Relay protection secondary circuit digital operation and maintenance system and method

Abstract

The invention discloses a relay protection secondary circuit digital operation and maintenance system and method, and relates to the technical field of power system relay protection, and the method comprises the steps: transmitting a heartbeat signal to a local terminal and an edge end through a management terminal; collecting a feedback new signal, and judging the on-off state of the equipment based on the feedback signal; the first intelligent switch and the second intelligent switch are switched on, the light-emitting states of the first LED and the second LED are obtained, whether function abnormity or faults exist or not is judged, and corresponding measures are taken according to the function abnormity or faults. According to the invention, real-time heartbeat signal communication and an intelligent LED feedback system are implemented among the management terminal, the local terminal and the edge end, so that the problems of slow fault response and inaccurate fault positioning of the secondary circuit in the prior art are solved. By monitoring the on-off state of the equipment in real time and analyzing a feedback signal, the system is allowed to perform fault diagnosis quickly and automatically switch a control path to maintain system operation when detecting abnormality, or indicate a specific fault position for quick repair.

Description

Technical Field

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

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

[0003] Digitizing secondary circuits can improve data accuracy and transmission efficiency, and reduce errors caused by traditional analog signal attenuation and interference. Secondly, through real-time data analysis and remote monitoring functions, potential problems in the power system can be discovered and resolved in a timely manner, improving the system's response speed and reliability. In addition, digitalization can also help simplify maintenance processes and optimize resource allocation, significantly improving the overall efficiency and economic benefits of the power system.

[0004] The operation and maintenance of existing relay protection secondary circuits mainly rely on manual labor, which is inefficient and easily affected by differences in manual technology. When circuit abnormalities occur, abnormal nodes cannot be quickly located. In actual operations, due to the complex and cumbersome connection relationships between equipment, cables and terminals, traditional management methods are difficult to effectively cope with the increasing complexity, accuracy and speed requirements in secondary circuits, making secondary circuit fault diagnosis and maintenance processes more difficult and time-consuming. Summary of the invention

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

[0006] Therefore, the technical problem solved by the present invention is: considering that the operation and maintenance of existing secondary circuits rely on manual labor, the secondary circuits are complex, and when abnormalities occur, the detection efficiency is low, the accuracy is poor, the time is long, and it is easily affected by human subjective factors. How to solve the problem of not being able to quickly locate abnormal circuit nodes.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a digital operation and maintenance system for a relay protection secondary circuit, which comprises the following steps: 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; 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 terminal. 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 terminal. 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 terminal. 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 terminal. 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 terminal. 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 terminal. 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 terminal, the edge terminal 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 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 turns off. When La=L3, the management terminal sends a signal to the edge terminal at one time, and the edge terminal 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 terminal, 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.

[0008] As a preferred solution of the digital operation and maintenance system for a relay protection secondary circuit described in the present invention, wherein: 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 terminal to control the first intelligent switch and the second intelligent switch; The L1, L2, and L3 are respectively the three states of abnormal monitoring component data, abnormal monitoring component channel, and normal monitoring component, corresponding to the first LED yellow, red, and green; The L4 and L5 respectively represent the abnormal lighting and normal lighting of the first LED of the passive luminous tag, corresponding to the red and green colors of the second LED.

[0009] As a preferred solution of a digital operation and maintenance system for a relay protection secondary circuit described in the present invention, wherein: 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.

[0010] As a preferred solution of a digital operation and maintenance system for a relay protection secondary circuit described in the present invention, the secondary circuit information includes secondary circuit drawings, secondary circuit equipment schematics, secondary circuit technical specifications and current node marking drawings.

[0011] As a preferred solution of a digital operation and maintenance system for a relay protection secondary circuit described in 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; 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.

[0012] As a preferred solution of a digital operation and maintenance system for a relay protection secondary circuit according to the present invention, wherein: 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.

[0013] As a preferred solution of a digital operation and maintenance system for a relay protection secondary circuit described in the present invention, wherein: 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.

[0014] As a preferred solution of the digital operation and maintenance system for a relay protection secondary circuit described in the present invention, 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.

[0015] Another object of the present invention is to provide a digital operation and maintenance method for a relay protection secondary circuit, which can quickly locate and respond to abnormal conditions in the power system through real-time monitoring and automatic diagnosis functions, thereby solving the problems of slow response and difficulty in locating power system faults in the prior art.

[0016] In order to solve the above technical problems, the present invention provides the following technical solutions: a digital operation and maintenance method for a relay protection secondary circuit, comprising: sending a heartbeat signal to a local terminal and an edge terminal through a management terminal; Collect feedback signals and determine the on / off status of the device based on the feedback signals; turn on the first intelligent switch and the second intelligent switch, obtain the lighting status of the first LED and the second LED, determine whether there is a functional abnormality or failure, and take corresponding measures accordingly.

[0017] As a preferred solution of the digital operation and maintenance method of a relay protection secondary circuit described in the present invention, wherein: the judgment of the on / off state 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.

[0018] Beneficial effects of the present invention: The present invention solves the problems of slow secondary circuit fault response and inaccurate fault location in the prior art by implementing real-time heartbeat signal communication and intelligent LED feedback systems between the management terminal, the local terminal and the edge terminal. By real-time monitoring of the on / off status of the equipment and analyzing the feedback signal, 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 rapid repair. Through the integrated use of intelligent switches and passive luminous tags, the location and nature of the fault are accurately displayed and recorded, greatly improving fault handling efficiency and system stability, ensuring the continuous operation and reliability of the power system, while reducing maintenance costs and downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them: Figure 1 A schematic diagram of the structure of a digital operation and maintenance system for a relay protection secondary circuit provided by the first embodiment of the present invention; Figure 2 A schematic flow chart of a digital operation and maintenance method for a relay protection secondary circuit provided in accordance with a second embodiment of the present invention; Figure 3 A schematic diagram of a luminous label installed on a field switch and a relay protection device in a digital operation and maintenance method for a relay protection secondary circuit provided in a fourth embodiment of the present invention; Figure 4 A schematic diagram of the flashing LED of a luminous label of a digital operation and maintenance method for a relay protection secondary circuit provided in the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0020] 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.

[0021] Example 1, reference Figure 1 As an embodiment of the present invention, a digital operation and maintenance system for a relay protection secondary circuit is provided, comprising: a local terminal, an edge terminal and a management terminal, wherein the local terminal is connected to the management terminal via 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, wherein the first LED and the second LED have different light-emitting colors; The second LED is connected to the backup power supply via a third intelligent switch; The passive light-emitting tag further includes an RFID and a QR code, the QR code is connected to a database of the edge terminal, the database is connected to a multimodal communication module of the edge terminal, wherein 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; When the on / off state is abnormal, the management terminal sends a control instruction 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.

[0022] Among them, the local terminal is responsible for directly connecting with each component to be monitored in the secondary circuit. Each component is equipped with a passive luminous tag, including an LED light and an RFID / QR code. The local terminal realizes real-time monitoring by collecting data provided by these tags. The edge terminal acts as a bridge between the local terminal and the management terminal, responsible for processing data from the local terminal, and storing detailed information about the secondary circuit through the database to ensure that the data is updated in real time and accessible to the management terminal. The management terminal is the control center of the system. It is connected to the multimodal communication module of the edge terminal, uses a heartbeat mechanism to monitor the status of the entire system, and sends control instructions to adjust the intelligent switch when an abnormal on / off state is detected to achieve 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 contains RFID and QR code functions for verification, positioning and information acquisition. The first smart switch, the second smart switch, and the third smart switch control the power supply of the LED lights connected to them respectively, allowing remote control of the light status to indicate the operating status or fault status of the components, and accessing the backup power supply through the third smart switch to switch the power-on status of the second LED to achieve repeated verification of the complete circuit nodes of a single LED, avoiding the problem of inaccurate results caused by a single verification. The database stores all important information about the secondary circuit, such as drawings, equipment schematics, etc., and the multimodal communication module handles the transmission of this data, ensuring that the management terminal can receive and process data from the edge in real time, so that maintenance personnel can quickly obtain the location of abnormal circuit nodes in the entire circuit and improve the speed of circuit repair.

[0023] It should be noted that the digital operation and maintenance system of the relay protection secondary circuit has greatly improved 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 LEDs of different colors and connected to the various components of the secondary circuit through intelligent switches. This setting not only realizes the intuitive display of the fault status, but also allows the problem area to be quickly identified and located through remote control. In addition, by connecting RFID and QR code technology to the database, detailed information of each component can be obtained in real time, so as to accurately track the specific cause and location of the fault. The application of the heartbeat mechanism ensures the communication stability between the various parts of the system, and quickly responds to any possible communication interruption or abnormal situation by monitoring the connection status in real time. The digital configuration of this system not only reduces the dependence on manual inspections and reduces maintenance costs, but also improves the speed and accuracy of fault diagnosis, ensuring the efficient operation and system safety of the power system.

[0024] In some embodiments, the components to be monitored include secondary circuit equipment, secondary circuit terminals, and secondary circuit cables.

[0025] Among them, secondary circuit equipment, secondary circuit terminals and secondary circuit cables are the basic components of the secondary circuit.

[0026] In some embodiments, the secondary circuit information specifically includes secondary circuit drawings, secondary circuit equipment schematics, secondary circuit technical specifications, and current node marking drawings.

[0027] Among them, the secondary circuit drawing provides the layout and configuration of the entire secondary circuit, including detailed diagrams of all connections, equipment and their configuration methods, so that maintenance personnel can quickly understand the layout of the entire power system and the relationship between the various components, which is convenient for troubleshooting and system optimization. The secondary circuit equipment schematic diagram shows the working principle and internal structure of a specific device, including circuit design and functional description, helping technicians understand the specific functions and working mechanisms of each device, and facilitating rapid and accurate diagnosis and repair when a fault occurs. The secondary circuit technical manual provides detailed technical specifications, operating instructions and safety information for the equipment to ensure that all operations and maintenance activities are carried out in accordance with the manufacturer's standards, reduce operating errors, and improve the safety of system operation. The current node marking drawing identifies the precise location of a specific device or circuit in the entire secondary circuit. You can directly scan the QR code to obtain relevant information about the node to which it belongs, allowing you to quickly locate a specific node, greatly improving the speed of fault finding and resolution, which is especially important in complex networks or large facilities.

[0028] In some embodiments, 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.

[0029] It can be understood that the form of electronic diagram is the basis for realizing digital processing of secondary circuits.

[0030] In some embodiments, each component to be monitored corresponds to the passive luminous tag one by one.

[0031] It should be noted that, through a one-to-one correspondence approach, it is ensured that each component to be monitored can be accurately monitored for abnormalities, thereby improving the ability to quickly locate faults in the secondary circuit when an abnormality occurs.

[0032] In some embodiments, 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, and the third intelligent switch and the second LED are connected in parallel with the backup power supply to form a third loop.

[0033] It should be noted that in the digital operation and maintenance system of the relay protection secondary circuit, 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 an independent monitoring and control circuit for each component. This configuration allows the system to more accurately control and monitor the status of each component, and provides intuitive status indications through LED lights of different colors, making fault diagnosis and location faster and more accurate. In addition, the parallel configuration of the third intelligent switch with the second LED and the backup power supply performs secondary verification of the test results, avoiding the problem of the second LED being always on due to a single verification or circuit failure, and enhancing the reliability and stability of the system. This multi-circuit configuration greatly improves the flexibility and fault response capabilities of the system.

[0034] In some embodiments, the on-off state abnormality 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 conform to the control instruction.

[0035] It should be noted that in this digital operation and maintenance system for relay protection secondary circuits, two abnormal states are defined to enhance the system's fault monitoring and response capabilities. The first abnormal state detects the response of the intelligent switch through the heartbeat mechanism to ensure the communication integrity of the system and the online status of the equipment. The second abnormal state monitors the execution accuracy of the intelligent switch to ensure that the received control instructions are executed correctly. This dual monitoring strategy greatly improves the reliability and safety 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 maintenance efficiency and the overall performance of the system.

[0036] In some embodiments, the database is provided with an update mechanism, and the update mechanism is for updating the secondary circuit information in the database based on an update instruction of the management terminal.

[0037] It can be understood that a database with an update mechanism is set up in the digital operation and maintenance system of the relay protection secondary circuit, allowing the secondary circuit information in the database to be dynamically updated through update instructions issued by the management terminal. Such a configuration ensures that all operations and monitoring are based on the latest and most accurate system data, thereby improving the efficiency of maintenance and the accuracy of system decisions. In addition, the update mechanism also supports the adaptability and scalability of the system, enabling the system to flexibly respond to changing operational requirements and technological upgrades.

[0038] In some embodiments, the secondary circuit equipment includes a relay, a circuit breaker control unit, a measuring instrument and a signal converter, the secondary circuit terminal includes a terminal board and a wiring terminal, and the secondary circuit cable includes a control cable, a signal cable, a communication cable and a power cable.

[0039] Example 2, reference Figure 2 According to an embodiment of the present invention, a method for a digital operation and maintenance system of a relay protection secondary circuit is provided, comprising: S1: Sending a heartbeat signal to the local terminal and the edge terminal through the management terminal; S2: Collect feedback signals, and determine the on / off status of the device based on the feedback signals. If the on / off status of the device is abnormal, proceed to step S7; otherwise, proceed to step S3; S3: Turn on the first smart switch and the second smart switch to obtain the lighting status of the first LED and the second LED; 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, and judge the lighting state of the second LED. If the lighting state of the second LED is normal, the secondary circuit is abnormal. Otherwise, enter step S5. S5: Replace the second LED and return to step S3; S6: Locate the abnormal secondary circuit according to the passive luminous tag where the abnormal secondary circuit is located; S7: Issue a communication abnormality warning.

[0040] The present invention can efficiently monitor the communication status of each component of the digital operation and maintenance system of the relay protection secondary circuit through the heartbeat mechanism, avoid the problem of secondary circuit monitoring failure caused by abnormal communication status, and effectively reduce the cost of manual inspection. In addition, when the first intelligent switch and the second intelligent switch are closed, if the LED abnormality determines that the secondary circuit is abnormal, the third intelligent switch of the equipment can perform a secondary diagnosis on the abnormal result to avoid misdiagnosis of secondary circuit abnormality due to LED damage, effectively reduce the frequency of false detection, avoid repeated circuit cutting, and increase the stability of the circuit. When it is determined that there is a secondary circuit abnormality, the abnormal node is quickly located according to the passive light-emitting tag, the secondary circuit maintenance efficiency is improved, and the reliability and high sensitivity of the secondary circuit are improved.

[0041] Example 3

[0042] If the functions are implemented in the form of software functional units and sold or used as independent products, they 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, a server, or a network device, etc.) to perform all or part of the steps of the methods described in 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., which can store program codes.

[0043] 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.

[0044] 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, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0045] 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.

[0046] Example 4, reference Figure 3~Figure 4 This 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. This embodiment experiments the existing traditional method and the method of this embodiment respectively.

[0047] This embodiment experiments on the existing traditional methods and the method of this embodiment. The experimental environment is a relay protection training room of a power supply company, equipped with a complete set of substation monitoring systems, cabinets, protection devices, measurement and control devices and other facilities and equipment, and randomly set up 8 groups of signal circuits, control circuits and measurement circuit faults of different devices. First, let the secondary team member A use the traditional method to perform 2 groups of fault troubleshooting and record the query time, and then let the secondary team member B use the traditional method to perform 2 groups of fault troubleshooting and record the query time; then let the secondary team member A use the method of this embodiment to perform 2 groups of fault troubleshooting and record the query time, and let the secondary team member B use the method of this embodiment to perform 2 groups of fault troubleshooting and record the query time, which is summarized as follows: Table 1 Data comparison table , The above experimental data show that secondary team member B is more experienced than member A. When using traditional methods for troubleshooting, the time required by member B is significantly lower than that of member A, which reflects member B's proficiency in troubleshooting. However, after using the method of this embodiment, both the experienced member B and the relatively less experienced member A have greatly improved their troubleshooting efficiency. In addition, the effectiveness of the method of this embodiment lies in that it can significantly reduce the impact of differences in work experience between personnel on troubleshooting efficiency, which means that even technicians without rich work experience can achieve efficient secondary circuit troubleshooting through the method of this embodiment, thereby improving the work efficiency and quality of the entire team.

[0048] Reference Figure 3 It is a luminous label installed on field switches and relay protection devices.

[0049] Reference Figure 4 Under normal circumstances, the LED light is off. When the loop communication status is abnormal, the LED light will be triggered to light up. When the operation and maintenance personnel arrive at the site, they can quickly identify the location of the loop fault through the LED light.

[0050] 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 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; 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 terminal. 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 terminal. 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 terminal. 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 terminal. 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 terminal. 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 terminal. 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 terminal, the edge terminal 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 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 turns off. When La=L3, the management terminal sends a signal to the edge terminal at one time, and the edge terminal 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 terminal, 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 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 terminal to control the first intelligent switch and the second intelligent switch; The L1, L2, and L3 are respectively the three states of abnormal monitoring component data, abnormal monitoring component channel, and normal monitoring component, corresponding to the first LED yellow, red, and green; The L4 and L5 respectively represent the abnormal lighting and normal lighting of the first LED of the passive luminous tag, corresponding to the red and green colors of the second LED.

3. A digital operation and maintenance system for a relay protection secondary circuit according to claim 2, 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.

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

5. A digital operation and maintenance system for a relay protection secondary circuit according to claim 4, 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.

6. A digital operation and maintenance system for a relay protection secondary circuit according to claim 5, 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.

7. A digital operation and maintenance system for a relay protection secondary circuit according to claim 6, 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.

8. A digital operation and maintenance system for a relay protection secondary circuit according to claim 7, 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.

9. A digital operation and maintenance method for a relay protection secondary circuit, 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.

10. A digital operation and maintenance method for a relay protection secondary circuit according to claim 9, 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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