Station bus topology identification method and device based on switch interval

Abstract

A power station bus topology identification method based on switch intervals comprises the steps that a power station topology structure data model is designed, a data model is built for power station electrical equipment and a topology connection relation of the power station electrical equipment, and the model covers key elements such as endpoints and switch equipment; switch interval division and identification: completing switch equipment identification, dividing switch intervals into circuit breaker intervals and isolation switch intervals, and automatically marking switch interval types and functional attributes by analyzing the connection relation of the switch equipment; and station bus topological structure identification based on the switch intervals: completing the automatic identification of the station bus topological structure by analyzing the connection mode between the switch intervals and the bus attributes. According to the invention, the actual connection mode of the power grid is reflected more intuitively by directly starting from the switch interval basic unit; the method achieves the recognition of all bus topological structures, can quickly respond to the change of the state of a power grid in combination with the real-time topological data, and timely updates the recognition result of the plant station bus topological structure.

Description

Technical Field

[0001] The present invention relates to the field of electric power systems, and in particular to a method and a device for identifying a plant bus topology based on a switch bay. Background Art

[0002] With the rapid development of power systems, the grid structure has become increasingly complex, especially in a network structure with multiple outgoing lines and multiple interconnection lines. The path of power flow has become extremely complex, which has posed unprecedented challenges to power system management. In order to meet these challenges, topology analysis technology has become a basic functional module for various advanced applications of power systems. It provides necessary data support for functions such as power flow calculation, state estimation, fault diagnosis, stability assessment, and substation misoperation prevention judgment.

[0003] Topology analysis technology is the basic functional module of various advanced applications of power systems. Functions such as power flow calculation, state estimation, fault diagnosis, stability assessment, and substation anti-misoperation judgment all require the topology analysis module to provide necessary data support. The topology structure of the power network is a network structure in which multiple physical primary devices are closely connected. It is represented by a tree-structured connectivity graph. Its basic purpose is to convert the physical model of the power grid into a busbar model. The commonly used basic methods of topology analysis are tree search method, adjacency matrix method, and topology analysis methods based on other new technologies. For example, the "Research on Power Grid Topology Analysis Algorithm" published in the Journal of Nanjing Institute of Technology in 2013, No. 2, completes the explanation of the principle of power grid topology analysis based on the tree search method, adjacency matrix method, and node labeling method; the "Research and Implementation of Automatic Generation Method of Substation Primary Topology Diagram" published in the 12th issue of Automation Application in 2024 generates the substation primary topology diagram based on the whole station system configuration file (SCD).

[0004] Traditional topology analysis technology is mainly limited to simplifying physical models into node and bus models. The basic topology data obtained can only provide basic structural information of the power grid. However, in response to the increasing demand for intelligence, increasingly complex network operation status, and higher standards for system stability, economy, and environmental friendliness, its function is relatively simple and the amount of information provided is relatively limited. In order to meet the development needs of modern power systems, it is urgent to develop more advanced and comprehensive topology analysis methods. Summary of the invention

[0005] In view of the analysis of the above background technology, the present invention proposes a plant bus topology identification method based on switch bay, which aims to automatically identify the topological structure and operation mode of different buses in the plant, thereby supporting more efficient power grid management and operation. The technical solution is as follows:

[0006] A method for identifying a power station busbar topology based on a switch bay, characterized by comprising the following steps:

[0007] S1. Construct a plant topology data model for the plant core equipment (such as lines, main transformers, generators, loads, capacitors or reactors) and their topological connection relationships, providing basic data support for the subsequent plant bus topology identification;

[0008] S2. Switch bay division and identification: complete switchgear identification (switchgear includes circuit breakers, disconnectors, and earthing switches, etc.), and divide switch bays into circuit breaker bays and disconnector bays. By analyzing the connection relationship of switchgear, the bay type and functional attributes are automatically marked, providing accurate bay information for subsequent plant busbar topology identification;

[0009] S3, Identification of the plant busbar topology structure based on the switch bay, by analyzing the connection mode and busbar properties between the switch bays, the plant busbar topology structure is automatically identified;

[0010] Specifically, the plant topology data model design is based on the structured file of the plant original data table to complete the allocation of switch device identifiers and record their attributes. The switch device identifiers include switch code, switch name, plant name, voltage level, switch type, switch status, switch position and other information.

[0011] Furthermore, by traversing the switch devices, the endpoints of each switch device are extracted and stored to form an endpoint table, which includes information such as the endpoint name, the plant station name to which the endpoint belongs, and the voltage level of the endpoint.

[0012] Specifically, the switch interval is divided into a circuit breaker interval and a disconnector interval. The plant busbar topology structure identification based on the switch interval is determined by analyzing the type of the switch interval, the connection method of the switch interval, the number of busbars, the connection method between the busbars, and whether there is a bypass busbar, etc. to determine whether it meets the characteristics of the corresponding main electrical connection. Finally, the main electrical connection type in the plant station is analyzed, including angle connection and 3 / 2 or 4 / 3 connection, single mother connection and single mother segmented connection, double mother connection and double mother segmented connection, connection with bypass, and inner bridge or outer bridge connection.

[0013] The advantages of the present invention over the prior art are:

[0014] (1) The present invention directly starts from the basic unit of the switch bay and more intuitively reflects the actual connection mode of the power grid;

[0015] (2) The present invention realizes the identification of all busbar topology structures based on the structural characteristics of different main connections. Combined with real-time topological data, it can quickly respond to changes in the power grid status and timely update the identification results of the plant busbar topology structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a method for identifying plant bus topology based on switch bays.

[0017] Figure 2 This is a flow chart of the steps for identifying the plant busbar topology structure.

[0018] Figure 3 It is an angular wiring method.

[0019] Figure 4 It is a single busbar wiring method.

[0020] Figure 5 It is a single busbar segmented wiring method.

[0021] Figure 6 It is a double busbar wiring method.

[0022] Figure 7 It is a double busbar segmented wiring method.

[0023] Figure 8 It is 3 / 2 wiring method.

[0024] Fig. 9 It is 4 / 3 wiring method.

[0025] Fig.10 It is a bypass wiring method.

[0026] Fig.11 It is an internal bridge wiring method.

[0027] Fig.12 It is an external bridge wiring method. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0029] refer to Figure 1-12 As shown, the present invention provides a method for identifying a plant bus topology based on a switch bay, and the method steps are as follows:

[0030] S10: Design of plant topology data model.

[0031] Import the original data table structured file of a plant station. The format is not limited to Excel format, XML format, CIM / E format, JSON format, etc.

[0032] A data model is constructed for the core equipment of the plant and its topological connection relationship, the switch equipment identifier is allocated, and its attributes are recorded. The switch table includes information such as switch code, switch name, plant name, voltage level, switch type, switch status, switch position, etc., as shown in Table 1.

[0033] Furthermore, by traversing the switches, the endpoints of each device are extracted and stored to form an endpoint table, including the endpoint name, the plant station name to which the endpoint belongs, and the voltage level of the endpoint, as shown in Table 2.

[0034] S20: Switch interval division and identification method.

[0035] The switch bays are automatically identified according to the switch bay division rules. The definition of the circuit breaker bay is based on the following characteristics: (1) there is only one circuit breaker in the bay; (2) it contains all disconnectors directly connected to the circuit breaker. According to this standard, the qualified circuit breakers and their associated disconnectors are first classified into the corresponding circuit breaker bays. After completing this step, other disconnectors that are not classified into the circuit breaker bays in the main wiring diagram are naturally classified into the disconnector bays. The switch bay structure is shown in Table 3.

[0036] Specifically, by traversing the switch table, taking each circuit breaker as the core, identify and mark all disconnectors directly connected to it, and classify them into the same circuit breaker interval. After completing the division of all circuit breaker intervals, continue to check whether there are disconnectors in the switch table that have not been assigned intervals. If such an disconnector is found, it will be used as the core to find all other disconnectors directly connected to it and classify them into the same disconnector interval.

[0037] Furthermore, according to the type of the switch interval, all the identified switch intervals are classified and stored into different sets, namely, switch interval sets of types S1 to S8, and each set corresponds to a specific type of switch interval.

[0038] Furthermore, according to the core equipment of the plant and station connected in series with the circuit breaker bays and the isolating switch bays, if they are directly connected, the bays are divided into incoming and outgoing line bays, otherwise they are uniformly marked as non-incoming and outgoing line bays.

[0039] S30. Identification of plant busbar topology based on switch bays.

[0040] Automatic identification of the plant bus topology can be achieved through comprehensive analysis of factors such as switch bay type, switch bay connection mode, number of busbars, connection method between busbars, and whether there is a bypass busbar.

[0041] Specifically, the method for identifying the plant bus topology structure based on the switch interval includes: a method for identifying delta connection and 3 / 2 or 4 / 3 connection, a method for identifying single-mother connection and single-mother segmented connection, a method for identifying double-mother connection and double-mother segmented connection, a method for identifying bypass connection, and a method for identifying internal bridge or external bridge connection.

[0042] S31: How to identify triangle wiring and 3 / 2 or 4 / 3 wiring.

[0043] First, the endpoint table is traversed to identify and store the endpoints at the target plant and target voltage level into the queue to be searched. The endpoint is taken out of the queue to be searched, marked as searched, and the set of intervals connected to the endpoint is analyzed to determine the number and type of connected intervals.

[0044] Furthermore, ignoring the isolating switch bay, if the endpoints connect two circuit breaker bays in series, the bay type is analyzed. If both are S4 type, the other two endpoints except the common endpoint are extracted.

[0045] Furthermore, if the endpoint is connected to three or more S4 type circuit breaker intervals, other endpoints are also extracted. For these endpoints, if they are connected to more than two S4 type intervals and are not in the queue to be searched, they are added to the queue. For the intervals that have been searched by both endpoints, if they do not exist in the string queue, they are added to the string queue.

[0046] After the traversal is completed, the system structure is determined based on the bus endpoints in the searched endpoint queue. If there are no bus endpoints, the system has an independent ring structure. The elements in the string list are the ring list, and the number of intervals in the ring list is the number of corners of the ring structure, forming a corner connection, such as Figure 3 shown.

[0047] Furthermore, according to the characteristics of 3 / 2 or 4 / 3 wiring, the "string" structure and the "ring" structure should meet the following characteristics: 1) At least 2 of all busbars at the same location are stored in a busbar set; 2) Between two busbars in the busbar set, there are more than 2 strings consisting of S1, S2, and S4 switch intervals; 3) Among all the strings between the two busbars, at least one string contains 3 or 4 circuit breaker intervals; 4) If there are only 2 strings between the two busbars, at least 1 busbar is not connected to the disconnector interval.

[0048] The maximum number of circuit breaker bays in all strings is 3, which forms a 3 / 2 connection. Figure 8 As shown, if it is 4, it forms a 4 / 3 connection, such as Fig. 9 shown.

[0049] S32. Method for identifying single-mother wiring and single-mother segmented wiring.

[0050] In the switch bay sets of types S1, S2 and S4, search for switch bays with one end connected to the incoming and outgoing lines and the other end connected to the busbar, and store all these busbars in the busbar set.

[0051] Take a busbar in the set of busbars. If the busbar is not connected to the bays in the set of S7 switch bays, all the incoming and outgoing line bays connected to the busbar form a single busbar, and mark the busbar as a single busbar. After the analysis of all the buses in the set of busbars is completed, all single busbars are stored in the single busbar set.

[0052] Search for non-incoming and outgoing line bays in all sets of switch bays from S1 to S7. If the two ends of the bay are connected to two busbars in the single busbar set, and the two busbars are located on both sides of the circuit breaker, the bay is marked as a segmented bay, and the two busbars are marked as segments of each other.

[0053] All mutually segmented busbars and connected switch bays form a single busbar segmented wiring, such as Figure 5 As shown, there are no mutually segmented busbars and connected switch bays to form a single busbar connection, such as Figure 4 shown.

[0054] S33. Method for identifying double mother wiring and double mother segmented wiring.

[0055] In the S3 and S5 switch bay sets, search for switch bays with one end connected to the incoming and outgoing lines and the other two ends connected to the busbars. These two busbars are marked as double-mother main busbars and are double-mother to each other. All these busbars are stored in the double busbar set.

[0056] Search for non-incoming and outgoing line intervals in the switch interval set from type S1 to S6. If the two ends of the interval are connected to two busbars in the double busbar set, and the two busbars are double busbars to each other, and the two busbars are located on both sides of the circuit breaker, then the interval is marked as a bus tie interval.

[0057] Search all non-incoming and outgoing line bays in the switch bay set from S1 to S7. If the two ends of the bay are connected to two busbars in the double busbar set, and the two busbars are not mutually double busbars, the bay is marked as a segmented bay.

[0058] If the number of all mutually double-mother busbars is 2, these busbars and the connected switch bays form a double-mother connection, such as Figure 6 As shown; if the number of all mutually double-mother busbars is 3 or 4, these busbars and the connected switch bays form a double-mother single-section connection, such as Figure 7 shown.

[0059] S34. Identification method with bypass wiring

[0060] For the main connection forms of single bus, single bus section, double bus or double bus section, all main busbars are identified and collected to form a main busbar set.

[0061] Select a bay from the S7 switch bay set and check the connection status of its two ends. If one end is connected to the incoming and outgoing lines and the other end is not connected to any bus in the main bus set, mark the endpoint as a bypass bus. After completing the inspection of all bays in the S7 switch bay set, collect all endpoints marked as bypass buses to form a bypass bus set.

[0062] Further, check the non-incoming and outgoing line bays in the switch bay set of S1 to S6. For bays that are not included in the current main connection range, if their two ends are only connected to the main bus and the bypass bus, and these buses are located on both sides of the circuit breaker bay, then mark the bay as a bypass bay.

[0063] Furthermore, in the current main connection, all switch intervals of bypass busbar connections that meet the bypass interval conditions are added to form a connection mode with bypass, such as Fig.10 shown.

[0064] S35. How to identify internal or external bridge wiring

[0065] In the switch interval sets of classes S1, S2, S4 and S7, search for the switch interval whose one end is connected to the incoming and outgoing lines, and store the other end endpoint in the first type of bridging endpoint set; select an incoming and outgoing line interval from the switch interval sets of classes S1, S2 and S4, if the interval is only connected to one incoming and outgoing line interval in the S7 class switch interval set, store the common endpoint in the second type of bridging endpoint set.

[0066] Select a non-incoming and outgoing line interval from the S1, S2, and S4 switch interval sets. If one end of the interval is connected to an endpoint in the first type of bridge endpoint set and the other end is connected to an endpoint in the second type of bridge endpoint set, then the circuit breaker interval is marked as a bridge interval and the two end points are marked as bridge buses. All bridge intervals are judged according to the above conditions and stored in the bridge bus interval set.

[0067] Furthermore, if there is only one bridge bay in the bridge bus bay set, the bridge bay and the connected incoming and outgoing line bays are ordinary bridge connections; if all main transformer bays are disconnector bays and all line bays are circuit breaker bays, they are internal bridge connections, such as Fig.11 As shown; if in the switch bays of the bridge connection, all main transformer bays are circuit breaker bays and all line bays are disconnector bays, it is an external bridge connection, such as Fig.12 As shown;.

[0068] The present invention discloses a method for identifying a plant bus topology based on a switch bay, which adopts a topology structure with a switch bay as a basic unit, and completes the identification of the bus topology structure based on the switch bay topology. At the same time, compared with the prior art, the method for identifying a plant bus topology based on a switch bay proposed by the present invention has the following advantages: (1) the method based on the switch bay topology directly starts from the basic unit of the switch bay, and more intuitively reflects the actual connection mode of the power grid; (2) based on the structural characteristics of different main connections, the identification of all bus topology structures is realized, and combined with real-time topological data, it can quickly respond to changes in the power grid state and timely update the identification results of the plant bus topology structure.

[0069] Table 1 Switchgear data structure table

[0070]

[0071] Table 2 Endpoint data structure table

[0072]

[0073] Table 3 Switch interval structure table

[0074]

[0075]

[0076] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A method for identifying power station bus topology based on switch bay, characterized by: The steps include: S1. Construct a plant topology data model for the plant core equipment and its topological connection relationship, providing basic data support for the subsequent plant bus topology identification; S2. Switch bay division and identification: complete switchgear identification and divide the switch bay into circuit breaker bay and disconnector bay. By analyzing the connection relationship of the switchgear, the bay type and functional attributes are automatically marked to provide accurate bay information for subsequent plant busbar topology identification. S3. Identification of the plant busbar topology structure based on the switch bay. By analyzing the connection mode and busbar properties between the switch bays, the plant busbar topology structure is automatically identified.

2. The method for identifying power station bus topology based on switch bay according to claim 1 is characterized by: The plant station topology data model is based on the plant station original data table structured file, completes the switch device identifier allocation, and records its attributes. The switch device identifier includes switch code, switch name, plant station name, voltage level, switch type, switch status, and switch position information; the identification of the plant station busbar topology structure is based on analyzing the type of switch interval, switch interval connection method, number of buses, connection method between buses, and whether there is a bypass bus to determine whether it meets the characteristics of the corresponding busbar topology structure; the plant station busbar topology connection data is based on the plant station original data table structured file, and the format is not limited to Excel format, XML format, CIM / E format, and JSON format; the switch device includes circuit breakers, disconnectors, and grounding switches.

3. The method for identifying power station bus topology based on switch bay according to claim 1 is characterized by: The switch interval division and identification is to divide the switch equipment into circuit breaker intervals and disconnector intervals, and according to the core equipment of the plant connected in series with the circuit breaker intervals and the disconnector intervals, if they are directly connected, the intervals are divided into incoming and outgoing line intervals, otherwise they are uniformly marked as non-incoming and outgoing line intervals; the core equipment includes lines, main transformers, generators, loads, capacitors or reactors.

4. The method for identifying power station bus topology based on switch bay according to claim 1 is characterized by: The identification of the busbar topology structure of the power plant based on the switch bay is to determine whether it meets the characteristics of the corresponding main electrical connection by analyzing the type of switch bay, the connection method between switch bays, the number of busbars, the connection method between busbars and whether there is a bypass busbar, and finally analyze the type of main electrical connection in the power plant; the main electrical connection type includes single bus connection and single bus segmented connection, angle connection and 3 / 2 or 4 / 3 connection, double bus connection and double bus segmented connection, connection with bypass, and inner bridge or outer bridge connection.

5. The method for identifying the power station bus topology based on the switch bay according to claim 4 is characterized in that: the identification method of the single bus connection and the single bus segmented connection is as follows: (1) In the switch bay sets of type S1, type S2, and type S4, search for switch bays with one end connected to the incoming and outgoing lines and the other end connected to the busbar, and store all these busbars in the busbar set; (2) Take a bus in the set of busbars. If the busbar is not connected to the bays in the set of S7 switch bays, all the incoming and outgoing line bays connected to the busbar form a single busbar, and the busbar is marked as a single busbar. After all the busbars in the set of busbars are analyzed, all single busbars are stored in the single busbar set. (3) Search for non-incoming and outgoing line bays in all sets of switch bays from S1 to S7. If the two ends of the bay are connected to two busbars in the single busbar set, and the two busbars are located on both sides of the circuit breaker, the bay is marked as a segmented bay, and the two busbars are marked as mutually segmented. (4) All mutually segmented busbars and connected switch bays constitute a single busbar segmented wiring, and busbars and connected switch bays that are not mutually segmented constitute a single busbar wiring; The S1-S7 switch interval structure is as follows:

6. The method for identifying power station bus topology based on switch bay according to claim 5 is characterized by: The identification method of the triangle connection and the 3 / 2 or 4 / 3 connection is as follows: (1) Traverse the endpoint table, identify and store the endpoints at the target plant and target voltage level into a queue to be searched; take out the endpoint from the queue to be searched, mark it as searched, and analyze the interval set connected to the endpoint to determine the number and type of the connection interval; (2) Ignore the isolating switch interval. If the endpoints connect two circuit breaker intervals in series, analyze the interval type. If both are S4 type, extract the other two endpoints except the common endpoint. (3) If the endpoint is connected to three or more S4 type circuit breaker intervals, other endpoints are also extracted; for these endpoints, if they are connected to more than two S4 type intervals and are not in the queue to be searched, they are added to the queue; for the intervals that have been searched by both endpoints, if they do not exist in the string queue, they are added to the string queue; (4) Determine the system structure based on the bus endpoints in the searched endpoint queue; if there are no bus endpoints, the system has an independent ring structure, the elements in the string list are the ring list, and the number of intervals in the ring list is the number of corners of the ring structure, forming a corner connection; (5) According to the characteristics of 3 / 2 or 4 / 3 wiring, the "string" structure and "ring" structure should meet the following characteristics: 1) At least two of all busbars at the same location are stored in the busbar set; 2) There are more than two strings of S1, S2, and S4 switch bays between two busbars in the busbar set; 3) Among all the strings between two busbars, at least one string contains 3 or 4 circuit breaker bays; 4) If there are only two strings between the two busbars, at least one busbar is not connected to the disconnector bay; (6) The maximum number of circuit breaker bays in all strings is 3 for a 3 / 2 connection and 4 for a 4 / 3 connection.

7. A method for identifying a plant bus topology based on switch bays according to claim 5, characterized in that: the identification method of the double bus connection and the double bus segmented connection is as follows: (1) In the S3 and S5 switch bay sets, search for switch bays with one end connected to the incoming and outgoing lines and the other two ends connected to the busbars. These two busbars are marked as double-bus main busbars and double-bus main busbars to each other. All these busbars are stored in the double-bus set. (2) Search for non-incoming and outgoing line bays in the switch bay set from S1 to S6. If the two ends of the bay are connected to two busbars in the double busbar set, and the two busbars are double busbars to each other, and the two busbars are located on both sides of the circuit breaker, then the bay is marked as a bus tie bay; (3) Search all non-incoming and outgoing line bays in the switch bay set from S1 to S7. If the two ends of the bay are connected to two busbars in the double busbar set, and the two busbars are not mutually double busbars, then the bay is marked as a segmented bay. (4) If the number of all busbars that are double mothers is 2, these busbars and the connected switch bays constitute a double mother connection. If the number of all busbars that are double mothers is 3 or 4, these busbars and the connected switch bays constitute a double mother single-section connection.

8. The method for identifying a plant bus topology based on switch bays according to claim 5 is characterized in that: the method for identifying a bypass connection is as follows: (1) For the main connection forms of single bus, single bus section, double bus or double bus section, identify and collect all main buses to form a main bus set; (2) Select a bay from the S7 switch bay set and check the connection status of its two ends; if one end is connected to the incoming and outgoing lines and the other end is not connected to any bus in the main bus set, mark the endpoint as a bypass bus; after completing the inspection of all bays in the S7 switch bay set, collect all endpoints marked as bypass buses to form a bypass bus set; (3) Check the non-incoming and outgoing line bays in the switch bay set of S1 to S6; for bays that are not included in the current main connection range, if their two ends are only connected to the main bus and the bypass bus, and these buses are located on both sides of the circuit breaker bay, then mark the bay as a bypass bay; (4) In the current main connection, all switch intervals for bypass bus connections that meet the bypass interval conditions are added to form a connection mode with bypass.

9. A method for identifying a power station bus topology based on switch bays according to claim 5, characterized in that: the method for identifying the inner bridge or outer bridge connection is as follows: (1) In the switch bay sets of types S1, S2, S4, and S7, search for a switch bay with one end connected to an incoming or outgoing line, and store the other end point in the first type of bridge endpoint set; select an incoming or outgoing line bay from the switch bay sets of types S1, S2, and S4, and if the bay is only connected to one incoming or outgoing line bay in the switch bay set of type S7, store the common end point in the second type of bridge endpoint set; (2) Select a non-incoming and outgoing line bay from the S1, S2, and S4 switch bay sets. If one end of the bay is connected to an endpoint in the first bridge endpoint set and the other end is connected to an endpoint in the second bridge endpoint set, then mark the circuit breaker bay as a bridge bay and mark the two end points as bridge buses. Judge all bridge bays according to the above conditions and store them in the bridge bus bay set. (3) If there is only one bridge bay in the bridge bus bay set, the bridge bay and the connected incoming and outgoing line bays are ordinary bridge connections; if all main transformer bays are disconnector bays and all line bays are circuit breaker bays, it is an internal bridge connection; if in the switch bays of the bridge connection, all main transformer bays are circuit breaker bays and all line bays are disconnector bays, it is an external bridge connection.

10. A plant bus topology identification device based on switch bay, characterized by comprising: The following modules: Plant and station topology structure data model module: constructs a data model for plant and station electrical equipment and their topological connection relationships. The plant and station topology structure data model is designed based on the plant and station original data table structured file, completes the allocation of switch device identifiers, and records their attributes. The switch table includes switch code, switch name, plant and station name, voltage level, switch type, switch status, and switch position information; By traversing the switches, the endpoints of each device are extracted and stored to form an endpoint table, which includes the endpoint name, the plant station name to which the endpoint belongs, and the voltage level information of the endpoint; Switch bay division and identification module: completes switch equipment identification, and divides the switch bay into circuit breaker bay and disconnector bay. According to the core equipment of the plant and station connected in series with the circuit breaker bay and the disconnector bay, if they are directly connected, the bay is divided into incoming and outgoing line bays, otherwise it is uniformly marked as non-incoming and outgoing line bays; The plant bus topology structure identification module based on switch bays: The plant bus topology structure identification module based on switch bays determines whether the corresponding electrical main connection characteristics are met by analyzing the type of bays, the connection method between bays, the number of busbars, the connection method between busbars, and whether there is a bypass busbar. Finally, the electrical main connection types in the plant are analyzed, including angle connection and 3 / 2 or 4 / 3 connection, single bus connection and single bus segmented connection, double bus connection and double bus segmented connection, connection with bypass, and internal bridge or external bridge connection.

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