A digital operation and maintenance method and system for secondary circuits of relay protection

Abstract

The present invention discloses a digital operation and maintenance system and method for secondary circuits of relay protection, which relates to the technical field of relay protection in power systems and includes: sending a heartbeat signal from a management terminal to a local terminal and an edge terminal; collecting feedback signals and judging the on / off state of the device based on the feedback signals; turning on a first intelligent switch and a second intelligent switch, obtaining the light-emitting states of a first LED and a second LED, judging whether there are functional abnormalities or faults, and taking corresponding measures accordingly. By implementing real-time heartbeat signal communication and an intelligent LED feedback system among the management terminal, the local terminal, and the edge terminal, the present invention solves the problems of slow fault response and inaccurate fault location in the prior art for secondary circuits. By monitoring the on / off state of the device in real time and analyzing the feedback signals, the system is allowed to quickly perform fault diagnosis and automatically switch the control path to maintain system operation when an abnormality is detected, or indicate the specific fault location for quick repair.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection in power systems, and specifically to a digital operation and maintenance method and system for secondary circuits of relay protection. Background Art

[0002] The secondary circuit of relay protection is a circuit system in a power system used for the control, measurement, and signal transmission of relay protection equipment. It includes cables, terminals, etc. that connect protection relays, measuring instruments, circuit breakers, and related auxiliary equipment, and its function is to monitor and protect the stable operation of the power system.

[0003] Digitalizing the secondary circuit can improve the accuracy and transmission efficiency of data, reduce errors caused by attenuation and interference of traditional analog signals. Secondly, through real-time data analysis and remote monitoring functions, potential problems in the power system can be detected and solved in a timely manner, improving the response speed and reliability of the system. In addition, digitalization also helps to simplify the maintenance process and optimize resource allocation, significantly enhancing the overall efficiency and economic benefits of the power system.

[0004] The existing operation and maintenance of secondary circuits of relay protection mainly rely on manual labor, with low efficiency and being easily affected by manual technical differences. When a circuit anomaly occurs, it is impossible to quickly locate the abnormal node. In actual operation, due to the complex and cumbersome connection relationships of equipment, cables, and terminals, traditional management methods are difficult to effectively meet the increasing requirements for complexity, accuracy, and speed in secondary circuits, making the fault diagnosis and maintenance process of secondary circuits more difficult and time-consuming. Summary of the Invention

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the technical problem solved by the present invention is: aiming at the operation and maintenance of existing secondary circuits relying on manual labor, the secondary circuits being complex, with low detection efficiency, poor accuracy, long time consumption, and being easily affected by manual subjective factors when anomalies occur, how to solve the problem of not being able to quickly locate abnormal circuit nodes.

[0007] To solve the above technical problem, the present invention provides the following technical solution: A digital operation and maintenance method for secondary circuits of relay protection, which includes the following steps,

[0008] A local terminal, an edge terminal, and a management terminal;

[0009] The local terminal is connected to the management terminal through the edge terminal;

[0010] Each component to be monitored in the secondary circuit of the local terminal is provided with a passive light-emitting tag. Each component to be monitored is connected to the first LED of the arranged passive light-emitting tag through a first intelligent switch, and each component to be monitored is connected to the second LED of the arranged passive light-emitting tag through a second intelligent switch;

[0011] When La = L1, control the first LED to switch to yellow through the first intelligent switch. When the first LED lights up successfully, adjust the RFID frequency and feedback it to the edge terminal. Set Lb = L5 and control the second LED to switch to green through the second intelligent switch and the third intelligent switch. When the first LED lights up fails, the RFID frequency remains unchanged and is feedback to the edge terminal. Set Lb = L4 and control the second LED to switch to red through the second intelligent switch and the third intelligent switch;

[0012] When La = L2, control the first LED to switch to red through the first intelligent switch. When the first LED lights up successfully, adjust the RFID frequency and feedback it to the edge terminal. Set Lb = L5 and control the second LED to switch to green through the second intelligent switch and the third intelligent switch. When the first LED lights up fails, the RFID frequency remains unchanged and is feedback to the edge terminal. Set Lb = L4 and control the second LED to switch to red through the second intelligent switch and the third intelligent switch;

[0013] When La = L3, control the first LED to switch to green through the first intelligent switch. When the first LED lights up successfully, adjust the RFID frequency and feedback it to the edge terminal. Set Lb = L5 and control the second LED to switch to green through the second intelligent switch and the third intelligent switch. When the first LED lights up fails, the RFID frequency remains unchanged and is feedback to the edge terminal. Set Lb = L4 and control the second LED to switch to red through the second intelligent switch and the third intelligent switch;

[0014] When La = L1, the management terminal continuously sends signals to the edge terminal. The edge terminal continuously controls the first intelligent switch and the first LED lights up. If the management terminal does not send signals, the first LED goes out;

[0015] When La = L2, the management terminal sends a signal to the edge terminal once. The edge terminal continuously controls the first intelligent switch and the first LED lights up. After the management terminal sends a signal to the edge terminal for the second time, the edge terminal stops controlling the first intelligent switch and the first LED goes out;

[0016] When La = L3, the management terminal sends a signal to the edge terminal once. The edge terminal controls the first intelligent switch once, and the first LED lights up once and then automatically goes out.

[0017] The emission colors of the first LED and the second LED are different;

[0018] The second LED is connected to the backup power supply through a third intelligent switch;

[0019] The passive luminous tag further includes an RFID and a QR code, and the QR code is connected to the database of the edge terminal;

[0020] The database is connected to the multi-modal communication module of the edge terminal, and the database includes secondary circuit information;

[0021] The first intelligent switch, the second intelligent switch, and the third intelligent switch are all connected to the multi-modal communication module;

[0022] The management terminal is connected to the multi-modal communication module through a heartbeat mechanism to obtain the on / off status between the local terminal and the edge terminal;

[0023] In the case of abnormal on / off status, the management terminal sends control instructions through the multi-modal communication module to control the on / off of the first intelligent switch, the second intelligent switch, and the third intelligent switch, and locates the abnormal component to be monitored based on the different luminous colors of the first LED and the second LED.

[0024] As a preferred solution of a digital operation and maintenance system for secondary circuits of relay protection according to the present invention, wherein: La and Lb are respectively the abnormal state of the monitored component and the abnormal state of the communication between the tag edge device, which are monitored and identified by the management terminal and sent to the edge terminal to control the first intelligent switch and the second intelligent switch;

[0025] L1, L2, and L3 are respectively three states of abnormal data of the monitored component, abnormal channel of the monitored component, and normal of the monitored component, corresponding to yellow, red, and green of the first LED;

[0026] L4 and L5 are respectively abnormal lighting of the first LED of the passive luminous tag and normal lighting of the first LED, corresponding to red and green of the second LED.

[0027] As a preferred solution of a digital operation and maintenance system for secondary circuits of relay protection according to the present invention, wherein: the components to be monitored include secondary circuit equipment, secondary circuit terminals, and secondary circuit cables;

[0028] Each component to be monitored corresponds to a passive luminous tag one by one.

[0029] As a preferred solution of a digital operation and maintenance system for secondary circuits of relay protection according to the present invention, wherein: the secondary circuit information includes secondary circuit drawings, secondary circuit equipment schematic diagrams, secondary circuit technical specifications, and current node marking drawings.

[0030] As a preferred solution of a digital operation and maintenance system for secondary circuits of relay protection according to the present invention, wherein: the first intelligent switch and the first LED are connected in parallel with the component to be monitored at the arrangement position to form a first circuit;

[0031] The second intelligent switch and the second LED are both connected in parallel with the component to be monitored at the arrangement position to form a second circuit;

[0032] The third intelligent switch and the second LED are both connected in parallel with the standby power supply to form a third circuit.

[0033] As a preferred solution of a digital operation and maintenance system for secondary circuits of relay protection according to the present invention, wherein: the abnormal on-off state includes a first abnormal state and a second abnormal state;

[0034] The first abnormal state is that the first intelligent switch, the second intelligent switch, and the third intelligent switch fail to return confirmation information according to the heartbeat signal sent by the heartbeat mechanism;

[0035] The second abnormal state is that the confirmation information of the first intelligent switch, the second intelligent switch, and the third intelligent switch does not match the control instruction;

[0036] The database sets an update mechanism to update the secondary circuit information in the database based on the update instruction of the management terminal.

[0037] As a preferred solution of a digital operation and maintenance system for secondary circuits of relay protection according to the present invention, wherein: the secondary circuit equipment includes relays, breaker control units, measuring instruments, and signal converters;

[0038] The secondary circuit terminals include terminal boards and connection terminals;

[0039] The secondary circuit cables include control cables, signal cables, communication cables, and power supply cables.

[0040] As a preferred solution of a digital operation and maintenance system for secondary circuits of relay protection according to the present invention, wherein: the secondary circuit drawings, the schematic diagrams of secondary circuit equipment, the technical specifications of secondary circuits, and the current node marking drawings are all electronic drawings.

[0041] Another object of the present invention is to provide a digital operation and maintenance method for secondary circuits of relay protection, which can quickly locate and respond to abnormal states in the power system through real-time monitoring and automatic diagnosis functions, and solves the problems of slow response and difficult location of power system faults in the prior art.

[0042] To solve the above technical problems, the present invention provides the following technical solution: a digital operation and maintenance method for secondary circuits of relay protection, including: sending a heartbeat signal from the management terminal to the local terminal and the edge terminal;

[0043] Collect feedback signals and determine the on / off state of the device based on the feedback signals;

[0044] Turn on the first intelligent switch and the second intelligent switch, obtain the lighting states of the first LED and the second LED, determine whether there are functional abnormalities or faults, and take corresponding measures accordingly.

[0045] As a preferred solution of a digital operation and maintenance method for secondary circuits of relay protection according to the present invention, wherein: the determining the on / off state of the device based on the feedback signals includes,

[0046] When the on / off state of the device is abnormal, send a communication abnormality warning;

[0047] When the on / off state of the device is normal, turn on the first intelligent switch and the second intelligent switch, obtain the lighting states of the first LED and the second LED, and determine whether there are functional abnormalities or faults;

[0048] When the lighting states of both the first LED and the second LED are abnormal, turn off the first intelligent switch and the second intelligent switch, turn on the third intelligent switch, and determine the lighting state of the second LED;

[0049] If the lighting state of the second LED is normal, output an abnormality in the secondary circuit. Otherwise, replace the second LED, turn on the first intelligent switch and the second intelligent switch again, and determine whether there are functional abnormalities or faults;

[0050] Locate the position of the abnormal secondary circuit according to the passive lighting label where the abnormal secondary circuit is located.

[0051] Advantages of the present invention: By implementing real-time heartbeat signal communication and an intelligent LED feedback system among the management terminal, the local terminal, and the edge terminal, the present invention solves the problems of slow fault response and inaccurate fault location in the prior art for secondary circuits. By real-time monitoring the on / off state of the device and analyzing the feedback signals, the system is allowed to quickly perform fault diagnosis and automatically switch the control path to maintain system operation when an abnormality is detected, or indicate the specific fault location for quick repair. Through the integrated use of intelligent switches and passive lighting labels, the position and nature of the fault occurrence are accurately displayed and recorded, greatly improving the fault handling efficiency and system stability, ensuring the continuous operation and reliability of the power system, while reducing the maintenance cost and downtime. Description of the Drawings

[0052] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings. Among them:

[0053] Figure 1 It is a schematic structural diagram of a digital operation and maintenance system for the secondary circuit of relay protection provided by the first embodiment of the present invention;

[0054] Figure 2 It is a schematic flow diagram of a digital operation and maintenance method for the secondary circuit of relay protection provided by the second embodiment of the present invention;

[0055] Figure 3 It is a schematic diagram of the light-emitting labels installed on the field switch and the relay protection device of a digital operation and maintenance method for the secondary circuit of relay protection provided by the fourth embodiment of the present invention;

[0056] Figure 4 It is a schematic diagram of the LED flashing of the light-emitting label of a digital operation and maintenance method for the secondary circuit of relay protection provided by the fourth embodiment of the present invention. Specific Embodiments

[0057] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will provide a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0058] Embodiment 1, refer to Figure 1 This is an embodiment of the present invention, providing a digital operation and maintenance system for the secondary circuit of relay protection, including: a local terminal, an edge terminal, and a management terminal, wherein the local terminal is connected to the management terminal through the edge terminal;

[0059] Passive light-emitting labels are arranged on each component to be monitored in the secondary circuit of the local terminal. Each component to be monitored is connected to the first LED of the arranged passive light-emitting label through a first intelligent switch, and each component to be monitored is connected to the second LED of the arranged passive light-emitting label through a second intelligent switch, wherein the emission colors of the first LED and the second LED are different;

[0060] The second LED is connected to the backup power supply through a third intelligent switch;

[0061] The passive luminous tag further includes an RFID and a QR code. The QR code is connected to the database at the edge side, and the database is connected to the multi-modal communication module at the edge side. Among them, the database includes secondary circuit information;

[0062] The first intelligent switch, the second intelligent switch, and the third intelligent switch are all connected to the multi-modal communication module;

[0063] The management terminal is connected to the multi-modal communication module through a heartbeat mechanism to obtain the on / off state of the local terminal and the edge side;

[0064] In the case of an abnormal on / off state, the management terminal sends a control instruction through the multi-modal communication module to control the on / off of the first intelligent switch, the second intelligent switch, and the third intelligent switch, and locates the abnormal component to be monitored based on the different luminous colors of the first LED and the second LED.

[0065] Among them, the local terminal is responsible for directly connecting to each component to be monitored in the secondary circuit. Each component is equipped with a passive luminous tag, including an LED lamp and an RFID / QR code. The local terminal realizes real-time monitoring by collecting the data provided by these tags. The edge side acts as a bridge between the local terminal and the management terminal, responsible for processing the data from the local terminal, and at the same time storing detailed information about the secondary circuit through the database to ensure that the data is updated immediately and accessible to the management terminal. The management terminal is the control center of the system. By connecting to the multi-modal communication module at the edge side, it uses the heartbeat mechanism to monitor the state of the entire system, and sends a control instruction to adjust the intelligent switch when detecting an abnormal on / off state, realizing fault location and system maintenance. The passive luminous tag is installed on each component to be monitored, providing visual indication through the built-in first and second LEDs (different colors), and at the same time having RFID and QR code functions for verification, location, and information acquisition. The first intelligent switch, the second intelligent switch, and the third intelligent switch respectively control the power supply of the LED lamps connected to them, allowing remote control of the lamp state to indicate the operating condition or fault state of the component, and accessing the standby power supply through the third intelligent switch to switch the power-on state of the second LED to realize repeated verification of the complete circuit node of a single LED, avoiding the problem of inaccurate results caused by single verification. The database stores all important information about the secondary circuit, such as drawings, equipment schematic diagrams, etc. The multi-modal communication module processes the transmission of these data to ensure that the management terminal can receive and process the data from the edge side in real time, so that the maintenance personnel can quickly obtain the position of the abnormal circuit node in the entire circuit, improving the circuit repair speed.

[0066] It should be noted that the digital operation and maintenance system for the secondary circuit of relay protection greatly improves the operation and maintenance efficiency and reliability of the power system through a highly integrated technical architecture. The passive luminous tags in the system are equipped with two different colors of LEDs and are connected to each component of the secondary circuit through intelligent switches. Such a setting not only realizes the intuitive display of the fault state but also allows for the rapid identification and location of problem areas through remote control. In addition, by connecting the RFID and two-dimensional code technologies to the database, detailed information about each component can be obtained in real time, thus accurately tracking the specific fault causes and locations. The application of the heartbeat mechanism ensures the communication stability between various parts of the system. By real-time monitoring the connection status, it can quickly respond to any possible communication interruption or abnormal situation. The digital configuration of such a system not only reduces the dependence on manual inspections, lowers the maintenance cost, but also improves the speed and accuracy of fault diagnosis, ensuring the efficient operation and system safety of the power system.

[0067] In some embodiments, the components to be monitored include secondary circuit devices, secondary circuit terminals, and secondary circuit cables.

[0068] Among them, secondary circuit devices, secondary circuit terminals, and secondary circuit cables are the basic components of the secondary circuit.

[0069] In some embodiments, the secondary circuit information specifically includes secondary circuit drawings, schematic diagrams of secondary circuit devices, secondary circuit technical specifications, and current node marking drawings.

[0070] Among them, the secondary circuit drawings provide the layout and configuration of the entire secondary circuit, including detailed diagrams of all connections, devices, and their configuration methods, enabling maintenance personnel to quickly understand the layout of the entire power system and the interrelationships of each component, facilitating error troubleshooting and system optimization. The schematic diagrams of secondary circuit devices show the working principles and internal structures of specific devices, including circuit designs and function descriptions, helping technicians understand the specific functions and working mechanisms of each device, and contributing to rapid and accurate diagnosis and repair in case of faults. The secondary circuit technical specifications provide detailed technical specifications, operation guides, and safety information of the devices, ensuring that all operation and maintenance activities are carried out in accordance with the manufacturer's standards, reducing operation errors, and improving the safety of system operation. The current node marking drawings identify the exact positions of specific devices or circuits in the entire secondary circuit. By directly scanning the two-dimensional code to obtain the relevant information of the node to which it belongs, it allows for rapid positioning to a specific node, greatly enhancing the speed of fault finding and resolution, which is particularly important in complex networks or large facilities.

[0071] In some embodiments, the secondary circuit drawings, the schematic diagrams of secondary circuit devices, the secondary circuit technical specifications, and the current node marking drawings are all electronic drawings.

[0072] It can be understood that the form of the electronic diagram is the basis for realizing the digital processing of the secondary circuit.

[0073] In some embodiments, each component to be monitored corresponds one-to-one with the passive light-emitting tag.

[0074] It should be noted that through the one-to-one correspondence method, it is ensured that each component to be monitored can obtain accurate abnormal monitoring, and the fault rapid positioning ability of the secondary circuit during abnormalities is improved.

[0075] In some embodiments, the first intelligent switch and the first LED are both connected in parallel with the component to be monitored at the arranged position to form a first loop, the second intelligent switch and the second LED are both connected in parallel with the component to be monitored at the arranged position to form a second loop, and the third intelligent switch and the second LED are both connected in parallel with the standby power supply to form a third loop.

[0076] It should be noted that in this digital operation and maintenance system for the secondary circuit of relay protection, by connecting the first intelligent switch and the first LED in parallel to the component to be monitored, and the similar configuration of the second intelligent switch and the second LED, such a design can provide independent monitoring and control loops for each component. This configuration allows the system to more precisely control and monitor the status of each component, provides intuitive status indication through LED lights of different colors, and makes fault diagnosis and positioning faster and more accurate. In addition, the parallel configuration of the third intelligent switch with the second LED and the standby power supply performs secondary verification of the detection results, avoids the problem of the second LED being constantly on caused by single verification or circuit failure, enhances the reliability and stability of the system, and this multi-loop configuration greatly improves the flexibility and fault response ability of the system.

[0077] In some embodiments, the abnormal on-off state includes a first abnormal state and a second abnormal state;

[0078] The first abnormal state is that the first intelligent switch, the second intelligent switch, and the third intelligent switch fail to return confirmation information according to the heartbeat signal sent by the heartbeat mechanism;

[0079] The second abnormal state is that the confirmation information of the first intelligent switch, the second intelligent switch, and the third intelligent switch does not match the control instruction.

[0080] It should be noted that in this digital operation and maintenance system for secondary circuits of relay protection, defining two abnormal states enhances the system's fault monitoring and response capabilities. The first abnormal state detects the response of intelligent switches through the heartbeat mechanism to ensure the communication integrity of the system and the online status of devices. The second abnormal state monitors the execution accuracy of intelligent switches to ensure that the received control instructions are correctly executed. This dual monitoring strategy significantly improves the reliability and security of the system, enabling the system to promptly detect and respond to various potential technical problems, thereby maintaining the stable operation of the power system. Such a design not only reduces the possibility of system failures but also provides more accurate fault location and rapid fault recovery, greatly improving the maintenance efficiency and the overall performance of the system.

[0081] In some embodiments, the database is provided with an update mechanism, and the update mechanism updates the secondary circuit information in the database based on the update instruction from the management terminal.

[0082] It can be understood that setting a database with an update mechanism in the digital operation and maintenance system for secondary circuits of relay protection allows the dynamic update of the secondary circuit information in the database through the update instruction issued by the management terminal. Such a configuration ensures that all operations and monitoring are based on the latest and most accurate system data, improving the maintenance efficiency and the accuracy of system decision-making. In addition, the update mechanism also supports the adaptability and scalability of the system, enabling the system to flexibly respond to changing operation requirements and technological upgrades.

[0083] In some embodiments, the secondary circuit devices include relays, circuit breaker control units, measuring instruments, and signal converters, the secondary circuit terminals include terminal boards and connection terminals, and the secondary circuit cables include control cables, signal cables, communication cables, and power supply cables.

[0084] Embodiment 2, refer to Figure 2 This is an embodiment of the present invention, providing a method for a digital operation and maintenance system of secondary circuits of relay protection, including:

[0085] S1: Send a heartbeat signal from the management terminal to the local terminal and the edge terminal;

[0086] S2: Collect feedback signals and judge the on / off state of the device based on the feedback signals. In the case of an abnormal on / off state of the device, enter step S7; otherwise, enter step S3;

[0087] S3: Turn on the first intelligent switch and the second intelligent switch, and obtain the lighting states of the first LED and the second LED;

[0088] S4: When the lighting states of the first LED and the second LED are both abnormal, disconnect the first intelligent switch and the second intelligent switch, connect the third intelligent switch, judge the lighting state of the second LED. If the lighting state of the second LED is normal, output that the secondary circuit is abnormal; otherwise, proceed to step S5;

[0089] S5: Replace the second LED and return to step S3;

[0090] S6: Locate the position of the abnormal secondary circuit according to the passive lighting label where the abnormal secondary circuit is located;

[0091] S7: Issue a communication abnormality warning.

[0092] The present invention can efficiently monitor the communication states of various components of the digital operation and maintenance system of the secondary circuit of relay protection through the heartbeat mechanism, avoid the problem of invalid monitoring of the secondary circuit caused by abnormal communication states, effectively reduce the manual inspection cost. In addition, when the first intelligent switch and the second intelligent switch are closed, if the LED is abnormal and the secondary circuit is judged to be abnormal, the third intelligent switch of the device can perform a secondary diagnosis on the abnormal result, avoid misdiagnosis of the secondary circuit abnormality caused by LED damage, effectively reduce the false detection frequency, avoid repeated circuit cutting, increase the stability of the circuit. When it is determined that there is an abnormality in the secondary circuit, quickly locate the abnormal node according to the passive lighting label, improve the maintenance efficiency of the secondary circuit, and enhance the reliability and high sensitivity of the secondary circuit.

[0093] Embodiment 3

[0094] If the described 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 such an understanding, the technical solution of the present invention, in essence, or the part that makes a contribution to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0095] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or used in combination with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

[0096] More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection part (electronic device) having one or more wirings, a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, a computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other suitable processing as necessary, and then stored in a computer memory.

[0097] It should be understood that various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above 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, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0098] Example 4, referring to Figures 3 - 4 is another embodiment of the present invention. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments. In this embodiment, experiments are respectively conducted on the existing traditional method and the method of this embodiment.

[0099] In this embodiment, experiments were conducted on the existing traditional method and the method of this embodiment respectively. The experimental environment was a relay protection training room of a power supply company, equipped with a complete set of facilities and equipment such as a monitoring system, switch cabinets, protection devices, and measuring and control devices inside the substation. Eight groups of faults in the signal circuit, control circuit, and measurement circuit of different devices were randomly set. First, secondary team member A used the traditional method to conduct troubleshooting for 2 groups of faults and record the query time. Subsequently, secondary team member B used the traditional method to conduct troubleshooting for 2 groups of faults and record the query time. Then, secondary team member A used the method of this embodiment to conduct troubleshooting for 2 groups of faults and record the query time, and secondary team member B used the method of this embodiment to conduct troubleshooting for 2 groups of faults and record the query time. The summary is as follows:

[0100] Table 1 Data Comparison Table

[0101] Traditional method Signal circuit Control circuit Measurement circuit Troubleshooting time of the first group of Person A (min) 20 18 15 Troubleshooting time of the second group of Person A (min) 23 15 14 Troubleshooting time of the third group of Person B (min) 13 10 8 Troubleshooting time of the fourth group of Person B (min) 12 8 7 Method of this embodiment - - - Troubleshooting time of the fifth group of Person A (min) 5 3 3 Troubleshooting time of the sixth group of Person A (min) 4 3 3 Troubleshooting time of the seventh group of Person B (min) 3 4 3 Troubleshooting time of the eighth group of Person B (min) 3 3 2

[0102] The above experimental data show that secondary team member B is more experienced than member A. When using the traditional method for troubleshooting, the time required by member B is significantly lower than that of member A, which reflects the proficiency of member B in troubleshooting. However, after using the method of this embodiment, the troubleshooting efficiency of both the more experienced member B and the relatively less experienced member A has been greatly improved. In addition, the effectiveness of the method of this embodiment lies in that it can significantly reduce the impact of the difference in work experience among personnel on the troubleshooting efficiency, which means that even technicians without rich work experience can achieve efficient troubleshooting of secondary circuits through the method of this embodiment, thereby improving the operation efficiency and quality of the entire team.

[0103] Refer to Figure 3 The luminous tags installed on the on-site switch and relay protection device.

[0104] Refer to Figure 4 Under normal circumstances, the LED lamp is in the off state. When the loop communication state is abnormal, the LED lamp will be triggered to light up, and the on-site operation and maintenance personnel can quickly identify the location of the loop fault through the LED lamp.

[0105] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A digital operation and maintenance system for relay protection secondary circuit, characterized in that: include: Local terminals, edge terminals, and management terminals; The local terminal is connected to the management terminal through the edge terminal; Each component to be monitored of the secondary circuit in the local terminal is arranged with a passive light-emitting tag, each component to be monitored is connected to the first LED of the arranged passive light-emitting tag through a first intelligent switch, and each component to be monitored is connected to the second LED of the arranged passive light-emitting tag through a second intelligent switch; La and Lb are respectively the abnormal state of the monitoring component and the abnormal state of the communication of the tag edge device, which are monitored and identified by the management terminal and sent to the edge end to control the first intelligent switch and the second intelligent switch; L1, L2, and L3 are the three states of abnormal monitoring component data, abnormal monitoring component channel, and normal monitoring component, respectively, corresponding to the first LED yellow, red, and green; L4 and L5 are respectively the abnormal lighting of the first LED of the passive light-emitting tag and the normal lighting of the first LED, corresponding to the red and green of the second LED; When La=L1, the first LED is switched to yellow through the first intelligent switch. When the first LED is lit successfully, the RFID frequency is adjusted and fed back to the edge end. Lb=L5 is set to control the second LED to switch to green through the second and third intelligent switches. When the first LED fails to light up, the RFID frequency remains unchanged and fed back to the edge end. Lb=L4 is set to control the second LED to switch to red through the second and third intelligent switches. When La=L2, the first LED is switched to red through the first intelligent switch. When the first LED is lit successfully, the RFID frequency is adjusted and fed back to the edge end. Lb=L5 is set to control the second LED to switch to green through the second and third intelligent switches. When the first LED fails to light up, the RFID frequency remains unchanged and fed back to the edge end. Lb=L4 is set to control the second LED to switch to red through the second and third intelligent switches. When La=L3, the first LED is switched to green through the first intelligent switch. When the first LED is lit successfully, the RFID frequency is adjusted and fed back to the edge end. Lb=L5 is set to control the second LED to switch to green through the second and third intelligent switches. When the first LED fails to light up, the RFID frequency remains unchanged and fed back to the edge end. Lb=L4 is set to control the second LED to switch to red through the second and third intelligent switches. When La=L1, the management terminal continuously sends signals to the edge end, the edge end continuously controls the first intelligent switch, the first LED lights up, and the management terminal does not send signals, then the first LED turns off; When La=L2, the management terminal sends a signal to the edge end once, the edge end continuously controls the first intelligent switch, and the first LED lights up. After the management terminal sends a signal to the edge end for the second time, the edge end stops controlling the first intelligent switch, and the first LED turns off. When La=L3, the management terminal sends a signal to the edge end at one time, and the edge end controls the first intelligent switch at one time, and the first LED lights up once and then turns off automatically; The first LED and the second LED emit different colors; The second LED is connected to the backup power supply via a third intelligent switch; The passive light-emitting tag also includes an RFID and a two-dimensional code, and the two-dimensional code is connected to the database of the edge end; The database is connected to the multimodal communication module of the edge end, and the database includes secondary loop information; The first intelligent switch, the second intelligent switch and the third intelligent switch are all connected to the multimodal communication module; The management terminal is connected to the multimodal communication module through a heartbeat mechanism to obtain the on / off status of the local terminal and the edge terminal; In the case of abnormal on / off status, the management terminal sends control instructions through the multimodal communication module to control the on / off of the first smart switch, the second smart switch and the third smart switch, and locates the abnormal component to be monitored based on the difference in the light colors of the first LED and the second LED.

2. A digital operation and maintenance system for a relay protection secondary circuit according to claim 1, characterized in that: The components to be monitored include secondary circuit equipment, secondary circuit terminals and secondary circuit cables; Each component to be monitored corresponds to a passive luminous tag one by one.

3. A digital operation and maintenance system for a relay protection secondary circuit according to claim 2, characterized in that: The secondary circuit information includes secondary circuit drawings, secondary circuit equipment schematics, secondary circuit technical specifications and current node marking drawings.

4. A digital operation and maintenance system for a relay protection secondary circuit according to claim 3, characterized in that: The first intelligent switch and the first LED are connected in parallel with the component to be monitored at the arrangement position to form a first loop; The second intelligent switch and the second LED are connected in parallel with the component to be monitored at the arrangement position to form a second loop; The third intelligent switch and the second LED are both connected in parallel with the backup power supply to form a third loop.

5. A digital operation and maintenance system for a relay protection secondary circuit according to claim 4, characterized in that: The abnormal on / off state includes a first abnormal state and a second abnormal state; The first abnormal state is that the first intelligent switch, the second intelligent switch and the third intelligent switch fail to return confirmation information according to the heartbeat signal sent by the heartbeat mechanism; The second abnormal state is that the confirmation information of the first intelligent switch, the second intelligent switch and the third intelligent switch does not match the control instruction; The database is set up with an update mechanism to update the secondary circuit information in the database based on the update instructions of the management terminal.

6. A digital operation and maintenance system for a relay protection secondary circuit according to claim 5, characterized in that: The secondary circuit equipment includes a relay, a circuit breaker control unit, a measuring instrument and a signal converter; The secondary circuit terminals include terminal boards and wiring terminals; Secondary circuit cables include control cables, signal cables, communication cables and power cables.

7. A digital operation and maintenance system for a relay protection secondary circuit according to claim 6, characterized in that: The secondary circuit drawing, the secondary circuit equipment schematic diagram, the secondary circuit technical specification and the current node marking drawing are all electronic drawings.

8. A digital operation and maintenance method for a relay protection secondary circuit, applied to a digital operation and maintenance system for a relay protection secondary circuit as claimed in any one of claims 1 to 7, characterized in that: include: Send heartbeat signals to local terminals and edge terminals through the management terminal; Collect feedback signals and determine the on / off status of the device based on the feedback signals; The first intelligent switch and the second intelligent switch are turned on, the lighting status of the first LED and the second LED is obtained, whether there is a functional abnormality or a fault is determined, and corresponding measures are taken accordingly.

9. A digital operation and maintenance method for a relay protection secondary circuit according to claim 8, characterized in that: include: The determining of the on / off status of the device based on the feedback signal includes: When the equipment is in an abnormal state, a communication abnormality warning will be issued; When the on / off state of the device is normal, the first intelligent switch and the second intelligent switch are turned on, the lighting state of the first LED and the second LED is obtained, and whether there is a functional abnormality or failure is determined; When the lighting states of the first LED and the second LED are both abnormal, disconnect the first smart switch and the second smart switch, connect the third smart switch, and determine the lighting state of the second LED; If the lighting state of the second LED is normal, the output secondary circuit is abnormal, otherwise replace the second LED, reconnect the first smart switch and the second smart switch, and determine whether there is a functional abnormality or failure; The abnormal secondary circuit is located according to the passive luminous tag where the abnormal secondary circuit is located.

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