SCADA system control function analysis and evaluation method and system

Abstract

The invention discloses an SCADA system control function analysis and evaluation method and system, and relates to the technical field of power system automation, and the method comprises the steps: combining remote control process elements to form a rule base; analyzing the reason of remote control failure by utilizing a rule base and an analysis and evaluation interface; analyzing the remote control event based on the rule base; and performing statistics on the remote control events and analysis results, displaying and marking different types of problems. According to the SCADA system control function analysis and evaluation method provided by the invention, the accuracy and reliability of remote control operation are improved by establishing the rule base, the reason of remote control failure is analyzed by using the rule base and the analysis and evaluation interface, the stability and safety of power grid operation are improved, and the remote control event is analyzed based on the rule base. The remote control event processing efficiency and accuracy are improved, and better effects are achieved in the aspects of processing efficiency, timely discovery of defect hidden dangers and stability.

Description

Technical Field

[0001] The present invention relates to the technical field of power system automation, and in particular to a SCADA system control function analysis and evaluation method and system. Background Art

[0002] With the development of modern power systems, SCADA (Supervisory Control and Data Acquisition System) technology has been increasingly used in power systems. As the core technology of power system automation, SCADA system ensures the stable operation and efficient management of power grids by real-time monitoring and control of power equipment. Early SCADA systems mainly relied on manual monitoring, with relatively simple functions, mainly realizing data acquisition and simple control operations. With the development of information technology, SCADA systems have gradually introduced more automated and intelligent functions, such as automatic fault detection, remote operation, and real-time data analysis. These advances have greatly improved the operating efficiency and safety of power systems. However, with the expansion of the scale and complexity of power grids, the existing SCADA systems still have many deficiencies in the analysis and evaluation of control functions, and further improvement and optimization are urgently needed.

[0003] Although modern SCADA systems have powerful data collection and monitoring capabilities, they still face many challenges in the process of remote control operation. For example, the reasons for remote control failure are complex and diverse, involving equipment failure, communication interruption, control logic errors and other aspects. However, the existing SCADA systems often lack systematicity and accuracy in analyzing the reasons for remote control failure, and are unable to discover and solve problems in a timely manner, which affects the reliability of power system operation. In addition, most of the existing SCADA systems only stay at the level of simple data recording and statistical analysis in the evaluation of remote control operations, lack in-depth analysis and intelligent evaluation mechanisms, and are difficult to provide effective decision support for dispatching, patrol and maintenance personnel. Therefore, a new method for analyzing and evaluating the control function of the SCADA system is urgently needed. By combining the changes in flow data, alarm logic and timing, and the status of related signals during the remote control process, a systematic rule base is established, and intelligent analysis tools are used to comprehensively analyze and evaluate remote control operations to improve the operating efficiency and safety of the power system. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is that the existing SCADA system remote control operation method has the problems of inaccurate displacement information, low accuracy, low operating efficiency, and difficulty in effectively distinguishing different types of alarm signals.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a method for analyzing and evaluating the control function of a SCADA system, comprising combining remote control process elements to form a rule base; analyzing the causes of remote control failure using the rule base and an analysis and evaluation interface; analyzing remote control events based on the rule base; and statistically displaying remote control events and analysis results to mark different types of problems.

[0007] As a preferred solution of the SCADA system control function analysis and evaluation method of the present invention, wherein: the combination of remote control process elements to form a rule base includes the flow data changes in the remote control process including:

[0008] When the line interval switch is controlled under load, if the remote control is successfully executed, the original power and current of the line will suddenly change to data close to 0;

[0009] If the bay is used as the single power supply side of the busbar, when the bay switch is controlled, if the remote control is successful, the corresponding busbar voltage should change suddenly from the rated value to a value close to 0;

[0010] The bay is used as the single power supply side of the busbar. When the bay switch is closed to charge the busbar, if the remote control is successful, the voltage of the corresponding busbar should suddenly change from a data close to 0 to greater than 0.65Un.

[0011] When the line bay switch under load is closed, if the remote control is successful, the original power and current of the line will suddenly change from data close to 0 to greater than the zero drift value;

[0012] For switches, knife switches, pressure plates, and main transformer on-load voltage regulation equipment, remote control events are divided into three categories:

[0013] Remote control successful;

[0014] Remote control is successful, but there is an abnormality;

[0015] Remote control failed;

[0016] After the remote control execution command is issued, if the correct position change signal is received within 40 seconds, and the flow data changes and the status of the associated signals are correct, the remote control is considered successful;

[0017] If the correct position change signal is received, but the flow data changes or the associated signal status is abnormal, it is considered that the remote control is successful and there is an abnormality;

[0018] If the correct position change signal is not received, it is considered as remote control failure. At this time, the cause of remote control failure is determined by analyzing the changes in flow data and the status of related signals.

[0019] As a preferred solution of the SCADA system control function analysis and evaluation method of the present invention, wherein: the remote control process elements are combined to form a rule base including associated signals including:

[0020] The remote control and closing of the switch knife switch failed: KK handle is in place, the switch of the control cabinet is operated in place, the communication of the measurement and control device is interrupted, the KK handle is remotely unlocked, the corresponding position is not sent in time, the corresponding position signal is double-positioned, the control circuit is broken, the spring is not energy stored, the switch oil pressure is reduced and the alarm is sounded, the switch oil pressure is reduced and the opening and closing are locked, the motor power circuit breaker trips, the motor power failure, the control power circuit breaker trips, the control power failure, the energy storage power circuit breaker trips, the device is put into maintenance, the maintenance hard pressure plate is put into use, the knife switch mechanism handle is in place, the mechanism box handle is in place, the air pressure is low and the closing is locked, the device is locked, the device alarms, and the RTU communication is interrupted;

[0021] The remote control of the switch knife switch fails: KK handle is in place, the switch of the control cabinet is operated in place, the communication of the measurement and control device is interrupted, the KK handle is remotely unlocked, the corresponding position is not sent in time, the corresponding position signal is double-positioned, the control circuit is disconnected, the switch oil pressure is reduced and the alarm is sounded, the switch oil pressure is reduced and the opening and closing are locked, the motor power circuit breaker trips, the motor power failure, the control power circuit breaker trips, the control power failure, the energy storage power circuit breaker trips, the device is put into maintenance, the maintenance hard pressure plate is put into use, the knife switch mechanism handle is in place, the mechanism box handle is in place, the air pressure is low and the closing is locked, the device is locked, the device alarms, and the RTU communication is interrupted;

[0022] Causes of failure of on-load voltage regulation: interruption of communication with the measurement and control device, device overhaul, hard pressure plate input, voltage regulation locked, on-load voltage regulation on-site, no or incorrect change in transformer gear position, device locked, device alarm, RTU communication interruption;

[0023] Causes of failure in remote control of the pressure plate: communication interruption of the measurement and control device, the device is put into maintenance, the hard pressure plate is put into maintenance, the pressure plate input status does not change or changes incorrectly, the device is locked, the device alarms, RTU communication interruption, and the soft pressure plate is remotely put into or withdrawn.

[0024] As a preferred solution of the SCADA system control function analysis and evaluation method of the present invention, wherein: the use of the rule base and the analysis and evaluation interface to analyze the cause of the remote control failure includes studying the flow data changes, alarm logic and timing and related signal status during the remote control process, combining the remote control point table, using the rule base and the analysis and evaluation interface, analyzing the remote control process, discovering the abnormalities in the remote control event, and analyzing the cause of the remote control failure;

[0025] For cases where remote control is successful but there are exceptions, the following problems were found:

[0026] The execution was successful, but there were false alarms. During the execution, a Class I alarm signal and a position change signal occurred at the same plant station;

[0027] The execution was successful, but there was a missed alarm. When the switch was closed, the spring did not store energy and the signal did not go through the process from closing to opening.

[0028] The execution is successful, but the rule base association signal is incorrect, including:

[0029] For switches, among the related signals of KK handle on-site, switch on-site operation of control cabinet, interruption of communication of measurement and control device, remote five-protection unlocking of KK handle, disconnection of control circuit, lack of energy storage in spring, alarm of reduced oil pressure of switch, locking and closing of reduced oil pressure of switch, tripping of energy storage power supply circuit breaker, device put into maintenance, hard pressure plate put into maintenance, handle on-site of mechanism box, locking and closing of low air pressure, device locked, device alarm, and interruption of RTU communication, one or more signals are in the closed position;

[0030] For the knife switch, among the related signals of KK handle in place, communication interruption of measurement and control device, remote five-protection unlocking of KK handle, control circuit disconnection, motor power circuit breaker tripping, motor power failure, control power circuit breaker tripping, control power failure, energy storage power circuit breaker tripping, device put into maintenance, maintenance hard pressure plate put into use, knife switch mechanism handle in place, mechanism box handle in place, device locked, device alarm, and RTU communication interruption, one or more signals are in the closed position;

[0031] For on-load voltage regulation and gear adjustment, one or more of the associated signals of measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, voltage regulation lock, on-load voltage regulation local device lock, device alarm, and RTU communication interruption are in the closed position;

[0032] For the pressure plate, among the related signals such as communication interruption of the measurement and control device, device maintenance, maintenance hard pressure plate input, device lockout, device alarm, RTU communication interruption, remote soft pressure plate withdrawal, one or more signals are in the closed position;

[0033] The execution is successful, but the power flow data changes are incorrect, including:

[0034] The line interval switch control of the line under load was successfully executed, but the original power and current of the line did not suddenly change to data close to 0;

[0035] The bay is the single power supply side of a certain section of bus, but when the bay switch control is successfully executed, the corresponding bus voltage does not change from the rated value to a data close to 0;

[0036] The interval serves as the single power supply side of a certain section of the bus. The interval switch control is successfully executed, but the voltage of the corresponding bus does not change suddenly from data close to 0 to greater than 0.65Un.

[0037] As a preferred solution of the SCADA system control function analysis and evaluation method of the present invention, wherein: the use of the rule base and the analysis and evaluation interface to analyze the cause of remote control failure includes, for the case of remote control failure, analyzing the problems including:

[0038] Analyze whether the associated signal of the rule base is correct, and output the incorrect content as the analysis result; when the associated signal is abnormal, the remote control fails. At this time, the abnormal signal is output as the analysis result for reference by dispatching, patrol and maintenance personnel. The abnormal signal includes:

[0039] For switches, KK handle on-site, switch on-site operation of control cabinet, interruption of communication of measurement and control device, remote five-protection unlocking of KK handle, disconnection of control circuit, lack of energy storage in spring, alarm of reduced oil pressure of switch, locking and closing of switch due to reduced oil pressure, tripping of energy storage power supply circuit breaker, device put into maintenance, hard pressure plate put into maintenance, handle on-site of mechanism box, locking and closing of low air pressure, device locked, device alarm, and interruption of RTU communication. The signals in the closed position among the associated signals may lead to remote control failure and need to be checked in detail;

[0040] For the knife switch, the KK handle is in place, the communication of the measurement and control device is interrupted, the KK handle is remotely unlocked, the control circuit is disconnected, the motor power circuit breaker trips, the motor power failure, the control power circuit breaker trips, the control power failure, the energy storage power circuit breaker trips, the device is put into maintenance, the maintenance hard pressure plate is put into use, the knife switch mechanism handle is in place, the mechanism box handle is in place, the device is locked, the device alarms, and the RTU communication is interrupted. The signals in the closed position among the associated signals may cause remote control failure and need to be checked in detail;

[0041] For on-load voltage regulation and shifting, the signal in the closed position among the associated signals of the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, voltage blocking, on-load voltage regulation local device locking, device alarm, and RTU communication interruption may cause remote control failure and need to be checked in detail;

[0042] For the pressure plate, the communication interruption of the measurement and control device, the device maintenance, the maintenance hard pressure plate input, the device lock, the device alarm, the RTU communication interruption, and the signal of the remote soft pressure plate exit associated signal being in the closed position may cause remote control failure and need to be checked in detail;

[0043] Analyze whether the same plant station has Class I alarm signals and position change signals during remote control execution, and output the signals as analysis results to remind on-site inspections;

[0044] Analyze whether the remote control position change signal takes more than 40 seconds to be sent, or whether there is an abnormality in the position change signal, the double position signal is sent in double position, and the related equipment sends the open and closed positions at the same time;

[0045] There is a leakage alarm, the switch control fails, but the spring has not stored energy and the signal has gone through the process from closing to opening, and the position change signal is missing;

[0046] There are missed alarms and missing position change alarms. Combined with the changes in flow data, the following are judged:

[0047] The line interval switch control execution failed when the load was running, but the original power and current of the line had suddenly changed to data close to 0;

[0048] The bay is the single power supply side of the busbar. The bay switch control fails, but the voltage of the corresponding busbar changes from the rated value to a value close to 0.

[0049] The bay is the single power supply side of the busbar. The bay switch control execution fails, but the corresponding busbar voltage changes from a data close to 0 to greater than 0.65Un.

[0050] When the line interval switch under load is closed, the remote control fails, but the original power and current of the line have suddenly changed from data close to 0 to greater than the zero drift value.

[0051] As a preferred solution of the SCADA system control function analysis and evaluation method of the present invention, wherein: the analysis of remote control events based on the rule base includes when a remote control event occurs, the tool analyzes the remote control event according to the rule base and gives a brief report, and the brief report includes the remote control event, execution status, and control function correctness analysis;

[0052] Remote control events list the operation records of the remote control process and the alarms of the same plant and station in the corresponding time period, which serve as basic data for reference by dispatching, patrol and maintenance personnel;

[0053] In order to give the final analysis results, the remote control events of switches, switches, pressure plates, and main transformer on-load voltage regulation equipment are divided into three categories:

[0054] Remote control successful; Remote control successful with exception; Remote control failed;

[0055] Control function correctness analysis: For remote control success and abnormal situations, the output analysis content includes:

[0056] The execution is successful, but there is a false alarm. The false alarm signal is output as the analysis result. During the execution process, a Class I alarm signal and a position change signal occur at the same plant station;

[0057] The execution is successful, but there is a missed alarm. The missed alarm signal is output as the analysis result. When the switch is closed, the spring does not store energy and the signal does not experience the process from closing to opening.

[0058] The execution was successful, but the rule base associated signal was incorrect, which helped dispatchers, patrol and maintenance personnel to conduct investigations. The display content included:

[0059] For switches, the following are displayed: KK handle on-site, switch on-site operation of control cabinet, interruption of communication of measurement and control device, remote five-protection unlocking of KK handle, disconnection of control circuit, lack of energy storage in spring, alarm of reduced oil pressure of switch, locking and closing of reduced oil pressure of switch, tripping of energy storage power supply circuit breaker, device maintenance, maintenance hard pressure plate operation, mechanism box handle on-site, locking and closing of low air pressure, device lock, device alarm, and signals of closed position among the associated signals of RTU communication interruption;

[0060] For the knife switch, the following signals are displayed: KK handle in place, communication interruption of the measurement and control device, remote five-protection unlocking of the KK handle, control circuit disconnection, motor power circuit breaker tripping, motor power failure, control power circuit breaker tripping, control power failure, energy storage power circuit breaker tripping, device put into maintenance, maintenance hard pressure plate put into operation, knife switch mechanism handle in place, mechanism box handle in place, device locked, device alarm, RTU communication interruption, and the signals are in the closed position among the associated signals;

[0061] For on-load voltage regulation and shifting, the signal showing the closed position among the associated signals of measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, voltage regulation blocking, on-load voltage regulation local device blocking, device alarm, and RTU communication interruption is displayed;

[0062] For the pressure plate, the signal showing the closed position among the associated signals of the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, device lockout, device alarm, RTU communication interruption, and remote soft pressure plate input and output;

[0063] The execution is successful, but the power flow data changes incorrectly. Display the abnormal power flow changes, compare the data before and after the changes, and assist dispatchers, patrol and maintenance personnel in analysis, including:

[0064] The line interval switch control of the load-operated line is successfully executed, but the original power and current of the line have not suddenly changed to data close to 0. The corresponding power and current data and changes are output as analysis results;

[0065] The bay is used as the single power supply side of the busbar. When the bay switch control is successfully executed, the corresponding busbar voltage does not change from the rated value to data close to 0. The corresponding busbar voltage data and changes are output as analysis results.

[0066] The bay is the single power supply side of the busbar. The bay switch control is successfully executed, but the voltage of the corresponding busbar does not change from data close to 0 to greater than 0.65Un. The corresponding busbar voltage data and changes are output as analysis results;

[0067] The control function correctness analysis includes the case of remote control failure, and the output analysis content includes:

[0068] Analyze whether the rule base association signal is correct, and output the incorrect content as the analysis result, which is divided into:

[0069] For switches, the following are displayed: KK handle on-site, switch on-site operation of control cabinet, interruption of communication of measurement and control device, remote five-protection unlocking of KK handle, disconnection of control circuit, lack of energy storage in spring, alarm of reduced oil pressure of switch, locking and closing of reduced oil pressure of switch, tripping of energy storage power supply circuit breaker, device maintenance, maintenance hard pressure plate operation, mechanism box handle on-site, locking and closing of low air pressure, device lock, device alarm, and signals of closed position among the associated signals of RTU communication interruption;

[0070] For the knife switch, the following signals are displayed: KK handle in place, communication interruption of the measurement and control device, remote five-protection unlocking of the KK handle, control circuit disconnection, motor power circuit breaker tripping, motor power failure, control power circuit breaker tripping, control power failure, energy storage power circuit breaker tripping, device put into maintenance, maintenance hard pressure plate put into operation, knife switch mechanism handle in place, mechanism box handle in place, device locked, device alarm, RTU communication interruption, and the signals are in the closed position among the associated signals;

[0071] For on-load voltage regulation and shifting, the signal is in the closed position among the associated signals of the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, voltage regulation lock, on-load voltage regulation local device lock, device alarm, and RTU communication interruption;

[0072] For the pressure plate, the signal showing the closed position among the associated signals of the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, device lockout, device alarm, RTU communication interruption, and remote soft pressure plate input and output;

[0073] Analyze whether the same plant station has Class I alarm signals and position change signals during remote control execution, and output abnormal signals as analysis results to remind on-site inspections;

[0074] Analyze whether the remote control position change signal is sent for more than 40 seconds, or whether there is an abnormality in the position change signal. The double position signal is sent for double position error, and the related equipment sends the open and closed positions at the same time. Output the existing abnormal situation as the analysis result;

[0075] There is a missed alarm, the switch control fails, but the spring has no energy storage signal and has experienced the process from closing to opening, and the position change signal is missing. This situation is output as the analysis result;

[0076] There are missed alarms and missing position change alarms. Combined with the change of flow data, the analysis results output includes:

[0077] The line interval switch control execution failed when the load was running, but the original power and current of the line had suddenly changed to data close to 0;

[0078] The bay is the single power supply side of the busbar. The bay switch control fails, but the voltage of the corresponding busbar changes from the rated value to a value close to 0.

[0079] The bay is the single power supply side of the busbar. The bay switch control execution fails, but the corresponding busbar voltage changes from a data close to 0 to greater than 0.65Un.

[0080] When the line bay switch under load is closed, the remote control fails, but the original power and current of the line have suddenly changed from data close to 0 to greater than zero drift value;

[0081] You can check the execution status of the last remote control and the operation record of the last successful remote control.

[0082] As a preferred solution of the SCADA system control function analysis and evaluation method of the present invention, wherein: the statistical display of remote control events and analysis results and marking of different types of problems include statistical display of remote control events and analysis results, marking different types of problems, and forming a regional power grid control function analysis report;

[0083] The analysis and evaluation results include:

[0084] Statistics are collected on the number of successful remote control attempts within a specified time period; the number of successful remote control attempts with exceptions; and the number of failed attempts.

[0085] Another object of the present invention is to provide a SCADA system control function analysis and evaluation system, which can solve the problem of low accuracy of current SCADA system remote control operations by combining remote control process elements to form a rule base.

[0086] As a preferred solution of the SCADA system control function analysis and evaluation system described in the present invention, it includes: a rule base construction module, a remote control failure analysis module, a remote control event briefing formation module, and a remote control event result analysis and statistics module; the rule base construction module is used to analyze the cause of remote control failure and construct a rule base; the remote control failure analysis module is used to study the flow data changes, alarm logic and timing and related signal status during the remote control process, and analyze the cause of remote control failure; the remote control event briefing formation module is used to analyze the above-mentioned remote control events according to the rule base and give a briefing; the remote control event result analysis and statistics module is used to statistically display the remote control events and analysis results.

[0087] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of a SCADA system control function analysis and evaluation method.

[0088] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a SCADA system control function analysis and evaluation method.

[0089] Beneficial effects of the present invention: The SCADA system control function analysis and evaluation method provided by the present invention improves the accuracy and reliability of remote control operations and reduces errors caused by human factors through the establishment of a rule base, uses the rule base and the analysis and evaluation interface to analyze the causes of remote control failures, shortens the troubleshooting time, and improves the stability and safety of power grid operation. Remote control events are analyzed based on the rule base to improve the processing efficiency and accuracy of remote control events, and remote control events and analysis results are statistically displayed to mark different types of problems, thereby enhancing the visualization level of power grid management and improving the pertinence and effectiveness of problem handling. The present invention achieves better results in terms of processing efficiency, timely discovery of defects and hidden dangers, and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0091] Figure 1 The present invention provides an overall flow chart of a SCADA system control function analysis and evaluation method according to the first embodiment of the present invention.

[0092] Figure 2 A logical sequence diagram of a SCADA system control function analysis and evaluation method provided for the first embodiment of the present invention.

[0093] Figure 3 This is an example diagram of a control function analysis and evaluation report of a SCADA system control function analysis and evaluation method provided in the first embodiment of the present invention.

[0094] Figure 4 An overall flow chart of a SCADA system control function analysis and evaluation system provided for the third embodiment of the present invention. DETAILED DESCRIPTION

[0095] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0096] Example 1, reference Figure 1-Figure 3 , as an embodiment of the present invention, provides a SCADA system control function analysis and evaluation method, comprising:

[0097] S1: Combine remote control process elements to form a rule base.

[0098] Furthermore, the causes of remote control failure are analyzed, and factors such as the flow data changes, alarm logic and timing, and the status of related signals during the remote control process are combined to form a rule base.

[0099] It should be noted that (i) the changes in flow data during remote control include: 1. When the line interval switch is controlled and divided under load, if the remote control is successfully executed, the original power and current of the line (greater than the zero drift value) will suddenly change to data close to 0 (less than or equal to the zero drift value); 2. If a certain interval (the interval on the local or opposite end line or the medium and low voltage side of the main transformer) is used as the single power supply side of a certain section of bus, then when the switch of the interval is controlled and divided, if the remote control is successfully executed, the corresponding bus voltage should suddenly change from the rated value to data close to 0 (less than or equal to the zero drift value); 3. If a certain interval (the local or opposite end line or the middle and low voltage side of the main transformer) is used as the single power supply side of a certain section of bus, then when the switch of the interval is controlled and divided, if the remote control is successfully executed, the corresponding bus voltage should suddenly change from the rated value to data close to 0 (less than or equal to the zero drift value); If the medium and low voltage side intervals of the transformer are used as the single power supply side of a certain section of the bus, when the switch in the interval is closed to charge the bus, if the remote control is successfully executed, the voltage of the corresponding bus should suddenly change from a data close to 0 (less than or equal to the zero drift value) to a value greater than 0.65Un (rated voltage); 4. When the line interval switch that is about to run with load is closed, if the remote control is successfully executed, the original power and current (greater than the line zero drift value) of the line will suddenly change from a data close to 0 (less than or equal to the zero drift value) to a value greater than the zero drift value. In practice, this criterion is only used as a reference for cause analysis when execution fails.

[0100] (II) Alarm logic and timing: For switches, circuit breakers, pressure plates, and main transformer on-load voltage regulating equipment, remote control events are divided into three categories: 1. Remote control success; 2. Remote control success with anomalies; 3. Remote control failure. The latter two categories are mainly analyzed. After the remote control execution command is issued, within 40 seconds (this value varies in different regions), if the correct position change signal is received, and the flow data changes and the status of the associated signals are correct, then the remote control is deemed to be successful; if the correct position change signal is received, but the flow data changes or the status of the associated signals are abnormal, then the remote control is deemed to be successful with anomalies; if the correct position change signal is not received, then the remote control is deemed to have failed. At this time, the cause of the remote control failure can be determined by analyzing the flow data changes and the status of the associated signals.

[0101] (III) Related signals include:

[0102] 1. The remote control and closing of the switch knife switch fails: KK handle is in place, the switch of the control cabinet is operated in place, the communication of the measurement and control device is interrupted, the KK handle is remotely unlocked, the corresponding position is not sent in time, the corresponding position signal is double-positioned, the control circuit is broken, the spring is not stored (switch only), the switch oil pressure is reduced and the alarm is (switch only), the switch oil pressure is reduced and the opening and closing are locked (switch only), the motor power circuit breaker trips (knife switch only), the motor power failure (knife switch only), the control power circuit breaker trips (knife switch only), the control power failure (knife switch only), the energy storage power circuit breaker trips, the device is put into maintenance, the maintenance hard pressure plate is put into use, the knife switch mechanism handle is in place (knife switch only), the mechanism box handle is in place, the air pressure is low and the closing is locked (switch only), the device is locked, the device alarm (partial, depending on the signal that causes the alarm on site), and the RTU communication is interrupted;

[0103] 2. Causes the failure of remote control of switch knife switch: KK handle is in place, switch of control cabinet is operated in place, communication of measurement and control device is interrupted, KK handle is remotely unlocked, corresponding position is not sent in time, corresponding position signal is double-positioned, control circuit is disconnected, switch oil pressure reduction alarm (switch only), switch oil pressure reduction locks opening and closing (switch only), motor power circuit breaker trips (knife switch only), motor power failure (knife switch only), control power circuit breaker trips (knife switch only), control power failure (knife switch only), energy storage power circuit breaker trips, device is put into maintenance, maintenance hard pressure plate is put into use, knife switch mechanism handle is in place (knife switch only), mechanism box handle is in place, low air pressure locks closing (switch only), device is locked, device alarm (partial, depends on the signal that causes the alarm on site), RTU communication is interrupted;

[0104] 3. Causes of failure of on-load voltage regulation and gear adjustment: interruption of measurement and control device communication, device overhaul, maintenance hard pressure plate input, voltage regulation locked, on-load voltage regulation on-site, no change in transformer gear or incorrect change, device locked, device alarm (partial, depends on the signal causing the alarm on site), RTU communication interruption;

[0105] 4. Causes of failure in remote control of the pressure plate: communication interruption of the measurement and control device, the device is put into maintenance, the hard pressure plate is put into maintenance, the pressure plate input status does not change or changes incorrectly, the device is locked, the device alarms (partially, depending on the signal that causes the alarm on site), RTU communication interruption, and the remote soft pressure plate is exited.

[0106] S2: Analyze the causes of remote control failure using the rule base and analysis and evaluation interface.

[0107] Furthermore, we study the changes in flow data, alarm logic and timing, and related signal status during the remote control process. Combined with the remote control point table, we use the rule base and analysis and evaluation interface to help dispatching, patrol and maintenance personnel to quickly analyze the remote control process, promptly discover anomalies in remote control events, and analyze the causes of remote control failures.

[0108] It should be noted that (i) for the situation of "remote control is successful, but there are abnormalities", the following problems can be found:

[0109] 1. The execution is successful, but there may be false alarms: during the execution, a Class I alarm signal and a position change signal occur at the same plant station;

[0110] 2. The execution is successful, but there are missed alarms: the spring does not store energy when the switch is closed, and the signal does not go through the process from "close to open" (or the switch oil pressure reduction alarm signal does not go through the process from "close to open" when the switch is open or closed, and the switch oil pressure reduction lockout closing and opening signal does not go through the process from "close to open");

[0111] 3. The execution is successful, but the associated signals in the rule base are incorrect, which are subdivided into: ① For switches, KK handle is in place, switch of the control cabinet is in place, communication of the measurement and control device is interrupted, KK handle is remotely unlocked for five protections, control circuit is disconnected, spring is not energy stored (switch only), switch oil pressure reduction alarm (switch only), switch oil pressure reduction locks opening and closing (switch only), energy storage power circuit breaker trips, device is put into maintenance, maintenance hard pressure plate is put into use, mechanism box handle is in place, low air pressure locks closing (switch only), device is locked, device alarm (partial, depends on the signal that causes the alarm on site), RTU communication is interrupted and other associated signals, one or more signals are in the closed position; ② For knife switches, KK handle is in place, communication of the measurement and control device is interrupted, KK handle is remotely unlocked for five protections, control circuit is disconnected, motor power circuit breaker trips (knife switch only), motor power failure (knife switch only), control power circuit breaker trips (knife switch only), control ... circuit breaker trips (knife switch only), control power circuit breaker trips (knife switch only), control power circuit breaker trips (knife switch only), control power circuit breaker trips (knife switch only), control power circuit breaker trips (knife switch only), control power circuit breaker trips (knife switch only), control power circuit breaker trip 1. For the source failure (only knife switch), energy storage power supply circuit breaker tripping, device put into maintenance, maintenance hard pressure plate put into operation, knife switch mechanism handle in place (only knife switch), mechanism box handle in place, device locked, device alarm (partially, depends on the signal causing the alarm on site), RTU communication interruption and other related signals, one or more signals are in the closed position; 2. For on-load voltage regulation and gear adjustment, one or more signals are in the closed position among the related signals such as measurement and control device communication interruption, device put into maintenance, maintenance hard pressure plate put into operation, locked voltage regulation, on-load voltage regulation local device locked, device alarm (partially, depends on the signal causing the alarm on site), RTU communication interruption and other related signals; 3. For the pressure plate, one or more signals are in the closed position among the related signals such as measurement and control device communication interruption, device put into maintenance, maintenance hard pressure plate put into operation, device locked, device alarm (partially, depends on the signal causing the alarm on site), RTU communication interruption, remote soft pressure plate withdrawal and other related signals.

[0112] 4. The execution is successful, but the flow data changes incorrectly: ① The switch control of the line interval running under load is successfully executed, but the original power and current of the line (greater than zero drift value) do not suddenly change to data close to 0 (less than or equal to zero drift value); ② A certain interval (the local or opposite line or the interval on the medium and low voltage side of the main transformer) is used as the single power supply side of a certain section of bus, but when the switch control of this interval is successfully executed, the corresponding bus voltage does not suddenly change from the rated value to data close to 0 (less than or equal to zero drift value); ③ A certain interval (the local or opposite line or the interval on the medium and low voltage side of the main transformer) is used as the single power supply side of a certain section of bus, and the switch control of this interval is successfully executed, but the voltage of the corresponding bus does not suddenly change from data close to 0 (less than or equal to zero drift value) to greater than 0.65Un (rated voltage).

[0113] (II) For the case of "remote control failure", you can analyze the following questions to find out the possible reasons for the remote control failure:

[0114] 1. Analyze whether the rule base association signal is correct and output the incorrect content as the analysis result. When the associated signal is abnormal, it will cause remote control failure. At this time, the abnormal signal can be output as the analysis result for reference by dispatching, patrol and maintenance personnel: ① For switches, KK handle on-site, switch on-site operation of the control cabinet, communication interruption of the measurement and control device, remote five-protection unlocking of the KK handle, control circuit disconnection, spring no energy storage (switch only), switch oil pressure reduction alarm (switch only), switch oil pressure reduction lock opening and closing (switch only), energy storage power supply circuit breaker tripping, device maintenance, maintenance hard pressure plate input, mechanism box handle on-site, low air pressure lock closing (switch only), device lock, device alarm (partial, depends on the signal causing the alarm on site), RTU communication interruption and other associated signals that are in the closed position may cause remote control failure, which needs to be checked in detail; ② For knife switches, KK handle on-site, communication interruption of the measurement and control device, remote five-protection unlocking of the KK handle, control circuit disconnection, motor power circuit breaker tripping (knife switch only), motor power failure (knife switch only), control power circuit breaker tripping (knife switch only), Control power failure (only knife switch), energy storage power circuit breaker tripping, device maintenance, maintenance hard pressure plate input, knife switch mechanism handle in place (only knife switch), mechanism box handle in place, device locked, device alarm (partially, depends on the signal causing the alarm on site), RTU communication interruption and other related signals with the closed signal may cause remote control failure, which needs to be checked in detail; ③ For on-load voltage regulation and gear adjustment, the communication interruption of the measurement and control device, the device maintenance, maintenance hard pressure plate input, locked voltage regulation, on-load voltage regulation local device locked, device alarm (partially, depends on the signal causing the alarm on site), RTU communication interruption and other related signals with the closed signal may cause remote control failure, which needs to be checked in detail; ④ For the pressure plate, the communication interruption of the measurement and control device, the device maintenance, maintenance hard pressure plate input, device locked, device alarm (partially, depends on the signal causing the alarm on site), RTU communication interruption, remote soft pressure plate exit and other related signals with the closed signal may cause remote control failure, which needs to be checked in detail;

[0115] 2. Analyze whether Class I alarm signals and other position change signals appear in the same plant during remote control execution, and output these signals as analysis results to remind on-site inspection;

[0116] 3. Analyze whether the remote control position change signal takes more than 40 seconds to be sent, or whether there is any abnormality in the position change signal, such as double position signal sending double position error, and related equipment sending open and close positions at the same time;

[0117] 4. There is a missing alarm, the switch fails to close, but the spring no energy storage signal has gone through the process of "closing-opening" (or the switch oil pressure reduction alarm signal during the switch opening and closing has gone through the process of "closing-opening"), and the displacement signal is missing;

[0118] 5. There are missed alarms and missing position change alarms. Combined with the change of flow data, it can be divided into: ① The switch control of the line interval running under load fails, but the original power and current of the line (greater than zero drift value) have suddenly changed to data close to 0 (less than or equal to zero drift value); ② A certain interval (the interval on the medium and low voltage side of the local or opposite end line or the main transformer) is used as the single power supply side of a certain section of bus. The switch control of this interval fails, but the voltage of the corresponding bus changes from the rated value to a data close to 0 (less than or equal to zero drift value); ③ A certain interval (the interval on the medium and low voltage side of the local or opposite end line or the main transformer) is used as the single power supply side of a certain section of bus. The switch control of this interval fails, but the voltage of the corresponding bus changes from a data close to 0 (less than or equal to zero drift value) to greater than 0.65Un (rated voltage). ④ When the switch control of the line interval running under load is about to be closed, the remote control fails, but the original power and current of the line (greater than the zero drift value) have suddenly changed from data close to 0 (less than or equal to zero drift value) to greater than zero drift value.

[0119] S3: Analyze remote control events based on the rule base.

[0120] Furthermore, when a remote control event occurs, the tool analyzes the remote control event according to the rule base and gives a brief report, which should include the main contents such as the remote control event, execution status, and control function correctness analysis.

[0121] It should be noted that: (i) Remote control events: the operation records of the remote control process and the alarms of the same plant and station in the corresponding time period are listed as basic data for reference by dispatching, patrol and maintenance personnel;

[0122] (II) Execution status: The final analysis results are given. For switches, switches, pressure plates, and main transformer on-load voltage regulation equipment, remote control events are divided into three categories: 1. Remote control success; 2. Remote control success with anomalies; 3. Remote control failure. The latter two categories are mainly analyzed.

[0123] (III) Analysis of control function correctness: For the case of "remote control successful, but abnormality exists", the following analysis contents can be output:

[0124] 1. The execution is successful, but there may be false alarms, and the false alarm signals are output as analysis results: during the execution process, Class I alarm signals and position change signals occur at the same plant station.

[0125] 2. The execution is successful, but there is a missed alarm. The missed alarm signal is output as the analysis result: the spring energy storage signal does not go through the process from "close-open" when the switch is closed (or the switch oil pressure reduction alarm signal does not go through the process from "close-open" when the switch is closed or open, and the switch oil pressure reduction lockout closing and opening signal does not go through the process from "close-open");

[0126] 3. The execution is successful, but the associated signals in the rule base are incorrect. The following content is displayed to help dispatching, patrol and maintenance personnel to quickly conduct troubleshooting: ① For switches, the KK handle is in place, the switch of the control cabinet is operated in place, the communication of the measurement and control device is interrupted, the KK handle is remotely unlocked for five protections, the control circuit is disconnected, the spring is not stored in energy (switch only), the switch oil pressure reduction alarm (switch only), the switch oil pressure reduction locks the opening and closing (switch only), the energy storage power supply circuit breaker trips, the device is put into maintenance, the maintenance hard pressure plate is put into use, the mechanism box handle is in place, the air pressure is low and the circuit breaker is locked (switch only), the device is locked, the device alarm (partial, depends on the signal that causes the alarm on site), RTU communication interruption and other associated signals are closed signals; ② For knife switches, the KK handle is in place, the communication of the measurement and control device is interrupted, the KK handle is remotely unlocked for five protections, the control circuit is disconnected, the motor power circuit breaker trips (knife switch only), the motor power supply failure (knife switch only), Control power circuit breaker tripping (only knife switch), control power failure (only knife switch), energy storage power circuit breaker tripping, device put into maintenance, maintenance hard pressure plate put into operation, knife switch mechanism handle in place (only knife switch), mechanism box handle in place, device locked, device alarm (partially, depends on the signal causing the alarm on site), RTU communication interruption and other related signals are closed signals; ③ For on-load voltage regulation and gear adjustment, display the related signals such as measurement and control device communication interruption, device put into maintenance, maintenance hard pressure plate put into operation, locked voltage regulation, on-load voltage regulation local device locked, device alarm (partially, depends on the signal causing the alarm on site), RTU communication interruption and other related signals are closed signals; ④ For the pressure plate, display the related signals such as measurement and control device communication interruption, device put into maintenance, maintenance hard pressure plate put into operation, device locked, device alarm (partially, depends on the signal causing the alarm on site), RTU communication interruption, remote soft pressure plate withdrawal and other related signals are closed signals.

[0127] 4. The execution is successful, but the flow data changes incorrectly. The abnormal flow changes are displayed, and the data before and after the changes are compared to assist the dispatching, patrol and maintenance personnel in analysis: ① The switch control of the line interval running with load is successfully executed, but the original power and current (greater than zero drift value) of the line have not suddenly changed to data close to 0 (less than or equal to zero drift value). The corresponding power and current data and changes are output as analysis results; ② A certain interval (the interval on the medium and low voltage side of the local and opposite lines or the main transformer) is used as the single power side of a certain section of bus, but when the switch control of this interval is successfully executed, the corresponding bus voltage has not suddenly changed from the rated value to a data close to 0 (less than or equal to zero drift value). The corresponding bus voltage data and changes are output as analysis results; ③ A certain interval (the interval on the medium and low voltage side of the local and opposite lines or the main transformer) is used as the single power side of a certain section of bus. The switch control of this interval is successfully executed, but the voltage of the corresponding bus has not suddenly changed from a data close to 0 (less than or equal to zero drift value) to a value greater than 0.65Un (rated voltage). The corresponding bus voltage data and changes are output as analysis results.

[0128] (IV) Analysis of control function correctness: For the case of "remote control failure", the following analysis content can be output:

[0129] 1. Analyze whether the associated signals of the rule base are correct, and output the incorrect content as the analysis result. It is subdivided into: ① For switches, display the KK handle in place, the switch of the control cabinet in place, the communication of the measurement and control device is interrupted, the KK handle remote five-protection unlocking, the control circuit is disconnected, the spring is not energy stored (switch only), the switch oil pressure reduction alarm (switch only), the switch oil pressure reduction locks the opening and closing (switch only), the energy storage power supply circuit breaker trips, the device is put into maintenance, the maintenance hard pressure plate is put into use, the mechanism box handle is in place, the air pressure is low and the closing is locked (switch only), the device is locked, the device alarm (partial, depends on the signal that causes the alarm on site), RTU communication interruption and other associated signals are closed signals; ② For knife switches, display the KK handle in place, the communication of the measurement and control device is interrupted, the KK handle remote five-protection unlocking, the control circuit is disconnected, the motor power circuit breaker trips (knife switch only), the motor power failure (knife switch only), the control power circuit breaker trips (knife switch only), the control power failure (only knife switch), energy storage power circuit breaker tripping, device maintenance, maintenance hard pressure plate input, knife switch mechanism handle in place (only knife switch), mechanism box handle in place, device locked, device alarm (partial, depends on the signal causing the alarm on site), RTU communication interruption and other related signals are closed signals; ③ For on-load voltage regulation and gear adjustment, the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, locked voltage regulation, on-load voltage regulation local device locked, device alarm (partial, depends on the signal causing the alarm on site), RTU communication interruption and other related signals are closed signals; ④ For the pressure plate, display the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, device locked, device alarm (partial, depends on the signal causing the alarm on site), RTU communication interruption, remote soft pressure plate withdrawal and other related signals are closed signals;

[0130] 2. Analyze whether Class I alarm signals and other position change signals appear in the same plant during remote control execution, and output these abnormal signals as analysis results to remind on-site inspection;

[0131] 3. Analyze whether the remote control position change signal is sent for more than 40 seconds, or whether there is any abnormality in the position change signal, such as double position error in sending double position signals, and related equipment sends open and close positions at the same time, and output the existing abnormality as the analysis result;

[0132] 4. There is a missed alarm, the switch control fails, but the spring no energy storage signal has experienced the process of "closing-opening" (or the switch oil pressure reduction alarm signal during the switch control opening and closing has experienced the process of "closing-opening"), and the displacement signal is missing. This situation is output as the analysis result;

[0133] 5. There are missed alarms and missing position change alarms. Combined with the change of flow data, the following situations are output as analysis results: ① The switch control of the line interval running under load fails, but the original power and current of the line (greater than zero drift value) have suddenly changed to data close to 0 (less than or equal to zero drift value); ② A certain interval (the interval on the medium and low voltage side of the local or opposite end line or the main transformer) is used as the single power supply side of a certain section of bus. The switch control of this interval fails, but the voltage of the corresponding bus changes from the rated value to a data close to 0 (less than or equal to zero drift value); ③ A certain interval (the interval on the medium and low voltage side of the local or opposite end line or the main transformer) is used as the single power supply side of a certain section of bus. The switch control of this interval fails, but the voltage of the corresponding bus changes from a data close to 0 (less than or equal to zero drift value) to greater than 0.65Un (rated voltage). ④ When the switch control of the line interval running under load is about to be closed, the remote control execution fails, but the original power and current of the line (greater than the zero drift value) have suddenly changed from data close to 0 (less than or equal to zero drift value) to greater than zero drift value.

[0134] (V) Other contents: You can check the execution status of the last remote control and the operation record of the last successful remote control.

[0135] S4: Statistics of remote control events and analysis results are displayed to mark different types of problems.

[0136] Furthermore, the study conducts statistical display of remote control events and analysis results, marking different types of problems, so that dispatching and operation personnel can find hidden defects in the remote control process, and can also form a regional power grid control function analysis report to report to the superior unit. The analysis and evaluation results include: 1. Within the specified time period: 1. Remote control is successful XX times; 2. Remote control is successful with abnormalities, XX times. 3. Failure XX times (the specific reasons for failure can be viewed through the briefing).

[0137] Embodiment 2, an embodiment of the present invention, provides a method for analyzing and evaluating the control function of a SCADA system. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0138] First, in order to verify the effectiveness of a SCADA system control function analysis and evaluation method, a detailed experimental design was carried out, including an experimental group and a control group. The experimental group applied the method of the present invention, while the control group applied the existing technology to perform remote control operation analysis. The experimental steps are as follows:

[0139] Test preparation:

[0140] Equipment preparation: main and standby SCADA systems and workstations, line interval switches, main transformer on-load voltage regulation equipment, switchgear and other related power equipment. The standby SCADA system workstation is equipped with SCADA system control function analysis and evaluation tools. The main SCADA system is used as the control group, and the standby SCADA system is used as the experimental group.

[0141] Data collection: The test lasts for 30 days. Before the experiment, the data of the main and standby SCADA systems are compared and checked to ensure that the telemetering data of the main and standby SCADA systems are consistent, and the error of telemetry data is no more than 5%. The remote control and remote adjustment functions are implemented in the main SCADA system, and the standby SCADA system only synchronizes the remote control operation records.

[0142] Establishment of rule base: The SCADA system control function analysis and evaluation tool is configured on the standby SCADA system workstation, and a detailed rule base is established based on the flow data changes, alarm logic and timing, and related signal status during the remote control process. Specifically, it includes: line power and current changes when the line interval switch is controlled; bus voltage changes when the interval switch on the single power supply side of the bus is controlled to open and close; detailed records of various alarm signals and related signals.

[0143] Implementation process:

[0144] Remote control operation execution: Within 30 days, the control group's main SCADA system implemented remote control and remote adjustment functions, and synchronized the operation records to the experimental group's backup SCADA system as input data for the experimental group's SCADA system control function analysis and evaluation tool.

[0145] After each operation, the control group recorded the results of the remote control operation, and recorded the abnormal situations such as false alarms and missed alarms found during the remote control process, and counted the time consumed in troubleshooting the problems. The experimental group used the SCADA system control function analysis and evaluation tool to record relevant data and equipment status.

[0146] Data Analysis:

[0147] Experimental group: Analyze the reasons for each remote control failure using the rule base and analysis and evaluation interface. The system automatically evaluates the execution of remote control events, determines whether they are successful, abnormal, or failed, and displays statistics on remote control events and analysis results.

[0148] Control group: Use existing technology to manually record and analyze remote control operations. Evaluate remote control operations based on position change signals, equipment status, and flow data changes, and record the results manually.

[0149] Result recording: The experimental data of the experimental group and the control group were recorded in a table, including the detailed values ​​of each parameter, to facilitate subsequent analysis and comparison.

[0150] Table 1 Experimental data table

[0151]

[0152]

[0153] Analysis time:

[0154] The analysis time of the experimental group was significantly lower than that of the control group. The total analysis and statistics time of the experimental group was 59,400 seconds, while the total analysis and statistics time of the control group was 235 seconds.

[0155] Through the automated rule base analysis of the SCADA system control function analysis and evaluation tool, the experimental group was able to quickly and accurately complete data processing and result output without relying on the experience of the dispatching and monitoring personnel, reducing manual intervention and processing time, timely identifying the cause of remote control failure, and improving the remote control success rate.

[0156] Found hidden dangers and defects in equipment:

[0157] The control group found 4 "remote control was successful, but there were abnormalities" events, while the experimental group found 39 "remote control was successful, but there were abnormalities". After verification by on-site professionals, all 39 "remote control was successful, but there were abnormalities" found by the experimental group were true. It can be seen that the SCADA system control function analysis and evaluation tool can quickly discover hidden defects and hidden dangers of on-site equipment, ensuring the safe operation of the power grid.

[0158] stability:

[0159] The control group relied on manual experience to analyze remote control failures and anomalies. All four "remote control success with anomalies" were discovered by dispatchers with more than five years of service. The experimental group relied on the SCADA system control function analysis and evaluation tool, not the dispatcher's experience. The generated briefings were systematic, objective, and complete. The changes in telesignaling and telemetry data in the briefings were consistent with the actual situation. Maintenance personnel could also view the briefings through the SCADA system web function to improve fault handling efficiency.

[0160] In summary, the present invention achieves better results in processing efficiency, timely discovery of defects and hidden dangers, and stability.

[0161] Example 3, reference Figure 4 , which is an embodiment of the present invention, provides a SCADA system control function analysis and evaluation system, including a rule base construction module, a remote control failure analysis module, a remote control event briefing formation module, and a remote control event result analysis and statistics module.

[0162] The rule base construction module is used to analyze the causes of remote control failure and build a rule base. The remote control failure analysis module is used to study the changes in flow data, alarm logic and timing, and related signal status during the remote control process, and analyze the causes of remote control failure. The remote control event briefing formation module is used to analyze the above remote control events according to the rule base and give a briefing. The remote control event result analysis and statistics module is used to statistically display remote control events and analysis results.

[0163] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0164] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0165] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0166] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc. It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limited. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

[0167] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A SCADA system control function analysis and evaluation method, characterized in that: include: Combine remote control process elements to form a rule base; Analyze the causes of remote control failure using the rule base and analysis and evaluation interface; Analyze remote control events based on the rule base; Statistics of remote control events and analysis results are displayed to mark different types of problems.

2. The SCADA system control function analysis and evaluation method as claimed in claim 1, characterized in that: The combining of remote control process elements to form a rule base includes the flow data changes in the remote control process including: When the line interval switch is controlled under load, if the remote control is successfully executed, the original power and current of the line will suddenly change to data close to 0; If the bay is used as the single power supply side of the busbar, when the bay switch is controlled, if the remote control is successful, the corresponding busbar voltage should change suddenly from the rated value to a value close to 0; The bay is used as the single power supply side of the busbar. When the bay switch is closed to charge the busbar, if the remote control is successful, the voltage of the corresponding busbar should suddenly change from a data close to 0 to greater than 0.65Un. When the line bay switch under load is closed, if the remote control is successful, the original power and current of the line will suddenly change from data close to 0 to greater than the zero drift value; For switches, knife switches, pressure plates, and main transformer on-load voltage regulation equipment, remote control events are divided into three categories: Remote control is successful; Remote control is successful, but there is an abnormality; Remote control failed; After the remote control execution command is issued, if the correct position change signal is received within 40 seconds, and the flow data changes and the status of the associated signals are correct, the remote control is considered successful; If the correct position change signal is received, but the flow data changes or the associated signal status is abnormal, it is considered that the remote control is successful and there is an abnormality; If the correct position change signal is not received, it is considered as remote control failure. At this time, the cause of remote control failure is determined by analyzing the changes in flow data and the status of related signals.

3. The SCADA system control function analysis and evaluation method as claimed in claim 2, characterized in that: The combining of remote control process elements to form a rule base includes associating signals including: The remote control and closing of the switch knife switch failed: KK handle is in place, the switch of the control cabinet is operated in place, the communication of the measurement and control device is interrupted, the KK handle is remotely unlocked, the corresponding position is not sent in time, the corresponding position signal is double-positioned, the control circuit is broken, the spring is not energy stored, the switch oil pressure is reduced and the alarm is sounded, the switch oil pressure is reduced and the opening and closing are locked, the motor power circuit breaker trips, the motor power failure, the control power circuit breaker trips, the control power failure, the energy storage power circuit breaker trips, the device is put into maintenance, the maintenance hard pressure plate is put into use, the knife switch mechanism handle is in place, the mechanism box handle is in place, the air pressure is low and the closing is locked, the device is locked, the device alarms, and the RTU communication is interrupted; The remote control of the switch knife switch fails: KK handle is in place, the switch of the control cabinet is operated in place, the communication of the measurement and control device is interrupted, the KK handle is remotely unlocked, the corresponding position is not sent in time, the corresponding position signal is double-positioned, the control circuit is disconnected, the switch oil pressure is reduced and the alarm is sounded, the switch oil pressure is reduced and the opening and closing are locked, the motor power circuit breaker trips, the motor power failure, the control power circuit breaker trips, the control power failure, the energy storage power circuit breaker trips, the device is put into maintenance, the maintenance hard pressure plate is put into use, the knife switch mechanism handle is in place, the mechanism box handle is in place, the air pressure is low and the closing is locked, the device is locked, the device alarms, and the RTU communication is interrupted; Causes of failure of on-load voltage regulation: interruption of communication with the measurement and control device, device overhaul, hard pressure plate input, voltage regulation locked, on-load voltage regulation on-site, no or incorrect change in transformer gear position, device locked, device alarm, RTU communication interruption; Causes of failure in remote control of the pressure plate: communication interruption of the measurement and control device, the device is put into maintenance, the hard pressure plate is put into maintenance, the pressure plate input status does not change or changes incorrectly, the device is locked, the device alarms, RTU communication interruption, and the soft pressure plate is remotely put into or withdrawn.

4. The SCADA system control function analysis and evaluation method as claimed in claim 3, characterized in that: The use of the rule base and the analysis and evaluation interface to analyze the cause of the remote control failure includes studying the flow data changes, alarm logic and timing, and related signal status during the remote control process, combining the remote control point table, using the rule base and the analysis and evaluation interface to analyze the remote control process, discovering the anomalies in the remote control event, and analyzing the cause of the remote control failure; For cases where remote control is successful but there are exceptions, the following problems were found: The execution was successful, but there were false alarms. During the execution, a Class I alarm signal and a position change signal occurred at the same plant station; The execution was successful, but there was a missed alarm. When the switch was closed, the spring did not store energy and the signal did not go through the process from closing to opening. The execution is successful, but the rule base association signal is incorrect, including: For switches, among the related signals of KK handle on-site, switch on-site operation of control cabinet, interruption of communication of measurement and control device, remote five-protection unlocking of KK handle, disconnection of control circuit, lack of energy storage in spring, alarm of reduced oil pressure of switch, locking and closing of reduced oil pressure of switch, tripping of energy storage power supply circuit breaker, device put into maintenance, hard pressure plate put into maintenance, handle on-site of mechanism box, locking and closing of low air pressure, device locked, device alarm, and interruption of RTU communication, one or more signals are in the closed position; For the knife switch, among the related signals of KK handle in place, communication interruption of measurement and control device, remote five-protection unlocking of KK handle, control circuit disconnection, motor power circuit breaker tripping, motor power failure, control power circuit breaker tripping, control power failure, energy storage power circuit breaker tripping, device put into maintenance, maintenance hard pressure plate put into use, knife switch mechanism handle in place, mechanism box handle in place, device locked, device alarm, and RTU communication interruption, one or more signals are in the closed position; For on-load voltage regulation and gear adjustment, one or more of the associated signals of measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, voltage regulation lock, on-load voltage regulation local device lock, device alarm, and RTU communication interruption are in the closed position; For the pressure plate, among the related signals such as communication interruption of the measurement and control device, device maintenance, maintenance hard pressure plate input, device lockout, device alarm, RTU communication interruption, remote soft pressure plate withdrawal, one or more signals are in the closed position; The execution is successful, but the power flow data changes are incorrect, including: The line interval switch control of the line under load was successfully executed, but the original power and current of the line did not suddenly change to data close to 0; The bay is the single power supply side of a certain section of bus, but when the bay switch control is successfully executed, the corresponding bus voltage does not change from the rated value to a data close to 0; The interval serves as the single power supply side of a certain section of the bus. The interval switch control is successfully executed, but the voltage of the corresponding bus does not change suddenly from data close to 0 to greater than 0.65Un.

5. The SCADA system control function analysis and evaluation method as claimed in claim 4, characterized in that: The use of the rule base and the analysis and evaluation interface to analyze the cause of the remote control failure includes analyzing the following issues in the case of remote control failure: Analyze whether the associated signal of the rule base is correct, and output the incorrect content as the analysis result; when the associated signal is abnormal, the remote control fails. At this time, the abnormal signal is output as the analysis result for reference by dispatching, patrol and maintenance personnel. The abnormal signal includes: For switches, KK handle on-site, switch on-site operation of control cabinet, interruption of communication of measurement and control device, remote five-protection unlocking of KK handle, disconnection of control circuit, lack of energy storage in spring, alarm of reduced oil pressure of switch, locking and closing of switch due to reduced oil pressure, tripping of energy storage power supply circuit breaker, device put into maintenance, hard pressure plate put into maintenance, handle on-site of mechanism box, locking and closing of low air pressure, device locked, device alarm, and interruption of RTU communication. The signals in the closed position among the associated signals may lead to remote control failure and need to be checked in detail; For the knife switch, the KK handle is in place, the communication of the measurement and control device is interrupted, the KK handle is remotely unlocked, the control circuit is disconnected, the motor power circuit breaker trips, the motor power failure, the control power circuit breaker trips, the control power failure, the energy storage power circuit breaker trips, the device is put into maintenance, the maintenance hard pressure plate is put into use, the knife switch mechanism handle is in place, the mechanism box handle is in place, the device is locked, the device alarms, and the RTU communication is interrupted. The signals in the closed position among the associated signals may cause remote control failure and need to be checked in detail; For on-load voltage regulation and shifting, the signal in the closed position among the associated signals of the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, voltage blocking, on-load voltage regulation local device locking, device alarm, and RTU communication interruption may cause remote control failure and need to be checked in detail; For the pressure plate, the communication interruption of the measurement and control device, the device maintenance, the maintenance hard pressure plate input, the device lock, the device alarm, the RTU communication interruption, and the signal of the remote soft pressure plate exit associated signal being in the closed position may cause remote control failure and need to be checked in detail; Analyze whether the same plant station has Class I alarm signals and position change signals during remote control execution, and output the signals as analysis results to remind on-site inspections; Analyze whether the remote control position change signal takes more than 40 seconds to be sent, or whether there is an abnormality in the position change signal, the double position signal is sent in double position, and the related equipment sends the open and closed positions at the same time; There is a leakage alarm, the switch control fails, but the spring has not stored energy and the signal has experienced the process from closing to opening, and the position change signal is missing; There are missed alarms and missing position change alarms. Combined with the changes in flow data, the following are judged: The line interval switch control of the line under load operation failed, but the original power and current of the line had suddenly changed to data close to 0; The bay is the single power supply side of the busbar. The bay switch control fails, but the voltage of the corresponding busbar changes from the rated value to a value close to 0. The bay is the single power supply side of the busbar. The bay switch control execution fails, but the corresponding busbar voltage changes from a data close to 0 to greater than 0.65Un. When the line interval switch under load is closed, the remote control fails, but the original power and current of the line have suddenly changed from data close to 0 to greater than the zero drift value.

6. The SCADA system control function analysis and evaluation method as claimed in claim 5, characterized in that: The analysis of remote control events based on the rule base includes that when a remote control event occurs, the tool analyzes the remote control event according to the rule base and gives a brief report, the brief report includes the remote control event, execution status, and control function correctness analysis; Remote control events list the operation records of the remote control process and the alarms of the same plant and station in the corresponding time period, which serve as basic data for reference by dispatching, patrol and maintenance personnel; In order to give the final analysis results, the remote control events of switches, switches, pressure plates, and main transformer on-load voltage regulation equipment are divided into three categories: Remote control successful; Remote control successful with exception; Remote control failed; Control function correctness analysis: For remote control success and abnormal situations, the output analysis content includes: The execution is successful, but there is a false alarm. The false alarm signal is output as the analysis result. During the execution process, a Class I alarm signal and a position change signal occur at the same plant station; The execution is successful, but there is a missed alarm. The missed alarm signal is output as the analysis result. When the switch is closed, the spring does not store energy and the signal does not experience the process from closing to opening. The execution was successful, but the rule base associated signal was incorrect, which helped dispatchers, patrol and maintenance personnel to conduct investigations. The display content included: For switches, the following are displayed: KK handle on-site, switch on-site operation of control cabinet, interruption of communication of measurement and control device, remote five-protection unlocking of KK handle, disconnection of control circuit, lack of energy storage in spring, alarm of reduced oil pressure of switch, locking and closing of reduced oil pressure of switch, tripping of energy storage power supply circuit breaker, device maintenance, maintenance hard pressure plate operation, mechanism box handle on-site, locking and closing of low air pressure, device lock, device alarm, and signals of closed position among the associated signals of RTU communication interruption; For the knife switch, the following signals are displayed: KK handle in place, communication interruption of the measurement and control device, remote five-protection unlocking of the KK handle, control circuit disconnection, motor power circuit breaker tripping, motor power failure, control power circuit breaker tripping, control power failure, energy storage power circuit breaker tripping, device put into maintenance, maintenance hard pressure plate put into operation, knife switch mechanism handle in place, mechanism box handle in place, device locked, device alarm, RTU communication interruption, and the signals are in the closed position among the associated signals; For on-load voltage regulation and shifting, the signal showing the closed position among the associated signals of measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, voltage regulation blocking, on-load voltage regulation local device blocking, device alarm, and RTU communication interruption is displayed; For the pressure plate, the signal showing the closed position among the associated signals of the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, device lockout, device alarm, RTU communication interruption, and remote soft pressure plate input and output; The execution is successful, but the power flow data changes incorrectly. Display the abnormal power flow changes, compare the data before and after the changes, and assist dispatchers, patrol and maintenance personnel in analysis, including: The line interval switch control of the load-operated line is successfully executed, but the original power and current of the line have not suddenly changed to data close to 0. The corresponding power and current data and changes are output as analysis results; The bay is used as the single power supply side of the busbar. When the bay switch control is successfully executed, the corresponding busbar voltage does not change from the rated value to data close to 0. The corresponding busbar voltage data and changes are output as analysis results. The bay is the single power supply side of the busbar. The bay switch control is successfully executed, but the voltage of the corresponding busbar does not change from data close to 0 to greater than 0.65Un. The corresponding busbar voltage data and changes are output as analysis results; The control function correctness analysis includes the case of remote control failure, and the output analysis content includes: Analyze whether the rule base association signal is correct, and output the incorrect content as the analysis result, which is divided into: For switches, the following are displayed: KK handle on-site, switch on-site operation of control cabinet, interruption of communication of measurement and control device, remote five-protection unlocking of KK handle, disconnection of control circuit, lack of energy storage in spring, alarm of reduced oil pressure of switch, locking and closing of reduced oil pressure of switch, tripping of energy storage power supply circuit breaker, device maintenance, maintenance hard pressure plate operation, mechanism box handle on-site, locking and closing of low air pressure, device lock, device alarm, and signals of closed position among the associated signals of RTU communication interruption; For the knife switch, the following signals are displayed: KK handle in place, communication interruption of the measurement and control device, remote five-protection unlocking of the KK handle, control circuit disconnection, motor power circuit breaker tripping, motor power failure, control power circuit breaker tripping, control power failure, energy storage power circuit breaker tripping, device put into maintenance, maintenance hard pressure plate put into operation, knife switch mechanism handle in place, mechanism box handle in place, device locked, device alarm, RTU communication interruption, and the signals are in the closed position among the associated signals; For on-load voltage regulation and shifting, the signal is in the closed position among the associated signals of the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, voltage regulation lock, on-load voltage regulation local device lock, device alarm, and RTU communication interruption; For the pressure plate, the signal showing the closed position among the associated signals of the measurement and control device communication interruption, device maintenance, maintenance hard pressure plate input, device lockout, device alarm, RTU communication interruption, and remote soft pressure plate input and output; Analyze whether the same plant station has Class I alarm signals and position change signals during remote control execution, and output abnormal signals as analysis results to remind on-site inspections; Analyze whether the remote control position change signal is sent for more than 40 seconds, or whether there is an abnormality in the position change signal. The double position signal is sent for double position error, and the related equipment sends the open and closed positions at the same time. Output the existing abnormal situation as the analysis result; There is a missed alarm, the switch control fails, but the spring has no energy storage signal and has experienced the process from closing to opening, and the position change signal is missing. This situation is output as the analysis result; There are missed alarms and missing position change alarms. Combined with the change of flow data, the analysis results output includes: The line interval switch control of the line under load operation failed, but the original power and current of the line had suddenly changed to data close to 0; The bay is the single power supply side of the busbar. The bay switch control fails, but the voltage of the corresponding busbar changes from the rated value to a value close to 0. The bay is the single power supply side of the busbar. The bay switch control execution fails, but the corresponding busbar voltage changes from a data close to 0 to greater than 0.65Un. When the line bay switch under load is closed, the remote control fails, but the original power and current of the line have suddenly changed from data close to 0 to greater than zero drift value; You can check the execution status of the last remote control and the operation record of the last successful remote control.

7. The SCADA system control function analysis and evaluation method as claimed in claim 6, characterized in that: The statistical display of remote control events and analysis results and marking different types of problems include statistical display of remote control events and analysis results, marking different types of problems, and forming a regional power grid control function analysis report; The analysis and evaluation results include: Statistics are collected on the number of successful remote control attempts within a specified time period; the number of successful remote control attempts with exceptions; and the number of failed attempts.

8. A system using the SCADA system control function analysis and evaluation method according to any one of claims 1 to 7, characterized in that: It includes rule base construction module, remote control failure analysis module, remote control event briefing generation module, and remote control event result analysis and statistics module; The rule base building module is used to analyze the cause of remote control failure and build a rule base; The remote control failure analysis module is used to study the changes in power flow data, alarm logic and timing, and related signal status during the remote control process, and analyze the causes of remote control failure; The remote control event briefing forming module is used to analyze the remote control event according to the rule base and give a briefing; The remote control event result analysis and statistics module is used to perform statistics display on remote control events and analysis results.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the SCADA system control function analysis and evaluation method described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the SCADA system control function analysis and evaluation method according to any one of claims 1 to 7 are implemented.

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