A battery loop fault monitoring relay verification system

Abstract

The application relates to a battery loop fault monitoring relay verification system. The system comprises a direct current power supply and a battery loop fault monitoring relay for triggering an alarm when the positive and negative half groups of a nuclear power plant battery voltage is unbalanced. It also comprises: an unbalanced bridge circuit for simulating the voltage imbalance state of the positive half group voltage and the negative half group voltage of the nuclear power plant battery. The sum of the positive half group voltage and the negative half group voltage of the battery is the total voltage value of the battery. A voltage measurement unit is connected with the unbalanced bridge circuit, used for measuring the positive half group voltage or the negative half group voltage of the direct current power supply and taking it as a first voltage value. An industrial computer is connected with the battery loop fault monitoring relay and the voltage measurement unit, used for receiving the alarm signal output by the battery loop fault monitoring relay when the alarm is triggered, obtaining and calculating a second voltage value according to the corresponding first voltage value under the alarm signal, and determining a verification result based on the first voltage value and the second voltage value.

Description

Technical Field

[0001] This invention relates to the field of electrical safety monitoring technology in nuclear power plants, and in particular to a battery circuit fault monitoring relay verification system. Background Technology

[0002] As the last line of defense directly ensuring nuclear safety, the importance of nuclear power plant batteries is self-evident. Battery circuit fault monitoring relays are online monitoring devices that utilize voltage balance characteristics to detect individual battery cell faults and circuit anomalies. When all cells in the entire battery bank are in good working order, without degradation, internal short circuits, or open circuits, the voltages of the positive and negative halves of the bank are perfectly balanced, and there are no alarms. However, when any cell in either the positive or negative half of the bank experiences a fault such as an internal short circuit, plate degradation, open circuit, or abnormal internal resistance, the voltage of the faulty half drops, while the voltage of the healthy half rises relatively. This disruption of the neutral point voltage balance triggers an alarm. Therefore, regularly calibrating battery circuit fault monitoring relays to ensure the battery bank has fault warning capabilities is a core task in ensuring the reliability of DC battery systems and meeting nuclear-grade equipment operation and maintenance standards.

[0003] However, the battery circuit fault monitoring relays configured on the DC switchboard require a long maintenance period for each test, the testing method is relatively traditional, and there are significant safety and quality risks, mainly in the following aspects: (1) Relay verification requires multiple external power supplies and multimeters. The circuit wiring scheme needs to be formulated temporarily by the person in charge of the work according to the drawings. Signal action relies on human observation. Contact measurement relies on manual operation using a multimeter. The work efficiency is low and the human risk is high.

[0004] (2) The relay action value requirements are high, and the verification process requires repeated adjustment of the power signal. Traditional testing instruments have problems such as difficulty in controlling the step amplitude, speed and accuracy, resulting in large errors in the relay verification results, and even interfering with the maintenance personnel's judgment to readjust the relay setting, which increases the workload and risk. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a battery circuit fault monitoring relay verification system, which addresses the shortcomings of traditional relay verification methods, such as complex verification operations leading to low verification efficiency and high human-caused risks.

[0006] The technical solution adopted by this invention to solve its technical problem is: a battery circuit fault monitoring relay calibration system, including a DC power supply and a battery circuit fault monitoring relay for triggering an alarm when the voltage of the positive and negative half groups of a nuclear power plant battery is unbalanced. The battery circuit fault monitoring relay calibration system further includes: An unbalanced bridge circuit, electrically connected to the DC power supply, is used to simulate the voltage imbalance between the positive and negative half-group voltages of a nuclear power plant battery; the sum of the positive and negative half-group voltages of the battery is the total voltage value of the battery. A voltage measurement unit, connected to the unbalanced bridge circuit, is used to measure the positive half-group voltage or the negative half-group voltage of the DC power supply and use it as the first voltage value. An industrial control computer is connected to the battery circuit fault monitoring relay and the voltage measurement unit. It is used to receive the alarm signal output by the battery circuit fault monitoring relay when the alarm is triggered, obtain and calculate the second voltage value according to the first voltage value corresponding to the alarm signal, and determine the verification result based on the first voltage value and the second voltage value. If the first voltage value is the positive half-group voltage, then the second voltage value is the negative half-group voltage; if the first voltage value is the negative half-group voltage, then the second voltage value is the positive half-group voltage.

[0007] Furthermore, in the battery circuit fault monitoring relay verification system of the present invention, the battery circuit fault monitoring relay verification system further includes: A contact monitoring unit is connected to the alarm contact of the battery circuit fault monitoring relay in the industrial control computer. It is used to monitor whether the alarm contact of the battery circuit fault monitoring relay is activated, and outputs the alarm signal to the industrial control computer when the alarm contact is activated.

[0008] Furthermore, in the battery circuit fault monitoring relay verification system of the present invention, the unbalanced bridge circuit includes a first rheostat module and a second rheostat module; the first end of the first rheostat module is connected to the negative terminal of the DC power supply, the second end of the first rheostat module is connected to the first end of the second rheostat module, the second end of the second rheostat module is connected to the positive terminal of the DC power supply, and a neutral potential point terminal M is provided on the connection line between the second end of the first rheostat module and the first end of the second rheostat module for connecting the neutral potential point terminal M of the battery circuit fault monitoring relay; The voltage between the positive terminal of the DC power supply and the neutral potential point terminal M is used as the positive half voltage of the battery, and the voltage between the negative terminal of the DC power supply and the neutral potential point terminal M is used as the negative half voltage of the battery. In the initial state, the resistance value of the first rheostat module connected to the circuit is equal to the resistance value of the second rheostat module connected to the circuit. At this time, the voltage at the neutral potential point is zero, and the first voltage value is equal to the second voltage value.

[0009] Furthermore, in the battery circuit fault monitoring relay verification system of the present invention, the first rheostat module includes a first resistor and a first rheostat, and the second rheostat module includes a second resistor and a second rheostat. The first resistor, the first rheostat, the second rheostat and the second resistor are connected in series in sequence.

[0010] Furthermore, in the battery circuit fault monitoring relay verification system of the present invention, the resistance values ​​of the first resistor and the second resistor are 5KΩ; and / or, the adjustable range of the resistance values ​​of the first rheostat and the second rheostat is 0-1KΩ.

[0011] Furthermore, in the battery circuit fault monitoring relay verification system described in this invention, the industrial control computer is used for: The resistance values ​​of the first and second rheostat modules are adjusted sequentially, and the voltage deviation coefficient is calculated based on the first and second voltage values. If the voltage deviation coefficient obtained after the positive half-group voltage imbalance alarm is triggered and the voltage deviation coefficient obtained after the negative half-group voltage imbalance alarm is both within the preset standard range, then the battery circuit fault monitoring relay is deemed to have been successfully verified.

[0012] Furthermore, in the battery circuit fault monitoring relay verification system of the present invention, the preset standard range is 2.7-3.3.

[0013] Furthermore, in the battery circuit fault monitoring relay verification system of the present invention, the battery circuit fault monitoring relay verification system further includes: The relay module unit is connected between the industrial control computer and the DC power supply, and is used to control the conduction and disconnection of the DC power supply output circuit.

[0014] Furthermore, in the battery circuit fault monitoring relay verification system of the present invention, the battery circuit fault monitoring relay verification system further includes: The power distribution unit is used to convert and distribute external AC power to provide 220V power to the DC power supply, 12V power to the industrial control computer, and 24V power to the voltage measurement unit, the contact monitoring unit, and the relay module group unit.

[0015] Furthermore, in the battery circuit fault monitoring relay verification system of the present invention, the industrial control computer includes a human-machine interaction touch screen, which is used to display the currently collected and recorded data and verification results, as well as historical data queries in real time.

[0016] The implementation of this invention has the following beneficial effects: The battery circuit fault monitoring relay verification system of this invention simulates the voltage imbalance state of the positive and negative half-group voltages of a nuclear power plant battery by using a DC power supply combined with an unbalanced bridge circuit, replacing the traditional dual power supply scheme, simplifying wiring complexity, and reducing equipment configuration costs. It also includes a voltage measurement unit connected to the unbalanced bridge circuit to measure the positive or negative half-group voltage of the DC power supply, achieving automatic internal voltage acquisition. The industrial control computer receives the alarm signal output when the battery circuit fault monitoring relay triggers an alarm, acquires and calculates the second voltage value based on the corresponding first voltage value under the alarm signal, and determines the verification result based on the first and second voltage values. This achieves automation and intelligence in the verification process, eliminating errors introduced by traditional manual observation, adjustment, and recording, and significantly improving verification accuracy and reliability. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the battery circuit fault monitoring relay verification system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the working principle of a battery circuit fault monitoring relay in the existing technology; Figure 3 This is a wiring diagram for the traditional method of monitoring and verifying battery circuit faults using relays. Figure 4 This is a schematic diagram of the structure of a battery circuit fault monitoring relay verification system provided in some embodiments of the present invention; Figure 5 This is a circuit schematic diagram of an unbalanced bridge circuit according to some embodiments of the present invention; Figure 6 This is a schematic diagram of the structure of a battery circuit fault monitoring relay verification system provided in some embodiments of the present invention; Figure 7 This is a data automatic collection, recording, and display interface according to some embodiments of the present invention. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0019] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0020] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0021] like Figure 1As shown, in a preferred embodiment, this solution provides a battery circuit fault monitoring relay verification system, including a DC power supply 10 and a battery circuit fault monitoring relay 20. The battery circuit fault monitoring relay 20 is mainly used to trigger an alarm when the positive and negative half-group voltages of a nuclear power plant battery are unbalanced. The battery circuit fault monitoring relay verification system of this embodiment also includes: an unbalanced bridge circuit 30, electrically connected to the DC power supply 10, used to simulate the voltage imbalance state of the positive and negative half-group voltages of a nuclear power plant battery. The sum of the positive and negative half-group voltages of the battery is the total voltage value of the battery. A voltage measurement unit 40, connected to the unbalanced bridge circuit 30, is used to measure the positive or negative half-group voltage of the DC power supply 10 and use it as a first voltage value. An industrial control computer 50, connected to the battery circuit fault monitoring relay 20 and the voltage measurement unit 40, is used to receive the alarm signal output when the battery circuit fault monitoring relay 20 triggers an alarm, acquire and calculate a second voltage value based on the corresponding first voltage value under the alarm signal, and determine the verification result based on the first and second voltage values. It can be understood that if the first voltage value is the positive half-group voltage, then the second voltage value is the negative half-group voltage. Conversely, if the first voltage value is the negative half-group voltage, then the second voltage value is the positive half-group voltage.

[0022] It should be noted that the voltage measurement unit 40 in this embodiment can be connected to point M and the positive terminal of the DC power supply to measure the voltage across point M and the positive terminal of the DC power supply (i.e., the positive half-group voltage). Alternatively, it can be connected to point M and the negative terminal of the DC power supply to measure the voltage across point M and the negative terminal of the DC power supply (i.e., the negative half-group voltage). The voltage measurement unit 40 in this embodiment can be an existing finished module or a multimeter. Specific module circuit structures can be found in existing technologies and will not be elaborated here.

[0023] Figure 2 This diagram illustrates the working principle of a battery circuit fault monitoring relay. The relay monitors the operating status of a group of batteries. The battery group is divided into a positive half and a negative half, with point M, located in the middle of the entire group, called the battery neutral potential point. For example, if the total voltage of a battery group is 116V, the positive potential is 58V, the negative potential is -58V, and the neutral potential point M is 0V. Connect the positive terminal (“+” in the diagram) of the battery circuit fault monitoring relay to the positive terminal of the first battery in the positive half, and connect the negative terminal (“-” in the diagram) to the negative terminal of the last battery in the negative half. Connect the M terminal of the relay to the battery neutral potential point M. When the entire battery group is normal, the voltage V of the positive half battery is... +M and the voltage V of the negative half of the battery pack M- When the voltages are equal, the battery circuit fault monitoring relay does not alarm. When an internal battery fault occurs in either the positive or negative half-group, the positive half-group battery voltage V...+M and the voltage V of the negative half of the battery pack M- Voltage imbalance, relay monitors V +M and V M- The voltage difference is monitored, and if the voltage difference exceeds the relay alarm setting value, an alarm will be triggered. Since the battery is the last line of defense for nuclear safety and an emergency power source, the reliability of the battery bank is crucial. Therefore, the calibration of the battery circuit fault monitoring relay is extremely important.

[0024] Figure 3 The diagram illustrates the wiring schematic for calibrating a battery circuit fault monitoring relay using a traditional method. This traditional method requires two adjustable DC linear power supplies. First, both power supplies are adjusted to 58V, simulating the positive and negative halves of the battery bank respectively. Wiring is then performed according to the operating mode of the battery circuit monitoring relay, and two multimeters are used to monitor the voltage V1 of DC linear power supply 1 and the voltage V2 of DC linear power supply 2.

[0025] The traditional test procedure is as follows: To maintain the voltage V2 of DC linear power supply 2 at a constant 58VDC, the voltage V1 of another DC linear power supply 1 is slowly adjusted. The fault alarm signal of the battery circuit monitoring relay is observed visually in real time until the relay alarms. Adjustment is then stopped, and the multimeter readings are recorded to determine the voltages V1 and V2. The verification result is determined by calculating whether the voltage deviation meets the verification success criteria. Similarly, to maintain the voltage V1 of DC linear power supply 1 at a constant 58VDC, the voltage V2 of another adjustable power supply 2 is slowly adjusted. The fault alarm signal of the battery circuit monitoring relay is observed visually in real time until the relay alarms. Adjustment is then stopped, and the voltages V1 and V2 are recorded. The voltage deviation calculation and judgment criteria are the same as before.

[0026] Traditional testing methods for battery circuit fault monitoring relays are cumbersome, requiring two adjustable power supplies and two multimeters, as well as numerous on-site wiring connections, which greatly inconveniences on-site operations.

[0027] Compared to traditional verification methods, the battery circuit fault monitoring relay verification system provided in this application simulates the voltage imbalance between the positive and negative half-group voltages of a nuclear power plant battery using a DC power supply combined with an unbalanced bridge circuit. This replaces the traditional dual-power supply scheme, simplifies wiring complexity, and reduces equipment configuration costs. A voltage measurement unit 40 connected to the unbalanced bridge circuit 30 is also included to measure the positive or negative half-group voltage of the DC power supply 10, enabling automatic internal voltage acquisition. The industrial control computer 50 receives the alarm signal output when the battery circuit fault monitoring relay 20 triggers an alarm, acquires and calculates the second voltage value based on the corresponding first voltage value under the alarm signal, and determines the verification result based on the first and second voltage values. This automates and automates the verification process, eliminating errors introduced by traditional manual observation, adjustment, and recording, and significantly improving verification accuracy and reliability.

[0028] It is understood that the battery circuit fault monitoring relay calibration system of this application can perform periodic calibration of the battery circuit fault monitoring relay according to the specific actual needs of the nuclear power plant. For example, the battery circuit fault monitoring relay can be calibrated every 2 or 4 refueling overhaul cycles in the nuclear power plant.

[0029] It is understandable that DC power supply 10 can provide a stable power supply voltage that is the same as the battery voltage value used in nuclear power plants. Typically, nuclear power plant batteries are 116V. If the nuclear power plant batteries are of other voltage levels, such as 48V systems, it is only necessary to set the output voltage of DC power supply 10 to 48V on the industrial control computer 50.

[0030] refer to Figure 4 In some embodiments, the battery circuit fault monitoring relay verification system further includes a contact monitoring unit 60, connected to the alarm contact of the battery circuit fault monitoring relay 20 via the industrial control computer 50. This unit monitors whether the alarm contact of the battery circuit fault monitoring relay is activated and outputs an alarm signal to the industrial control computer 50 when the alarm contact is activated. When some industrial control computers lack alarm signal monitoring and acquisition capabilities, the battery circuit fault monitoring relay verification system of this embodiment can acquire alarm signals through the contact monitoring unit 60 and transmit them to the industrial control computer. It should be noted that the contact monitoring unit 60 in this embodiment uses an existing finished module; the specific module circuit structure can be found in existing technologies and will not be described in detail here.

[0031] Figure 5A circuit diagram of an unbalanced bridge circuit according to some embodiments is shown. The unbalanced bridge circuit 30 includes a first rheostat module 301 and a second rheostat module 302. The first terminal of the first rheostat module 301 is connected to the negative terminal of the DC power supply 10, the second terminal of the first rheostat module 301 is connected to the first terminal of the second rheostat module 302, and the second terminal of the second rheostat module 302 is connected to the positive terminal of the DC power supply 10. A neutral potential terminal M is provided on the connection line between the second terminal of the first rheostat module 301 and the first terminal of the second rheostat module 302 for connecting to the neutral potential terminal M of the battery circuit fault monitoring relay 20. It is understood that the terminal is used to form a detachable electrical connection with external wires. It is understood that the terminal includes, but is not limited to, end structures that realize electrical conduction, such as terminals, pins, sockets, and spring-type terminals.

[0032] The voltage across the positive terminal and neutral potential terminal M of the DC power supply 10 serves as the positive half-group voltage of the battery, and the voltage across the negative terminal and neutral potential terminal M of the DC power supply 10 serves as the negative half-group voltage of the battery. Initially, the resistance value of the first rheostat module 301 connected to the circuit is equal to the resistance value of the second rheostat module 302 connected to the circuit. At this time, the neutral potential voltage is zero, and the first voltage value is equal to the second voltage value.

[0033] In this embodiment, the unbalanced bridge circuit 30 simulates the neutral potential shift caused by an internal battery fault by changing the resistance value of the rheostat module, thereby causing the positive and negative half-group voltages of the DC power supply 10 to become unbalanced, thus triggering a relay alarm.

[0034] In some embodiments, such as Figure 5As shown, the first rheostat module 301 includes a first resistor R1 and a first rheostat RP1, and the second rheostat module 302 includes a second resistor R2 and a second rheostat RP2. The first resistor R1, the first rheostat RP1, the second rheostat RP2, and the second resistor R2 are connected in series. In this embodiment, a multi-turn rheostat is preferred. A multi-turn rheostat can achieve precise control of the resistance value through multi-turn rotation adjustment, further improving the accuracy of voltage simulation adjustment during calibration. The first resistor (R1) and the second resistor (R2) provide a balanced bridge circuit and prevent the DC power supply from being short-circuited due to the simultaneous adjustment of the resistances of the first rheostat (RP1) and the second rheostat (RP2) to their extreme positions, thus providing circuit protection. Both the first rheostat (RP1) and the second rheostat (RP2) can be adjusted from 0, ensuring that in the initial state, point M is exactly the neutral potential point (i.e., the potential at point M is 0 at this time). This embodiment designs a novel unbalanced bridge circuit structure. By using a circuit design that combines fixed resistors (R1, R2) with multi-turn rheostats (RP1, RP2), the voltage imbalance of the positive and negative halves of the battery can be simulated with only a single 116V DC power supply.

[0035] Preferably, the resistance values ​​of the first resistor R1 and the second resistor R2 are 5KΩ. The adjustable range of the resistance values ​​of the first rheostat RP1 and the second rheostat RP2 is 0-1KΩ. This embodiment uses resistors with a resistance value of 5KΩ, which can control the loop current of the unbalanced bridge circuit to approximately 10mA, avoiding excessive current and heat generation in the unbalanced bridge circuit loop when the resistance is too small. Simultaneously, it ensures the voltage deviation sensitivity when adjusting the first rheostat (RP1) and the second rheostat (RP2). If the resistance is too large, the change in the neutral point potential caused by the change in the first rheostat (RP1) and the second rheostat (RP2) will be too small and insensitive.

[0036] The following example uses terminals as the wiring posts, a DC power supply 10 providing a stable 116V power supply, and a voltage measurement unit 40 measuring the negative half-group voltage as an example, combined with... Figure 4 and Figure 5 The verification system and testing methods of this application are described in further detail. Figure 5 In the circuit, the V+ terminal of DC power supply 10 is connected to the positive terminal of the battery circuit fault monitoring relay, and the V- terminal of DC power supply 10 is connected to the negative terminal of the battery circuit fault monitoring relay. The M terminal of the unbalanced bridge circuit 30 is connected to the relay terminal M. Therefore, V... +M =V1,V M- =V2. Then connect the alarm contact of the battery circuit fault monitoring relay to the contact monitoring unit 60. Regardless of how the rheostats RP1 and RP2 are adjusted, V +M and V M- The sum of the voltages remains constant at 116V.

[0037] The specific verification method is as follows: Initially, both the first rheostat RP1 and the second rheostat RP2 are adjusted to 0KΩ. At this time, V +M =V M- First, slowly rotate the first rheostat RP1 to gradually increase the resistance value, while keeping the second rheostat RP2 at 0KΩ. At this time, V +M As voltage increases, V M- A voltage drop, creating an imbalance between the high and low voltage levels, triggers an alarm on the battery circuit fault monitoring relay 20. The alarm contact of the relay 20 is activated, and upon detection of the alarm signal by the contact monitoring unit 60, the voltage measurement unit 40 immediately records the voltage V2 at the moment of the alarm. The voltage V1 can then be calculated using V1 = 116 - V2, and the voltage deviation coefficient C = |100| is calculated based on the internal calculation system. (V1-V2) / [0.5 [(V1+V2)]|, determine whether the voltage deviation coefficient C meets the preset standard range. Similarly, keep the first rheostat RP1 at 0KΩ, and slowly rotate the second rheostat RP2 to gradually increase the resistance value. At this time, V M- As voltage increases, V +M When the voltage drops and the battery circuit fault monitoring relay 20 triggers an alarm, the alarm contact of the relay 20 is activated. The process of acquiring voltage and calculating the deviation coefficient C within the system is the same as before. If the resistance values ​​of the first rheostat RP1 and the second rheostat RP2 are adjusted sequentially, and the voltage deviation coefficients obtained after the positive and negative half-group voltage imbalance triggers the alarm are both within the preset standard range, then the battery circuit fault monitoring relay is considered to have been successfully calibrated.

[0038] In some embodiments, the preset standard range for the voltage deviation coefficient is 2.7-3.3.

[0039] In some embodiments, reference is made to Figure 6 The battery circuit fault monitoring relay verification system also includes a relay module unit 70, connected between the industrial control computer 50 and the DC power supply 10, used to control the on / off state of the output circuit of the DC power supply 10. It should be noted that the relay module unit 70 in this embodiment uses an existing finished module; the specific module circuit structure can be found in existing technology and will not be described further here.

[0040] The battery circuit fault monitoring relay verification system also includes a power distribution unit 80, used to convert and distribute external AC power to provide 220V operating power to the DC power supply 10, 12V operating power to the industrial control computer 50, and 24V operating power to the voltage measurement unit 40, contact monitoring unit 60, and relay module group unit 70. It should be noted that the power distribution unit 80 in this embodiment uses an existing finished module; the specific module circuit structure can be found in existing technology and will not be described further here.

[0041] refer to Figure 6 The battery circuit fault monitoring relay verification system can achieve real-time communication between the industrial control computer 50, the voltage measurement unit 40, the relay module group unit 70, and the contact monitoring unit 60 via a communication bus. The industrial control computer 50 has a built-in processor and program storage medium. It controls the DC power supply 10 output by controlling the relay module group unit 70 through the communication bus, and collects signals from the voltage measurement unit 40 and the contact monitoring unit 60 through the communication bus.

[0042] In some embodiments, the industrial computer 50 includes a human-machine interface touch screen, which is used to display the currently collected and recorded data and verification results, as well as historical data queries in real time. Figure 7 The data automatic acquisition and recording display interface of some embodiments of this application is shown.

[0043] This embodiment integrates power distribution, communication control, voltage measurement, contact monitoring and other functional modules into one integrated verification system. It enables one-click operation through a human-machine interface, which greatly reduces on-site wiring and human intervention, improves the convenience and safety of operation, and reduces the risk of human error.

[0044] In other embodiments, dedicated calculator products and storage media can also be developed. Through embedded processors and customized programs, the verification methods can be standardized and reproducible, supporting rapid deployment and application in multi-site power plants, and providing a basic platform for subsequent technology iterations and functional expansion.

[0045] The computer-readable storage medium of the present invention can be any computer-readable storage medium capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a magnetic disk, or an optical disk.

[0046] The processor of this invention provides computing and control capabilities to support the operation of the entire device. It should be understood that, in the embodiments of this application, the processor may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0047] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0048] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0049] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A battery circuit fault monitoring relay verification system, characterized in that, The system includes a DC power supply (10) and a battery circuit fault monitoring relay (20) for triggering an alarm when the positive and negative half-groups of the nuclear power plant's battery voltage are imbalanced. The battery circuit fault monitoring relay calibration system also includes: An unbalanced bridge circuit (30) is electrically connected to the DC power supply (10) to simulate the voltage imbalance between the positive and negative half-group voltages of a nuclear power plant battery; the sum of the positive and negative half-group voltages of the battery is the total voltage value of the battery. The voltage measurement unit (40) is connected to the unbalanced bridge circuit (30) and is used to measure the positive half voltage or the negative half voltage of the DC power supply (10) and use it as the first voltage value. An industrial control computer (50) is connected to the battery circuit fault monitoring relay (20) and the voltage measurement unit (40) to receive the alarm signal output by the battery circuit fault monitoring relay (20) when the alarm is triggered, to obtain and calculate the second voltage value according to the first voltage value corresponding to the alarm signal, and to determine the verification result based on the first voltage value and the second voltage value. If the first voltage value is the positive half-group voltage, then the second voltage value is the negative half-group voltage; if the first voltage value is the negative half-group voltage, then the second voltage value is the positive half-group voltage.

2. The battery circuit fault monitoring relay verification system according to claim 1, characterized in that, The battery circuit fault monitoring relay verification system also includes: The contact monitoring unit (60) is connected to the alarm contact of the battery circuit fault monitoring relay (20) in the industrial control computer (50) and is used to monitor whether the alarm contact of the battery circuit fault monitoring relay (20) is activated, and output the alarm signal to the industrial control computer (50) when the alarm contact is activated.

3. The battery circuit fault monitoring relay verification system according to claim 1 or 2, characterized in that, The unbalanced bridge circuit (30) includes a first rheostat module (301) and a second rheostat module (302); the first end of the first rheostat module (301) is connected to the negative terminal of the DC power supply (10), the second end of the first rheostat module (301) is connected to the first end of the second rheostat module (302), the second end of the second rheostat module (302) is connected to the positive terminal of the DC power supply (10), and a neutral potential point terminal M is provided on the connection line between the second end of the first rheostat module (301) and the first end of the second rheostat module (302) for connecting the neutral potential point terminal M of the battery circuit fault monitoring relay (20); The voltage between the positive terminal of the DC power supply (10) and the neutral potential point terminal M is used as the positive half voltage of the battery, and the voltage between the negative terminal of the DC power supply (10) and the neutral potential point terminal M is used as the negative half voltage of the battery. In the initial state, the resistance value of the first rheostat module (301) connected to the circuit is equal to the resistance value of the second rheostat module (302) connected to the circuit. At this time, the voltage at the neutral potential point is zero, and the first voltage value is equal to the second voltage value.

4. The battery circuit fault monitoring relay verification system according to claim 3, characterized in that, The first rheostat module (301) includes a first resistor (R1) and a first rheostat (RP1), and the second rheostat module (302) includes a second resistor (R2) and a second rheostat (RP2). The first resistor (R1), the first rheostat (RP1), the second rheostat (RP2) and the second resistor (R2) are connected in series in sequence.

5. The battery circuit fault monitoring relay verification system according to claim 4, characterized in that, The resistance of the first resistor (R1) and the second resistor (R2) is 5KΩ; and / or, the resistance of the first rheostat (RP1) and the second rheostat (RP2) is adjustable in the range of 0-1KΩ.

6. The battery circuit fault monitoring relay verification system according to claim 3, characterized in that, The industrial computer (50) is used for: The resistance values ​​of the first rheostat module (301) and the second rheostat module (302) are adjusted sequentially, and the voltage deviation coefficient is calculated based on the first voltage value and the second voltage value. If the voltage deviation coefficient obtained after the positive half-group voltage imbalance alarm is triggered and the voltage deviation coefficient obtained after the negative half-group voltage imbalance alarm is both within the preset standard range, then the battery circuit fault monitoring relay is deemed to have been successfully verified.

7. The battery circuit fault monitoring relay verification system according to claim 6, characterized in that, The preset standard range is 2.7-3.

3.

8. The battery circuit fault monitoring relay verification system according to claim 1 or 2, characterized in that, The battery circuit fault monitoring relay verification system also includes: The relay module unit (70) is connected between the industrial computer (50) and the DC power supply (10) and is used to control the on and off of the output circuit of the DC power supply (10).

9. The battery circuit fault monitoring relay verification system according to claim 8, characterized in that, The battery circuit fault monitoring relay verification system also includes: The power distribution unit (80) is used to convert and distribute external AC power to provide 220V power to the DC power supply (10), 12V power to the industrial control computer (50), and 24V power to the voltage measurement unit (40), the contact monitoring unit (60), and the relay module group unit (70).

10. The battery circuit fault monitoring relay verification system according to claim 1, characterized in that, The industrial control computer (50) includes a human-machine interaction touch screen, which is used to display the currently collected and recorded data and verification results, as well as historical data queries in real time.

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