Nuclear class uninterruptible power supply and online fault detection method thereof

Abstract

This invention provides a nuclear-grade uninterruptible power supply (UPS) and its online fault detection method. The method includes: receiving a user's test command; based on the test command, switching the nuclear-grade UPS to test mode and adjusting the node voltages in the UPS; acquiring real-time node voltages; the real-time node voltages are the current voltages of the nodes monitored by the monitoring board after the node voltages are adjusted; and detecting whether the fault protection function of the nuclear-grade UPS is normal based on the real-time node voltages and a preset protection threshold. This invention effectively simplifies the fault testing process for nuclear-grade UPS and improves fault testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and in particular to a nuclear-grade uninterruptible power supply and its online fault detection method. Background Technology

[0002] An uninterruptible power supply (UPS) is a type of power supply containing energy storage devices, primarily used to provide uninterrupted power to equipment with high power stability requirements. Due to the hazardous nature of their energy sources, nuclear power plants face incalculable consequences from power outages; therefore, nuclear-grade UPS systems used in nuclear power plants have even higher requirements for stability and safety. To ensure the safe and stable operation of nuclear-grade UPS systems, fault simulations must be conducted before formal operation to test whether the various fault protection functions of the nuclear-grade UPS system can function properly.

[0003] In the existing technology, when conducting fault simulation tests on nuclear-grade uninterruptible power supplies, it is necessary to connect an external test power supply and set up an external test circuit at the work site to test the internal fault protection function of the nuclear-grade uninterruptible power supply.

[0004] However, nuclear-grade uninterruptible power supplies have numerous internal fault protection functions. When testing different fault protection functions, different external test power supplies and external test circuits need to be set up accordingly. This makes the entire fault simulation test process cumbersome and the test efficiency low. Summary of the Invention

[0005] This invention provides a nuclear-grade uninterruptible power supply and its online fault detection method to solve the problems of cumbersome testing process and low testing efficiency in the prior art when performing fault simulation testing on nuclear-grade uninterruptible power supplies.

[0006] In a first aspect, embodiments of the present invention provide an online fault detection method for a nuclear-grade uninterruptible power supply (UPS), applied to a control board inside the UPS, wherein a monitoring board is also provided inside the UPS, and the control board is communicatively connected to the monitoring board; the method includes:

[0007] Receive test commands from users;

[0008] Based on the test command, the nuclear-grade uninterruptible power supply is switched to test mode, and the node voltage in the nuclear-grade uninterruptible power supply is adjusted.

[0009] The real-time node voltage is obtained; the real-time node voltage is the current voltage of the node monitored by the monitoring board after the node voltage is adjusted.

[0010] Based on the real-time node voltage and the preset protection threshold, the fault protection function of the nuclear-grade uninterruptible power supply is checked to see if it is normal.

[0011] In one possible implementation, when the test command is a single test command, the step of switching the nuclear-grade uninterruptible power supply to test mode based on the test command and adjusting the node voltages in the nuclear-grade uninterruptible power supply includes:

[0012] Based on the fault protection function to be tested included in the single test instruction, the nuclear-level uninterruptible power supply is switched to the test mode corresponding to the fault protection function.

[0013] In the test mode, the voltage of the node in the nuclear-grade uninterruptible power supply corresponding to the fault protection function is adjusted accordingly.

[0014] In one possible implementation, when the fault protection function is a DC bus voltage overvoltage protection function or a DC bus voltage undervoltage protection function, the step of switching the nuclear-grade uninterruptible power supply to a test mode corresponding to the fault protection function included in the single test instruction includes:

[0015] The output terminal of the nuclear-grade uninterruptible power supply is disconnected, and the energy storage module of the nuclear-grade uninterruptible power supply is disconnected to obtain a nuclear-grade uninterruptible power supply in test mode.

[0016] In the test mode, adjusting the voltage of the node in the nuclear-grade uninterruptible power supply corresponding to the fault protection function includes:

[0017] For a nuclear-grade uninterruptible power supply in test mode, adjust the voltage value at the connection point between the second terminal of the rectifier module and the first terminal of the inverter module in the nuclear-grade uninterruptible power supply.

[0018] In one possible implementation, when the fault protection function is an output inverter voltage overvoltage protection function or an output inverter voltage undervoltage protection function, the step of switching the nuclear-grade uninterruptible power supply to a test mode corresponding to the fault protection function included in the single test instruction includes:

[0019] The output terminal of the nuclear-grade uninterruptible power supply is disconnected, and the second terminal of the inverter module in the nuclear-grade uninterruptible power supply is disconnected to obtain a nuclear-grade uninterruptible power supply in test mode.

[0020] In the test mode, adjusting the voltage of the node in the nuclear-grade uninterruptible power supply corresponding to the fault protection function includes:

[0021] For a nuclear-grade uninterruptible power supply in test mode, adjust the voltage value at the second terminal of the inverter module.

[0022] In one possible implementation, when the fault protection function is an overvoltage protection function or an undervoltage protection function for the rectified input AC voltage, the step of switching the nuclear-grade uninterruptible power supply to a test mode corresponding to the fault protection function included in the single test instruction includes:

[0023] The output terminal of the nuclear-grade uninterruptible power supply is disconnected, the first terminal of the rectifier module in the nuclear-grade uninterruptible power supply is disconnected, and the rectifier module is set to reverse working mode to obtain a nuclear-grade uninterruptible power supply in test mode.

[0024] In the test mode, adjusting the voltage of the node in the nuclear-grade uninterruptible power supply corresponding to the fault protection function includes:

[0025] For a nuclear-grade uninterruptible power supply in test mode, adjust the voltage value at the first terminal of the rectifier module.

[0026] In one possible implementation, when the fault protection function is a bypass voltage overvoltage protection function or a bypass voltage undervoltage protection function, the step of switching the nuclear-grade uninterruptible power supply to a test mode corresponding to the fault protection function included in the single test instruction includes:

[0027] Disconnect the output terminal of the nuclear-grade uninterruptible power supply, disconnect the input terminal of the bypass voltage regulator module in the nuclear-grade uninterruptible power supply, and connect the output terminal of the bypass voltage regulator module to the second terminal of the inverter module to obtain a nuclear-grade uninterruptible power supply in test mode.

[0028] In the test mode, adjusting the voltage of the node in the nuclear-grade uninterruptible power supply corresponding to the fault protection function includes:

[0029] For a nuclear-grade uninterruptible power supply in test mode, adjust the voltage value at the connection point between the output terminal of the bypass voltage regulator module and the first terminal of the inverter module.

[0030] In one possible implementation, adjusting the voltage of the node in the nuclear-level uninterruptible power supply corresponding to the fault protection function includes:

[0031] Adjust the voltage of the node corresponding to the fault protection function in the nuclear-level uninterruptible power supply according to the preset adjustment interval;

[0032] The acquisition of real-time node voltage includes:

[0033] Detect whether the node voltage reaches the preset protection threshold;

[0034] When the node voltage does not reach the preset protection threshold, the process jumps to the step of adjusting the voltage of the node corresponding to the fault protection function in the nuclear-level uninterruptible power supply according to the preset adjustment interval, and continues until the node voltage reaches the preset protection threshold, at which point the current real-time node voltage is obtained.

[0035] In one possible implementation, when the test command is a one-click test command, after detecting whether the fault protection function of the nuclear-level uninterruptible power supply is normal based on the real-time node voltage and the preset protection threshold, the following steps are included:

[0036] Check whether the one-click test command also includes the fault protection function to be tested;

[0037] When the one-click test command also includes a fault protection function to be tested, the process jumps to the step of switching the nuclear-grade uninterruptible power supply to test mode and adjusting the node voltage in the nuclear-grade uninterruptible power supply based on the test command, and continues to execute subsequent steps until all fault protection functions to be tested in the one-click test command are detected.

[0038] In one possible implementation, the fault protection function of the nuclear-level uninterruptible power supply is checked for normal operation based on the real-time node voltage and a preset protection threshold, including:

[0039] When the deviation between the real-time node voltage and the preset protection threshold is less than or equal to the preset deviation value, the fault protection function of the nuclear-level uninterruptible power supply is determined to be normal.

[0040] Secondly, embodiments of the present invention provide a nuclear-grade uninterruptible power supply, comprising: a control board, a monitoring board, a rectifier module, an inverter module, a bypass voltage regulator module, and an energy storage module. The control board is used to implement the steps of the online fault detection method for the nuclear-grade uninterruptible power supply as described in the first aspect or any possible implementation thereof.

[0041] This invention provides a nuclear-grade uninterruptible power supply (UPS) and its online fault detection method. By setting up a control board and a monitoring board inside the UPS, and switching the UPS to test mode based on the control board, the node voltages in the UPS are adjusted. The monitoring board obtains the corresponding real-time node voltages, thereby detecting whether the fault protection function is normal based on the real-time node voltages and preset protection thresholds. This makes the entire fault protection function test process unnecessary for external test power supplies and test circuits, and can be achieved solely through the control board and test board in the UPS, effectively simplifying the test process and improving test efficiency. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the structure of the nuclear-level uninterruptible power supply provided in an embodiment of the present invention;

[0044] Figure 2 This is a flowchart illustrating the implementation of the online fault detection method for the nuclear uninterruptible power supply provided in this embodiment of the invention.

[0045] Figure 3 This is a flowchart illustrating the implementation of switching a nuclear-grade uninterruptible power supply to test mode and adjusting the node voltage in the nuclear-grade uninterruptible power supply, as provided in an embodiment of the present invention.

[0046] Figure 4 This is a schematic diagram of the structure of the online fault detection device for the nuclear uninterruptible power supply provided in an embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of the control board provided in an embodiment of the present invention. Detailed Implementation

[0048] 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.

[0049] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0050] This invention provides an online fault detection method for nuclear-grade uninterruptible power supplies (UPS). This online fault detection method is applied to nuclear-grade UPSs. The executing entity of this online fault detection method can be a control board inside the nuclear-grade UPS. A monitoring board is also installed inside the nuclear-grade UPS. The control board and the monitoring board are communicatively connected. See also... Figure 1The nuclear-grade uninterruptible power supply (UPS) comprises: a rectifier module 11, an inverter module 12, an energy storage module 13, a bypass voltage regulator module 14, a control board 15, and a monitoring board 16. The first terminal of the rectifier module 11 is connected to a first AC power supply AC1 via switch K1, and the second terminal of the rectifier module is connected to the first terminal of the inverter module 12. Simultaneously, the second terminal of the rectifier module 11 is also connected to the energy storage module 13 via switch K2. The second terminal of the inverter module 12 is connected to the downstream load via switches K3 and K4. The input terminal of the bypass voltage regulator module 14 is connected to a second AC power supply AC2 via switch K5, and the output terminal is connected to the downstream load via switches K6 and K4.

[0051] When switches K1, K2, K3, and K4 are closed, the rectifier module 11, inverter module 12, and energy storage module 13 form the main power supply path. When switches K5, K6, and K4 are closed, the bypass voltage regulator module 14 forms a bypass. This redundant dual power supply path improves power supply stability and meets the application requirements of nuclear power plants. Under normal operating conditions, switches K3 and K6 are not simultaneously closed.

[0052] The control board 15 is communicatively connected to each of the aforementioned modules, and is used to control and adjust each module individually. The monitoring board 16 is communicatively connected to each of the aforementioned modules, and is used to monitor the voltage values ​​of each module in real time. Furthermore, the control board 15 and the monitoring board 16 are communicatively connected for transmitting voltage data.

[0053] Based on the hardware structure of the nuclear-grade uninterruptible power supply described above, this embodiment of the invention provides an online fault detection method for nuclear-grade uninterruptible power supplies. Figure 2 The implementation flowchart of the online fault detection method for nuclear-grade uninterruptible power supplies provided in this embodiment of the invention is described in detail below:

[0054] Step 201: Receive the user's test command.

[0055] The control board can receive test commands input by the user and, based on these commands, initiate subsequent fault detection steps. For ease of operation, a touchscreen can be installed within the nuclear-grade uninterruptible power supply (UPS) for user input of test commands. The touchscreen can then transmit the user-input test commands to the control board.

[0056] Step 202: Based on the test command, switch the nuclear-grade uninterruptible power supply to test mode and adjust the node voltage in the nuclear-grade uninterruptible power supply.

[0057] This invention provides two types of test commands: single-item test commands and one-click test commands. Single-item test commands are used to instruct the testing of a specific fault protection function. One-click test commands are used to instruct the testing of all fault protection functions.

[0058] In some embodiments, see Figure 3 When the test instruction is a single test instruction, step 202 may include:

[0059] Step 221: Based on the fault protection function to be tested included in the single test instruction, switch the nuclear-level uninterruptible power supply to the test mode corresponding to the fault protection function.

[0060] Step 222: In test mode, adjust the voltage of the node corresponding to the fault protection function in the nuclear-grade uninterruptible power supply.

[0061] In other words, when testing fault protection functions, the nuclear-grade uninterruptible power supply (UPS) is first switched from normal operating mode to the test mode corresponding to the fault protection function under test. Then, in this test mode, the voltage of the node corresponding to the fault protection function is adjusted to test the fault protection function.

[0062] In some embodiments, when the fault protection function is a DC bus voltage overvoltage protection function or a DC bus voltage undervoltage protection function, step 221 may include:

[0063] The output terminal of the nuclear-grade uninterruptible power supply (UPS) is disconnected, and the energy storage module in the nuclear-grade UPS is also disconnected, resulting in a nuclear-grade UPS in test mode.

[0064] Both the DC bus overvoltage protection and DC bus undervoltage protection functions are triggered by the voltage value at the DC bus. When the DC bus voltage value is higher than its corresponding overvoltage protection value, the DC bus overvoltage protection function will be triggered. When the DC bus voltage value is lower than its corresponding undervoltage protection value, the DC bus undervoltage protection function will be triggered.

[0065] See Figure 1 The voltage value at the DC bus is the voltage value at the connection point between the second terminal of the rectifier module 11 and the first terminal of the inverter module 12. When switching the nuclear-grade uninterruptible power supply from normal operation mode to test mode, the output terminal of the nuclear-grade uninterruptible power supply can be disconnected first to avoid affecting the downstream load. Secondly, the energy storage module 13 can be disconnected to prevent the energy storage module 13 from affecting the voltage value at the DC bus.

[0066] Based on the normal operating mode, the output of the nuclear-grade uninterruptible power supply can be disconnected by opening switch K4. By opening switch K2, the energy storage module 13 can be disconnected, thereby switching the nuclear-grade uninterruptible power supply from the normal operating mode to the test mode corresponding to the DC bus voltage overvoltage protection function and the DC bus voltage undervoltage protection function.

[0067] Based on this, step 222 may include:

[0068] For a nuclear-grade uninterruptible power supply in test mode, adjust the voltage value at the connection point between the second terminal of the rectifier module and the first terminal of the inverter module in the nuclear-grade uninterruptible power supply.

[0069] When testing the DC bus voltage overvoltage protection function, increase the voltage value at the connection point between the second terminal of the rectifier module and the first terminal of the inverter module.

[0070] When testing the DC bus voltage undervoltage protection function, reduce the voltage value at the connection point between the second terminal of the rectifier module and the first terminal of the inverter module.

[0071] In some embodiments, when the fault protection function is an output inverter voltage overvoltage protection function or an output inverter voltage undervoltage protection function, step 221 may include:

[0072] Disconnect the output terminal of the nuclear-grade uninterruptible power supply (UPS) and disconnect the second terminal of the inverter module in the nuclear-grade UPS to obtain a nuclear-grade UPS in test mode.

[0073] Both the output inverter voltage overvoltage protection and undervoltage protection functions are triggered by the voltage value at the second terminal of the inverter module. When the voltage value at the second terminal of the inverter module is higher than its corresponding overvoltage protection value, the output inverter voltage overvoltage protection function will be triggered. When the voltage value at the second terminal of the inverter module is lower than its corresponding undervoltage protection value, the output inverter voltage undervoltage protection function will be triggered.

[0074] See Figure 1 When switching the nuclear-grade uninterruptible power supply to test mode, the output terminal of the nuclear-grade uninterruptible power supply is disconnected, and the second terminal of the inverter module 12 is also disconnected.

[0075] Based on the normal operating mode, the output terminal of the nuclear-grade uninterruptible power supply can be disconnected by opening switch K4. By opening switch K3, the second terminal of inverter module 12 can be disconnected, thereby switching the nuclear-grade uninterruptible power supply from the normal operating mode to the test mode corresponding to the output inverter voltage overvoltage protection function and the output inverter voltage undervoltage protection function.

[0076] Based on this, step 222 may include:

[0077] For a nuclear-grade uninterruptible power supply in test mode, adjust the voltage value at the second terminal of the inverter module.

[0078] When testing the overvoltage protection function of the output inverter voltage, increase the voltage value at the second terminal of the inverter module.

[0079] When testing the undervoltage protection function of the output inverter voltage, reduce the voltage value at the second terminal of the inverter module.

[0080] In some embodiments, when the fault protection function is an overvoltage protection function for the rectified input AC voltage or an undervoltage protection function for the rectified input AC voltage, step 221 may include:

[0081] Disconnect the output terminal of the nuclear-grade uninterruptible power supply (UPS), disconnect the first terminal of the rectifier module in the nuclear-grade UPS, and set the rectifier module to reverse working mode to obtain the nuclear-grade UPS in test mode.

[0082] Both the rectifier input AC voltage overvoltage protection and undervoltage protection functions are triggered by the voltage value at the first terminal of the rectifier module. When the voltage value at the first terminal of the rectifier module is higher than its corresponding overvoltage protection value, the output rectifier input AC voltage overvoltage protection function will be triggered. When the voltage value at the first terminal of the rectifier module is lower than its corresponding undervoltage protection value, the rectifier input AC voltage undervoltage protection function will be triggered.

[0083] See Figure 1 When switching the nuclear-grade uninterruptible power supply (UPS) to test mode, the output terminal of the UPS is disconnected. The first terminal of the rectifier module 11 is disconnected, and the rectifier module 11 is set to reverse operating mode. The reverse operating mode of the rectifier module 11 refers to the operating mode that converts DC voltage to AC voltage. At this time, the second terminal of the rectifier module 11 serves as the input terminal for inputting DC voltage, and the first terminal serves as the output terminal for outputting AC voltage.

[0084] Based on the normal operating mode, the output terminal of the nuclear-grade uninterruptible power supply can be disconnected by opening switch K4. By opening switch K1, the first terminal of rectifier module 11 can be disconnected, and rectifier module 11 can be switched to reverse operating mode, thereby switching the nuclear-grade uninterruptible power supply from the normal operating mode to the test mode corresponding to the rectifier input AC voltage overvoltage protection function and the rectifier input AC voltage undervoltage protection function.

[0085] Based on this, step 222 may include:

[0086] For a nuclear-grade uninterruptible power supply in test mode, adjust the voltage value at the first terminal of the rectifier module.

[0087] When testing the AC voltage overvoltage protection function of the rectifier input, the voltage value at the first terminal of the rectifier module can be increased.

[0088] When testing the undervoltage protection function of the rectifier input AC voltage, the voltage value at the first terminal of the rectifier module can be reduced.

[0089] In some embodiments, when the fault protection function is a bypass voltage overvoltage protection function or a bypass voltage undervoltage protection function, step 221 may include:

[0090] Disconnect the output terminal of the nuclear-grade uninterruptible power supply (UPS), disconnect the input terminal of the bypass voltage regulator module in the UPS, and connect the output terminal of the bypass voltage regulator module to the second terminal of the inverter module to obtain the UPS in test mode.

[0091] Both the bypass voltage overvoltage protection and bypass voltage undervoltage protection functions are triggered by the voltage value at the connection point between the output terminal of the bypass voltage regulator module and the second terminal of the inverter module. When the voltage value at this connection point is higher than its corresponding overvoltage protection value, the output bypass voltage overvoltage protection function is triggered. When the voltage value at this connection point is lower than its corresponding undervoltage protection value, the bypass voltage undervoltage protection function is triggered.

[0092] See Figure 1 Based on the normal operating mode, the output of the nuclear-grade uninterruptible power supply can be disconnected by opening switch K4. The input of the bypass voltage regulator module 14 can be disconnected by opening switch K5. By closing switches K3 and K6, the output of the bypass voltage regulator module 14 can be connected to the second terminal of the inverter module 12, thereby switching the nuclear-grade uninterruptible power supply from the normal operating mode to the test mode corresponding to the bypass voltage overvoltage protection function and the bypass voltage undervoltage protection function.

[0093] Based on this, step 222 may include:

[0094] For a nuclear-grade uninterruptible power supply in test mode, adjust the voltage value at the connection point between the output terminal of the bypass voltage regulator module and the first terminal of the inverter module.

[0095] When testing the bypass voltage overvoltage protection function, the voltage value at the connection point between the output terminal of the bypass voltage regulator module and the second terminal of the inverter module can be increased.

[0096] When testing the bypass voltage undervoltage protection function, the voltage value at the connection point between the output terminal of the bypass voltage regulator module and the second terminal of the inverter module can be reduced.

[0097] Step 203: Obtain the real-time node voltage. The real-time node voltage is the current voltage of the node monitored by the monitoring board after adjusting the node voltage.

[0098] Following step 202 above, the control board can adjust the voltage value of the node corresponding to the fault protection function under test. Simultaneously, the monitoring board will monitor the current voltage of that node in real time and transmit this current voltage to the control board.

[0099] In some embodiments, step 202, "adjusting the voltage of the node in the nuclear-level uninterruptible power supply corresponding to the fault protection function," includes:

[0100] Adjust the voltage of the node corresponding to the fault protection function in the nuclear-grade uninterruptible power supply according to the preset adjustment interval.

[0101] Based on this, step 203 may include:

[0102] Detect whether the node voltage has reached the preset protection threshold;

[0103] When the node voltage does not reach the preset protection threshold, the process jumps to the step of adjusting the voltage of the node corresponding to the fault protection function in the nuclear-level uninterruptible power supply according to the preset adjustment interval, and continues until the node voltage reaches the preset protection threshold, at which point the current real-time node voltage is obtained.

[0104] Node voltage refers to the voltage value at the location corresponding to the fault protection function under test. Preset protection threshold refers to the overvoltage or undervoltage protection value corresponding to the fault protection function under test.

[0105] When testing the DC bus voltage overvoltage protection function, in the test mode corresponding to the DC bus voltage overvoltage protection function, the voltage value at the connection position between the second terminal of the rectifier module and the first terminal of the inverter module is gradually increased according to the preset adjustment interval until it rises to the overvoltage protection value corresponding to the DC bus voltage overvoltage protection function. Then, the real-time voltage value at the connection position between the second terminal of the rectifier module and the first terminal of the inverter module is obtained.

[0106] Alternatively, in the test mode corresponding to the DC bus voltage overvoltage protection function, the voltage value at the connection point between the second terminal of the rectifier module and the first terminal of the inverter module is gradually increased according to the preset adjustment interval. The real-time voltage value at the connection point between the second terminal of the rectifier module and the first terminal of the inverter module is monitored in real time until the real-time voltage value begins to remain constant or begins to decrease, at which point the current real-time voltage value is obtained.

[0107] When testing the DC bus voltage undervoltage protection function, in the test mode corresponding to the DC bus voltage undervoltage protection function, the voltage value at the connection position between the second terminal of the rectifier module and the first terminal of the inverter module is gradually reduced according to the preset adjustment interval until it is reduced to the undervoltage protection value corresponding to the DC bus voltage undervoltage protection function. Then, the real-time voltage value at the connection position between the second terminal of the rectifier module and the first terminal of the inverter module is obtained.

[0108] When testing the overvoltage protection function of the output inverter voltage, in the test mode corresponding to the overvoltage protection function of the output inverter voltage, gradually increase the voltage value of the second terminal of the inverter module according to the preset adjustment interval until it rises to the overvoltage protection value corresponding to the overvoltage protection function of the output inverter voltage, and then obtain the real-time voltage value of the second terminal of the inverter module.

[0109] Alternatively, in the test mode corresponding to the direct output inverter voltage overvoltage protection function, the voltage value at the second terminal of the inverter module is gradually increased according to the preset adjustment interval. The real-time voltage value at the second terminal of the inverter module is monitored in real time until it begins to remain constant or begins to decrease, at which point the current real-time voltage value is obtained.

[0110] When testing the undervoltage protection function of the output inverter voltage, in the test mode corresponding to the undervoltage protection function of the output inverter voltage, gradually reduce the voltage value of the second terminal of the inverter module according to the preset adjustment interval until it is reduced to the undervoltage protection value corresponding to the undervoltage protection function of the output inverter voltage, and then obtain the real-time voltage value of the second terminal of the inverter module.

[0111] When testing the AC voltage overvoltage protection function of the rectifier input, in the test mode corresponding to the AC voltage overvoltage protection function of the rectifier input, gradually increase the voltage value of the first terminal of the rectifier module according to the preset adjustment interval until it rises to the overvoltage protection value corresponding to the AC voltage overvoltage protection function of the rectifier input, and then obtain the real-time voltage value of the first terminal of the rectifier module.

[0112] Alternatively, in the test mode corresponding to the AC voltage overvoltage protection function of the rectifier input, the voltage value at the first terminal of the rectifier module is gradually increased according to the preset adjustment interval. The real-time voltage value at the first terminal of the rectifier module is monitored in real time until it begins to remain constant or begins to decrease, at which point the current real-time voltage value is obtained.

[0113] When testing the undervoltage protection function of the rectifier input AC voltage, in the test mode corresponding to the undervoltage protection function of the rectifier input AC voltage, the voltage value of the first terminal of the rectifier module is gradually reduced according to the preset adjustment interval until it is reduced to the undervoltage protection value corresponding to the undervoltage protection function of the rectifier input AC voltage, and the real-time voltage value of the first terminal of the rectifier module is obtained.

[0114] When testing the bypass voltage overvoltage protection function, in the test mode corresponding to the bypass voltage overvoltage protection function, gradually increase the voltage value at the connection position between the output terminal of the bypass voltage regulator module and the second terminal of the inverter module according to the preset adjustment interval, until it rises to the overvoltage protection value corresponding to the bypass voltage overvoltage protection function, and then obtain the real-time voltage value at the connection position between the output terminal of the bypass voltage regulator module and the second terminal of the inverter module.

[0115] Alternatively, in the test mode corresponding to the bypass voltage overvoltage protection function, the voltage value at the connection point between the output terminal of the bypass voltage regulator module and the second terminal of the inverter module is gradually increased according to the preset adjustment interval. The real-time voltage value at the connection point between the output terminal of the bypass voltage regulator module and the second terminal of the inverter module is monitored in real time until the real-time voltage value begins to remain constant or begins to decrease, at which point the current real-time voltage value is obtained.

[0116] When testing the bypass voltage undervoltage protection function, in the test mode corresponding to the bypass voltage undervoltage protection function, gradually reduce the voltage value at the connection position between the output terminal of the bypass voltage regulator module and the second terminal of the inverter module according to the preset adjustment interval, until it is reduced to the undervoltage protection value corresponding to the bypass voltage undervoltage protection function, and then obtain the real-time voltage value at the connection position between the output terminal of the bypass voltage regulator module and the second terminal of the inverter module.

[0117] Step 204: Based on the real-time node voltage and preset protection threshold, check whether the fault protection function of the nuclear-grade uninterruptible power supply is normal.

[0118] By comparing the real-time node voltage corresponding to the fault protection function under test with the preset protection threshold, it is possible to detect whether the fault protection function under test is normal.

[0119] In some embodiments, step 204 may include:

[0120] When the deviation between the real-time node voltage and the preset protection threshold is less than or equal to the preset deviation value, the fault protection function of the nuclear-grade uninterruptible power supply is determined to be normal.

[0121] For the DC bus voltage overvoltage protection function, when the absolute value of the difference between the real-time node voltage corresponding to the DC bus voltage overvoltage protection function obtained in step 203 and its corresponding overvoltage protection value is less than or equal to the preset deviation value, the DC bus voltage overvoltage protection function is determined to be normal; otherwise, the DC bus voltage overvoltage protection function is determined to be abnormal.

[0122] For the DC bus voltage undervoltage protection function, when the absolute value of the difference between the real-time node voltage corresponding to the DC bus voltage undervoltage protection function obtained in step 203 and its corresponding undervoltage protection value is less than or equal to the preset deviation value, the DC bus voltage undervoltage protection function is determined to be normal; otherwise, the DC bus voltage undervoltage protection function is determined to be abnormal.

[0123] The detection methods for other fault protection functions are the same as those described above, and will not be repeated in this embodiment. The preset deviation value here can be set by the user, and this embodiment does not impose specific limitations on it.

[0124] In some embodiments, when the test command is a one-click test command, after step 204, the method further includes:

[0125] Check whether the one-click test command also includes the fault protection function to be tested;

[0126] If the one-click test command also includes a fault protection function to be tested, jump to step 202 for execution and continue to execute subsequent steps until all fault protection functions to be tested in the one-click test command are detected.

[0127] During the one-click test, after each fault protection function to be tested is completed, the test command is checked to see if any other fault protection functions to be tested are still included. If the test command still includes other fault protection functions to be tested, the test proceeds to step 202 to continue testing until all fault protection functions to be tested have been tested, thus completing the one-click test.

[0128] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows:

[0129] By installing a control board and a monitoring board inside the nuclear-grade uninterruptible power supply (UPS), and switching the UPS to test mode based on the control board, the node voltages in the UPS are adjusted. The corresponding real-time node voltages are obtained based on the monitoring board. Thus, the fault protection function can be tested based on the real-time node voltages and preset protection thresholds. The entire fault protection function test process does not require an external test power supply and test circuit; it can be achieved solely through the control board and test board in the nuclear-grade UPS. This effectively simplifies the test process and improves test efficiency.

[0130] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0131] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0132] Figure 4 A schematic diagram of the structure of the nuclear-grade uninterruptible power supply online fault detection device provided in an embodiment of the present invention is shown. For ease of explanation, only the parts related to the embodiment of the present invention are shown, and are described in detail below:

[0133] like Figure 4 As shown, the nuclear-grade uninterruptible power supply online fault detection device 4 includes: a receiving module 41, an adjustment module 42, and a detection module 44.

[0134] Receiver module 41 is used to receive user test commands;

[0135] The adjustment module 42 is used to switch the nuclear-grade uninterruptible power supply to test mode based on test commands and adjust the node voltage in the nuclear-grade uninterruptible power supply.

[0136] The adjustment module 42 is also used to acquire the real-time node voltage; the real-time node voltage is the current voltage of the node monitored by the monitoring board after adjusting the node voltage.

[0137] The detection module 43 is used to detect whether the fault protection function of the nuclear-grade uninterruptible power supply is normal based on the real-time node voltage and the preset protection threshold.

[0138] In one possible implementation, when the test instruction is a single test instruction, the adjustment module 42 is used to switch the nuclear-level uninterruptible power supply to a test mode corresponding to the fault protection function included in the single test instruction.

[0139] The adjustment module 42 is also used to adjust the voltage of the node corresponding to the fault protection function in the nuclear-level uninterruptible power supply in test mode.

[0140] In one possible implementation, when the fault protection function is DC bus voltage overvoltage protection function or DC bus voltage undervoltage protection function, the adjustment module 42 is used to disconnect the output terminal of the nuclear-grade uninterruptible power supply and disconnect the energy storage module in the nuclear-grade uninterruptible power supply to obtain a nuclear-grade uninterruptible power supply in test mode.

[0141] The adjustment module 42 is also used to adjust the voltage value at the connection point between the second terminal of the rectifier module and the first terminal of the inverter module in the nuclear-grade uninterruptible power supply when the uninterruptible power supply is in test mode.

[0142] In one possible implementation, when the fault protection function is the output inverter voltage overvoltage protection function or the output inverter voltage undervoltage protection function, the adjustment module 42 is used to disconnect the output terminal of the nuclear-grade uninterruptible power supply and disconnect the second terminal of the inverter module in the nuclear-grade uninterruptible power supply to obtain the nuclear-grade uninterruptible power supply in test mode.

[0143] The adjustment module 42 is also used to adjust the voltage value at the second terminal of the inverter module for a nuclear-grade uninterruptible power supply in test mode.

[0144] In one possible implementation, when the fault protection function is the rectified input AC voltage overvoltage protection function or the rectified input AC voltage undervoltage protection function, the adjustment module 42 is used to disconnect the output terminal of the nuclear-grade uninterruptible power supply, disconnect the first terminal of the rectifier module in the nuclear-grade uninterruptible power supply, and set the rectifier module to reverse working mode to obtain the nuclear-grade uninterruptible power supply in test mode.

[0145] The adjustment module 42 is also used to adjust the voltage value at the first terminal of the rectifier module for a nuclear-grade uninterruptible power supply in test mode.

[0146] In one possible implementation, when the fault protection function is a bypass voltage overvoltage protection function or a bypass voltage undervoltage protection function, the adjustment module 42 is used to disconnect the output terminal of the nuclear-grade uninterruptible power supply, disconnect the input terminal of the bypass voltage regulator module in the nuclear-grade uninterruptible power supply, and connect the output terminal of the bypass voltage regulator module to the second terminal of the inverter module to obtain a nuclear-grade uninterruptible power supply in test mode.

[0147] The adjustment module 42 is also used to adjust the voltage value at the connection point between the output terminal of the bypass voltage regulator module and the first terminal of the inverter module for a nuclear-grade uninterruptible power supply in test mode.

[0148] In one possible implementation, the adjustment module 42 is used to adjust the voltage of the node corresponding to the fault protection function in the nuclear-level uninterruptible power supply according to a preset adjustment interval;

[0149] The adjustment module 42 is also used to detect whether the node voltage has reached the preset protection threshold.

[0150] The adjustment module 42 is also used to jump to the step of adjusting the voltage of the node corresponding to the fault protection function in the nuclear-level uninterruptible power supply according to the preset adjustment interval when the node voltage does not reach the preset protection threshold, and continue to execute until the node voltage reaches the preset protection threshold, and obtain the current real-time node voltage.

[0151] In one possible implementation, the adjustment module 42 is used to determine that the fault protection function of the nuclear-level uninterruptible power supply is normal when the deviation between the real-time node voltage and the preset protection threshold is less than or equal to the preset deviation value.

[0152] In one possible implementation, when the test command is a one-click test command, the detection module 43 is used to detect whether the one-click test command also includes the fault protection function to be tested.

[0153] The detection module 43 is also used to, when the one-click test instruction also includes the fault protection function to be tested, jump to the steps of switching the nuclear-level uninterruptible power supply to test mode and adjusting the node voltage in the nuclear-level uninterruptible power supply based on the test instruction, and continue to execute the subsequent steps until all the fault protection functions to be tested in the one-click test instruction are detected.

[0154] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows:

[0155] By incorporating a control board and monitoring board within the nuclear-grade uninterruptible power supply (UPS), and switching the UPS to test mode via the adjustment module 42, the node voltages within the UPS are adjusted, and the corresponding real-time node voltages are acquired. This allows the detection module 43 to determine the functionality of the fault protection function based on the real-time node voltages and preset protection thresholds. The entire fault protection function test process requires no external test power supply or test circuitry; it can be achieved solely through the control board and test board within the nuclear-grade UPS, effectively simplifying the testing process and improving testing efficiency.

[0156] Figure 5 This is a schematic diagram of the control board inside the nuclear-grade uninterruptible power supply provided in an embodiment of the present invention. Figure 5 As shown, the control board 5 in this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50. When the processor 50 executes the computer program 52, it implements the steps in the above embodiments of the online fault detection method for core-level uninterruptible power supplies, for example... Figure 2 Steps 201 to 204 are shown. Alternatively, when the processor 50 executes the computer program 52, it implements the functions of each module / unit in the above-described device embodiments, for example... Figure 4 The functions of modules 41 to 43 are shown.

[0157] For example, the computer program 52 can be divided into one or more modules / units, which are stored in the memory 51 and executed by the processor 50 to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 52 in the control board 5. For example, the computer program 52 can be divided into... Figure 4 The modules shown are 41 to 43.

[0158] The control board 5 may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will understand that... Figure 5 This is merely an example of control board 5 and does not constitute a limitation on control board 5. It may include more or fewer components than shown, or combine certain components, or different components. For example, the control board may also include input / output devices, network access devices, buses, etc.

[0159] The processor 50 may be a Central Processing Unit (CPU), or 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. A general-purpose processor may be a microprocessor or any conventional processor.

[0160] The memory 51 can be an internal storage unit of the control board 5, such as a hard disk or RAM of the control board 5. The memory 51 can also be an external storage device of the control board 5, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the control board 5. Furthermore, the memory 51 can include both internal storage units and external storage devices of the control board 5. The memory 51 is used to store the computer program and other programs and data required by the control board. The memory 51 can also be used to temporarily store data that has been output or will be output.

[0161] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0162] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0163] Those skilled in the art will 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, or a combination of computer software and electronic hardware. 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.

[0164] In the embodiments provided by this invention, it should be understood that the disclosed devices / control boards and methods can be implemented in other ways. For example, the device / control board embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0165] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0166] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0167] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the above embodiments of the online fault detection method for core uninterruptible power supplies. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for on-line failure detection of a nuclear class uninterruptible power supply, characterized in that, The application is applied to a control board in a nuclear-grade uninterruptible power supply, and the nuclear-grade uninterruptible power supply further comprises a monitoring board, and the control board is in communication connection with the monitoring board; the method comprises the following steps: receiving a test instruction of a user; based on the test instruction, switching the nuclear-grade uninterruptible power supply into a test mode and adjusting a node voltage in the nuclear-grade uninterruptible power supply; obtaining a real-time node voltage; the real-time node voltage is a current voltage of the node monitored by the monitoring board after the node voltage is adjusted; according to the real-time node voltage and a preset protection threshold, detecting whether a fault protection function of the nuclear-grade uninterruptible power supply is normal; when the test instruction is a single-item test instruction, the step of based on the test instruction, switching the nuclear-grade uninterruptible power supply into a test mode and adjusting a node voltage in the nuclear-grade uninterruptible power supply comprises the following steps: based on a fault protection function to be tested in the single-item test instruction, switching the nuclear-grade uninterruptible power supply into a test mode corresponding to the fault protection function; correspondingly adjusting a voltage of a node in the nuclear-grade uninterruptible power supply corresponding to the fault protection function in the test mode.

2. The online fault detection method of the nuclear-grade uninterruptible power supply according to claim 1, wherein when the fault protection function is a direct-current bus voltage overvoltage protection function or a direct-current bus voltage undervoltage protection function, the step of based on a fault protection function to be tested in the single-item test instruction, switching the nuclear-grade uninterruptible power supply into a test mode corresponding to the fault protection function comprises the following steps: cutting off an output end in the nuclear-grade uninterruptible power supply and cutting off an energy storage module in the nuclear-grade uninterruptible power supply, to obtain the nuclear-grade uninterruptible power supply in the test mode; the step of correspondingly adjusting a voltage of a node in the nuclear-grade uninterruptible power supply corresponding to the fault protection function in the test mode comprises the following step: for the nuclear-grade uninterruptible power supply in the test mode, adjusting a voltage value at a connection position of a second end of a rectifier module and a first end of an inverter module in the nuclear-grade uninterruptible power supply.

3. The online fault detection method of the nuclear-grade uninterruptible power supply according to claim 1, wherein when the fault protection function is an output inverter voltage overvoltage protection function or an output inverter voltage undervoltage protection function, the step of based on a fault protection function to be tested in the single-item test instruction, switching the nuclear-grade uninterruptible power supply into a test mode corresponding to the fault protection function comprises the following steps: cutting off an output end in the nuclear-grade uninterruptible power supply and cutting off a second end of an inverter module in the nuclear-grade uninterruptible power supply, to obtain the nuclear-grade uninterruptible power supply in the test mode; the step of correspondingly adjusting a voltage of a node in the nuclear-grade uninterruptible power supply corresponding to the fault protection function in the test mode comprises the following step: for the nuclear-grade uninterruptible power supply in the test mode, adjusting a voltage value of the second end of the inverter module.

4. The online fault detection method of the nuclear-grade uninterruptible power supply according to claim 1, wherein When the fault protection function is a rectified input alternating voltage overvoltage protection function or a rectified input alternating voltage undervoltage protection function, the method comprises: cutting off the output end in the nuclear-level uninterruptible power supply, cutting off the first end of the rectification module in the nuclear-level uninterruptible power supply, and setting the rectification module to a reverse working mode, to obtain the nuclear-level uninterruptible power supply in the test mode; in the test mode, corresponding to adjusting the voltage of the node in the nuclear-level uninterruptible power supply corresponding to the fault protection function, comprising: for the nuclear-level uninterruptible power supply in the test mode, adjusting the voltage value of the first end of the rectification module.

5. The online fault detection method for the nuclear-level uninterruptible power supply according to claim 1, wherein when the fault protection function is a bypass voltage overvoltage protection function or a bypass voltage undervoltage protection function, the method comprises: cutting off the output end in the nuclear-level uninterruptible power supply, cutting off the input end of the bypass voltage stabilizing module in the nuclear-level uninterruptible power supply, and connecting the output end of the bypass voltage stabilizing module to the second end of the inverter module, to obtain the nuclear-level uninterruptible power supply in the test mode; in the test mode, corresponding to adjusting the voltage of the node in the nuclear-level uninterruptible power supply corresponding to the fault protection function, comprising: for the nuclear-level uninterruptible power supply in the test mode, adjusting the voltage value at the connection position between the output end of the bypass voltage stabilizing module and the first end of the inverter module.

6. The nuclear-class uninterruptible power supply on-line fault detection method of claim 1, wherein, corresponding to adjusting the voltage of the node in the nuclear-level uninterruptible power supply corresponding to the fault protection function, comprising: adjusting the voltage of the node in the nuclear-level uninterruptible power supply corresponding to the fault protection function according to a preset adjustment interval; the method of obtaining the real-time node voltage, comprising: detecting whether the node voltage reaches the preset protection threshold value; when the node voltage does not reach the preset protection threshold value, jumping to the step of adjusting the voltage of the node in the nuclear-level uninterruptible power supply corresponding to the fault protection function according to a preset adjustment interval, until the node voltage reaches the preset protection threshold value, to obtain the current real-time node voltage.

7. The online fault detection method for the nuclear-level uninterruptible power supply according to claim 1, wherein when the test instruction is a one-key test instruction, after the step of detecting whether the fault protection function of the nuclear-level uninterruptible power supply is normal according to the real-time node voltage and the preset protection threshold value, comprising: detecting whether the one-key test instruction further includes a fault protection function to be tested; When the one-key test instruction further comprises a fault protection function to be tested, the step of switching the core-level uninterruptible power supply into a test mode and adjusting the node voltage in the core-level uninterruptible power supply based on the test instruction is executed, and subsequent steps are continuously executed until all the fault protection functions to be tested in the one-key test instruction are detected.

8. The nuclear-class uninterruptible power supply on-line fault detection method according to any one of claims 1-7, characterized in that, According to the real-time node voltage and the preset protection threshold, whether the fault protection function of the core-level uninterruptible power supply is normal is detected, comprising: When the deviation value between the real-time node voltage and the preset protection threshold is less than or equal to a preset deviation value, it is determined that the fault protection function of the core-level uninterruptible power supply is normal.

9. A nuclear grade uninterruptible power supply comprising a control board, a monitoring board, a rectifier module, an inverter module, a bypass voltage stabilization module and an energy storage module, characterized in that, The control board is used to implement the steps of the online fault detection method of the core-level uninterruptible power supply according to any one of claims 1 to 8.

Images