CN118074327A - Intelligent substation relay protection operation and maintenance system - Google Patents
Intelligent substation relay protection operation and maintenance system Download PDFInfo
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Abstract
The invention discloses a relay protection operation and maintenance system of an intelligent substation. In the invention, each monitoring module arranged in the secondary circuit monitoring module improves the monitoring efficiency, provides guarantee for the stable operation of the whole power grid, further provides basis and direction for the construction and development of electric power industry in China and injection of strong thrust, and accelerates the intelligent process. The SV/GOOSE network diagnosis, the AC loop state diagnosis and the protection action diagnosis analysis are carried out by combining the abnormal information characteristics of the process layer and the link layer, the operation state of the secondary equipment is judged by combining a loop expert database, and finally, the actual calculation example is used for verification, so that the system can effectively diagnose the operation disorder of the secondary loop in time, and can effectively overhaul the problem of the intelligent substation, thereby improving the overall overhaul precision and ensuring the normal operation of the intelligent substation.
Description
Technical Field
The invention belongs to the technical field of operation and maintenance of transformer substations, and particularly relates to a relay protection operation and maintenance system of an intelligent transformer substation.
Background
Along with the rapid recovery of production in various industries at present, the power demand in actual life and production is also continuously increasing, and the problem that power failure is very easy to occur in normal production process of many areas or industrial workshops is mainly caused by the fact that relay protection devices in transformer substations are disconnected. Commonly used substations are classified into source substations and passive substations. There are a large number of relay protectors and contactors inside the substation, and these devices are very prone to short circuits and trip during long-term use. In order to ensure that relay protection devices inside a transformer substation can timely process when faults occur, the relay protection devices of the transformer substation need to be checked regularly. The traditional transformer substation relay protection device has only two working states, one is normal, and the other is abnormal. In the actual monitoring process, the operation condition of the relay needs to be observed, and the display parameters of the relay are recorded and recorded in a report.
However, the traditional manual monitoring cannot achieve continuous monitoring of data and identification of key information, and cannot conduct intelligent arrangement on relay protection information, so that convenience of operation and maintenance is not high enough.
Disclosure of Invention
The invention aims at: in order to solve the problems, the relay protection operation and maintenance system of the intelligent substation is provided.
The technical scheme adopted by the invention is as follows: the utility model provides an intelligent substation relay protection fortune dimension system, includes power supply module, information acquisition module, wireless communication module, processor module, data processing module, secondary circuit monitoring module, equipment state monitoring module, maintenance auxiliary decision module, physical link state monitoring module, logic link state monitoring module and alternating current loop state analysis module, the output of power supply module is connected with the input of information acquisition module, the output of information acquisition module is connected with the input of wireless communication module, the output of wireless communication module is connected with the input of processor module, the output of processor module is connected with the input of data processing module, the output of data processing module is connected with the input of secondary circuit monitoring module and equipment state monitoring module, the output of secondary circuit monitoring module and equipment state monitoring module is connected with the input of maintenance auxiliary decision module
In a preferred embodiment, a physical link state monitoring module, a logical link state monitoring module and an alternating current loop state analysis module are arranged in the secondary loop monitoring module, and the integral output ends of the physical link state monitoring module, the logical link state monitoring module and the alternating current loop state analysis module are connected with the input end of the secondary loop monitoring module.
In a preferred embodiment, the information acquisition module acquires operation information of the intelligent substation equipment, the intelligent substation equipment needs to acquire signal data of a secondary circuit, the signal data comprise voltage, current and power parameters, and when the digital secondary circuit of the intelligent substation is abnormal, fault information can be rapidly diagnosed and collected and then transmitted to the remote management host; the other part is that the remote management host acquires system message information aiming at the station control layer network, and simultaneously acquires all the digital secondary loop information of the intelligent substation in the station, so that the process layer, the spacing layer and the abnormal information of the station control layer of the digital secondary loop of the intelligent substation can be effectively comprehensively diagnosed, and the information can be displayed on the interface of the remote management host in real time.
In a preferred embodiment, the wireless communication module is connected to the broadband network in a wireless mode, so that the investment cost of enterprises can be reduced. The relay protection intelligent operation and maintenance system can realize private network application by deploying VPN special equipment on the network and accessing different types of equipment (such as computers, mobile phones and the like) into the VPN special equipment, thereby ensuring the safety and confidentiality of data transmission; the processor module intelligently monitors the flow of the relay protection secondary loop through circuit related data information which is acquired by a circuit detection sensor in the PLC detection system and comprises the change conditions of current, voltage, resistance and direct current and alternating current.
In a preferred embodiment, the data processing module performs filtering processing on the data, and the data processing module is used for removing noise and interference in the signal, such as high-frequency noise, low-frequency noise and direct current components, so as to improve the quality and accuracy of the signal; the data processing module is used to remove unwanted frequency components from the signal so that the signal can be better analyzed and interpreted; the data processing module establishes a corresponding algorithm formula for the data processing module to analyze, wherein the algorithm formula is as follows:
y[n]＝\sum_{i＝0}^{M-1}b_i x[n-i]-\sum_{j＝1}^{N-1}
a_j y[n-j]，
wherein: y n is the output signal; x n is the input signal; b_i and a_j are the forward coefficient and feedback coefficient of the digital filter, respectively; m and N are the number of forward and feedback coefficients, respectively.
In a preferred embodiment, the physical link state monitoring module is used for monitoring and evaluating all communication link conditions of the substation communication system. The operation and maintenance system establishes a port communication connection relation between ports of each device according to alarm signals sent by the intelligent terminal and the switch, and the operation and maintenance system comprises an intelligent terminal IL101, a protection device PL101, a measurement and control device CL101 and a GOOSE communication model between the switches.
In a preferred embodiment, the logic link state monitoring module effectively ensures the correctness and validity of network communication content at a process layer, and the intelligent substation process layer realizes online analysis and monitoring of network messages. Network communication availability refers to determining whether an actual operating communication technology meets technical specifications and set installation requirements. Most importantly, the normal operation of the relay protection device can be affected. Correctness refers to a positive check of the format and content of the data communication message. If these requirements are not met, various problems such as signal loss, acquisition errors, false alarms and the like occur in actual operation. Whether the message format design accords with the standard, whether the message is matched or not, and authentication mainly relates to whether certain counters in the message work normally or not, so that the accuracy of network communication content and the reliability of information are realized.
In a preferred embodiment, the ac loop state analysis module may effectively combine the relay protection device and the message analysis device, compare and analyze the two devices, and then perform comprehensive judgment when performing ac quantity signal measurement of the secondary device; the data acquisition of the intelligent substation is double-loop AC/DC sampling, the information difference of the two sets of devices is compared, and if the difference is within a rated range, the monitored secondary loop is judged to be normal; if the difference exceeds the rated range and the relay protection device does not send out an alarm signal, judging that the loop where the message analysis device is located is abnormal; if the difference exceeds the rated range and the relay protection device sends out an alarm signal, the loops where the relay protection device and the relay protection device are located are abnormal.
In a preferred embodiment, the device status monitoring module monitors the position signal in the ac loop to determine the current signal status. In order to ensure the full play of the technical utility, the double-loop protection is required to be used for carrying out diagnosis and monitoring work, and the relevant information such as the actual output time and the operation state of the protection device is analyzed. It is worth noting that the output time is strictly controlled by combining GOSSE switch conditions, so that the quality of the detection result is ensured. In addition, if the two-stage loop is provided with a single reset protection device, the operation condition of each module can be monitored based on the informationized mechanical equipment, related information is compared and analyzed on the basis, the actual operation state of the switching value is clear, the accuracy of the action is judged by comparing the change of the analog value, the accuracy is improved, and the working quality is improved.
In a preferred embodiment, the overhaul auxiliary decision module relay protection intelligent operation and maintenance system fault diagnosis module comprises the following modules: (1) a fault diagnosis expert system. The module realizes fault diagnosis through a neural network algorithm, evaluates the fault state and the fault influence of the relay protection equipment, and provides decision support for subsequent fault treatment of the relay protection equipment; and (2) evaluating the running state of the relay protection equipment. The module utilizes an expert system algorithm to evaluate states such as running stability, safety and the like of relay protection equipment; the maintenance auxiliary decision module auxiliary decision flow is as follows: (1) And uploading the equipment fault operation data to an information acquisition platform by the relay protection intelligent operation and maintenance system, and transmitting the data to a data analysis area, namely a real-time data area. (2) Judging whether the relay protection equipment fault maintenance requires an auxiliary decision, if so, judging the current fault type, fault reason, fault influence range and the like according to the historical fault information of the relay protection equipment by the system, and checking a similar fault processing method in a historical database. (3) And combining the fault information of the relay protection system with the historical fault information to generate a maintenance auxiliary decision of the relay protection equipment, and feeding back the maintenance auxiliary decision to a manager through a touch screen. And a manager can overhaul the relay protection according to the relay protection equipment auxiliary decision information. After the fault processing is completed, the manager needs to input the processing result and the process into the system terminal and generate a fault processing log so as to provide a reference for the subsequent fault processing work.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. In the invention, each monitoring module arranged in the secondary circuit monitoring module improves the monitoring efficiency, provides guarantee for the stable operation of the whole power grid, further provides basis and direction for the injection of strong thrust for the construction and development of electric power industry in China, and accelerates the intelligent process. The SV/GOOSE network diagnosis, the AC loop state diagnosis and the protection action diagnosis analysis are carried out by combining the abnormal information characteristics of the process layer and the link layer, the operation state of the secondary equipment is judged by combining a loop expert database, and finally, the actual calculation example is used for verification, so that the system can effectively diagnose the operation disorder of the secondary loop in time, and can effectively overhaul the problem of the intelligent substation, thereby improving the overall overhaul precision and ensuring the normal operation of the intelligent substation.
2. In the invention, each information acquisition module in the information acquisition module needs to acquire signal data of a secondary loop, including parameters such as voltage, current, power and the like; these data typically need to be pre-processed, such as by filtering, normalization, etc., to ensure the quality and accuracy of the data. Then, it is classified and identified. Therefore, the method has high degree of automation in the process of evaluation. Meanwhile, a relay protection intelligent operation and maintenance system based on a wireless virtual private network is constructed, real-time monitoring of relay protection equipment and fault auxiliary decision making are realized, and accordingly relay protection operation maintenance quality and efficiency of the power system are improved. The intelligent operation and maintenance system of the relay protection equipment can conduct intelligent arrangement, sharing, collection and interaction on relay protection information, standardized, paperless and mobile management of field equipment is achieved, reliability, high efficiency and convenience of field operation and maintenance work are improved, and operation safety of a power grid is guaranteed.
Drawings
FIG. 1 is an overall system block diagram of the present invention;
FIG. 2 is a block diagram of a secondary loop monitoring module system according to the present invention.
The marks in the figure: the system comprises a 1-power supply module, a 2-information acquisition module, a 3-wireless communication module, a 4-processor module, a 5-data processing module, a 6-secondary loop monitoring module, a 7-equipment state monitoring module, an 8-maintenance auxiliary decision making module, a 9-physical link state monitoring module, a 10-logic link state monitoring module and an 11-alternating current loop state analysis module.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
With reference to figures 1-2 of the drawings,
The utility model provides an intelligent substation relay protection operation and maintenance system, including power supply module 1, information acquisition module 2, wireless communication module 3, processor module 4, data processing module 5, secondary circuit monitoring module 6, equipment state monitoring module 7, maintenance auxiliary decision module 8, physical link state monitoring module 9, logic link state monitoring module 10 and exchange return circuit state analysis module 11, the output of power supply module 1 is connected with the input of information acquisition module 2, the output of information acquisition module 2 is connected with the input of wireless communication module 3, the output of wireless communication module 3 is connected with the input of processor module 4, the output of processor module 4 is connected with the input of data processing module 5, the output of data processing module 5 is connected with the input of secondary circuit monitoring module 6 and equipment state monitoring module 7, the output of secondary circuit monitoring module 6 and equipment state monitoring module 7 is connected with the input of maintenance auxiliary decision module 8.
The secondary loop monitoring module 6 is internally provided with a physical link state monitoring module 9, a logical link state monitoring module 10 and an alternating current loop state analysis module 11, and the integral output ends of the physical link state monitoring module 9, the logical link state monitoring module 10 and the alternating current loop state analysis module 11 are connected with the input end of the secondary loop monitoring module 6.
The information acquisition module 2 acquires operation information of intelligent substation equipment, the intelligent substation equipment needs to acquire signal data of a secondary circuit, including voltage, current and power parameters, and when the digital secondary circuit of the intelligent substation is abnormal, fault information can be rapidly diagnosed and collected and then transmitted to a remote management host; the other part is that the remote management host acquires system message information aiming at the station control layer network, and simultaneously acquires all the digital secondary loop information of the intelligent substation in the station, so that the process layer, the spacing layer and the abnormal information of the station control layer of the digital secondary loop of the intelligent substation can be effectively comprehensively diagnosed, and the information can be displayed on the interface of the remote management host in real time.
The wireless communication module 3 is accessed to the broadband network in a wireless mode, so that the investment cost of enterprises can be reduced. The relay protection intelligent operation and maintenance system can realize private network application by deploying VPN special equipment on the network and accessing different types of equipment (such as computers, mobile phones and the like) into the VPN special equipment, thereby ensuring the safety and confidentiality of data transmission; the processor module 4 intelligently monitors the flow of the relay protection secondary loop through circuit related data information which is acquired by a circuit detection sensor in the PLC detection system and comprises the change conditions of current, voltage, resistance and direct current and alternating current
The data processing module 5 performs filtering processing on the data, and the data processing module 5 is used for removing noise and interference in the signal, such as high-frequency noise, low-frequency noise and direct current components, so that the quality and accuracy of the signal are improved; the data processing module 5 is used to remove unwanted frequency components from the signal so that the signal can be better analyzed and interpreted; the data processing module 5 builds a corresponding algorithm formula for the analysis, wherein the algorithm formula is as follows:
y[n]＝\sum_{i＝0}^{M-1}b_i x[n-i]-\sum_{j＝1}^{N-1}
a_j y[n-j]，
wherein: y n is the output signal; x n is the input signal; b_i and a_j are the forward coefficient and feedback coefficient of the digital filter, respectively; m and N are the number of forward and feedback coefficients, respectively.
The physical link state monitoring module 9 is used for monitoring and evaluating all communication link conditions of the substation communication system. The operation and maintenance system establishes a port communication connection relation between ports of each device according to alarm signals sent by the intelligent terminal and the switch, and the operation and maintenance system comprises the intelligent terminal IL101, the protection device PL101, the measurement and control device CL101 and a GOOSE communication model between the switches.
7. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the logic link state monitoring module 10 effectively ensures the correctness and the validity of network communication content in a process layer, and the intelligent substation process layer realizes the online analysis and the monitoring of network messages. Network communication availability refers to determining whether an actual operating communication technology meets technical specifications and set installation requirements. Most importantly, the normal operation of the relay protection device can be affected. Correctness refers to a positive check of the format and content of the data communication message. If these requirements are not met, various problems such as signal loss, acquisition errors, false alarms and the like occur in actual operation. Whether the message format design accords with the standard, whether the message is matched or not, and authentication mainly relates to whether certain counters in the message work normally or not, so that the accuracy of network communication content and the reliability of information are realized.
The alternating current loop state analysis module 11 can effectively combine the relay protection device and the message analysis device when the alternating current quantity signal of the secondary equipment is measured, and comprehensively judge after comparing and analyzing the relay protection device and the message analysis device; the data acquisition of the intelligent substation is double-loop AC/DC sampling, the information difference of the two sets of devices is compared, and if the difference is within a rated range, the monitored secondary loop is judged to be normal; if the difference exceeds the rated range and the relay protection device does not send out an alarm signal, judging that the loop where the message analysis device is located is abnormal; if the difference exceeds the rated range and the relay protection device sends out an alarm signal, the loops where the relay protection device and the relay protection device are located are abnormal.
The device state monitoring module 7 monitors the position signal in the ac loop to determine the current signal state. In order to ensure the full play of the technical utility, the double-loop protection is required to be used for carrying out diagnosis and monitoring work, and the relevant information such as the actual output time and the operation state of the protection device is analyzed. It is worth noting that the output time is strictly controlled by combining GOSSE switch conditions, so that the quality of the detection result is ensured. In addition, if the two-stage loop is provided with a single reset protection device, the operation condition of each module can be monitored based on the informationized mechanical equipment, related information is compared and analyzed on the basis, the actual operation state of the switching value is clear, the accuracy of the action is judged by comparing the change of the analog value, the accuracy is improved, and the working quality is improved.
The overhaul auxiliary decision module 8 relay protection intelligent operation and maintenance system fault diagnosis module comprises the following modules: (1) a fault diagnosis expert system. The module realizes fault diagnosis through a neural network algorithm, evaluates the fault state and the fault influence of the relay protection equipment, and provides decision support for subsequent fault treatment of the relay protection equipment; and (2) evaluating the running state of the relay protection equipment. The module utilizes an expert system algorithm to evaluate states such as running stability, safety and the like of relay protection equipment; the maintenance auxiliary decision module 8 assists the decision flow as follows: (1) And uploading the equipment fault operation data to an information acquisition platform by the relay protection intelligent operation and maintenance system, and transmitting the data to a data analysis area, namely a real-time data area. (2) Judging whether the relay protection equipment fault maintenance requires an auxiliary decision, if so, judging the current fault type, fault reason, fault influence range and the like according to the historical fault information of the relay protection equipment by the system, and checking a similar fault processing method in a historical database. (3) And combining the fault information of the relay protection system with the historical fault information to generate a maintenance auxiliary decision of the relay protection equipment, and feeding back the maintenance auxiliary decision to a manager through a touch screen. And a manager can overhaul the relay protection according to the relay protection equipment auxiliary decision information. After the fault processing is completed, the manager needs to input the processing result and the process into the system terminal and generate a fault processing log so as to provide a reference for the subsequent fault processing work.
In the invention, each monitoring module arranged in the secondary circuit monitoring module 6 improves the monitoring efficiency, provides guarantee for the stable operation of the whole power grid, further provides basis and direction for the construction and development of electric power industry in China and injection of strong thrust, and accelerates the intelligent process. The SV/GOOSE network diagnosis, the AC loop state diagnosis and the protection action diagnosis analysis are carried out by combining the abnormal information characteristics of the process layer and the link layer, the operation state of the secondary equipment is judged by combining a loop expert database, and finally, the actual calculation example is used for verification, so that the system can effectively diagnose the operation disorder of the secondary loop in time, and can effectively overhaul the problem of the intelligent substation, thereby improving the overall overhaul precision and ensuring the normal operation of the intelligent substation.
In the invention, each information acquisition module in the information acquisition module 2 needs to acquire signal data of a secondary loop, including parameters such as voltage, current, power and the like; these data typically need to be pre-processed, such as by filtering, normalization, etc., to ensure the quality and accuracy of the data. Then, it is classified and identified. Therefore, the method has high degree of automation in the process of evaluation. Meanwhile, a relay protection intelligent operation and maintenance system based on a wireless virtual private network is constructed, real-time monitoring of relay protection equipment and fault auxiliary decision making are realized, and accordingly relay protection operation maintenance quality and efficiency of the power system are improved. The intelligent operation and maintenance system of the relay protection equipment can conduct intelligent arrangement, sharing, collection and interaction on relay protection information, standardized, paperless and mobile management of field equipment is achieved, reliability, high efficiency and convenience of field operation and maintenance work are improved, and operation safety of a power grid is guaranteed.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an intelligent substation relay protection fortune dimension system, includes power supply module (1), information acquisition module (2), wireless communication module (3), processor module (4), data processing module (5), secondary circuit monitoring module (6), equipment state monitoring module (7), maintenance auxiliary decision module (8), physical link state monitoring module (9), logical link state monitoring module (10) and exchange return circuit state analysis module (11), its characterized in that: the output of power supply module (1) is connected with the input of information acquisition module (2), the output of information acquisition module (2) is connected with the input of wireless communication module (3), the output of wireless communication module (3) is connected with the input of processor module (4), the output of processor module (4) is connected with the input of data processing module (5), the output of data processing module (5) is connected with the input of secondary circuit monitoring module (6) and equipment state monitoring module (7), the output of secondary circuit monitoring module (6) and equipment state monitoring module (7) is connected with the input of maintenance auxiliary decision module (8).
2. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the secondary loop monitoring system is characterized in that a physical link state monitoring module (9), a logical link state monitoring module (10) and an alternating current loop state analysis module (11) are arranged in the secondary loop monitoring module (6), and the integral output ends of the physical link state monitoring module (9), the logical link state monitoring module (10) and the alternating current loop state analysis module (11) are connected with the input end of the secondary loop monitoring module (6).
3. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the information acquisition module (2) acquires operation information of intelligent substation equipment, the intelligent substation equipment needs to acquire signal data of a secondary circuit, the signal data comprise voltage, current and power parameters, and when the digital secondary circuit of the intelligent substation is abnormal, fault information can be rapidly diagnosed and collected and then transmitted to a remote management host; the other part is that the remote management host acquires system message information aiming at the station control layer network, and simultaneously acquires all the digital secondary loop information of the intelligent substation in the station, so that the process layer, the spacing layer and the abnormal information of the digital secondary loop of the intelligent substation can be comprehensively diagnosed, and the information can be displayed on the interface of the remote management host in real time.
4. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the wireless communication module (3) is connected to the broadband network in a wireless mode, so that the investment cost of enterprises can be reduced; the relay protection intelligent operation and maintenance system can realize private network application by deploying VPN special equipment on the network and accessing different types of equipment into the VPN special equipment, thereby ensuring the safety and confidentiality of data transmission; the processor module (4) intelligently monitors the flow of the relay protection secondary loop through circuit related data information which is acquired by a circuit detection sensor in the PLC detection system and comprises the change conditions of current, voltage, resistance and direct current alternating current.
5. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the data processing module (5) is used for filtering the data, and the data processing module (5) is used for removing noise and interference in the signals, such as high-frequency noise, low-frequency noise and direct-current components, so that the quality and accuracy of the signals are improved; the data processing module (5) is used to remove unwanted frequency components from the signal so that the signal can be better analyzed and interpreted; the data processing module (5) establishes a corresponding algorithm formula for the data processing module to analyze, wherein the algorithm formula is as follows:
y[n]＝\sum_{i＝0}^{M-1}b_i x[n-i]-\sum_{j＝l}^{N-1}
a_jy[n-j]，
wherein: y n is the output signal; x n is the input signal; b_i and a_j are the forward coefficient and feedback coefficient of the digital filter, respectively; m and N are the number of forward and feedback coefficients, respectively.
6. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the physical link state monitoring module (9) is used for monitoring and evaluating all communication link conditions of the substation communication system; the operation and maintenance system establishes a port communication connection relation between ports of each device according to alarm signals sent by the intelligent terminal and the switch, and the operation and maintenance system comprises an intelligent terminal IL101, a protection device PL101, a measurement and control device CL101 and a G00SE communication model between the switches, when the physical link state monitoring module (9) is interrupted from GOOSE generated by the port 1-A, the operation and maintenance system can analyze and evaluate the operation state signals and the state value of each port step by step according to the following processes, so that a user can diagnose and position a specific fault point.
7. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the logic link state monitoring module (10) effectively ensures the correctness and the validity of network communication content in a process layer, and the intelligent substation process layer realizes the online analysis and the monitoring of network messages; network communication availability refers to determining whether an actual operating communication technology meets technical specifications and set installation requirements.
8. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the alternating current loop state analysis module (11) can effectively combine the relay protection device and the message analysis device when the alternating current quantity signal of the secondary equipment is measured, and comprehensively judge after comparing and analyzing the relay protection device and the message analysis device; the data acquisition of the intelligent substation is double-loop AC/DC sampling, the information difference of the two sets of devices is compared, and if the difference is within a rated range, the monitored secondary loop is judged to be normal; if the difference exceeds the rated range and the relay protection device does not send out an alarm signal, judging that the loop where the message analysis device is located is abnormal; if the difference exceeds the rated range and the relay protection device sends out an alarm signal, the loops where the relay protection device and the relay protection device are located are abnormal.
9. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the equipment state monitoring module (7) monitors position signals in the alternating current loop to judge the current signal state; to ensure full play of the technical utility, it is necessary to perform diagnosis and monitoring work by using dual-loop protection, and analyze the actual output time and the operation state related information of the protection device.
10. The intelligent substation relay protection operation and maintenance system according to claim 1, wherein: the overhaul auxiliary decision module (8) relay protection intelligent operation and maintenance system fault diagnosis module comprises the following modules: (1) a fault diagnosis expert system; the module realizes fault diagnosis through a neural network algorithm, evaluates the fault state and the fault influence of the relay protection equipment, and provides decision support for subsequent fault treatment of the relay protection equipment; (2) evaluating the running state of relay protection equipment; the module utilizes an expert system algorithm to evaluate the running stability and the safety state of the relay protection equipment; the maintenance auxiliary decision-making module (8) assists the decision-making flow as follows: (1) The relay protection intelligent operation and maintenance system uploads equipment fault operation data to the information acquisition platform and transmits the data to a data analysis area, namely a real-time data area; (2) Judging whether the relay protection equipment fault maintenance requires an auxiliary decision, if so, judging the current fault type, fault reason and fault influence range according to the historical fault information of the relay equipment by the system, and checking a similar fault processing method in a historical database; (3) Combining the fault information of the relay protection system with the historical fault information to generate a maintenance auxiliary decision of the relay protection equipment, and feeding back the maintenance auxiliary decision to a manager through a touch screen; the manager can overhaul the relay protection according to the auxiliary decision information of the relay protection equipment; after the fault processing is completed, the manager needs to input the processing result and the process into the system terminal and generate a fault processing log.
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