S2 are retrieved simultaneously to establish the correlation mapping between functional requirements and transformer parameters.

[0041] For different voltage level intervals, based on the installation area space dimensions and cabinet assembly scheme determined by S2, suitable instrument transformer models and specifications are selected to ensure that the installation dimensions match the cabinet layout. Then, the functional parameter matching algorithm is used to calculate the degree of fit between the key parameters such as the transformer ratio, accuracy class, and transient characteristics and the actual requirements. Priority is given to meeting the protection function parameter requirements of high voltage level intervals, while also taking into account the metering accuracy requirements of low voltage level intervals.

[0042] The configuration results generate a list of transformer parameters, which is fed back to the historical database of S1 to supplement the transformer-bay type association features, providing a basis for parameter verification for automatic matching in S4. At the same time, the space adaptability data is synchronized to the cabinet scheme optimization module of S2 to ensure the compatibility of the configuration scheme with the installation space.

[0043] In step S3, the formula for calculating the mutual inductor function-parameter matching degree is: ; In the formula: K represents the overall matching degree of the current transformer configuration scheme. A higher value indicates better synergy in functional requirements, parameter performance, and spatial adaptability. It is directly used to determine whether the current configuration scheme meets actual needs. When K is greater than the threshold, the configuration parameters are automatically locked. Otherwise, the current transformer model and specifications are readjusted.

[0044] α is the functional requirement weighting coefficient. It is dynamically adjusted according to the bay type divided by S2. The main transformer bay is set to 0.4 to prioritize protection functions. The outgoing line bay is set to 0.3 to balance metering and measurement requirements.

[0045] β is the parameter performance weighting coefficient. Referencing the voltage level stratification results in S1, a weight of 0.4 is used for 110kV and above bays, and 0.3 for 35kV and below. This ensures the parameter accuracy requirements for high-voltage level bays.

[0046] γ is the spatial adaptation weight coefficient. The installation space constraints are determined based on the S2 cabinet scheme. It is set to 0.2 when there is ample space inside the cabinet. It is set to 0.3 when space is limited. This enhances the installation feasibility under a compact layout.

[0047] R f This represents the degree of functional requirement fulfillment. The value ranges from 0 to 1. It is calculated based on the degree of conformity between actual requirements such as protection action time and metering error limits and the performance parameters of the instrument transformer. The data comes from a survey of actual needs at substations.

[0048] P p This represents the parameter matching degree. Its value ranges from 0 to 1. It is determined by the deviation rate between parameters such as the transformer ratio and accuracy class and the standard parameters in the typical S1 bay template. The smaller the deviation, the closer Pp is to 1.

[0049] S s For spatial adaptability. Value range: 0-1. Calculated based on the matching between the dimensions of the cabinet installation area defined in S2 and the external dimensions of the instrument transformer. A value of 1 is taken when the installation clearance meets maintenance requirements. Otherwise, it is linearly reduced according to the proportion of insufficient clearance.

[0050] In step S4, for high-voltage level bays, the transformer protection signals configured in S3 are prioritized as interlocking trigger conditions; for low-voltage level bays, the focus is on the conventional five-proof interlocking of disconnect switches and circuit breakers, and the interlocking logic is simultaneously embedded into the secondary circuit topology of the cabinet scheme in S2 to ensure that the interlocking command transmission path matches the cabinet layout. At the same time, based on the equipment types determined in S3 (such as current transformers, voltage transformers, and intelligent terminals) and their typical signal characteristics (such as overcurrent alarms, open-circuit signals, and telemetry data), the signal circuit configuration process is initiated: the secondary equipment module list generated in S2 is called according to the bay type, and protection and control signals are allocated to the corresponding cabinets according to functional priority. The signal transmission efficiency of different wiring schemes is calculated through the signal circuit reliability assessment model, and the circuit design with the shortest path and strong anti-interference capability is selected first. Simultaneously, the signal circuit configuration results are fed back to the transformer parameter list in S3 to supplement signal interface matching characteristics, providing circuit performance data support for the iterative optimization in S5.

[0051] In step S4, the formula for calculating the locking logic priority coefficient is: ; In the formula: L is the priority coefficient for the interlocking logic. Its value determines the execution order of the interlocking rules. The larger the value, the higher the priority of the interlocking condition. It is directly used for the dynamic sequencing of the hierarchical interlocking logic system in S4. High-priority interlocking conditions will preferentially occupy the secondary loop resources in the S2 cabinet scheme.

[0052] This is the voltage level influence coefficient. It is determined based on the voltage level stratification results of S1. A coefficient of 1.2 is used for 110kV and above bays, 1.0 for 35kV, and 0.8 for 10kV. This reflects the interlocking safety requirements of high-voltage level equipment.

[0053] R T Risk coefficients for bay types. Values ​​are assigned based on the bay type labels defined in S2. Main transformer bays are assigned 1.3. Outgoing line bays are assigned 1.1. Bus tie bays are assigned 0.9. This reflects the differences in the fault impact range of different functional bays.

[0054] ω M This represents the weighting coefficient for the operating mode. It is dynamically adjusted based on the current operating status. Maintenance mode is weighted at 1.2. Fault isolation mode is weighted at 1.5. Normal operating mode is weighted at 0.8. This ensures the reliability of interlocking under special operating scenarios.

[0055] P F This represents the probability of equipment failure. It is calculated based on historical failure data accumulated during the configuration of the S3 instrument transformer. The value ranges from 0 to 1. Equipment with frequent failures corresponds to a higher PF value. Therefore, its interlocking conditions should be prioritized and incorporated into the logic system.

[0056] In step S5, the specific steps for automatically generating the secondary system loop logic schematic are as follows: Based on the hierarchical interlocking logic and signal loop configuration results of S4, the automatic schematic generation engine is started, the interlocking logic priority sorting and signal transmission path data of S4 are called, and the secondary loop topology template in the S2 cabinet scheme is retrieved as the basic framework. Loop connection relationships are automatically drawn according to protection, measurement and control, and interlocking functional zones, embedding the current transformer signal interface parameters of S3 and the typical signal characteristics of equipment in S4 to the loop nodes to ensure that the signal flow is consistent with the anti-interference path design of S4. The matching of the loop logic with the standard parameters of the S1 voltage level is verified, and the interface compatibility of key loops in high-voltage level bays is highlighted. After generation, the schematic is fed back to the S1 historical database to supplement the loop logic-equipment parameter-spatial layout association features, supporting the subsequent linkage generation of cable lists and layout diagrams.

[0057] Comparative Example 1 (not using this method: traditional manual configuration method) In a new 220kV substation construction project, the secondary system logic design was carried out using a traditional manual configuration method. During the design process, voltage level classification, bay type matching, and transformer parameter configuration were conducted independently, with data manually transferred via Excel spreadsheets. For example, after bay type classification, the results needed to be manually entered into the transformer configuration module. Due to inconsistent data formats, three parameter conflicts occurred (e.g., a 110kV outgoing bay was mistakenly associated with a 35kV transformer template), requiring two engineers to spend two days troubleshooting and correcting. During the secondary circuit schematic drawing stage, designers manually accessed historical drawing templates. Because this was not linked to the spatial layout data of the previous cabinet assembly plan, five cabinet spacing issues resulted (e.g., the distance between the protection cabinet and the control cabinet was only 0.8m, failing to meet the 1.2m maintenance access requirement). Later construction required readjusting the cabinet positions, incurring rework costs of approximately 12,000 yuan. The entire configuration cycle took 15 days, during which there were 12 manual modifications. The final logic diagram still has two missing interlocking logics (the bus tie bay was not included in the circuit breaker position signal interlocking), which need to be supplemented and improved during the commissioning phase.

[0058] Comparative Example 2 (using this method: intelligent automatic matching) In the construction of a new 220kV substation, this method was applied to configure the secondary system logic. During the initial design phase, the system automatically retrieved typical bay templates for 220kV voltage levels from the historical database, combined with real-time load data to divide the construction phases. Data from each stage was automatically transferred via dynamic indexing (e.g., bay type classification results were directly synchronized to the instrument transformer configuration module, avoiding manual input errors). During the instrument transformer parameter configuration phase, a function-parameter matching model was used to automatically select compatible models, and no parameter conflicts occurred during the matching process. When generating the secondary circuit schematic, the system linked the spatial coordinate data of the cabinet arrangement scheme, automatically checked the cabinet spacing and adjusted the layout, ensuring that the width of all maintenance access channels met the 1.2m requirement. The entire configuration cycle took only 6 days, with manual modifications reduced to 2 times (both for special customized needs). The logic schematic was verified to have no missing interlocking logic. No rework occurred during the project implementation phase due to design issues, saving 9 days of construction time and reducing rework costs by approximately 15,000 yuan compared to traditional methods.

[0059] The experimental data comparison is shown in the table below:

[0060] From the above, we can conclude that: In this invention, by linking voltage level stratification, interval type classification, and equipment parameter configuration with historical data in real time, each step is no longer an independent design module but forms a coordinated organic whole. The voltage level stratification results directly influence subsequent matching threshold settings, while interval type classification provides a basis for prioritizing interlocking logic. This cross-step data flow significantly reduces repetitive manual intervention and avoids parameter conflicts caused by disconnected processes in traditional designs. Simultaneously, the generated configuration results are continuously fed back to the historical database, constantly optimizing the matching model and logic rules. Over long-term use, configuration accuracy and efficiency will continuously improve.

[0061] In this invention, the protection circuits with high-voltage level intervals significantly enhance interface compatibility with transformer parameters. The blocking logic priority is dynamically sorted based on equipment failure probability and operating mode, ensuring that safety constraints of critical equipment are prioritized. Simultaneously, the automatic generation of secondary circuit schematics, cable lists, and floor plans directly reuses prior data such as equipment coordinates and cabinet layouts, avoiding spatial conflicts or circuit misconnections that may occur during manual drawing. The generated results meet both on-site installation space requirements and ensure signal transmission anti-interference capabilities, reducing rework risks during project implementation and thus improving the overall work efficiency of this method.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variations thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for automatic matching of logic principles in intelligent substations, characterized in that: Includes the following steps: S1: Based on the system tree structure, configure typical bay equipment according to each voltage level. Match the same bays automatically and modify the configuration of individual different bays. S2: The substation construction phase and bay type are divided in the system tree. The configuration of multi-bay equipment is carried out according to the classification of secondary systems, and the cabinet grouping scheme is set. The installation area is delineated, and the layout of each small room and the equipment installation position are determined according to specific rules. S3: Configure the functions of current transformers and voltage transformers in various types of bays at each voltage level of the substation according to the actual needs of the substation. S4: Determine the interlocking principle based on the type and operation mode of the substation equipment; determine the signal circuit of the proposed equipment based on the equipment type and typical equipment signals; S5: Based on the given loop rules, automatically generate the secondary system loop logic diagram; at the same time, generate the relevant cable list and the room layout diagram.

2. The method for automatic matching of logic principles in an intelligent substation as described in claim 1, characterized in that: In step S1, the configuration of multi-bay equipment is carried out according to the system tree structure, the cabinet scheme is set, the installation area is delineated, the floor plan of each small room is realized according to specific rules, and the equipment installation position is determined; each loop module is called to realize the automatic matching and generation of multiple types of loops. System tree structure parsing and voltage level hierarchical configuration: By traversing the device node topology of the system tree, voltage level parameters and bay characteristics of each level of equipment are extracted. Equipment clusters are divided according to voltage levels such as 10kV, 35kV, and 110kV, and a hierarchical bay configuration index system is established. Based on the standard operating parameter range of each voltage level, typical bay templates for the corresponding level are generated. The templates include core parameters such as main equipment model, secondary circuit topology, and protection configuration. Parameter scanning is performed on bays to be configured within the same voltage level. Actual parameters are compared with typical template parameters in multiple dimensions. A dynamic matching algorithm is used to identify identical bays and automatically apply template configuration. For individual bays with parameter deviations exceeding the threshold, parameters are adjusted based on historical configuration correction records for that voltage level, forming a standardized bay configuration dataset. This provides a dynamic threshold basis for subsequent bay matching accuracy control.

3. The method for automatic matching of logic principles in an intelligent substation as described in claim 1, characterized in that: In step S1, the dynamic adjustment formula for the matching threshold associated with the voltage level is: ； In the formula: T is the interval matching judgment threshold, which decreases as the voltage level increases to ensure the strictness of the high voltage level interval configuration. This threshold is directly used for the identification and judgment of the difference interval in S1. When the deviation between the actual parameter and the template parameter is greater than T, the manual correction process is triggered. T0 is the baseline threshold, and its value is determined based on the allowable deviation range of the standard configuration at the lowest voltage level. It is extracted from the historical configuration database and is the average of the long-term operating deviations at the same voltage level interval. k is the voltage level influence coefficient, which reflects the difference in sensitivity of different voltage levels to configuration accuracy. Higher voltage levels correspond to larger k values, causing T to decrease more rapidly as the voltage level increases. V is the per-unit value of the voltage level to which the interval belongs. It is quantified according to the rule of taking 1 for 10kV, 2 for 35kV, and 3 for 110kV to ensure that the formula can adapt to the hierarchical configuration requirements of different voltage levels.

4. The method for automatic matching of logic principles in an intelligent substation as described in claim 1, characterized in that: In step S2, based on the voltage level clusters and typical bay templates sorted out in S1, the construction phases are first divided according to the construction sequence of the substation, and bays with functions related to the same voltage level are assigned to the same construction units to ensure that the equipment commissioning progress matches the system expansion requirements; at the same time, based on the bay feature parameters extracted in S1, the bay classification is refined according to functions such as outgoing main transformer bus tie, and a bay configuration list with type labels is generated to provide type identification basis for the automatic matching algorithm in S3. For the secondary system, secondary equipment modules such as protection, measurement, control, and communication are matched according to the bay type. Referring to the secondary circuit topology parameters in the S1 typical template, the standardized configuration of multiple bay devices is completed. On this basis, combined with the construction scale and number of bays in each phase, cabinet grouping scheme design is carried out. The number of cabinets and the layout of equipment in the cabinets are determined through a spatial adaptability calculation model. At the same time, the installation area boundary is delineated to ensure that the cabinet arrangement meets the requirements of the maintenance channel width and equipment heat dissipation spacing. According to the spatial parameters of the installation area, the layout of the small room is further optimized. According to the functional zoning principle, the equipment of the same type in the bays is arranged in a concentrated manner. The specific placement points are determined by calculating the equipment installation location coordinates. A three-dimensional configuration dataset containing the spatial coordinates of the phase type is generated to provide spatial constraint parameters for the automatic matching of S3. At the same time, the configuration results are fed back to the historical database of S1 to improve the bay type-spatial layout correlation features and support the iterative optimization of S5.

5. The method for automatic matching of logic principles in an intelligent substation as described in claim 1, characterized in that: In step S2, the calculation formula for the space adaptability calculation model in the cabinet assembly scheme design is as follows: ； In the formula: F is the result of the cabinet space adaptability calculation. Its value directly determines the direction of dynamic adjustment of the number of cabinets. When F is greater than 1, cabinets need to be added to meet the equipment installation requirements. When it is less than 0.8, redundant cabinets can be reduced. This result is used for the rapid optimization of the cabinet scheme in S2, and at the same time provides a quantitative basis for the iterative adjustment of the installation area in S5. N0 is the basic group cabinet number, which is determined based on the number of secondary equipment and standard cabinet capacity parameters in the typical S1 bay template, reflecting the minimum group cabinet requirement of a single bay. w p The weighting coefficient for each construction phase is dynamically adjusted as the construction progresses. The first phase of construction is assigned a weight of 0.7 to prioritize ensuring functional integrity, while the later expansion phase is assigned a weight of 0.3 to focus on space reuse efficiency. C t The complexity coefficient for the bay type is assigned based on the bay type label divided by S2. The main transformer bay is assigned 1.2, the outgoing line bay is assigned 1.0, and the bus tie bay is assigned 0.9, reflecting the difference in equipment integration difficulty for different types of bays. S c The installation area space constraint coefficient is calculated from the boundary dimensions of the installation area defined by S2, and its value ranges from 0.6 to 1.

2. A higher value is used when space is ample to allow for a compact layout, and a lower value is used when space is limited to force a dispersed layout.

6. The method for automatic matching of logic principles in an intelligent substation as described in claim 1, characterized in that: In step S3, the performance requirements of core functions such as protection, metering, and measurement for current transformers and voltage transformers are first sorted out. Then, the typical bay template parameters of each voltage level in S1 and the bay type labels of outgoing lines, main transformers, and bus tie in S2 are retrieved simultaneously to establish the association mapping between functional requirements and transformer parameters. For different voltage level intervals, based on the installation area space dimensions and cabinet scheme determined by S2, suitable current transformer models and specifications are selected to ensure that the installation dimensions match the cabinet layout. Then, the key parameters such as current transformer ratio, accuracy class, and transient characteristics are calculated using the functional parameter matching algorithm to determine their compatibility with actual needs. Priority is given to meeting the protection function parameter requirements of high voltage level intervals, while also taking into account the metering accuracy requirements of low voltage level intervals. The configuration results generate a list of transformer parameters, which is fed back to the historical database of S1 to supplement the transformer-bay type association features, providing a basis for parameter verification for automatic matching in S4. At the same time, the space adaptability data is synchronized to the cabinet scheme optimization module of S2 to ensure the compatibility of the configuration scheme with the installation space.

7. The method for automatic matching of logic principles in an intelligent substation as described in claim 1, characterized in that: In step S3, the formula for calculating the transformer function-parameter matching degree is: ； In the formula: K represents the overall matching degree of the current transformer configuration scheme; The higher the value, the better the coordination of functional requirements, parameter performance, and spatial adaptation; it is directly used to determine whether the current configuration scheme meets the actual needs; when K is greater than the threshold, the configuration parameters are automatically locked; otherwise, the current transformer model and specifications are readjusted. α is the functional requirement weighting coefficient; it is dynamically adjusted according to the interval type divided by S2; the main transformer interval is set to 0.4 to prioritize protection functions; the outgoing line interval is set to 0.3 to balance metering and measurement requirements; β is the parameter performance weighting coefficient; refer to the voltage level stratification results in S1; take 0.4 for 110kV and above intervals; take 0.3 for 35kV and below; ensure the parameter accuracy requirements of high voltage level intervals; γ is the spatial adaptation weight coefficient; determined based on the installation space constraints of the S2 cabinet scheme; taken as 0.2 when there is ample space inside the cabinet; taken as 0.3 when space is limited; enhancing the installation feasibility under a compact layout; R f This represents the degree of functional requirement satisfaction; the value range is 0-1; it is calculated based on the degree of conformity between actual requirements such as protection action time and metering error limit and the performance parameters of the instrument transformer; the data comes from the results of a survey of actual needs of substations. P p Pp represents the parameter matching degree, ranging from 0 to 1. It is determined by the deviation rate between parameters such as transformer ratio and accuracy class and the standard parameters in the typical S1 bay template. The smaller the deviation, the closer Pp is to 1. S s For spatial adaptability; the value range is 0-1; it is calculated based on the matching of the cabinet installation area size defined by S2 with the external dimensions of the current transformer; the value is 1 when the installation gap meets the operation and maintenance requirements; otherwise, it is linearly reduced according to the gap deficiency ratio.

8. The method for automatic matching of logic principles in an intelligent substation as described in claim 1, characterized in that: In step S4, for high-voltage level bays, the transformer protection signal configured in S3 is preferentially included as the interlocking trigger condition; for low-voltage level bays, the focus is on the conventional five-proof interlocking of disconnecting switches and circuit breakers, and the interlocking logic is simultaneously embedded into the secondary circuit topology of the cabinet scheme in S2 to ensure that the interlocking command transmission path matches the cabinet layout; at the same time, according to the equipment type and its typical signal characteristics determined in S3, the signal circuit configuration process is initiated: the secondary equipment module list generated in S2 is called according to the bay type, the protection and measurement and control signals are allocated to the corresponding cabinets according to functional priority, the signal transmission efficiency of different wiring schemes is calculated through the signal circuit reliability assessment model, and the circuit design with the shortest path and strong anti-interference capability is selected first; at the same time, the signal circuit configuration results are fed back to the transformer parameter list in S3 to supplement the signal interface matching characteristics and provide circuit performance data support for the iterative optimization in S5.

9. The method for automatic matching of logic principles in an intelligent substation as described in claim 1, characterized in that: In step S4, the formula for calculating the locking logic priority coefficient is: ； In the formula: L is the priority coefficient of the latching logic; Its value determines the execution order of the interlocking rules; the larger the value, the higher the priority of the interlocking condition; it is directly used for the dynamic sorting of the hierarchical interlocking logic system in S4; high-priority interlocking conditions will occupy the secondary loop resources in the S2 cabinet scheme first; The voltage level influence coefficient is determined based on the voltage level stratification results of S1; 1.2 is taken for 110kV and above intervals; 1.0 for 35kV; and 0.8 for 10kV; reflecting the interlocking safety requirements of high-voltage equipment. R T Risk coefficients for bay types are assigned based on the bay type labels defined by S2; the main transformer bay is assigned 1.3; the outgoing line bay is assigned 1.1; and the bus tie bay is assigned 0.9; reflecting the differences in the fault impact range of different functional bays. ω M This is the weighting coefficient for the operating mode; it is dynamically adjusted based on the current operating status; 1.2 for maintenance mode; 1.5 for fault isolation mode; and 0.8 for normal operation mode. Ensure the reliability of interlocking under special operating scenarios; P F This represents the probability of equipment failure; it is calculated based on historical failure data accumulated during the configuration of the S3 instrument transformer; the value ranges from 0 to 1; equipment with frequent failures corresponds to a higher PF value. Promote the inclusion of its locking conditions into the logical system.

10. The method for automatic matching of logic principles in an intelligent substation as described in claim 1, characterized in that: In step S5, the specific steps for automatically generating the secondary system circuit logic schematic are as follows: Based on the hierarchical interlocking logic and signal circuit configuration results of S4, the automatic schematic generation engine is started, the interlocking logic priority sorting and signal transmission path data of S4 are called, and the secondary circuit topology template in the S2 cabinet scheme is retrieved as the basic framework; the circuit connection relationship is automatically drawn according to the protection, measurement and control, and interlocking functional areas, and the current transformer signal interface parameters of S3 and the typical signal characteristics of equipment in S4 are embedded to the circuit nodes to ensure that the signal flow is consistent with the anti-interference path design of S4; the matching of the circuit logic with the standard parameters of the voltage level of S1 is verified, and the interface compatibility of the key circuits in the high voltage level interval is highlighted; after generation, the schematic is fed back to the S1 historical database to supplement the circuit logic-equipment parameter-spatial layout association features to support the subsequent linkage generation of cable list and layout diagram.

Images