Substation domain emergency protection system

Abstract

The invention relates to the technical field of power systems, in particular to a substation area emergency protection system. The protection unit is used for monitoring the operation state of the primary equipment of the transformer substation; the pressing plate unit is used for monitoring device functions and outlet pressing plate states; the station domain emergency protection unit receives the equipment fault signal and the pressing plate fault signal, analyzes the fault signals by using a multi-signal combination matrix analysis and dynamic logic decision algorithm, and generates a control signal; the scheduling unit receives the control signal through an EMS system, displays the equipment state in real time and generates an alarm signal and a control instruction; and the equipment switch unit is used for executing corresponding protection operation according to the risk alarm and the control signal. According to the substation domain emergency protection system, dynamic decision and signal matrix analysis are introduced, faults are analyzed through multi-signal combination matrix analysis and a dynamic logic decision algorithm, and rapid and accurate emergency protection of a substation is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a substation area emergency protection system. Background Art

[0002] The substation emergency protection system is designed to quickly remove the fault area and improve the overall protection response speed of the system. Through multi-signal combination matrix analysis and dynamic logic decision-making algorithm, it controls the protection unit and pressure plate unit to achieve real-time analysis and rapid processing of various fault signals, ensure system stability and reduce the scope of accidents.

[0003] The existing substation area emergency protection system is usually difficult to meet the rapid protection requirements of ultra-high voltage AC / DC hybrid power grids. In addition, since the protection device may be locked or the board may not be put into operation, if the above problems occur at the same time, the system will not be able to quickly judge and quickly remove the fault when it occurs, which will cause system stability problems or cause large-scale power outages. Therefore, a substation area emergency protection system is designed. Summary of the invention

[0004] The purpose of the present invention is to provide a substation emergency protection system to solve the problems mentioned in the above background technology. The protection device may be locked or the board may not be put into operation. If the above problems occur at the same time, the system will not be able to make quick judgments and quick cutoffs when a fault occurs, thereby causing system stability problems or causing large-scale power outages.

[0005] To achieve the above object, the present invention provides a substation area emergency protection system, comprising: A protection unit, which is used to monitor the operating status of the primary equipment of the substation and transmit the equipment fault signal to the station emergency protection unit through the signal interface; It also includes a pressure plate unit, which is used to monitor the function of the device and the state of the outlet pressure plate, and transmit the pressure plate fault signal to the station area emergency protection unit through the signal interface; It also includes a station area emergency protection unit, which receives equipment fault signals and pressure plate fault signals, uses multi-signal combination matrix analysis and dynamic logic decision algorithm to analyze the fault signals, calculates the combined risk scores of different signals and obtains three levels of risk alarms, generates a control signal and sends it to the dispatching unit; It also includes a dispatching unit, which uses the EMS system to receive control signals, analyze and record control signals, display equipment status in real time, and generate alarm signals and control instructions to control equipment switch units; It also includes a device switch unit, which is used to perform corresponding protection operations according to risk warnings and control signals of different levels.

[0006] The protection unit includes a protection module 1 and a protection module 2; Wherein, the equipment fault signal includes fault abnormality lockout signal, device DC power loss and operation power loss signal; The protection module is used to monitor the protection device and to lock the fault abnormality signal of the protection device. 、The DC power supply of the device disappears and operating power failure signal Transmitted to the station area emergency protection unit through the signal interface; The protection module 2 is used to monitor the protection device 2 and to lock the fault abnormality signal of the protection device 2. 、The DC power supply of the device disappears and operating power failure signal Transmitted to the station area emergency protection unit through the signal interface.

[0007] As a further improvement of the technical solution, the pressing plate unit includes a pressing plate 1 module and a pressing plate 2 module; Among them, the pressure plate fault signal includes the function pressure plate not put into use signal and the outlet pressure plate not put into use signal; The pressure plate module is used to monitor the function pressure plate and the exit pressure plate status of the protection device, and to signal the function pressure plate of the protection device not to be put into operation. And the exit pressure plate is not put into signal Transmitted to the station area emergency protection unit through the signal interface; The pressure plate module is used to monitor the function pressure plate and the exit pressure plate status of the protection device 2, and to signal the function pressure plate of the protection device 2 not to be put into operation. And the exit pressure plate is not put into signal Transmitted to the station area emergency protection unit through the signal interface.

[0008] As a further improvement of the present technical solution, the multi-signal combination matrix analysis and dynamic logic decision algorithm is an intelligent protection algorithm implemented based on signal matrix calculation and multi-level logic judgment mechanism, which is used to comprehensively analyze multiple types of signals from the protection unit and the pressure plate unit, calculate the combined risk score, and implement three-level risk judgment and control output based on the score value. The specific logic is as follows: Signal matrix calculation: integrates all signal inputs into a protection signal matrix and platen signal matrix , and generate the combined signal matrix through matrix operations Calculate the comprehensive risk score; Multi-level logical judgment mechanism: A three-level logical judgment mechanism is set up to divide risks into three levels of risk warnings: low, medium, and high, by combining the scoring values ​​of the signal matrix, and generate corresponding control signals for each level.

[0009] As a further improvement of the technical solution, the station area emergency protection unit includes a signal receiving module, a signal analysis module and a logic decision control module; Wherein, the signal receiving module is used to receive equipment fault signals and pressure plate fault signals from the protection unit and the pressure plate unit; The signal analysis module is used to construct the equipment fault signal and the pressure plate fault signal into a protection signal matrix and platen signal matrix , and combined into a combined signal matrix , calculate the comprehensive risk score ; The logic decision control module is used to generate three-level risk warnings and corresponding control signals according to the comprehensive risk score judgment, and send them to the scheduling unit.

[0010] As a further improvement of the technical solution, the signal analysis module is used to construct the equipment fault signal and the pressure plate fault signal into a protection signal matrix and platen signal matrix , and combined into a combined signal matrix , calculate the comprehensive risk score , the specific method is as follows: S3.1.1. Constructing the protection signal matrix and platen signal matrix : ; ; S3.1.2, Extended Platen Signal Matrix Dimensions, and combined into a combined signal matrix according to the "AND" operation : ; ; in, To convert the platen signal matrix Expanded to a 2×3 dimensional pressure plate signal matrix; S3.1.3. Calculate the combined signal matrix using the Frobenius norm Comprehensive risk score : ; in, is the combined signal matrix The line number of is the combined signal matrix The column number.

[0011] As a further improvement of the technical solution, the logic decision control module is used to generate a three-level risk warning and a corresponding control signal according to the comprehensive risk score judgment, and send it to the scheduling unit. The specific method is as follows: S3.2.1. Setting risk thresholds and Based on the comprehensive risk score Determine the risk level alarm: Low risk warning: ; Medium risk warning: ; High risk warning: ; S3.2.2. According to the combined signal matrix Generate corresponding control signals and send them to the scheduling unit.

[0012] As a further improvement of the technical solution, in S3.2.2, according to the combined signal matrix Generate the corresponding control signal and send it to the scheduling unit. The specific logic is as follows: like , protection one protection lost, generate control signal and sent to the dispatching unit; like , protection 2 protection lost, generate control signal and sent to the dispatching unit; like After a short delay, the corresponding devices of protection 1 and protection 2 are tripped, generating a control signal and sent to the dispatching unit; like , protection one is lost due to function / export pressure plate not being put into use, generating control signal and sent to the dispatching unit; like , protection 2 is lost due to function / export pressure plate not being put into use, generating control signal and sent to the dispatching unit; like After a long delay, the corresponding devices of protection 1 and protection 2 are tripped and a control signal is generated. And sent to the scheduling unit.

[0013] As a further improvement of the technical solution, the dispatching unit is used to receive the control signal through the EMS system, analyze and store the control signal type and generate an alarm signal and a control instruction to control the device switch unit. The specific method is as follows: S4.1. Analyze storage control signals , generate a protection loss alarm signal and display it on the screen in real time; S4.2. Analyze storage control signals , generate protection 2 loss of protection alarm signal, and display it on the screen in real time; S4.3. Analyze storage control signals , generate short-delay trip protection 1 and protection 2 device control instructions , displayed on the screen in real time and sent to the device switch unit; S4.4. Analysis of storage control signals , generate an alarm signal of protection loss due to failure of the pressure plate to be put into use, and display it on the screen in real time; S4.5. Analyze and store control signals , generate an alarm signal that the protection 2 is lost due to the failure of the pressure plate to be put into use, and display it on the screen in real time; S4.6. Analyze and store control signals , generate long-delay trip protection 1 and protection 2 device control instructions , displayed on the screen in real time and sent to the device switch unit.

[0014] As a further improvement of the technical solution, the equipment switch unit is used to perform corresponding protection operations according to risk warnings and control signals of different levels, as follows: S5.1, receiving short-delay trip protection 1 and protection 2 device control instructions And long delay trip protection 1 and protection 2 device control instructions , and risk warnings; S5.2, if it is a short-delay trip protection 1 and protection 2 device control instruction , start the short delay timer, and perform the tripping operation after the delay is reached; If it is a long-delay trip protection 1 and protection 2 device control instruction , start the long delay timer, and perform the tripping operation after the delay is reached; S5.3. After executing the tripping operation, wait for manual response to release the risk alarm.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the substation area emergency protection system, based on multi-signal combination matrix analysis and dynamic logic decision-making algorithm, the fault type can be quickly determined under different signal combination conditions and the corresponding control signal can be automatically generated, ensuring that the system still has the ability to respond quickly even if the protection device is locked or the pressure plate is not thrown.

[0016] 2. In the substation area emergency protection system, through multiple logical analysis of protection signals and pressure plate signals, risk scores are generated and graded tripping instructions are triggered to achieve real-time protection of the UHV AC / DC hybrid power grid and improve the protection reliability of the system under various fault conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall flow chart of the present invention; The meaning of each number in the figure is: 1. Protection unit; 2. Pressure plate unit; 3. Station emergency protection unit; 4. Dispatching unit; 5. Equipment switch unit. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 As shown, a substation area emergency protection system is provided, comprising: Protection unit 1, the protection unit 1 is used to monitor the operating status of the primary equipment of the substation and transmit the equipment fault signal to the station emergency protection unit 3 through the signal interface; The protection unit 1 includes a protection module 1 and a protection module 2; In this embodiment, the equipment fault signal includes a fault abnormality lockout signal, a device DC power loss signal, and an operating power loss signal; The protection module is used to monitor the protection device and to lock the fault abnormality signal of the protection device. 、The DC power supply of the device disappears and operating power failure signal Transmitted to the station area emergency protection unit 3 through the signal interface; The protection module 2 is used to monitor the protection device 2 and to lock the fault abnormality signal of the protection device 2. 、The DC power supply of the device disappears and operating power failure signal Transmitted to the station area emergency protection unit 3 through the signal interface.

[0020] In this embodiment, the fault abnormality lockout signal: when the device detects a major fault in a core component during operation, the fault abnormality lockout signal is activated, indicating that the device has lost its main protection function; DC power failure signal: When the DC power is interrupted and the device cannot operate normally, the DC power failure signal is activated to send an alarm. Operation power failure signal: monitors whether the control circuit power supply of the equipment is interrupted. If the operation power fails, it indicates that the control capability fails.

[0021] It also includes a pressure plate unit 2, which is used to monitor the function of the device and the state of the outlet pressure plate, and transmit the pressure plate fault signal to the station area emergency protection unit 3 through the signal interface; In this embodiment, the pressing plate unit 2 includes a pressing plate 1 module and a pressing plate 2 module; Among them, the pressure plate fault signal includes the function pressure plate not put into use signal and the outlet pressure plate not put into use signal; The pressure plate module is used to monitor the function pressure plate and the exit pressure plate status of the protection device, and to signal the function pressure plate of the protection device not to be put into operation. And the exit pressure plate is not put into signal Transmitted to the station area emergency protection unit 3 through the signal interface; The pressure plate module is used to monitor the function pressure plate and the exit pressure plate status of the protection device 2, and to signal the function pressure plate of the protection device 2 not to be put into operation. And the exit pressure plate is not put into signal Transmitted to the station area emergency protection unit 3 through the signal interface.

[0022] It also includes a station area emergency protection unit 3, which receives equipment fault signals and pressure plate fault signals, uses multi-signal combination matrix analysis and dynamic logic decision algorithm to analyze the fault signals, calculates the combined risk scores of different signals and obtains three levels of risk alarms, generates a control signal and sends it to the dispatching unit 4; In this embodiment, the multi-signal combination matrix analysis and dynamic logic decision algorithm is an intelligent protection algorithm implemented based on signal matrix calculation and multi-level logic judgment mechanism, which is used to comprehensively analyze multiple types of signals from the protection unit and the pressure plate unit, calculate the combined risk score, and implement three-level risk judgment and control output based on the score value. The specific logic is as follows: Signal matrix calculation: integrates all signal inputs into a protection signal matrix and platen signal matrix , and generate the combined signal matrix through matrix operations Calculate the comprehensive risk score; Multi-level logical judgment mechanism: A three-level logical judgment mechanism is set up to divide risks into three levels of risk warnings: low, medium, and high, by combining the scoring values ​​of the signal matrix, and generate corresponding control signals for each level.

[0023] In this embodiment, the combination of the signal matrix can reflect the correlation between different signals, which is helpful to identify the potential risks of multiple faults.

[0024] In this embodiment, the station area emergency protection unit 3 includes a signal receiving module, a signal analysis module and a logic decision control module; The signal receiving module is used to receive equipment fault signals and pressure plate fault signals from the protection unit 1 and the pressure plate unit 2; The signal analysis module is used to construct the equipment fault signal and the pressure plate fault signal into a protection signal matrix and platen signal matrix , and combined into a combined signal matrix , calculate the comprehensive risk score ; The logic decision control module is used to generate three-level risk warnings and corresponding control signals according to the comprehensive risk score judgment, and send them to the scheduling unit 4.

[0025] In this embodiment, the signal analysis module is used to construct the equipment fault signal and the pressure plate fault signal into a protection signal matrix and platen signal matrix , and combined into a combined signal matrix , calculate the comprehensive risk score , the specific method is as follows: S3.1.1. Constructing the protection signal matrix and platen signal matrix : ; ; S3.1.2, Extended Platen Signal Matrix Dimensions, and combined into a combined signal matrix according to the "AND" operation : ; ; in, To convert the platen signal matrix Expanded to a 2×3 dimensional pressure plate signal matrix; S3.1.3. Calculate the combined signal matrix using the Frobenius norm Comprehensive risk score : ; in, is the combined signal matrix The line number of is the combined signal matrix The column number.

[0026] In this embodiment, the logic decision control module is used to generate a three-level risk warning and a corresponding control signal according to the comprehensive risk score judgment, and send it to the scheduling unit 4. The specific method is as follows: S3.2.1. Setting risk thresholds and Based on the comprehensive risk score Determine the risk level alarm: Low risk warning: ; Medium risk warning: ; High risk warning: ; S3.2.2. According to the combined signal matrix Generate a corresponding control signal and send it to the scheduling unit 4.

[0027] In this embodiment S3.2.2, according to the combined signal matrix Generate the corresponding control signal and send it to the scheduling unit 4. The specific logic is as follows: like , protection one protection lost, generate control signal And sent to the scheduling unit 4; like , protection 2 protection lost, generate control signal And sent to the scheduling unit 4; like After a short delay, the corresponding devices of protection 1 and protection 2 are tripped, generating a control signal And sent to the scheduling unit 4; like , protection one is lost due to function / export pressure plate not being put into use, generating control signal And sent to the scheduling unit 4; like , protection 2 is lost due to function / export pressure plate not being put into use, generating control signal And sent to the scheduling unit 4; like After a long delay, the corresponding devices of protection 1 and protection 2 are tripped and a control signal is generated. And sent to the scheduling unit 4.

[0028] In this embodiment, considering that new signals and fault types may continue to appear as the equipment is running, the inventor uses a random forest model to improve the risk assessment process, as follows: For the matrix and protection signal matrix and platen signal matrix , extract the following features: Mean: ;variance: ; Standard Deviation: ; Skewness: ; Calculate correlations between multiple devices or multiple signal sources; Form the feature vector: ; Build a decision tree: ; Updated risk assessment model: ; Among them, k is the current decision tree label, K is the total number of decision trees, is the tree in the training set The sample subset used for training, It's a tree The number of samples in . is the true risk score of the i-th sample.

[0029] Finally To determine the risk level alarm.

[0030] It also includes a dispatching unit 4, which uses the EMS system to receive control signals, analyze and record control signals, display device status in real time, and generate alarm signals and control instructions to control the device switch unit 5; In this embodiment, the EMS system is an intelligent system for monitoring, managing and optimizing the operation of the power system. In substations and power grids, the EMS system is responsible for receiving, analyzing and displaying the status and control signals from various devices in real time, helping dispatchers and system automation devices to make effective power dispatch and control decisions. The EMS system is mainly used for: Receive control signals: Receive control signals from the station emergency protection system and identify fault types and risk levels.

[0031] Real-time display of equipment status: The real-time status, alarm information and other data of each equipment in the substation are displayed to the operator through a graphical interface.

[0032] Analysis and recording: Store and classify the received control signals and generate alarm logs to facilitate subsequent analysis and fault tracing; Generate control instructions: According to the fault conditions and analysis results, automatically generate corresponding control instructions and send them to the equipment switch unit 5 to perform tripping and recovery operations; In this embodiment, the dispatching unit 4 is used to receive the control signal through the EMS system, analyze and store the control signal type and generate an alarm signal and a control instruction to control the device switch unit 5. The specific method is as follows: S4.1. Analyze storage control signals , generate a protection loss alarm signal and display it on the screen in real time; S4.2. Analyze storage control signals , generate protection 2 loss of protection alarm signal, and display it on the screen in real time; S4.3. Analyze storage control signals , generate short-delay trip protection 1 and protection 2 device control instructions , displayed on the screen in real time and sent to the device switch unit 5; S4.4. Analysis of storage control signals , generate an alarm signal of protection loss due to failure of the pressure plate to be put into use, and display it on the screen in real time; S4.5. Analyze and store control signals , generate an alarm signal that the protection 2 is lost due to the failure of the pressure plate to be put into use, and display it on the screen in real time; S4.6. Analyze and store control signals , generate long-delay trip protection 1 and protection 2 device control instructions , displayed on the screen in real time and sent to the device switch unit 5.

[0033] It also includes a device switch unit 5, which is used to perform corresponding protection operations according to risk warnings and control signals of different levels; In this embodiment, the device switch unit 5 is used to perform corresponding protection operations according to risk warnings and control signals of different levels, as follows: S5.1, receiving short-delay trip protection 1 and protection 2 device control instructions And long delay trip protection 1 and protection 2 device control instructions , and risk warnings; S5.2, if it is a short-delay trip protection 1 and protection 2 device control instruction , start the short delay timer, and perform the tripping operation after the delay is reached; If it is a long-delay trip protection 1 and protection 2 device control instruction , start the long delay timer, and perform the tripping operation after the delay is reached; S5.3. After executing the tripping operation, wait for manual response to release the risk alarm.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A substation area emergency protection system, characterized in that: include: A protection unit (1), the protection unit (1) being used to monitor the operating status of primary equipment in a substation and transmit equipment fault signals to a substation emergency protection unit (3) via a signal interface; A pressure plate unit (2), the pressure plate unit (2) being used to monitor the function of the device and the state of the outlet pressure plate, and to transmit a pressure plate fault signal to a station area emergency protection unit (3) via a signal interface; A station area emergency protection unit (3), wherein the station area emergency protection unit (3) receives equipment fault signals and pressure plate fault signals, uses a multi-signal combination matrix analysis and a dynamic logic decision algorithm to analyze the fault signals, calculates combined risk scores of different signals and obtains three levels of risk warnings, generates a control signal and sends it to a dispatching unit (4); A dispatching unit (4), wherein the dispatching unit (4) uses the EMS system to receive control signals, analyze and record the control signals, display the device status in real time, and generate alarm signals and control instructions to control the device switch unit (5); An equipment switch unit (5), the equipment switch unit (5) being used to perform corresponding protection operations according to risk warnings and control signals of different levels.

2. The substation area emergency protection system according to claim 1 is characterized in that: The protection unit (1) comprises a protection module 1 and a protection module 2; Wherein, the equipment fault signal includes fault abnormality lockout signal, device DC power loss and operation power loss signal; The protection module is used to monitor the protection device and to lock the fault abnormality signal of the protection device. 、The DC power supply of the device disappears and operating power failure signal Transmitted to the station area emergency protection unit (3) via a signal interface; The protection module 2 is used to monitor the protection device 2 and to lock the fault abnormality signal of the protection device 2. 、The DC power supply of the device disappears and operating power failure signal The signal is transmitted to the station area emergency protection unit (3) through the signal interface.

3. The substation area emergency protection system according to claim 1 is characterized in that: The pressing plate unit (2) comprises a pressing plate first module and a pressing plate second module; Among them, the pressure plate fault signal includes the function pressure plate not put into use signal and the outlet pressure plate not put into use signal; The pressure plate module is used to monitor the function pressure plate and the exit pressure plate status of the protection device, and to signal the function pressure plate of the protection device not to be put into operation. And the exit pressure plate is not put into signal Transmitted to the station area emergency protection unit (3) via a signal interface; The pressure plate module is used to monitor the function pressure plate and the exit pressure plate status of the protection device 2, and to signal the function pressure plate of the protection device 2 not to be put into operation. And the exit pressure plate is not put into signal The signal is transmitted to the station area emergency protection unit (3) through the signal interface.

4. The substation area emergency protection system according to claim 1 is characterized in that: The multi-signal combination matrix analysis and dynamic logic decision algorithm is an intelligent protection algorithm implemented based on signal matrix calculation and multi-level logic judgment mechanism, which is used to comprehensively analyze multiple types of signals from protection units and pressure plate units, calculate combined risk scores, and implement three-level risk judgment and control output based on the score values. The specific logic is as follows: Signal matrix calculation: integrates all signal inputs into a protection signal matrix and platen signal matrix , and generate the combined signal matrix through matrix operations Calculate the comprehensive risk score; Multi-level logical judgment mechanism: A three-level logical judgment mechanism is set up to divide risks into three levels of risk warnings: low, medium, and high, by combining the scoring values ​​of the signal matrix, and generate corresponding control signals for each level.

5. The substation area emergency protection system according to claim 1 is characterized in that: The station area emergency protection unit (3) comprises a signal receiving module, a signal analysis module and a logic decision control module; The signal receiving module is used to receive equipment fault signals and pressure plate fault signals from the protection unit (1) and the pressure plate unit (2); The signal analysis module is used to construct the equipment fault signal and the pressure plate fault signal into a protection signal matrix and platen signal matrix , and combined into a combined signal matrix , calculate the comprehensive risk score ; The logic decision control module is used to generate a three-level risk warning and a corresponding control signal based on the comprehensive risk score judgment, and send them to the scheduling unit (4).

6. The substation area emergency protection system according to claim 5 is characterized in that: The signal analysis module is used to construct the equipment fault signal and the pressure plate fault signal into a protection signal matrix and platen signal matrix , and combined into a combined signal matrix , calculate the comprehensive risk score , the specific method is as follows: S3.1.

1. Constructing the protection signal matrix and platen signal matrix : ； ； S3.1.2, Extended Platen Signal Matrix Dimensions, and combined into a combined signal matrix according to the "AND" operation : ； ； in, To convert the platen signal matrix Expanded to a 2×3 dimensional pressure plate signal matrix; S3.1.

3. Calculate the combined signal matrix using the Frobenius norm Comprehensive risk score : ； in, is the combined signal matrix The line number of is the combined signal matrix The column number.

7. The substation area emergency protection system according to claim 6 is characterized in that: The logic decision control module is used to generate a three-level risk warning and a corresponding control signal according to the comprehensive risk score judgment, and send it to the scheduling unit (4). The specific method is as follows: S3.2.

1. Setting risk thresholds and Based on the comprehensive risk score Determine the risk level alarm: Low risk warning: ; Medium risk warning: ; High risk warning: ; S3.2.

2. According to the combined signal matrix Generate a corresponding control signal and send it to the scheduling unit (4).

8. The substation area emergency protection system according to claim 1, characterized in that: In S3.2.2, according to the combined signal matrix Generate the corresponding control signal and send it to the scheduling unit (4). The specific logic is as follows: like , protection one protection lost, generate control signal and sent to the scheduling unit (4); like , protection 2 protection lost, generate control signal and sent to the scheduling unit (4); like After a short delay, the corresponding devices of protection 1 and protection 2 are tripped, generating a control signal and sent to the scheduling unit (4); like , protection one is lost due to function / export pressure plate not being put into use, generating control signal and sent to the scheduling unit (4); like , protection 2 is lost due to function / export pressure plate not being put into use, generating control signal and sent to the scheduling unit (4); like After a long delay, the corresponding devices of protection 1 and protection 2 are tripped and a control signal is generated. And sent to the scheduling unit (4).

9. The substation area emergency protection system according to claim 1, characterized in that: The dispatching unit (4) is used to receive the control signal through the EMS system, analyze and store the control signal type and generate an alarm signal and a control instruction to control the device switch unit (5), and the specific method is as follows: S4.

1. Analyze storage control signals , generate a protection loss alarm signal and display it on the screen in real time; S4.

2. Analyze storage control signals , generate protection 2 loss of protection alarm signal, and display it on the screen in real time; S4.

3. Analyze storage control signals , generate short-delay trip protection 1 and protection 2 device control instructions , displayed on the screen in real time and sent to the device switch unit (5); S4.

4. Analysis of storage control signals , generate an alarm signal of protection loss due to failure of the pressure plate to be put into use, and display it on the screen in real time; S4.

5. Analyze and store control signals , generate an alarm signal that the protection 2 is lost due to the failure of the pressure plate to be put into use, and display it on the screen in real time; S4.

6. Analyze and store control signals , generate long-delay trip protection 1 and protection 2 device control instructions , displayed on the screen in real time and sent to the device switch unit (5).

10. The substation area emergency protection system according to claim 1, characterized in that: The equipment switch unit (5) is used to perform corresponding protection operations according to risk warnings and control signals of different levels, specifically as follows: S5.1, receiving short-delay trip protection 1 and protection 2 device control instructions And long delay trip protection 1 and protection 2 device control instructions , and risk warnings; S5.2, if it is a short-delay trip protection 1 and protection 2 device control instruction , start the short delay timer, and perform the tripping operation after the delay is reached; If it is a long-delay trip protection 1 and protection 2 device control instruction , start the long delay timer, and perform the tripping operation after the delay is reached; S5.

3. After executing the tripping operation, wait for manual response to release the risk alarm.

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