A method, device and equipment for preventing misoperation of a relay protection device and a storage medium

Abstract

The application discloses a kind of anti-false operation methods, device and equipment of relay protection device and storage medium, it is related to relay protection technical field, the method includes: according to target feature information and process layer equipment between virtual terminal mapping relationship setting information configuration table;According to information configuration table, the circuit breaker position and switch position of the equipment in first interval are obtained;When the switch of circuit breaker position and switch position is all in closed state, determine that first interval is in operating state;Current data and voltage data of first interval are obtained;According to the current data of first interval, first criterion is constructed;According to first criterion, whether first interval is in misoperation state is judged;If first interval is in misoperation state, then the protection function in the input state of dynamic control relay protection device is set to exit by input, the protection function in exit state remains unchanged, and protection anti-false operation is realized.The method effectively improves the accuracy and reliability of anti-false operation.

Description

Technical Field

[0001] This invention relates to the field of relay protection technology, and in particular to a method, device, equipment and storage medium for preventing maloperation of a relay protection device. Background Technology

[0002] In substation secondary maintenance practice, accurately isolating the logical and circuit connections between commissioning equipment and operating equipment is a crucial step in ensuring operational safety and power supply reliability. Currently, the industry primarily relies on the accuracy of secondary drawings, the technical experience of construction personnel, and manual execution of secondary safety measures to control the operation of protection devices during maintenance. For example, this involves manually verifying drawings to confirm circuit isolation boundaries, relying on the skill level of operators to complete secondary circuit wiring checks, and relying on on-site monitoring to perform operations such as putting on and taking off soft pressure plates, thereby avoiding misoperation that could affect operating equipment. Meanwhile, relay protection devices are designed based on speed requirements, with extremely short protection function action times, aiming to quickly isolate fault points when grid faults occur and ensure overall grid stability. This design concept has become a consensus within the industry for ensuring the safe operation of power systems.

[0003] However, existing technical solutions have significant shortcomings and cannot completely eliminate the risk of human error. Although existing protection devices have the advantage of rapid response, when faced with human error, the response is too fast for on-site personnel to react and handle the situation. After an error occurs, the protection device immediately disconnects the operating equipment. Moreover, such accidents are often characterized by high concealment, high cost of error, and irreversible consequences. Existing technologies lack effective prediction and interception mechanisms for such errors and cannot promptly lock out protection functions when errors occur. This makes it difficult to fundamentally eliminate the safety hazards caused by errors and poses a serious challenge to the safe operation of power grid equipment. Summary of the Invention

[0004] This invention provides a method, device, equipment, and storage medium for preventing maloperation of relay protection devices. It can configure and control the activation and deactivation of the soft pressure plate of operating equipment, avoiding maloperation caused by human error. It establishes a matching relationship between the differential protection device and the subscription sampled value (SV) interval, and can use the differential current value to determine whether the wiring of the current secondary circuit is correct, preventing maloperation caused by wiring errors. Moreover, the maloperation prevention strategy is compatible with existing protection device hardware and programs, and does not require power outage debugging and upgrades, making it highly applicable.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a method for preventing maloperation of a relay protection device, the method comprising:

[0007] Obtain the target feature information and the virtual terminal mapping relationship between process layer devices, and set an information configuration table according to the target feature information and the virtual terminal mapping relationship between process layer devices;

[0008] Based on the information configuration table and the preset anti-misoperation scenario judgment logic, determine the target object and the corresponding judgment type that need to be judged to prevent misoperation;

[0009] When the criterion type is a single-interval current anti-misoperation criterion, the target object is the first interval;

[0010] Obtain the circuit breaker position, first disconnector position, and second disconnector position of the equipment in the first bay according to the information configuration table;

[0011] When the switches in the circuit breaker position, the first disconnector position, and the second disconnector position are all in the closed state, it is determined that the first bay is in the operating state;

[0012] After determining that the first interval is in operation, the current data of the first interval is obtained from the information configuration table;

[0013] A first criterion is constructed based on the current data of the first interval;

[0014] Based on the first criterion, determine whether the first interval is in a misoperation state, and obtain the first judgment result;

[0015] If the first judgment result indicates that the first interval is in a malfunction state, then the protection function in the dynamic control relay protection device that is in the activated state is changed to the deactivated state, while the protection function in the deactivated state remains unchanged, thus achieving protection against maloperation.

[0016] In some possible implementations, the method further includes:

[0017] If the switch at the circuit breaker position is in the open state, the switch at the first disconnector position is in the closed state, and the switch at the second disconnector position is in the closed state, the first interval is determined to be either in standby or tripped state.

[0018] When the switch at the circuit breaker position is in the open state, the switch at the first disconnector position is in the open state, and the switch at the second disconnector position is in the closed state, the first interval is determined to be in the operating state.

[0019] After determining that the first bay is in standby, tripped, or operational state, it is confirmed again whether the switch at the second disconnector position is closed. If it is confirmed that the switch at the second disconnector position is closed, the bus protection is activated to receive the subscription sample value SV of the first bay via the soft pressure plate.

[0020] If the switches in the first disconnector position and the second disconnector position are in the open state, but the switch in the circuit breaker position is in the closed or open state, the first interval is determined to be in the maintenance state.

[0021] After determining that the first bay is under maintenance, it is confirmed again whether the switch at the second disconnector position is in the open state. If it is confirmed that the switch at the second disconnector position is in the open state, the bus protection automatically exits the subscription sampling value SV receiving soft pressure plate of the first bay.

[0022] In some possible implementations, the current data of the first interval includes the current protection setting value of the relay protection device associated with the first interval, the three-phase protection current of the first interval, the three-phase measured current of the first interval, and the rated current of the current transformer of the first interval; the construction of the first criterion based on the current data of the first interval includes:

[0023] The current difference of the first interval is obtained based on the three-phase protection current and the three-phase measurement current of the first interval, and the first sub-criteria is obtained based on the current difference of the first interval.

[0024] The second sub-criteria is derived based on the three-phase protection current of the first bay and the rated current of the current transformer;

[0025] The third sub-criteria is obtained based on the current protection setting value of the relay protection device associated with the first bay and the three-phase protection current of the first bay.

[0026] The first criterion is constructed based on the first sub-criterion, the second sub-criterion, and the third sub-criterion.

[0027] In some possible implementations, the method further includes:

[0028] When the criterion type is a multi-interval differential anti-misoperation criterion, the target objects are the second interval and the third interval;

[0029] Based on the information configuration table, obtain the circuit breaker position, first disconnector position and second disconnector position of the equipment in the second bay, and obtain the circuit breaker position, first disconnector position and second disconnector position of the equipment in the third bay;

[0030] If the circuit breaker position, the first disconnector position, and the second disconnector position of the equipment in the second bay are all in the closed state, and the circuit breaker position, the first disconnector position, and the second disconnector position of the equipment in the third bay are all in the closed state, it is determined that both the second bay and the third bay are in the operating state.

[0031] After determining that both the second and third intervals are in operation, the current data of the second and third intervals are obtained from the information configuration table.

[0032] A second criterion is constructed based on the current data of the second and third intervals;

[0033] Based on the second criterion, determine whether the second and third intervals are in a misoperation state, and obtain the second judgment result;

[0034] If the second judgment result indicates that the second and third intervals are in a malfunction state, then the protection function in the dynamic control relay protection device that is in the activated state is changed to the deactivated state, while the protection function in the deactivated state remains unchanged, thus achieving protection against maloperation.

[0035] In some possible implementations, the method further includes:

[0036] When the criterion type is the same bus voltage anti-mistake criterion, the target object is each interval connected on the same bus.

[0037] According to the information configuration table, obtain the circuit breaker position, first disconnector position and second disconnector position of the equipment in each bay connected to the same busbar;

[0038] When the switches in the circuit breaker position, the first disconnector position, and the second disconnector position are all in the closed state, it is determined that each bay connected to the same busbar is in the operating state.

[0039] After determining that each bay connected to the same busbar is in operation, the disconnector position of the voltage transformer of each bay connected to the same busbar is obtained according to the information configuration table.

[0040] When all switches in the disconnector position are closed, it is determined that the voltage transformer bays connected to each other on the same busbar are in operation.

[0041] Obtain the voltage data of each interval connected to the same busbar from the information configuration table;

[0042] A third criterion is constructed based on the voltage data of each interval connected to the same busbar;

[0043] The third criterion is used to determine whether each interval connected to the same busbar is in a malfunction state, and the third criterion result is obtained.

[0044] If the third judgment result indicates that each bay connected to the same busbar is in a malfunction state, then the protection function in the dynamic control relay protection device that is in the activated state is changed to the deactivated state, while the protection function in the deactivated state remains unchanged, thus achieving protection against maloperation.

[0045] In some possible implementations, the method further includes:

[0046] When the criterion type is cross-bus voltage comparison criterion, the target object is each bay connected to the same voltage transformer on different buses;

[0047] According to the information configuration table, obtain the circuit breaker position, first disconnector position and second disconnector position of the equipment in each bay connected to different busbars;

[0048] When the switches in the circuit breaker position, the first disconnector position, and the second disconnector position are all in the closed state, it is determined that each bay connected to different busbars is in the operating state.

[0049] After determining that each bay connected to different busbars is in operation, the voltage data of each bay connected to different busbars via the same voltage transformer is obtained from the information configuration table.

[0050] The fourth criterion is constructed based on the voltage data of each interval connected by the same voltage transformer on different busbars;

[0051] The fourth criterion is used to determine whether each bay connected to the same voltage transformer on different busbars is in a malfunctioning state, and the fourth criterion result is obtained.

[0052] If the fourth judgment result indicates that all the bays connected to the same voltage transformer under different busbars are in a maloperation state, then the protection function in the dynamic control relay protection device that is in the activated state will be changed to the deactivated state, while the protection function in the deactivated state will remain unchanged, thus achieving protection against maloperation.

[0053] Among some possible implementations,

[0054] The relay protection device's soft pressure plate includes a GOOSE output soft pressure plate, a protection function soft pressure plate, and a subscription sampled value (SV) receiving soft pressure plate. The method further includes:

[0055] When all soft pressure plates of the relay protection device are in the engaged state, it is allowed to exit the GOOSE output soft pressure plate. After confirming that all GOOSE output soft pressure plates have been exited, it is allowed to exit the protection function soft pressure plate. After confirming that all protection function soft pressure plates have been exited, it is allowed to exit the subscription sample value SV receiving soft pressure plate. After confirming that all subscription sample value SV receiving soft pressure plates have been exited, the exit operation of the soft pressure plate of the relay protection device is realized.

[0056] When all the soft switches of the relay protection device are in the off state, the soft switch for subscribing to the sampled value SV is allowed to be activated. After confirming that all the soft switches for subscribing to the sampled value SV are activated, the soft switch for protection function is allowed to be activated. After confirming that all the soft switches for protection function are activated, the soft switch for GOOSE output is allowed to be activated. After confirming that all the soft switches for GOOSE output are activated, the activation operation of the soft switches of the relay protection device is completed.

[0057] Secondly, the present invention provides a device for preventing maloperation of a relay protection device, the device comprising:

[0058] The setting module is used to set an information configuration table based on target feature information and the virtual terminal mapping relationship between process layer devices; based on the information configuration table and the preset anti-maloperation scenario judgment logic, it determines the target object and the corresponding criterion type that need to be performed for anti-maloperation judgment; when the criterion type is single-interval current anti-maloperation criterion, the target object is the first interval;

[0059] The judgment module is used to obtain the circuit breaker position, first disconnector position, and second disconnector position of the equipment in the first bay according to the information configuration table; when the switches at the circuit breaker position, the first disconnector position, and the second disconnector position are all in the closed state, the first bay is determined to be in the operating state; after determining that the first bay is in the operating state, the current data of the first bay is obtained from the information configuration table; a first criterion is constructed based on the current data of the first bay; and the first criterion is used to determine whether the first bay is in a malfunction state, and a first judgment result is obtained.

[0060] The protection module is used to dynamically control the protection function in the relay protection device that is in the activated state to the deactivated state if the first judgment result indicates that the first interval is in the malfunction state, while the protection function in the deactivated state remains unchanged, thereby achieving protection against maloperation.

[0061] Thirdly, the present invention provides a computing device, including a memory and a processor;

[0062] The memory stores one or more computer programs, the one or more computer programs including instructions; when the instructions are executed by the processor, the computing device performs the method as described in any one of the first aspects.

[0063] Fourthly, the present invention provides a computer-readable storage medium for storing a computer program for performing the method as described in any one of the first aspects.

[0064] Fifthly, the present invention provides a computer program product comprising one or more computer instructions, wherein when the computer instructions are executed by a computer, the computer performs the method as described in any one of the first aspects.

[0065] As can be seen from the above technical solution, the present invention has at least the following beneficial effects:

[0066] In this invention, the target feature information and the virtual terminal mapping relationship between process layer devices are obtained; an information configuration table is set up based on the target feature information and the virtual terminal mapping relationship between process layer devices, taking process layer intervals as units; the circuit breaker position, first disconnector position and second disconnector position of the devices in the first interval are obtained according to the information configuration table; when the switches at the circuit breaker position, first disconnector position and second disconnector position are all in the closed state, it is determined that the first interval is in the operating state; after determining that the first interval is in the operating state, the current data of the first interval is obtained from the information configuration table; a first criterion is constructed based on the current data of the first interval; the first criterion is used to determine whether the first interval is in a malfunction state, and a first judgment result is obtained; if the first judgment result indicates that the first interval is in a malfunction state, the protection function in the relay protection device that is in the activated state is set to the deactivated state, while the protection function in the deactivated state remains unchanged, thereby realizing protection against maloperation.

[0067] Existing technical solutions often rely on single state variables or simple logic to determine whether a relay protection device has malfunctioned. They lack comprehensive analysis and dynamic control of multi-dimensional information such as interval operating status and current data, making it difficult to identify complex maloperation scenarios. The reliability and accuracy of maloperation prevention need improvement. This invention, however, obtains target feature information and the mapping relationship between virtual terminals, sets up an information configuration table for process-level intervals, comprehensively judges the interval operating status based on the positions of circuit breakers and disconnectors, and then combines current data to construct criteria to determine maloperation states and dynamically control the relay protection device function. This achieves multi-dimensional and dynamic protection against maloperation, effectively improving the accuracy and reliability of maloperation prevention.

[0068] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this invention do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0069] Figure 1 A flowchart of a method for preventing maloperation of a relay protection device provided in an embodiment of the present invention;

[0070] Figure 2 This is a schematic diagram illustrating an access method for a data acquisition and processing device according to an embodiment of the present invention;

[0071] Figure 3 This is a schematic diagram of data acquisition and control of a data acquisition and processing device provided in an embodiment of the present invention;

[0072] Figure 4 This is a schematic diagram of the virtual terminal mapping relationship in a configuration description file for an intelligent substation provided in an embodiment of the present invention;

[0073] Figure 5 A flowchart of a soft pressure plate deployment / retraction sequence error prevention logic provided in an embodiment of the present invention;

[0074] Figure 6 A schematic diagram of an anti-maloperation device for a relay protection device provided in an embodiment of the present invention;

[0075] Figure 7 This is a schematic diagram of a computing device provided in an embodiment of the present invention. Detailed Implementation

[0076] The terms "first," "second," and "third," etc., used in this specification and description of the drawings are used to distinguish different objects, rather than to limit a specific order.

[0077] In embodiments of the present invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in embodiments of the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0078] To ensure clarity and conciseness in the description of the following embodiments, a brief introduction to the related technologies is given first:

[0079] The Substation Configuration Description (SCD) is a core configuration file that conforms to the IEC 61850 standard. It is used to fully describe the key information of the entire smart substation, such as equipment composition, topology, signal association, and communication parameters. It is a digital blueprint for the design, commissioning, operation and maintenance of smart substations and information exchange between equipment.

[0080] Currently, based on the analysis of relay protection technology principles and substation secondary maintenance accident cases, human error can be mainly categorized into several types: accidental contact with AC secondary circuits, incorrect wiring of AC secondary circuits, and misoperation of relay protection device parameter settings. Accidental contact with voltage secondary circuits can cause malfunctions in protection functions that rely on voltage as the operating condition, such as distance protection and undervoltage protection. Accidental contact with current secondary circuits can lead to malfunctions in protection functions that rely on current as the operating basis, such as differential protection and zero-sequence current directional protection. Furthermore, incorrect circuit wiring and incorrect operation of protection setting parameters (such as settings and soft pressure plates) can also cause relay protection devices to malfunction. Considering the requirement for rapid operation of relay protection, the operating time of protection functions is usually extremely short. Once a maloperation occurs, on-site personnel have almost no time to react and handle the situation; the relay protection device will immediately disconnect the operating equipment, ultimately causing a power outage. In summary, human error is characterized by its high degree of concealment, high cost of error, and irreversible consequences. Therefore, in order to ensure the safe and stable operation of power grid equipment and eliminate the risks caused by misoperation, this patent specifically conducts in-depth research on the anti-misoperation strategy of relay protection devices.

[0081] In view of this, embodiments of the present invention provide a method for preventing maloperation of a relay protection device. In this method, target feature information and the virtual terminal mapping relationship between process-level devices are obtained; an information configuration table is set up based on the target feature information and the virtual terminal mapping relationship between process-level intervals; the circuit breaker position, first disconnector position, and second disconnector position of the devices in the first interval are obtained according to the information configuration table; when the switches at the circuit breaker position, first disconnector position, and second disconnector position are all in a closed state, the first interval is determined to be in an operating state; after determining that the first interval is in an operating state, the current data of the first interval is obtained from the information configuration table; a first criterion is constructed based on the current data of the first interval; the first criterion is used to determine whether the first interval is in a maloperation state, and a first judgment result is obtained; if the first judgment result indicates that the first interval is in a maloperation state, the protection function in the relay protection device that is in the activated state is dynamically controlled to be set from the activated state to the deactivated state, while the protection function in the deactivated state remains unchanged, thereby achieving protection against maloperation. This invention obtains target feature information and virtual terminal mapping relationship, sets information configuration table in process layer intervals, judges interval operation status by comprehensively considering the positions of circuit breakers and disconnectors, and then constructs criteria based on current data to judge maloperation state and dynamically controls the function of relay protection device, realizing multi-dimensional and dynamic protection against maloperation, effectively improving the accuracy and reliability of maloperation prevention.

[0082] To make the technical solution of the present invention clearer and easier to understand, the following description, in conjunction with the accompanying drawings, introduces a method for preventing maloperation of a relay protection device provided by an embodiment of the present invention. Figure 1 As shown in the figure, this is a flowchart of a method for preventing maloperation of a relay protection device provided by an embodiment of the present invention.

[0083] This method is applied to a data acquisition and processing device connected to the station control layer switch of an IEC61850 intelligent substation via a standard network cable. The device is configured with an SCD file to enable real-time communication with all protection and control devices at the bay level. The device can be configured with an A-port or dual-port design, and its IP address meets the requirements of the station control layer network segment address and subnet mask. The device achieves one-to-one communication with all protection and control devices at the station control layer through the IP address and MAC address of the network port. Figure 2As shown in the diagram, this illustrates the access method of the data acquisition and processing device at the intelligent substation control layer. The device connects to the substation control layer switch via a standard network cable, and then to the monitoring system and protection devices (Protection 1, Protection 2, ..., Protection N) at the control layer. This enables communication with all protection and control devices at the control layer. The monitoring system typically refers to the substation's monitoring backend or advanced application system, used for real-time monitoring, control, data storage, and alarm functions for all substation equipment. The data acquisition and processing device can upload key information such as anti-misoperation judgment results, device status, and alarm signals to this monitoring system, providing a human-machine interface for operators. It can also receive queries or control commands from the monitoring system, forming a complete anti-misoperation interlocking information flow.

[0084] The data acquisition and processing device is equipped with an SCD file system to ensure real-time communication with the bay-level protection and control devices. It can also be configured with A and B network ports, whose IP addresses conform to the design requirements of the station control layer network segment address and subnet mask. Furthermore, it can achieve one-to-one communication with all protection and control devices at the station control layer using the IP and MAC addresses of the network ports, thereby realizing data interaction and transmission functions. Next, as... Figure 3 As shown in the diagram, this figure illustrates the data acquisition and control logic of the data acquisition and processing device for process-level intelligent components (such as bay 1, bay 2, bay 3... bay N) and bay-level protection devices (protection 1, protection 2, protection 3... protection N). The data acquisition and processing device can acquire data from both process-level intelligent components and bay-level protection devices, and can also control the protection devices, such as sending direct control signals, modifying parameters, and sending digital signals. This enables the acquisition of relay protection-related data and the regulation of the operating status and functions of the protection devices, providing data support and control methods for preventing maloperation of the relay protection devices.

[0085] The methods for preventing maloperation of the relay protection device include:

[0086] S101. Obtain the target feature information and the virtual terminal mapping relationship between process layer devices, and set the information configuration table according to the target feature information and the virtual terminal mapping relationship between process layer devices.

[0087] The virtual terminal mapping relationships between process-layer devices are learned based on the Substation Configuration Description (SCD) file, and feature information is extracted. These process-layer devices include substation protection, measurement and control devices, and intelligent components. The specific process is as follows:

[0088] The SCD file is the core configuration file for the entire smart substation, covering detailed information on all intelligent electronic devices within the station. When studying the process-level intelligent electronic devices (IEDs) in the SCD, the focus is first on the device's IEDname field. This field has specific naming rules, including characteristic fields such as IMT, IML, and MM. By identifying these characteristic fields, different types of process-level intelligent components can be quickly distinguished, such as merging units (primarily responsible for acquiring and digitizing analog quantities such as current and voltage, providing sampled values ​​for protection and control devices), intelligent terminals (used to receive and execute control commands such as tripping and closing from protection devices, and to acquire position signals from primary equipment such as circuit breakers and disconnectors), or integrated intelligent devices (combining the functions of merging units and intelligent terminals, with a higher degree of integration). After identifying the device type, the model information of these intelligent components is further extracted from the SCD, including the device's communication parameters (such as IP address, MAC address, communication port, etc.), supported datasets (such as sampled value datasets, Generic Object Oriented Substation Event (GOOSE) datasets), functional descriptions, etc., laying the foundation for subsequent feature information extraction and device feature information model construction.

[0089] After completing the learning of the process layer intelligent components, deep extraction is performed from the CID (IED Configuration Description) model dataset of the intelligent components based on the virtual terminal mapping relationship between the intelligent components in the SCD and the bay layer equipment (such as protection devices, measurement and control devices, etc., which are located in the bay layer and are responsible for the protection judgment, measurement and control of electrical quantities in this bay).

[0090] Key electrical quantity information extraction includes three-phase protective current (used by relay protection devices to determine faults, such as differential protection and overcurrent protection, which rely on protective current for logical operations), three-phase measured current (mainly collected by monitoring and control devices to monitor current parameters during equipment operation and provide data for scheduling, metering, etc.), and three-phase voltage (also divided into protective voltage and measured voltage; protective voltage participates in protection logic judgment, while measured voltage is used to monitor system voltage levels). Through virtual terminal mapping relationships, the path of these electrical quantities from process-level intelligent components (such as merging units) to bay-level equipment (such as protection and monitoring and control devices) can be clearly defined.

[0091] The extraction of primary equipment location information, such as circuit breaker position and disconnector position signals, reflects the operating status of the primary equipment (e.g., whether the circuit breaker is closed or open, and the position of the disconnector). This information is crucial for determining the operating status of the bay; for example, when determining whether a bay is in operation, it is necessary to combine the position information of the circuit breaker and disconnector.

[0092] Subscription-side information extraction involves extracting information about the corresponding interval-level devices (such as device name, ID, and assigned interval) and internal address information (i.e., the internal data address of the interval-level devices that receive these electrical quantities and position signals, ensuring accurate delivery of data to the designated module of the target device). Integrating these extracted features allows the construction of a device feature information model. This model includes a mapping of key information from the process layer to the interval-level devices, providing data support for subsequent error-prevention logic judgments.

[0093] In summary, based on the virtual terminal mapping relationship between intelligent components and bay layer devices in SCD, feature information such as three-phase protection current, three-phase measurement current, three-phase voltage, circuit breaker position and disconnector position, as well as the corresponding bay layer device information and subscription internal address information are extracted from the intelligent component CID model dataset.

[0094] To make the technical solution of the present invention clearer, the present invention provides a schematic diagram of the virtual terminal mapping relationship of an SCD file for supplementary explanation, such as... Figure 4 As shown:

[0095] Taking the extraction of the MIT1102 model information from the SCD as an example, as shown in the figure, this integrated intelligent device combines the functions of a merging unit and an intelligent terminal, enabling simultaneous processing of analog signal acquisition and control command execution. It has virtual terminal mapping relationships with the PT1102 protection device for the No. 2 main transformer (responsible for protecting the No. 2 main transformer and quickly isolating faults when they occur), the PM1101 busbar protection device (used to protect the busbar and prevent busbar faults from affecting the power supply of the entire substation), and the CT1102 high-voltage side measurement and control device for the No. 2 main transformer (measuring and monitoring electrical quantities on the high-voltage side of the No. 2 main transformer to provide data for operators). Considering factors such as the amount of modeling information, program processing speed, and removal of redundant information, only the feature information directly related to the anti-misoperation logic is extracted from this mapping relationship. This includes the bay's protective current (used by the No. 2 main transformer protection PT1102 and bus protection PM1101 for protection logic judgment), the measured current (used by the No. 2 main transformer high-voltage side monitoring CT1102 for measurement and monitoring), and the positions of circuit breakers and disconnectors (used to determine the bay's operating status, providing a status basis for anti-misoperation). This ensures the completeness of the key information required for anti-misoperation logic judgment while avoiding the impact of excessive redundant information on program processing speed, making the model more efficient.

[0096] Furthermore, from the model of process-level intelligent components (such as integrated intelligent devices), it is also necessary to extract the device's own state signals, such as... Figure 4 The device malfunction signals shown are GO single point 1 and control return disconnection signals, namely GO single point 2.

[0097] Device malfunction signals are used to reflect the hardware, software, or communication health status of the intelligent component itself. An abnormal signal indicates that the data source is unreliable. When the acquisition and processing device receives this signal, it should treat it as a latching condition or a high-priority alarm, prompting that the intelligent component itself needs to be checked.

[0098] The control circuit disconnection signal is used to indicate the connection status of the operating circuit between the smart terminal and the primary equipment (such as circuit breakers and disconnectors). An abnormal signal means that the control command may not be executed correctly, and the data acquisition and processing device can use this to determine the reliability of the location information.

[0099] Extracting these status signals and incorporating them into the information configuration table helps to achieve more comprehensive status awareness and further improves the reliability of the anti-malfunction strategy.

[0100] Then, using process layer intervals as units, the extracted target feature information is combined with the virtual terminal mapping relationship between process layer devices to set up the information configuration table. Specifically, it includes four types of information: analog quantities (current), analog quantities (voltage), digital quantities (position), and digital quantities (soft pressure plate), as shown in Tables 1-3:

[0101] Table 1: Analog Quantity (Current) Information Configuration Table

[0102]

[0103] Table 1 Information Description: Column A1 - Interval Name; Column B1 - Publishing IED; Column C1 - External Index; Column D1 - Internal Address; Column E1 - Subscribed IED. Each row represents a pair of virtual terminal mapping relationships between intelligent components and protection and control devices.

[0104] Table 2: Analog Quantity (Voltage) Information Configuration Table

[0105]

[0106] Table 2 Information Description: Column A2 - Interval Name; Column B2 - Publishing IED; Column C2 - External Index; Column D2 - Internal Address; Column E2 - Subscribed IED. Each row represents a pair of virtual terminal mapping relationships between intelligent components and protection and control devices.

[0107] Table 3: Analog Quantity (Location) Information Configuration Table

[0108]

[0109] Table 3 Information Description: Column A3 - Interval Name; Column B3 - Publishing IED; Column C3 - External Index; Column D3 - Internal Address; Column E3 - Subscribed IED. Each row represents a pair of virtual terminal mapping relationships between intelligent components and protection and control devices.

[0110] Note: Column C - External Index and Column D - Internal Address in the configuration table are the primary key information for the virtual terminal mapping relationship. The SV information flow is described in the format LD (Logical Device) / LN (Logical Node).DO (Data Object); the GOOSE information flow is described in the format LD (Logical Device) / LN (Logical Node).DO. (Data Object).DA (Data Attribute). (Explain the index information format of SV and GOOSE in columns C and D of the table.)

[0111] During the setup process, it is essential to ensure that all characteristic information and virtual terminal mapping relationships corresponding to each process layer interval are accurately entered into the information configuration table. This table should reflect the association status and key parameters of the equipment within the process layer interval, providing reliable data support for subsequent interval status determination, anti-misoperation identification, and other tasks based on this table.

[0112] Specifically, the data in the information configuration table is compared with the data in the virtual terminal mapping relationship between process layer devices. Data that does not correspond between the information configuration table and the virtual terminal mapping relationship between process layer devices is marked. Feature extraction or manual operation is performed again to correct the data that does not correspond between the information configuration table and the virtual terminal mapping relationship between process layer devices, and the marking is removed after correction. The number of all bay intelligent components in the information configuration table is counted. The number of all bay intelligent components in the information configuration table is compared with the number of intelligent electronic devices in the intelligent substation configuration description file. If the comparison result shows that the number of all bay intelligent components in the information configuration table is consistent with the number of intelligent electronic devices in the intelligent substation configuration description file, then the corrected information configuration table is obtained.

[0113] In some embodiments, the matching relationships in columns C (external index) and D (internal address) of the configuration table are semantically matched and verified against the virtual terminal table (.xls) exported from the SCD file to verify the accuracy of the extracted device feature information, i.e., the virtual terminal mapping relationship. For example, if the mapping relationship between C1_7 and D1_7 does not correspond to the virtual terminal table, it is marked as an error message, and the feature information is extracted again or manually corrected to ensure that the index address correspondence is accurate. Column A (interval name) is checked row by row from row 1 to row N1. A counter is set, initially counted to 0. When a different interval number is detected, the counter is incremented by 1. The number of intelligent components in all intervals in the configuration table is counted and compared with the number of IEDs in the SCD file to confirm whether the information configuration table covers all process-level intelligent components of the substation without omissions or duplications.

[0114] Collect information from each row of the above configuration table and define labels. The cells start from A_1 to A_N and are sequentially marked with interval numbers. For example, the interval for 102 is (1), the interval for 202 is (2)..., that is, the i-th interval is (i); define labels for the C column (dataset information) information of the same interval.

[0115] Specifically as follows:

[0116] MUSV / UATVTR1.Vol1 (A-phase protection voltage) is defined as U A(i) ;

[0117] MUSV / UBTVTR1.Vol1 (Phase B protection voltage) is defined as U B(i) ;

[0118] MUSV / UCTVTR1.Vol1 (C-phase protection voltage) is defined as U C(i) ;

[0119] MUSV / PATCTR1.Amp1 (A-phase protection current) is defined as I AP(i) ;

[0120] MUSV / PBTCTR1.Amp1 (Phase B protection current) is defined as I BP(i) ;

[0121] MUSV / PCTCTR1.Amp1 (C-phase protection current) is defined as I CP(i) ;

[0122] MUSV / MATCTR1.Amp1 (A-phase measurement current) is defined as I AM(i) ;

[0123] MUSV / MBTCTR1.Amp1 (B-phase current measurement) is defined as I BM(i) ;

[0124] MUSV / MCTCTR1.Amp1 (C-phase current measurement) is defined as I CM(i) ;

[0125] RPIT / XCBR.Pos.stVal (circuit breaker position) is defined as P XC(i) ;

[0126] RPIT / XSWI1.Pos.stVal (first disconnector position) is defined as P XS1(i) ;

[0127] RPIT / XSWI2.Pos.stVal (second disconnector position) is defined as P XS2(i) ;

[0128] Further extracting information from Tables 1 and 2, a matching relationship is established for the protection and control devices in columns E1 and E2 that have virtual terminal logical associations with the intelligent components in columns A1 and A2, as shown in Table 4. That is, the i-th row represents the i-th intelligent component in the SCD, and columns C4, D4, and E4 represent all protection and control devices associated with the i-th intelligent component.

[0129] Table 4 Lockout Logic Table

[0130]

[0131] Table 4 Information Description: Column A4 - Interval Name; Column B4 - Intelligent Component (IED); Column C4 - Associated Device 1; Column D4 - Associated Device 2; Column D4 - Associated Device 3.

[0132] S102. Obtain the circuit breaker position, first disconnector position, and second disconnector position of the equipment in the first bay according to the information configuration table.

[0133] A bay refers to a relatively independent area or group of equipment in a substation, divided according to electrical connections and functions. Each bay typically contains equipment such as circuit breakers, disconnect switches (knife switches), current transformers, and voltage transformers, and is responsible for the power transmission, protection, and control functions of specific lines, transformers, or other electrical equipment.

[0134] Based on the information configuration table and the preset anti-maloperation scenario judgment logic, the target object and corresponding criterion type for which anti-maloperation judgment needs to be performed are determined. The preset anti-maloperation scenario judgment logic refers to the decision logic that automatically identifies the type of anti-maloperation judgment to be performed and its corresponding target object under the current substation operating status based on the equipment association relationship, electrical topology extracted from the information configuration table and the preset anti-maloperation rules.

[0135] The core of this logic is to dynamically select the anti-false judgment criteria applicable to the current scenario based on the virtual terminal connection relationship of process layer equipment, the operating status of primary equipment, and the dependency relationship of protection functions.

[0136] Specifically, this judgment logic includes, but is not limited to, the following scene recognition rules:

[0137] In the single-interval current protection scenario, when an independent interval is detected to be in operation and its associated protection device is functioning as current protection (such as overcurrent protection), the single-interval current protection criterion is triggered, and the target object is that independent interval.

[0138] In the multi-interval differential protection scenario, when a differential protection device is identified and its associated two or more intervals are in operation, the multi-interval differential protection criterion is triggered. The target objects are the multiple intervals involved in the differential calculation.

[0139] In the scenario of preventing voltage errors on the same bus, when it is determined that multiple bays are connected to the same bus and the voltage transformer of that bus is in operation, the error prevention criterion for the same bus is triggered. The target object is all the operating bays connected to that bus.

[0140] In cross-bus voltage comparison scenarios, when it is necessary to monitor the voltage consistency of different buses or to determine whether there is a voltage loop malfunction, the cross-bus voltage comparison criteria are triggered. The target objects are the various bays connected to different buses through the same voltage level or the same PT.

[0141] Through the above scenario judgment logic, the system can adaptively select the most appropriate anti-maloperation strategy to identify and protect against various types of maloperation under complex operating conditions of substations.

[0142] When the criterion type is a single-interval current anti-misoperation criterion, the target object is the first interval; the first interval is the one designated or ranked first among multiple electrical intervals. In this invention, the various operations on the first interval, such as obtaining its equipment location, current data, and determining its operating status, are for the purpose of using this interval as a specific object to carry out related research and applications such as relay protection device anti-misoperation. Through the analysis and control of a single interval, the results can be extended to the interval management and protection strategy implementation of the entire substation.

[0143] Based on a pre-configured information table, the system locates the entry related to the first bay. The information configuration table details the identifiers, communication addresses, and relationships with other devices within the first bay. Using communication parameters stored in the table, such as device IP addresses and port numbers, the system establishes data communication connections with the circuit breakers, first disconnectors, and second disconnectors in the first bay. Then, following the information reading instruction format specified in the configuration table, the system sends location information query commands to these devices. Upon receiving the command, the devices return their current location status in a specific data format, such as whether the circuit breaker is closed or open, and whether the first and second disconnectors are closed or open. Finally, the returned data is parsed and verified to ensure its accuracy and completeness, thereby obtaining the positions of the circuit breakers, first disconnectors, and second disconnectors within the first bay.

[0144] S103. When the switches in the circuit breaker position, the first disconnector position, and the second disconnector position are all in the closed state, it is determined that the first bay is in the operating state.

[0145] The operating status of the first bay is determined by the circuit breaker position P. XC First disconnect switch position P XS1 and the second disconnector position P XS2 Make a judgment. Note: The first disconnect switch represents the -2 disconnect switch (line side), and the second disconnect switch represents the -4 disconnect switch (busbar side). Since the voltage transformer (PT) is switched on and off via disconnect switches, the position of the disconnect switch P is used to determine its status. XS Determine the operating status of PT.

[0146] Define the position representation of the circuit breaker or isolating switch as follows: "1" for closed, "0" for open. The following states 1-7 represent various states of the first bay: State 1: P XS1 =1, P XS2 =1, P XC =1, determine the first interval as running state; State 2: P XS1 =1, P XS2 =1, P XC =0, indicating the first bay is in standby / tripped state; State 3: P XS1 =0, P XS2 =0, P XC =1 or 0, indicating the first interval is in maintenance status; Status 4: P XS1 =0, P XS2 =1, P XC =0, the first interval is determined to be an operation state; State 5: P XS =1, indicating the PT interval is in operation; State 6: P XS =0, the PT interval is determined to be in maintenance status; Status 7: all other cases are determined to be in error status.

[0147] After obtaining the positions of the circuit breaker, first disconnect switch, and second disconnect switch in the first bay, these positions are checked one by one. First, the position of the circuit breaker is checked. If the circuit breaker is closed, it means that current can flow through the circuit containing the circuit breaker. Next, the position of the first disconnect switch is checked. When the first disconnect switch is closed, it can provide electrical connection to the relevant lines or equipment. Then, the position of the second disconnect switch is checked. Only when the second disconnect switch is also closed can the electrical circuit in the first bay form a complete circuit. Only when the switches for the circuit breaker, first disconnect switch, and second disconnect switch are all closed (state 1) can the electrical equipment in the first bay be normally connected to the system for power transmission or equipment operation. Only then can the first bay be determined to be in operation.

[0148] If the position of any of the devices does not meet the closed state, then the electrical circuit of the first interval will have a break and cannot operate normally, and therefore cannot be determined to be in operation.

[0149] S104. After determining that the first interval is in operation, obtain the current data of the first interval from the information configuration table.

[0150] After determining that the first bay is in operation through step S103, the current data of the first bay is retrieved again using the information configuration table. The information configuration table records in detail the source device (such as merging unit, intelligent terminal, and other process-level devices), data type (including three-phase protection current, three-phase measurement current, etc.), and data transmission path and interface information for bays in operation. First, the relevant current data entry for the first bay is located in the information configuration table, clearly identifying the process-level device providing the current data. Then, based on the communication parameters recorded in the configuration table, a data communication connection is established with these process-level devices. Next, a current data retrieval command is sent to the corresponding process-level device according to the current data request format specified in the configuration table. Upon receiving the command, the process-level device filters the current data belonging to the first bay (such as the real-time three-phase current value of the bay in operation) from its collected or stored current data and returns it in a standard data format (such as the sampling value message format conforming to IEC 61850-9-2 standard). Finally, the feedback current data is analyzed and verified to ensure its accuracy and timeliness, thus successfully obtaining the current data for the first interval, providing basic data support for subsequent operations such as constructing criteria based on the current data.

[0151] S105. Construct a first criterion based on the current data of the first interval.

[0152] In the practical application of secondary maintenance work, it is impossible to simultaneously operate the protection current circuit and the measuring current circuit (referring to the hard cable circuit connected to the merging unit) synchronously when debugging the current circuit. That is, there is no possibility of the protection current circuit and the measuring current circuit simultaneously experiencing the same type of accidental contact. Accidental contact with the protection current circuit will cause abnormalities in the protection current data without affecting the measuring current; similarly, accidental contact with the measuring current circuit will cause abnormalities in the measuring current data without affecting the protection current. It should be further clarified that this invention is applicable to the protection anti-maloperation method in operating intelligent substations, and there is no situation where both the protection and measuring current circuits are incorrectly wired. Therefore, this invention compares and verifies the protection current and measuring current of the same equipment bay to accurately identify the bay status.

[0153] The current data of the first interval includes the current protection setting value of the relay protection device associated with the first interval, the three-phase protection current of the first interval, the three-phase measurement current of the first interval, and the rated current of the current transformer of the first interval.

[0154] The current difference in the first interval is obtained based on the three-phase protection current and the three-phase measurement current of the first interval, and the first sub-criteria is derived based on the current difference in the first interval; specifically including:

[0155] Since the CPU processing elements of the protection device and the measurement and control device have the same sampling rate for the SV (analog signal) information stream, which is 4000 frames per second, the amount of data in the same time interval is the same, thus meeting the conditions for comparison calculation. For example, the elements in the first interval, i.e., interval i, the data set, namely the A-phase protection current and the A-phase measurement current, are calculated. The same calculation is performed on phases B and C. The calculation method is shown in formula (1):

[0156] Formula (1);

[0157] The first sub-criterion is obtained based on the current difference in the first interval, as shown in formula (2):

[0158] Formula (2);

[0159] in, This represents the protection coil transformation ratio of the current transformer in the i-th interval. The measured coil ratio value of the i-th interval current transformer is obtained from the corresponding merging unit configuration; This represents the A-phase protection current in the i-th interval. This represents the B-phase protection current in the i-th interval. This represents the C-phase protection current of the i-th interval; This represents the measured current of phase A in the i-th interval. This represents the measured current of phase B in the i-th interval. This represents the measured current of phase C in the i-th interval; This represents the difference between the protective current of phase A and the measured current of phase A in the i-th interval. This represents the difference between the protective current of phase B in the i-th interval and the measured current of phase B. denoted by , represents the difference between the C-phase protection current and the C-phase measured current in the i-th interval; D represents the discrimination threshold.

[0160] Next, the second sub-criteria is obtained based on the three-phase protection current of the first bay and the rated current of the current transformer; specifically including:

[0161] When a severe short-circuit fault occurs in the power grid equipment, the protection stage coil of the current transformer can correctly transmit the fault current due to its long linear region, while the measuring stage coil will be unable to correctly transmit the fault current due to its own saturation. Therefore, when a severe fault occurs in the power grid, there may be a difference between the in-phase protection current and the measuring current. Thus, a second sub-criteria is obtained based on the three-phase protection current of the first bay and the rated current of the current transformer. The second sub-criteria is shown in formula (3).

[0162] Formula (3);

[0163] In formula (3), the max function represents taking the maximum value of the relevant elements; This represents the rated current of the i-th interval current transformer; The saturation coefficient of the current transformer can be taken as 2 to 4 based on actual operating experience.

[0164] Then, based on the current protection setting value of the relay protection device associated with the first bay and the three-phase protection current of the first bay, a third sub-criteria is obtained; specifically including:

[0165] Whenever a fault occurs in the power grid, the corresponding protection devices must reliably operate to disconnect the fault point. Even equipment in a malfunctioning state must instantaneously activate its protection function when a fault current occurs. Therefore, a third sub-criteria is obtained based on the current protection setting value of the relay protection device associated with the first bay and the three-phase protection current of the first bay. The third sub-criteria is shown in formula (4):

[0166] Formula (4);

[0167] In formula (4), the Θ function represents the CPU logic element of the protection device for I. Ap(i) I Bp(i) I Cp(i) The effective value calculation or fault component extraction follows the hardware design and software algorithm of the protection device, and its output value is used in conjunction with the current protection setting value. In comparison, I set(i)This represents the current protection setting value of the protection device associated with the i-th interval.

[0168] Then, based on the first sub-criteria, the second sub-criteria, and the third sub-criteria, a first criterion is constructed as follows:

[0169] ①If formulas (2), (3), and (4) are all true, then the first interval is determined to be normal.

[0170] ②If formula (2) is not true and formula (3) is true, then the first interval is determined to be an erroneous operation state;

[0171] ③ If formula (2) and formula (3) are true and formula (4) is false; or if formula (2), formula (3) and formula (4) are all false, then the first interval is determined to be a fault state;

[0172] ④ If formula (2) is not valid, formula (3) is valid, and formula (4) is not valid after a delay of 200ms, then the first interval is determined to be in a fault state.

[0173] If a device that is already in a malfunctioning state is subsequently compounded by a system fault, the interval should be classified as a fault state.

[0174] The normal state refers to the position status of equipment (such as circuit breakers, disconnectors, etc.) within the interval that meets the operating requirements, the electrical quantity data such as current and voltage are within the reasonable range when the system is operating normally, there is no human error or equipment failure, the relay protection device operates according to normal logic, and there is no need to trigger anti-maloperation or fault protection actions.

[0175] Misoperation state refers to an abnormal electrical quantity data in the interval caused by human factors such as accidental contact with the AC secondary circuit, incorrect wiring of the AC secondary circuit, or setting parameters of the misoperation protection device (such as setting value, soft pressure plate, etc.), but not caused by the equipment itself. In this case, the relay protection device is at risk of maloperation and the anti-maloperation mechanism needs to be triggered.

[0176] A fault state refers to an actual power system fault occurring within the interval, such as a short circuit or grounding, causing electrical quantities such as current and voltage to exceed the normal operating range and meet the fault criteria of the relay protection device. In this case, the relay protection device should act quickly according to the preset protection logic to disconnect the faulty part and ensure the safety of the power system.

[0177] S106. Determine whether the first interval is in an erroneous state based on the first criterion, and obtain the first judgment result.

[0178] Based on a pre-constructed first criterion, the system determines whether the first bay is in a malfunctioning state, thus obtaining a first judgment result. First, the specific content of the first criterion is clarified. This criterion is constructed based on multi-dimensional information such as the current data and equipment position status of the first bay, covering the reasonable range of various parameters under normal operation and the abnormal characteristics of parameters during malfunction. Then, the actual operating data of the first bay obtained in the previous steps is substituted into the first criterion. During the substitution process, each data point is analyzed and calculated individually. For example, the difference between the three-phase protection current and the measured current is calculated to determine whether this difference exceeds the normal range; or the matching between the equipment position status and the current data is checked to see if there are cases where the position status is normal but the current data is abnormal. Through comprehensive analysis of these data and comparison with the first criterion, it is determined whether the first bay is in a malfunctioning state, ultimately obtaining the first judgment result.

[0179] S107. If the first judgment result indicates that the first interval is in a malfunction state, the protection function in the dynamic control relay protection device that is in the activated state is changed to the deactivated state, while the protection function in the deactivated state remains unchanged, thereby achieving protection against maloperation.

[0180] If the initial judgment indicates that the first bay is in a malfunctioning state, the dynamic control process for the relay protection device will be initiated to prevent maloperation. Specifically, the system will monitor the current status of each function of the relay protection device in real time. For relay protection device functions that are in the active state, their status will be dynamically changed from active to inactive through specific control commands and communication protocols. This prevents these protection functions from triggering tripping or other actions due to misjudgment in the event of maloperation, thereby preventing accidents. For relay protection device functions that are already in the inactive state, their inactive state will remain unchanged without additional operation, ensuring the simplicity and accuracy of system control. Through this dynamic control method, maloperation of the relay protection device due to the maloperation of the first bay can be effectively avoided, ensuring the safe and stable operation of the substation.

[0181] S108. If the first judgment result indicates that the first interval is not in a malfunction state, then the first interval is determined to be in a normal state or a fault state.

[0182] S109. If the first interval is in a normal state, the functional state of the protection device associated with the first interval remains unchanged.

[0183] If the first interval is in a normal state, the functional state of the protection device associated with the first interval remains unchanged, that is, instantaneous protection is off and delayed protection is on.

[0184] S110. If the first bay is in a fault state, the function of the dynamic control relay protection device is changed from the off state to the on state, and the function of the relay protection device in the on state remains unchanged.

[0185] If the first bay is in a fault state, the function of the protection device associated with the first bay is changed from 0 to 1, while the protection function that was originally in state 1 remains unchanged.

[0186] In some embodiments, when the criterion type is a multi-interval differential anti-misoperation criterion, the target objects are the second interval and the third interval; the circuit breaker position, the first disconnector position and the second disconnector position of the equipment in the second interval and the third interval are obtained according to the information configuration table;

[0187] If the circuit breaker position, the first disconnector position, and the second disconnector position of the equipment in the second and third bays are all in the closed state, it is determined that both the second and third bays are in the operating state.

[0188] After determining that both the second and third intervals are in operation, the current data of the second and third intervals are obtained from the information configuration table.

[0189] A second criterion is constructed based on the current data of the second and third intervals; specifically including:

[0190] In this invention, the second interval refers to the differential protection device j matching the p-th interval; the third interval refers to the differential protection device j matching the q-th interval.

[0191] As the relay protection principle states, differential protection requires that the polarity of the wiring in each branch current loop be consistent; otherwise, incorrect wiring or loop abnormalities will cause the differential protection to malfunction (this situation is different from malfunction caused by accidental contact with the current loop). Based on the configuration information table, column E1 extracts the device information for transformer protection (PT) and bus protection (PM), and the corresponding column C1 for rows with the same device information is marked with the associated interval protection current. For example, PT1102 is associated with C1_1, C1_2, C1_3 of interval 102 and C1_10, C1_11, C1_12 of interval 202; further explained, differential protection device j matches the three-phase protection current of the p-th interval. and the three-phase protection current of the qth interval If the differential protection has a significant differential current due to human error in wiring, the load current on the load side should be the normal amplitude load current. Considering that when a fault occurs within the differential protection range, the current of the fault phase on the load side is 0, the state criteria are constructed accordingly, as shown in formulas (5) to (7).

[0192] = Formula (5);

[0193] Formula (6);

[0194] Formula (7);

[0195] in: This represents the three-phase differential current of differential protection device j. This represents the three-phase differential current of differential protection device j. Δ represents the three-phase differential current of differential protection device j; Δ represents the differential current calculation operator of the device; E represents the first set threshold, which should be set to avoid the normal unbalanced current of the system and the line capacitance current. For short lines with voltage levels of 110kV and below, E can be set to 50A in this application; for short lines with voltage levels of 220kV and above, E can be set to 200A in this application; the min function represents taking the minimum value in the set of elements. This means that among six given currents, the smallest current has a value of 0. To match the A-phase protection current of the p-th bay to the differential protection device j, To match the B-phase protection current of the p-th bay to the differential protection device j, To match the C-phase protection current of the p-th bay to the differential protection device j, To match the A-phase protection current of the q-th bay to the differential protection device j, To match the B-phase protection current of the q-th bay to the differential protection device j, Match the C-phase protection current of the q-th bay to the differential protection device j.

[0196] A second criterion is constructed based on the state criterion, and the second criterion is as follows:

[0197] ①If formula (6) holds true, then the second and third intervals are determined to be normal.

[0198] ②If neither formula (6) nor formula (7) is valid, then the second interval and the third interval are determined to be in an erroneous state;

[0199] ③If formula (7) is true, then the second and third intervals are determined to be in a fault state.

[0200] Based on the second criterion, determine whether the second and third intervals are in a misoperation state, and obtain the second judgment result;

[0201] Based on the pre-constructed second criterion, it is determined whether the second and third intervals are in a malfunction state to obtain the second judgment result.

[0202] If the second judgment result indicates that the second and third intervals are in a malfunction state, then the protection function in the dynamic control relay protection device that is in the activated state is changed to the deactivated state, while the protection function in the deactivated state remains unchanged, thus achieving protection against maloperation.

[0203] In some embodiments, when the criterion type is the same bus voltage anti-misjudgment criterion, the target object is each bay connected to the same bus; the circuit breaker position, first disconnector position and second disconnector position of the equipment in each bay connected to the same bus are obtained according to the information configuration table;

[0204] When the switches in the circuit breaker position, the first disconnector position, and the second disconnector position are all in the closed state, it is determined that each bay connected to the same busbar is in the operating state.

[0205] After determining that each bay connected to the same busbar is in operation, the disconnector position of the voltage transformer of each bay connected to the same busbar is obtained according to the information configuration table.

[0206] When all switches in the disconnector position are closed, it is determined that the voltage transformer bays connected to each other on the same busbar are in operation.

[0207] Obtain the voltage data of each interval connected to the same busbar from the information configuration table;

[0208] A third criterion is constructed based on the voltage data of each interval connected to the same busbar; specifically including:

[0209] Abnormal sampling voltage of the protection device also poses a risk of protection malfunction. Since the voltage of each bay connected to the same busbar in the substation is taken from the same busbar voltage transformer PT (busbar merging unit), the amplitude and phase of the voltage of each bay are completely consistent under normal and fault conditions. If the voltage circuit is accidentally touched by a person (including secondary cables and voltage circuit breakers), it will cause a significant difference in voltage of a single bay while the voltage of other bays is normal. Based on this principle, the first voltage criterion is constructed. The voltage difference of all protection devices associated with each bay cascaded from the same busbar merging unit is calculated in sequence, as shown in formulas (8) to (10):

[0210] Formula (8);

[0211] Formula (9);

[0212] Formula (10);

[0213] in: The value ranges from 1 to N-1, where N is the number of bays connected to the same busbar. Indicates the first busbar of the same type A-phase protection voltage data for each interval Indicates the first busbar of the same type B-phase protection voltage data for each interval Indicates the first busbar of the same type C-phase protection voltage data for each interval, Indicates the first busbar of the same type +1 interval of A-phase protection voltage data, Indicates the first busbar of the same type +1 interval of B-phase protection voltage data, Indicates the first busbar of the same type +1 interval of C-phase protection voltage data, This represents the calculated difference in phase A voltage between two adjacent intervals. This represents the calculated difference in voltage between two adjacent B-phase intervals. This represents the calculated difference between the C-phase voltages of two adjacent intervals. Formula (8) is used to iteratively obtain the voltage difference between two adjacent intervals; F is the second set threshold, which should be set to avoid the error of the normal voltage sampling of the protection device. In this application, it can be set to 1.15V as needed. Indicates the first Each interval corresponds to the secondary rated voltage of the protection device.

[0214] A third criterion is constructed based on the first voltage criterion, and the third criterion is as follows:

[0215] ①If formulas (9) and (10) are true, then each interval connected under the same busbar is considered to be in normal condition;

[0216] ②If formula (9) is not true, then extract the first... The system retrieves information about the protection devices in each interval and determines that the interval is in a malfunctioning state.

[0217] ③If formula (9) is true and formula (10) is false, then each interval connected on the same busbar is determined to be in a fault state.

[0218] The third criterion is used to determine whether each interval connected to the same busbar is in a malfunction state, and the third criterion result is obtained.

[0219] If the third judgment result indicates that each bay connected to the same busbar is in a malfunction state, then the protection function in the dynamic control relay protection device that is in the activated state is changed to the deactivated state, while the protection function in the deactivated state remains unchanged, thus achieving protection against maloperation.

[0220] In some embodiments, when the criterion type is a cross-bus voltage comparison criterion, the target object is each bay connected to different buses via the same voltage transformer; the circuit breaker position, first disconnector position and second disconnector position of the equipment in each bay connected to different buses are obtained according to the information configuration table;

[0221] When the switches in the circuit breaker position, the first disconnector position, and the second disconnector position are all in the closed state, it is determined that each bay connected to different busbars is in the operating state.

[0222] After determining that each bay connected to different busbars is in operation, the voltage data of each bay connected to different busbars via the same voltage transformer is obtained from the information configuration table.

[0223] A fourth criterion is constructed based on the voltage data of each interval connected to the same voltage transformer on different busbars; specifically, it includes:

[0224] Because the rated secondary phase voltage of the busbar PTs at different voltage levels in the substation is all... V provides a basis for differential comparison of voltage values. Therefore, this invention proposes a method to improve the accuracy of analog quantities (voltages) forming anti-error logic by using remote measurements of voltages at each busbar in a substation to calculate the differences. Based on the position information of the PT isolating disconnectors, the A-phase, B-phase, C-phase, and L-phase voltages of all operating PTs are obtained through remote measurement, and a busbar voltage dataset is constructed and labeled as PT1, PT2, ..., PTN.

[0225] The voltages of each bus are successively calculated by difference, and the second voltage criterion is constructed accordingly, as shown in formulas (11) to (13):

[0226] Formula (11);

[0227] Formula (12);

[0228] Formula (13);

[0229] Where: m takes values ​​from 1 to M-1, and M is the number of running states PT. This represents the phase A voltage in the m-th interval. This represents the phase B voltage in the m-th interval. This represents the C-phase voltage of the m-th interval. This represents the L-phase voltage of the m-th interval. This represents the voltage of phase A in the (m+1)th interval. This represents the B-phase voltage of the (m+1)th interval. This represents the C-phase voltage of the (m+1)th interval. This represents the L-phase voltage of the (m+1)th interval. This represents the voltage difference between phase A of the m-th interval and the (m+1)-th interval. This represents the voltage difference between phase B of the m-th interval and the (m+1)-th interval. This represents the voltage difference between phase C of the m-th interval and the (m+1)-th interval. This represents the voltage difference between the L phases of the m-th interval and the (m+1)-th interval. Formula (11) is used to iteratively obtain the voltage difference between the two PTs in sequence; F is the second set threshold, which should be set to avoid the error of the normal voltage sampling of the protection device; G is the set threshold for the line voltage difference, which needs to take into account the voltage fluctuation range during normal operation of the line and the sensitivity requirements of the protection device to line voltage anomalies, so as to accurately distinguish between normal voltage changes and voltage anomalies caused by faults or misoperations.

[0230] A fourth criterion is constructed based on the second voltage criterion, and the fourth criterion is as follows:

[0231] ①If both formulas (12) and (13) are true, then all bays connected to the PT of the busbar are considered to be in normal condition;

[0232] ②If formula (12) is not true and formula (13) is true, then all bays connected to the PT of the busbar are determined to be in an erroneous state;

[0233] ③ If neither formula (12) nor formula (13) is valid, then all bays connected to the PT of the busbar are determined to be in a fault state.

[0234] The fourth criterion is used to determine whether each bay connected to the same voltage transformer on different busbars is in a malfunctioning state, and the fourth criterion result is obtained.

[0235] If the fourth judgment result indicates that all the bays connected to the same voltage transformer under different busbars are in a maloperation state, then the protection function in the dynamic control relay protection device that is in the activated state will be changed to the deactivated state, while the protection function in the deactivated state will remain unchanged, thus achieving protection against maloperation.

[0236] Based on the operating time limits of each protection segment of the protection device, the protection function is divided into two categories: instantaneous action protection and time-delay action protection. First, the representation of the protection device's function activation / deactivation status is defined as: 1 for activation; 0 for deactivation.

[0237] Define instantaneous operating protections such as current differential protection and distance protection stage I as Class A protections; define time-delayed operating protections such as zero-sequence current protection and overcurrent protection as Class B protections. Set the initial functional state of both Class A and Class B protections to 1.

[0238] The present invention also provides a control relationship between the communication status and protection function of a data acquisition and processing device.

[0239] When the data acquisition and processing device communicates with the station control layer protection, if the heartbeat message based on the TCP / IP communication protocol is transmitted normally, the functional status of Class A protection is set to 0, thereby realizing normal blocking of protection for instantaneous actions.

[0240] When communication between the data acquisition and processing device and the station control layer protection is abnormal; if the heartbeat message based on the TCP / IP communication protocol is interrupted, the data acquisition and processing device cannot achieve the anti-maloperation control of the entire station protection. The function status of Class A protection will be set to 1 immediately, the action enable of the protection device will be turned on, and a "communication interruption" alarm signal will be issued immediately. When communication is restored to normal, the function status of Class A protection will be set to 0.

[0241] In some embodiments, according to the relay protection principle, erroneous operations such as accidental contact with the AC secondary circuit and incorrect wiring of the AC secondary circuit are all caused by human operation and cannot be fundamentally avoided by software programs; however, the parameter settings of the protection device can fundamentally avoid the occurrence of erroneous settings through anti-misoperation strategies. This patent divides the soft-plate parameters of the protection device into three categories: GOOSE output soft-plate, protection function soft-plate, and subscription sampling value SV receiving soft-plate.

[0242] Based on experience in relay protection operation and maintenance, it is known that erroneous disengagement of the soft pressure plate of the protection device in operating equipment will cause false tripping. However, erroneous or missed activation of the soft pressure plate of the protection device in a non-operating bay will cause false tripping of the protection after the bay is energized. Therefore, this invention proposes a soft pressure plate erroneous prevention strategy for all states of primary equipment.

[0243] Protective device soft pressure plate anti-misoperation strategy.

[0244] The relay protection device's soft pressure plate includes a GOOSE output soft pressure plate, a protection function soft pressure plate, and a subscription sampled value (SV) receiving soft pressure plate. The method further includes:

[0245] When all soft pressure plates of the relay protection device are in the active state, it is permissible to deactivate the GOOSE output soft pressure plate. After confirming that all GOOSE output soft pressure plates have been deactivated, it is permissible to deactivate the protection function soft pressure plate. After confirming that all protection function soft pressure plates have been deactivated, it is permissible to deactivate the subscription sample value SV receiving soft pressure plate. After confirming that all subscription sample value SV receiving soft pressure plates have been deactivated, the deactivation operation of the relay protection device's soft pressure plates is completed.

[0246] When all the soft switch plates of the relay protection device are in the deactivated state, the soft switch plate for subscribing to sampled values ​​(SV) is allowed to be activated. After confirming that all the soft switch plates for subscribing to sampled values ​​(SV) are activated, the soft switch plates for protection functions are allowed to be activated. After confirming that all the soft switch plates for protection functions are activated, the soft switch plates for GOOSE output are allowed to be activated. After confirming that all the soft switch plates for GOOSE output are activated, the activation operation of the soft switch plates of the relay protection device is completed. The specific operation is as follows:

[0247] In this invention, a method for preventing malfunctions of shared soft control panels is provided for devices in operation, standby / trip, maintenance, and operation states. For the j-th relay protection device, three types of soft control panels are defined with logic enable switches for enabling and disabling operations. A value of "1" indicates that operation is allowed, and a value of "0" indicates that operation is blocked. Further explanation: if 2_OUT_enabled(j) = 1, changes to the protection function soft control panel are allowed; if 1_IN_enabled(j) = 0, changes to the soft control panel receiving the subscribed sample value SV are blocked.

[0248] Table 5: Schematic Diagram of Error Prevention Logic for Soft Pressure Plate Operation

[0249]

[0250] Define the GOOSE outlet soft pressure plate as x1, x2, x3, ..., x h The protective soft pressure plates are represented as y1, y2, y3, ..., y h The subscribed sampled values ​​SV are represented by the soft pressure plate as z1, z2, z3, ..., z h Where x h y h , z h To protect the number of soft pressure plates required by the setting sheet, define the input state as "1" and the output state as "0".

[0251] The program monitors the three types of soft pressure plate states of protection device j in real time, and uses the soft pressure plate state criteria to control the logic enable switch of the soft pressure plate operation, thereby implementing the protection soft pressure plate error prevention algorithm. The specific implementation steps are as follows:

[0252] The protection device soft pressure plate exits the logic.

[0253] If all soft pressure plates are in the engaged state:

[0254] Set 1_OUT_enabled(j) = 1 (that is, enable the GOOSE outlet soft plate to be 0);

[0255] If satisfied Set 1_OUT_enabled(j)=0 and 2_OUT_enabled(j)=1 (that is, set the soft pressure plate of the protection function to 0).

[0256] If satisfied Set 2_OUT_enabled(j)=0 and 3_OUT_enabled(j)=1 (that is, set the soft plate to 0 to allow subscription of sampled value SV reception).

[0257] If satisfied Setting 3_OUT_enabled(j)=0, the device indicates that the protection j soft pressure plate has successfully exited.

[0258] The protection device soft pressure plate is put into operation logic.

[0259] If all soft pressure plates are in the off state:

[0260] Set 1_IN_enabled(j) = 1 (that is, enable the soft switch to receive the sampled value SV).

[0261] If satisfied Set 1_IN_enabled(j)=0 and 2_IN_enabled(j)=1 (that is, set the soft pressure plate to 1 to enable protection function).

[0262] If satisfied Set 2_IN_enabled(j)=0 and 3_IN_enabled(j)=1 (that is, set the GOOSE outlet soft pressure plate to 1).

[0263] If satisfied Setting 3_IN_enabled(j)=0, the device indicates that the protection j soft pressure plate has been successfully engaged.

[0264] When changing the soft pressure plate status fails, the device will indicate that the soft pressure plate status criteria are not met and the operator should check again.

[0265] In summary, only when the soft pressure plate status criterion is met can the protection soft pressure plate be correctly engaged / disengaged. This strategy fundamentally avoids the occurrence of missetting.

[0266] This invention provides a logic diagram for preventing errors in the engagement and disengagement sequence of a protective device's soft pressure plate, as shown below. Figure 5 As shown.

[0267] After the initial state setting process is started, the enable states of multiple outputs (1_OUT_enaEnable, 1_OUT_enabled, 1_OUT_enabled) and inputs (1_IN_enabled, 1_IN_enabled, 1_IN_enabled) are initialized and set to 0. It then checks if the soft pressure plate states are all "1". If they are, 1_OUT_enabled is set to 1, and then... If true, set 1_OUT_enabled(j) = 0 and 2_OUT_enabled(j) = 1; otherwise, return and check again, then continue checking. If true, set 2_OUT_enabled(j) = 0 and 3_OUT_enabled(j) = 1; otherwise, return and check again, then continue checking. If the condition is true, set 3_IN_enabled(j)=0; otherwise, return and check again. After 3_IN_enabled(j)=0, the protection (j) pressure plate exits and the process ends.

[0268] If the soft pressure plate status is not "1", then check if the soft pressure plate status is "0". If it is, then 1_IN_enabled = 1, and then check... If true, set 1_IN_enabled(j) = 0 and 2_IN_enabled(j) = 1; otherwise, return and check again, then continue checking. If true, set 2_IN_enabled(j) = 0 and 3_IN_enabled(j) = 1; otherwise, return and check again, then continue checking. If the condition is true, set 3_IN_enabled(j)=0; otherwise, return and check again. After 3_IN_enabled(j)=0, the protection (j) pressure plate exits and the process ends.

[0269] If the soft pressure plate status is not "0", then the judgment condition is not met, and the process returns to judging whether the soft pressure plate status is "1".

[0270] In some embodiments, when the switch at the circuit breaker position is in the open state, the switch at the first disconnector position is in the closed state, and the switch at the second disconnector position is in the closed state, the first interval is determined to be in standby or tripped state.

[0271] When the switch at the circuit breaker position is in the open state, the switch at the first disconnector position is in the open state, and the switch at the second disconnector position is in the closed state, the first interval is determined to be in the operating state.

[0272] After determining that the first bay is in standby, tripped, or operational state, it is confirmed again whether the switch at the second disconnector position is closed. If it is confirmed that the switch at the second disconnector position is closed, the bus protection is activated to receive the subscription sample value SV of the first bay via the soft pressure plate.

[0273] If the switches in the first disconnector position and the second disconnector position are in the open state, but the switch in the circuit breaker position is in the closed or open state, the first interval is determined to be in the maintenance state.

[0274] After determining that the first bay is under maintenance, it is confirmed again whether the switch at the second disconnector position is in the open state. If it is confirmed that the switch at the second disconnector position is in the open state, the bus protection automatically exits the subscription sampling value SV receiving soft pressure plate of the first bay.

[0275] Based on the above, the following steps are taken: First, the target feature information and the virtual terminal mapping relationship between process layer devices are obtained. Second, an information configuration table is set up based on the target feature information and the virtual terminal mapping relationship between process layer devices, using process layer intervals as units. Third, the circuit breaker position, first disconnector position, and second disconnector position of the devices in the first interval are obtained according to the information configuration table. Fourth, if the switches at the circuit breaker position, first disconnector position, and second disconnector position are all in a closed state, the first interval is determined to be in an operating state. Fifth, after determining that the first interval is in an operating state, the current data of the first interval is obtained from the information configuration table. Sixth, a first criterion is constructed based on the current data of the first interval. Seventh, the first criterion is used to determine whether the first interval is in a malfunction state, and a first judgment result is obtained. Sixth, if the first judgment result indicates that the first interval is in a malfunction state, the protection function in the relay protection device that is in the activated state is set to the deactivated state, while the protection function in the deactivated state remains unchanged, thus achieving protection against maloperation. This invention obtains target feature information and virtual terminal mapping relationship, sets information configuration table in process layer intervals, judges interval operation status by comprehensively considering the positions of circuit breakers and disconnectors, and then constructs criteria based on current data to judge maloperation state and dynamically controls the function of relay protection device, realizing multi-dimensional and dynamic protection against maloperation, effectively improving the accuracy and reliability of maloperation prevention.

[0276] The above text combined Figures 1 to 2 The method for preventing maloperation of the relay protection device provided in the embodiments of the present invention has been described in detail. The device and equipment provided in the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0277] This invention also provides a device to prevent maloperation of a relay protection device, such as... Figure 6 As shown in the figure, this is a schematic diagram of an anti-maloperation device for a relay protection device provided in an embodiment of the present invention. The device includes:

[0278] The setting module 601 is used to acquire target feature information and virtual terminal mapping relationship between process layer devices, set an information configuration table according to the target feature information and virtual terminal mapping relationship between process layer devices; and determine the target object and corresponding criterion type to be judged according to the information configuration table and the preset anti-maloperation scenario judgment logic; when the criterion type is single-interval current anti-maloperation criterion, the target object is the first interval.

[0279] The judgment module 602 is used to obtain the circuit breaker position, first disconnector position, and second disconnector position of the equipment in the first bay according to the information configuration table; when the switches at the circuit breaker position, the first disconnector position, and the second disconnector position are all in the closed state, the first bay is determined to be in the operating state; after determining that the first bay is in the operating state, the current data of the first bay is obtained from the information configuration table; a first criterion is constructed based on the current data of the first bay; and the first criterion is used to determine whether the first bay is in a malfunction state, and a first judgment result is obtained.

[0280] The protection module 603 is used to dynamically control the protection function in the relay protection device that is in the activated state to the deactivated state if the first judgment result indicates that the first interval is in the malfunction state, while the protection function in the deactivated state remains unchanged, thereby achieving protection against maloperation.

[0281] In some possible implementations, the device further includes:

[0282] The first judgment module is used to determine whether the first bay is in standby or tripped state when the switch at the circuit breaker position is open, the switch at the first disconnector position is closed, and the switch at the second disconnector position is closed; when the switch at the circuit breaker position is open, the switch at the first disconnector position is open, and the switch at the second disconnector position is closed, the first bay is in operation state; after determining whether the first bay is in standby, tripped, or operation state, it reconfirms whether the switch at the second disconnector position is closed. If it is confirmed that the switch at the second disconnector position is closed, the bus protection activates the subscription sampling value SV receiving soft switch of the first bay; when the switches at the first disconnector position and the second disconnector position are open, but the switch at the circuit breaker position is closed or open, the first bay is determined to be in maintenance state; after determining that the first bay is in maintenance state, it reconfirms whether the switch at the second disconnector position is open. If it is confirmed that the switch at the second disconnector position is open, the bus protection automatically deactivates the subscription sampling value SV receiving soft switch of the first bay.

[0283] In some possible implementations, the current data of the first interval includes the current protection setting value of the relay protection device associated with the first interval, the three-phase protection current of the first interval, the three-phase measurement current of the first interval, and the rated current of the current transformer of the first interval; the judgment module 602 is specifically used to obtain the current difference of the first interval based on the three-phase protection current and the three-phase measurement current of the first interval, and to obtain a first sub-criteria based on the current difference of the first interval; to obtain a second sub-criteria based on the three-phase protection current and the rated current of the current transformer of the first interval; to obtain a third sub-criteria based on the current protection setting value of the relay protection device associated with the first interval and the three-phase protection current of the first interval; and to construct a first criterion based on the first sub-criteria, the second sub-criteria, and the third sub-criteria.

[0284] In some possible implementations, the device further includes:

[0285] The second judgment module is used when the judgment type is a multi-bay differential anti-misoperation judgment, and the target objects are the second bay and the third bay; it obtains the circuit breaker position, first disconnector position and second disconnector position of the equipment in the second bay according to the information configuration table, and obtains the circuit breaker position, first disconnector position and second disconnector position of the equipment in the third bay; if the switches at the circuit breaker position, first disconnector position and second disconnector position of the equipment in the second bay are all in the closed state, and the switches at the circuit breaker position, first disconnector position and second disconnector position of the equipment in the third bay are all in the closed state, it determines that the second bay and the third bay are... The second and third intervals are both in operation. After determining that the second and third intervals are both in operation, the current data of the second and third intervals are obtained from the information configuration table. A second criterion is constructed based on the current data of the second and third intervals. The second criterion is used to determine whether the second and third intervals are in a malfunction state, and a second judgment result is obtained. If the second judgment result indicates that the second and third intervals are in a malfunction state, the protection function in the dynamic control relay protection device that is in the activated state is set to the deactivated state, while the protection function in the deactivated state remains unchanged, thereby achieving protection against maloperation.

[0286] In some possible implementations, the device further includes:

[0287] The third judgment module is used when the judgment criterion type is the same bus voltage anti-misoperation judgment criterion, and the target object is each bay connected to the same bus; it obtains the circuit breaker position, first disconnector position, and second disconnector position of the equipment in each bay connected to the same bus according to the information configuration table; if the switches at the circuit breaker position, first disconnector position, and second disconnector position are all in the closed state, it determines that each bay connected to the same bus is in the operating state; after determining that each bay connected to the same bus is in the operating state, it obtains the disconnector position of the voltage transformer in each bay connected to the same bus according to the information configuration table; if the switches at the disconnector positions are all in the closed state... In this case, it is determined that the voltage transformer bays connected to each other on the same busbar are in operation; the voltage data of each bay connected to each other on the same busbar is obtained from the information configuration table; a third criterion is constructed based on the voltage data of each bay connected to each other on the same busbar; the third criterion is used to determine whether each bay connected to each other on the same busbar is in a malfunction state, and a third judgment result is obtained; if the third judgment result indicates that each bay connected to each other on the same busbar is in a malfunction state, the protection function in the dynamic control relay protection device that is in the activated state is set to the deactivated state, while the protection function in the deactivated state remains unchanged, thereby achieving protection against maloperation.

[0288] In some possible implementations, the device further includes:

[0289] The fourth judgment module is used when the judgment criterion type is cross-bus voltage comparison criterion, and the target object is each bay connected to different buses via the same voltage transformer; it obtains the circuit breaker position, first disconnector position, and second disconnector position of the equipment in each bay connected to different buses according to the information configuration table; if the switches in the circuit breaker position, first disconnector position, and second disconnector position are all in the closed state, it determines that each bay connected to different buses is in the operating state; after determining that each bay connected to different buses is in the operating state, it obtains the cross-bus voltage comparison criterion from the information configuration table. The voltage data of each bay connected by the current transformer is collected; a fourth criterion is constructed based on the voltage data of each bay connected by the same voltage transformer on different busbars; the fourth criterion is used to determine whether each bay connected by the same voltage transformer on different busbars is in a malfunction state, and a fourth judgment result is obtained; if the fourth judgment result indicates that each bay connected by the same voltage transformer on different busbars is in a malfunction state, then the protection function in the dynamically controlled relay protection device that is in the activated state is set to the deactivated state, while the protection function in the deactivated state remains unchanged, thereby achieving protection against maloperation.

[0290] In some possible implementations, the device further includes:

[0291] The protection module is used to allow the GOOSE output soft pressure plate to be deactivated when all soft pressure plates of the relay protection device are in the activated state; after confirming that all GOOSE output soft pressure plates have been deactivated, it allows the protection function soft pressure plate to be deactivated; after confirming that all protection function soft pressure plates have been deactivated, it allows the subscription sampling value SV receiving soft pressure plate to be deactivated; and after confirming that all subscription sampling value SV receiving soft pressure plates have been deactivated, the soft pressure plate deactivation operation of the relay protection device is realized.

[0292] When all the soft pressure plates of the relay protection device are in the off state, the subscription sampling value SV receiving soft pressure plate is allowed to be put into operation. After confirming that all the subscription sampling value SV receiving soft pressure plates are put into operation, the protection function soft pressure plate is allowed to be put into operation. After confirming that all the protection function soft pressure plates are put into operation, the GOOSE output soft pressure plate is allowed to be put into operation. After confirming that all the GOOSE output soft pressure plates are put into operation, the soft pressure plate operation of the relay protection device is realized.

[0293] The anti-maloperation device of the relay protection device according to the embodiments of the present invention can correspond to the execution of the method described in the embodiments of the present invention, and the other operations and / or functions of each module / unit of the anti-maloperation device of the relay protection device are respectively for implementing Figure 1 For the sake of brevity, the corresponding processes of each method in the illustrated embodiments will not be described in detail here.

[0294] This invention also provides a computing device. For example... Figure 7 As shown in the figure, this is a schematic diagram of a computing device provided in an embodiment of the present invention. The computing device 400 includes a bus 401, a processor 402, a communication interface 403, and a memory 404. The processor 402, the memory 404, and the communication interface 403 communicate with each other via the bus 401.

[0295] Bus 401 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 7 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0296] Processor 402 can be any one or more of the following processors: central processing unit (CPU), graphics processing unit (GPU), microprocessor (MP), or digital signal processor (DSP).

[0297] The communication interface 403 is used for communication with external devices. For example, if the computing device is a first switch, the communication interface 403 can be used for communication between the first switch and a first user terminal, or for communication between the first switch and a second switch.

[0298] Memory 404 may include volatile memory, such as random access memory (RAM). Memory 404 may also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid state drive (SSD).

[0299] The memory 404 stores executable code, and the processor 402 executes the executable code to perform the aforementioned method for preventing maloperation of the relay protection device.

[0300] Specifically, in achieving Figure 6 In the case of the illustrated embodiment, and Figure 6 When the modules or units of the anti-maloperation device of the relay protection device described in the embodiment are implemented by software, the execution... Figure 6 The software or program code required for the functions of each module / unit can be partially or entirely stored in the memory 404. The processor 402 executes the program code corresponding to each unit stored in the memory 404 to execute the aforementioned method for preventing maloperation of the relay protection device.

[0301] This invention also provides a computer-readable storage medium. The computer-readable storage medium can be any available medium that a computing device can store, or a data storage device such as a data center containing one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive). The computer-readable storage medium includes instructions that instruct the computing device to execute the aforementioned method for preventing malfunction of the relay protection device.

[0302] This invention also provides a computer program product comprising one or more computer instructions. When the computer instructions are loaded and executed on a computing device, all or part of the processes or functions described in this invention are generated.

[0303] The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, or data center to another website, computer, or data center via wired (e.g., coaxial cable, fiber optic) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0304] When the computer program product is executed by a computer, the computer executes any of the aforementioned methods for preventing maloperation of the relay protection device. The computer program product can be a software installation package; when any of the aforementioned methods for preventing maloperation of the relay protection device needs to be used, the computer program product can be downloaded and executed on the computer.

[0305] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0306] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for preventing a false operation of a relay protection device, characterized by, The method comprises: obtaining target feature information and a virtual terminal mapping relationship between process layer devices, and setting an information configuration table according to the target feature information and the virtual terminal mapping relationship between process layer devices; determining a target object and a corresponding criterion type that need to perform anti-malfunction judgment according to the information configuration table and preset anti-malfunction scene judgment logic; when the criterion type is a single-interval current anti-malfunction criterion, the target object is a first interval; obtaining a circuit breaker position, a first switch position and a second switch position of a device in the first interval according to the information configuration table; when the switches at the circuit breaker position, the first switch position and the second switch position are all in a closed state, it is determined that the first interval is in a running state; after it is determined that the first interval is in the running state, obtaining current data of the first interval from the information configuration table; constructing a first criterion according to the current data of the first interval; judging whether the first interval is in a misoperation state according to the first criterion to obtain a first judgment result; if the first judgment result indicates that the first interval is in the misoperation state, dynamically controlling a protection function in a relay protection device that is in an input state to be changed from the input state to an exit state, and keeping a protection function in the relay protection device that is in the exit state unchanged, so as to realize protection anti-malfunction; the current data of the first interval comprises a current protection setting value of a relay protection device associated with the first interval, three-phase protection currents of the first interval, three-phase measurement currents of the first interval and a rated current of a current transformer of the first interval; and the constructing of the first criterion according to the current data of the first interval comprises: obtaining a current difference value of the first interval according to the three-phase protection currents and the three-phase measurement currents of the first interval, and obtaining a first sub-criterion according to the current difference value of the first interval; obtaining a second sub-criterion according to the three-phase protection currents of the first interval and the rated current of the current transformer of the first interval; obtaining a third sub-criterion according to the current protection setting value of the relay protection device associated with the first interval and the three-phase protection currents of the first interval; constructing the first criterion according to the first sub-criterion, the second sub-criterion and the third sub-criterion.

2. The method of claim 1, wherein, The method further comprises: when the switch at the circuit breaker position is in an open state, the switch at the first switch position is in a closed state and the switch at the second switch position is in a closed state, it is determined that the first interval is in a standby or tripping state; when the switch at the circuit breaker position is in an open state, the switch at the first switch position is in an open state and the switch at the second switch position is in a closed state, it is determined that the first interval is in an operation state; after it is determined that the first interval is in the standby or tripping or operation state, it is further determined whether the switch at the second switch position is in a closed state; if it is determined that the switch at the second switch position is in the closed state, a bus protection inputs a subscription sampling value SV of the first interval to receive a soft pressure plate; when the switches at the first switch position and the second switch position are in open states, but the switch at the circuit breaker position is in a closed state or an open state, it is determined that the first interval is in a maintenance state; After determining that the first interval is in the maintenance state, it is further determined whether the switch of the second switch position is in the open state, and if the switch of the second switch position is in the open state, the bus protection automatically exits the subscription sampling value SV receiving soft pressure plate of the first interval.

3. The method of claim 1, wherein, The method further comprises: When the criterion type is a multi-interval differential anti-misoperation criterion, the target object is the second interval and the third interval; According to the information configuration table, the breaker position, the first switch position and the second switch position of the equipment in the second interval are obtained, and the breaker position, the first switch position and the second switch position of the equipment in the third interval are obtained; In the case that the switches of the breaker position, the first switch position and the second switch position of the equipment in the second interval are all in the closed state and the switches of the breaker position, the first switch position and the second switch position of the equipment in the third interval are all in the closed state, it is determined that the second interval and the third interval are both in the running state; After determining that the second interval and the third interval are both in the running state, the current data of the second interval and the third interval are obtained from the information configuration table; The second criterion is constructed according to the current data of the second interval and the third interval; According to the second criterion, it is determined whether the second interval and the third interval are in the misoperation state, and a second determination result is obtained; If the second determination result represents that the second interval and the third interval are in the misoperation state, the protection function in the relay protection device in the input state is set from the input state to the exit state, and the protection function in the relay protection device in the exit state remains unchanged, so that the protection anti-malfunction is realized.

4. The method of claim 1, wherein, The method further comprises: When the criterion type is a same-source bus voltage anti-misoperation criterion, the target object is each interval connected under the same bus; According to the information configuration table, the breaker position, the first switch and the second switch position of the equipment in each interval connected under the same bus are obtained; In the case that the switches of the breaker position, the first switch position and the second switch position are all in the closed state, it is determined that each interval connected under the same bus is in the running state; After determining that each interval connected under the same bus is in the running state, the switch position of the voltage transformer of each interval connected under the same bus is obtained according to the information configuration table; In the case that the switches of the switch position are all in the closed state, it is determined that the voltage transformer interval of each interval connected under the same bus is in the running state; The voltage data of each interval connected under the same bus are obtained from the information configuration table; The third criterion is constructed according to the voltage data of each interval connected under the same bus; According to the third criterion, it is determined whether each interval connected under the same bus is in the misoperation state, and a third determination result is obtained; If the third determination result represents that each interval connected under the same bus is in the misoperation state, the protection function in the relay protection device in the input state is set from the input state to the exit state, and the protection function in the relay protection device in the exit state remains unchanged, so that the protection anti-malfunction is realized.

5. The method of claim 1, wherein, The method further comprises: When the criterion type is the cross-bus voltage ratio criterion, the target object is each interval connected under different buses through the same voltage transformer; According to the information configuration table, the breaker position, the first switch position and the second switch position of the equipment in each interval connected under different buses are obtained; In the case that the switches of the breaker position, the first switch position and the second switch position are all in the closed state, it is determined that each interval connected under different buses is in the running state; After it is determined that each interval connected under different buses is in the running state, the voltage data of the intervals connected under different buses through the same voltage transformer are obtained from the information configuration table; The fourth criterion is constructed according to the voltage data of the intervals connected under different buses through the same voltage transformer; According to the fourth criterion, it is determined whether each interval connected under different buses through the same voltage transformer is in the misoperation state, and a fourth determination result is obtained; If the fourth determination result represents that each interval connected under different buses through the same voltage transformer is in the misoperation state, the protection function in the relay protection device in the input state is set from the input state to the exit state, and the protection function in the relay protection device in the exit state remains unchanged, so that the protection misoperation prevention is realized.

6. The method of claim 1, wherein, The soft press plate of the relay protection device includes a GOOSE outlet soft press plate, a protection function soft press plate and a subscription sampling value SV receiving soft press plate, and the method further includes: When the soft press plates of the relay protection device are all in the input state, the GOOSE outlet soft press plate is allowed to exit, the protection function soft press plate is allowed to exit after confirming that the GOOSE outlet soft press plate has exited completely, the subscription sampling value SV receiving soft press plate is allowed to exit after confirming that the protection function soft press plate has exited completely, and the exit operation of the soft press plates of the relay protection device is realized after confirming that the subscription sampling value SV receiving soft press plate has exited completely; When the soft press plates of the relay protection device are all in the exit state, the subscription sampling value SV receiving soft press plate is allowed to be input, the protection function soft press plate is allowed to be input after confirming that the subscription sampling value SV receiving soft press plate has been input completely, the GOOSE outlet soft press plate is allowed to be input after confirming that the protection function soft press plate has been input completely, and the input operation of the soft press plates of the relay protection device is realized after confirming that the GOOSE outlet soft press plate has been input completely.

7. A misoperation prevention device of a relay protection device, characterized by comprising: The device includes: The setting module is configured to set an information configuration table according to target feature information and a virtual terminal mapping relationship between process layer equipment, determine a target object and a corresponding criterion type that need to perform misoperation prevention judgment according to the information configuration table and a preset misoperation prevention scene judgment logic, and when the criterion type is a single interval current misoperation prevention criterion, the target object is a first interval. The judgment module is configured to obtain a circuit breaker position, a first switch position, and a second switch position of the device in the first interval according to the information configuration table; determine that the first interval is in a running state when switches of the circuit breaker position, the first switch position, and the second switch position are all in a closed state; obtain current data of the first interval from the information configuration table after determining that the first interval is in the running state; construct a first criterion according to the current data of the first interval; determine whether the first interval is in a misoperation state according to the first criterion to obtain a first judgment result; the current data of the first interval includes a current protection setting value of a relay protection device associated with the first interval, three-phase protection currents of the first interval, three-phase measurement currents of the first interval, and a rated current of a current transformer of the first interval; the constructing of the first criterion according to the current data of the first interval includes: obtaining a current difference value of the first interval according to the three-phase protection currents and the three-phase measurement currents of the first interval, and obtaining a first sub-criterion according to the current difference value of the first interval; obtaining a second sub-criterion according to the three-phase protection currents of the first interval and the rated current of the current transformer; obtaining a third sub-criterion according to the current protection setting value of the relay protection device associated with the first interval and the three-phase protection currents of the first interval; and constructing the first criterion according to the first sub-criterion, the second sub-criterion, and the third sub-criterion; The protection module is configured to dynamically control a protection function in a relay protection device that is in an input state to be changed from the input state to an exit state if the first judgment result indicates that the first interval is in the misoperation state, and keep a protection function in the relay protection device that is in the exit state unchanged, so as to realize protection misoperation prevention.

8. A computing device, comprising: comprises a memory and a processor; The memory stores one or more computer programs comprising instructions, and when the instructions are executed by the processor, the computing device performs the method of any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium is used to store a computer program for executing the method of any one of claims 1 to 6.

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