Fault simulation device in power control system and power control system

Abstract

The disclosure provides a fault simulation device in a power control system and the power control system. The fault simulation device comprises a fault source module and a fault switching module; the fault switching module is electrically connected with the fault source module; the fault switching module is also electrically connected with a first external device and a second external device; the fault source module is electrically connected with the second external device; the first external device is used to send an operation signal of a to-be-tested module to the fault switching module; the second external device is used to generate a first control instruction and a second control instruction; the fault switching module is used to switch a first number of operation signals into the fault source module according to the first control instruction; and the fault source module is used to simulate the first number of operation signals into corresponding simulated fault signals according to the second control instruction. In this way, the first number of operation signals can be converted into simulated fault signals at the same time, thereby accelerating the troubleshooting efficiency of the operation and maintenance personnel.

Description

Technical Field

[0001] This disclosure relates to the field of intelligent control, and in particular to a fault simulation device in a power control system and a power control system. Background Technology

[0002] Power control systems contain numerous input / output signals. During daily operation, due to factors such as equipment aging, environmental interference, and human error, some input / output signals inevitably malfunction, leading to instability in the power control system. In reality, maintenance personnel must painstakingly sift through the vast number of input / output signals to pinpoint the cause of the malfunction, a process that is not only time-consuming and labor-intensive but also requires significant resources. Summary of the Invention

[0003] The technical problem to be solved by this disclosure is to overcome the shortcomings of the prior art, which requires maintenance personnel to check each actual fault signal one by one to determine which input / output signal caused the fault. This not only consumes a lot of time and energy, but also requires a lot of manpower and material resources. The disclosure provides a fault simulation device and a power control system in a power control system.

[0004] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0005] In a first aspect, a fault simulation device for a power control system is provided, the fault simulation device including a fault source module and a fault switching module;

[0006] The fault switching module is electrically connected to the fault source module;

[0007] The fault switching module is also electrically connected to the first external device and the second external device.

[0008] The fault source module is electrically connected to the second external device;

[0009] The first external device is used to send the operating signal of the module under test to the fault switching module;

[0010] The second external device is used to generate the first control command and the second control command;

[0011] The fault switching module is used to switch a first number of the operating signals to the fault source module according to the first control command sent by the second external device;

[0012] The fault source module is used to simulate the first number of operating signals into corresponding simulated fault signals according to the second control command.

[0013] Optionally, the first number of operating signals refers to all operating signals sent by the first external device to the fault switching module;

[0014] Alternatively, the first number of operating signals are those among all operating signals whose similarity to the actual fault signal of the module under test is greater than or equal to a similarity threshold.

[0015] Optionally, the fault source module includes a second number of combined path units; each combined path unit includes two adjacent first path units; a first switch is provided at several first preset positions between the two adjacent first path units, and a second switch is provided at several second preset positions on each first path unit;

[0016] The fault source module controls the operating state of the first switch and / or the second switch according to the second control command sent by the second external device, so as to simulate the first number of operating signals into the corresponding simulated fault signals.

[0017] Optionally, a first resistor is provided at several third preset positions between two adjacent first path units, and a second resistor is provided at several fourth preset positions on each first path unit;

[0018] The fault source module also controls the operating state of the first resistor and / or the second resistor according to the second control command sent by the second external device, so as to simulate the first number of operating signals into the corresponding simulated fault signals.

[0019] Optionally, an adder and an interference component are further provided at the fifth preset position on each of the first path units;

[0020] The interference component is used to generate interference signals;

[0021] The fault source module also injects the interference signal into the first number of operating signals through the adder according to the second control command sent by the second external device, so as to simulate the first number of operating signals into the corresponding simulated fault signal.

[0022] Optionally, each of the pathways is provided with an isolation unit to isolate the first pathway units from each other.

[0023] Optionally, the fault switching module has a plurality of second path units; each of the second path units is provided with a third switch at a plurality of fifth preset positions;

[0024] The fault switching module is used to control the working state of the third switch according to the first control command sent by the second external device, so as to switch the first number of the running signals to the fault source module.

[0025] Optionally, the first switch and / or the second switch and / or the third switch are all relay switches.

[0026] Secondly, a power control system is provided, the power control system including the fault simulation device, the first external device and the second external device in the power control system described above; the fault simulation device includes a fault source module and a fault switching module;

[0027] The fault switching module is electrically connected to the fault source module;

[0028] The fault switching module is also electrically connected to the first external device and the second external device.

[0029] The fault source module is electrically connected to the second external device;

[0030] The first external device is used to send the operating signal of the module under test to the fault switching module;

[0031] The second external device is used to generate a first control command, a second control command, and a third control command;

[0032] The fault switching module is used to switch a first number of the operating signals to the fault source module according to the first control command sent by the second external device.

[0033] The fault source module is used to simulate the first number of operating signals into corresponding simulated fault signals according to the second control command sent by the second external device, and send them to the module under test through the fault switching module.

[0034] The module under test is used to send the first number of simulated fault signals and real fault signals to the second external device according to the third control command sent by the second external device;

[0035] The second external device compares the first number of simulated fault signals with the real fault signals to determine the target simulated fault signal.

[0036] Optionally, the power control system further includes a first terminal block and a second terminal block;

[0037] The first terminal block is electrically connected to the first external device and the fault switching module;

[0038] The second terminal block is electrically connected to the module under test and the fault switching module;

[0039] The first external device sends the operating signal of the module under test to the fault switching module through the first terminal block;

[0040] The module under test receives the first number of simulated fault signals sent by the fault switching module via the second terminal block.

[0041] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0042] The positive and progressive effects of this disclosure are as follows: the fault switching module switches a first number of operating signals to the fault source module according to a first control instruction; and the fault source module simulates the first number of operating signals into corresponding simulated fault signals according to a second control instruction. This allows the first number of operating signals to be converted into simulated fault signals simultaneously, thereby eliminating the need for maintenance personnel to troubleshoot from a large number of input / output signals one by one. This not only saves maintenance personnel a significant amount of time and effort but also accelerates their troubleshooting efficiency. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of a fault simulation device in a power control system provided in Embodiment 1 of this disclosure;

[0044] Figure 2 A schematic diagram of a portion of the first path unit in the fault source module of a fault simulation device in a power control system provided in Embodiment 1 of this disclosure;

[0045] Figure 3 This is a first schematic diagram of the second path unit in the fault switching module of a fault simulation device in a power control system provided in Embodiment 1 of this disclosure;

[0046] Figure 4 This is a second schematic diagram of the second path unit in the fault switching module of a fault simulation device in a power control system provided in Embodiment 1 of this disclosure;

[0047] Figure 5 This is a schematic diagram of a fault source card in a fault source module of a fault simulation device in a power control system provided in Embodiment 1 of this disclosure;

[0048] Figure 6 A schematic diagram of a fault switching card placed in a fault switching module in a fault simulation device in a power control system provided in Embodiment 1 of this disclosure;

[0049] Figure 7This is a schematic diagram of a fault switching card in a fault simulation device for a power control system provided in Embodiment 1 of this disclosure;

[0050] Figure 8 This is a schematic diagram of a power control system provided in Embodiment 2 of this disclosure. Detailed Implementation

[0051] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0052] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the context of the embodiments, and the use of such prefixes should not constitute unnecessary restrictions. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0053] Example 1

[0054] To accelerate the troubleshooting efficiency of maintenance personnel, Embodiment 1 of the present invention provides a fault simulation device in a power control system. Figure 1 This is a schematic diagram of a fault simulation device in a power control system according to Embodiment 1 of this disclosure. Preferably, the fault simulation device 10 in the power control system is applied in a hardware-in-the-loop power control system. The fault simulation device 10 in the power control system includes a fault switching module 11 and a fault source module 12. The fault simulation device 10 in the power control system may include multiple fault switching modules 11 and multiple fault source modules 12 to process the operating signals of more modules under test.

[0055] The fault switching module 11 is electrically connected to the fault source module 12; the fault switching module 11 is also electrically connected to the first external device and the second external device; the fault source module 12 is electrically connected to the second external device.

[0056] The first external device is used to send the operating signal of the module under test to the fault switching module 11; the second external device is used to generate the first control command and the second control command; the fault switching module 11 is used to switch the first number of operating signals to the fault source module 12 according to the first control command; the fault source module 12 is used to simulate the first number of operating signals into the corresponding simulated fault signal according to the second control command.

[0057] The second external device can be controlled via RS485 serial port, and the communication protocol is MODBUS, which is a serial communication protocol.

[0058] The fault simulation device in this power control system can automatically detect the status after power-on, displaying green for normal status and red for fault status.

[0059] The fault source module 12 is powered by 24 volts.

[0060] In this embodiment, the fault switching module switches a first number of operating signals to the fault source module according to a first control command; and the fault source module simulates the first number of operating signals into corresponding simulated fault signals according to a second control command. This allows for the simultaneous conversion of the first number of operating signals into simulated fault signals, eliminating the need for maintenance personnel to manually check numerous input / output signals one by one. This not only saves maintenance personnel significant time and effort but also accelerates their troubleshooting efficiency. Furthermore, by combining multiple hardware modules under the control of a second external device, it enables the simultaneous generation of multiple signal faults and multiple types of faults. Each operating signal can be superimposed with a fault signal. Through the integration of multiple fault source modules and multiple fault switching modules, it can accommodate at least 400 operating signals for fault injection, more realistically reproducing possible fault situations in actual operation. This helps to gain a deeper understanding of the operating characteristics and performance of the power control system under complex fault conditions.

[0061] In one embodiment, the first number of operating signals is all operating signals sent by the first external device to the fault switching module 11; or the first number of operating signals is the signal among all operating signals whose similarity to the actual fault signal of the module under test is greater than or equal to a similarity threshold.

[0062] For example, if a module under test requires 400 operating signals to operate normally, then the first number of operating signals is all the operating signals sent by the first external device to the fault switching module 11, which is the 400 signals.

[0063] Before troubleshooting the signals, maintenance personnel can use a simulator to verify the signals whose similarity to the actual fault signal of the module under test is greater than or equal to the similarity threshold. Assuming there are 64 similar signals, the first number of operating signals mentioned above are the 64 similar signals among all operating signals whose similarity to the actual fault signal of the module under test is greater than or equal to the similarity threshold.

[0064] In this embodiment, by switching the first number of operating signals to the fault switching module 11, the fault switching module 11 can process the first number of operating signals more comprehensively, preventing missed processing that would lead to undetected signals. Only inputting signals from all operating signals whose similarity to the actual fault signal of the module under test is greater than or equal to the similarity threshold to the fault switching module 11 can reduce unnecessary signal processing by the fault switching module 11, thereby speeding up the processing speed of the fault switching module 11.

[0065] In one embodiment, the fault source module 12 includes a second number of combined path units; each combined path unit includes two adjacent first path units; a first switch is provided at several first preset positions between the two adjacent first path units, and a second switch is provided at several second preset positions on each first path unit.

[0066] Each channel unit is designed to be non-polarized, and its input / output interfaces are jack-type, allowing the insertion of banana plugs. Preferably, the voltage of each channel unit is set to 55 volts, and the current of each channel unit is set to 1 amp. All first and second switches are programmable switches.

[0067] The fault source module 12 controls the working state of the first switch and / or the second switch according to the second control command, so as to simulate the first number of operating signals into corresponding simulated fault signals.

[0068] In this embodiment, the fault source module 12 can quickly simulate the first number of operating signals into corresponding simulated fault signals by controlling the working state of the first switch and / or the second switch according to the second control command. This is faster than manual setting and can thus simulate the first number of operating signals into simulated fault signals more efficiently.

[0069] In one embodiment, a first resistor is provided at several third preset positions between two adjacent first path units, and a second resistor is provided at several fourth preset positions on each first path unit;

[0070] The fault source module 12 also controls the operating state of the first resistor and / or the second resistor according to the second control command, so as to simulate the first number of operating signals into corresponding simulated fault signals.

[0071] Preferably, the adjustment range of the first resistor and the second resistor is 0 to 3 megohms; the step size for each resistor adjustment is 1 ohm.

[0072] In this embodiment, the fault source module 12 can quickly simulate the first number of operating signals into corresponding simulated fault signals by adjusting the working state of the first resistor and / or the second resistor according to the second control command. This is faster than manual setting and can thus simulate the first number of operating signals into simulated fault signals more efficiently.

[0073] In one embodiment, an adder and an interference component are further provided at the fifth preset position on each first path unit; the interference component is used to generate an interference signal.

[0074] Each of the first-path units supports the function of injecting interference signals. The waveform of the interference signal can be at least one of sine wave, square wave, triangle wave, white noise, and glitches. The amplitude range of the interference signal is 0 to 4.5 volts, and the frequency range is 1 Hz to 200 kHz.

[0075] The fault source module 12 also injects the interference signal into the first number of operating signals through an adder according to the second control command, so as to simulate the first number of operating signals into the corresponding simulated fault signal.

[0076] In this embodiment, since normal operating signals are also subject to interference signals during operation, adding some interference signals during the simulation of fault signals can make the simulated fault signals more realistic, thereby making the subsequent comparison results with real fault signals more accurate.

[0077] In one embodiment, an isolation unit is provided between each path to isolate the first path units from each other.

[0078] Preferably, the isolation unit can be a ground wire. Its external grounding port is in the form of a plug.

[0079] In this embodiment, a ground wire is used to isolate all the first path units from each other, which can prevent short circuits from occurring when the output is grounded.

[0080] In one embodiment, Figure 2 This is a schematic diagram of a portion of the first path unit in the fault source module of a fault simulation device in a power control system provided in Embodiment 1 of this disclosure. (In conjunction with...) Figure 2 This further explains how the fault simulation device converts operating signals into analog signals.

[0081] Input running signals ( Figure 2 The analog fault signals (CH1 IN+ and CH1-, CH2 IN+ and CH2-, CH3 IN+ and CH3-, CH4 IN+ and CH4-) in the output are related to the corresponding analog fault signals. Figure 2The pathways between CH1 OUT+ and CH1-, CH2 OUT+ and CH2-, CH3 OUT+ and CH3-, and CH4 OUT+ and CH4- in the above-mentioned first pathway units, and the combined pathway unit includes two adjacent first pathway units.

[0082] Figure 2 Switches K11 to K49 are the first switches mentioned above; Figure 2 Switches K1A to K3A and switches K1B to K3B are the second switches mentioned above; Figure 2 The resistors R1 to R4 in the above are the first resistors mentioned above; Figure 2 The resistors R5 to R6 are the second resistors mentioned above; Figure 2 The resistors R7 to R14 in the diagram are external resistors; Figure 2 X1 to X4 in the above are the adders; Figure 2 M1 to M4 are the interference components mentioned above. Figure 2 GND1 to GND3 are ground interfaces.

[0083] Taking a combined circuit unit consisting of CH1 IN+ and CH1-, CH2 IN+ and CH2-, CH1 OUT+ and CH1-, and CH2 OUT+ and CH2- as an example, the initial state is that all switches are in the open state. The host computer (the second external device mentioned above) uses its RS485 serial port to control the corresponding switches, resistors, adders, and interference components to form corresponding fault types. For example:

[0084] 1) Disconnecting switch K12 will disconnect CH1IN+ and CH1-, thereby breaking the first circuit unit consisting of CH1IN+ and CH1-, CH1OUT+ and CH1-.

[0085] 2) Close switches K1 and / K15 to short-circuit CH1IN+ and CH1- before the output, so that the first path unit consisting of CH1IN+ and CH1-, CH1OUT+ and CH1- is short-circuited;

[0086] 3) Close switch K1A to bridge CH1- and CH2-; close switch K1B to bridge CH1IN+ and CH2IN+, and bridge the two first path units in the combined path unit formed by CH1IN+ and CH1-, CH2IN+ and CH2-, CH1OUT+ and CH1-, and CH2OUT+ and CH2-.

[0087] 4) Connect GND1 to the ground and close switch K13 / K14 to form a short circuit between CH1 and the ground;

[0088] 5) Connect 24VCH1 to a 24V power supply, close switch K11 to form a short circuit between CH1 and the power supply;

[0089] 6) By adjusting the resistance, input impedance can be generated in the circuit;

[0090] 7) Control the adder and interference module to superimpose signals such as sine waves, square waves, triangle waves, white noise and glitches into the circuit.

[0091] In one embodiment, the fault switching module 11 has a plurality of second path units; each second path unit is provided with a third switch at a plurality of fifth preset positions;

[0092] The fault switching module 11 is used to control the working state of the third switch according to the first control command, so as to switch the first number of running signals to the fault source module 12.

[0093] Furthermore, the fault switching module 11 includes a combination of a controller card and fault switching cards. In a normal, fault-free state, the operating signals of the I / O system (first external device) are directly injected into the object under test (DUT) via quick connectors; or, signals received from the DUT in real-time output are injected into the I / O system via quick connectors. In a fault state, under controlled conditions, a converted electrical signal is superimposed or replaced with an electrical signal carrying a real fault and injected into the DUT; or, the received real-time output electrical signal is converted into a faulty digital quantity and injected into the I / O system. The fault switching module 11 may include one controller card and 12 fault switching cards, the placement of which is as follows: Figure 6 The schematic diagram of the fault switching card is shown in the dashed box in the middle. Figure 7 As shown, the control card communicates with the host computer (the first external device) via TCP and with the fault switching card via RS-485 serial communication. Each second path unit has an indicator light for feedback. A green light is constantly on when the signal in the second path unit is normal, and a yellow or red light illuminates when switching to fault source module 12 (where the yellow or red light indicates which combination path unit in fault source module 12 has been switched to). This indicates to the tester the current test path switching status.

[0094] In this embodiment, the fault switching module 11 can quickly switch the first number of operating signals to the fault source module 12 by controlling the working state of the third switch according to the first control command. This is faster than manual setting and can switch the first number of operating signals to the fault source module 12 more efficiently.

[0095] In one embodiment, Figure 3 This is a first schematic diagram of the second path unit in the fault switching module of a fault simulation device in a power control system according to Embodiment 1 of this disclosure; combined with Figure 3 This describes the switching process when there is only one fault source card in a single fault source module. It should be noted that a fault source module can have multiple fault source cards, and each fault source card can simulate the required fault signal.

[0096] Figure 3 Switches KA1 to KA4, as well as KA31 and KA32, are all the third switches mentioned above.

[0097] When only the first fault source card F1 exists, each second path unit is controlled by two relay switches. Figure 4 The second path unit, consisting of CH1-IN and CH1-OUT, allows KA1 to select whether to connect to the first fault source card F1 when KA2 is switched while KA1 is closed. It should be noted that the first fault source card F1 is only allowed to connect to one second path unit.

[0098] In one embodiment, Figure 4 This is a second schematic diagram of the second path unit in the fault switching module of a fault simulation device in a power control system according to Embodiment 1 of this disclosure; combined with Figure 4 This describes the switching process when there are multiple faulty source cards.

[0099] Figure 4 Switches KA1, KA3, KA33, and KA34 are all the third switches mentioned above.

[0100] When there are two faulty source cards, namely the first faulty source card F1 and the first faulty source card F2, Figure 4 The second path unit, consisting of CH1-IN and CH1-OUT, is connected to the first fault source card F1 and the first fault source card F2 through two sets of relay switches. By controlling the opening and closing of the relay switches, the specific fault injection source card to be connected can be selected. The signal is not allowed to flow back and affect the accuracy of the test by disconnecting the relay at the back end of the fault injection source card.

[0101] In one embodiment, Figure 5 This is a schematic diagram of a fault source card in a fault source module of a fault simulation device in a power control system provided in Embodiment 1 of this disclosure.

[0102] The faulty source card is 30cm long and 20cm wide, with an external output port on one end and a 55V voltage output port on the other.

[0103] It should be noted that the first, second, third, fourth, and fifth preset positions mentioned above can all be set according to the actual situation.

[0104] In one embodiment, the first switch and / or the second switch and / or the third switch are all relay switches.

[0105] In this embodiment, the mechanical switching action of the relay can more realistically simulate faults such as open circuit, poor contact, and short circuit, and it is completely insulated when disconnected, thereby avoiding the influence of the tiny leakage current of the switch on the realism of the simulated fault signal.

[0106] Example 2

[0107] Corresponding to the aforementioned embodiments of the fault simulation device in the power control system, this disclosure also provides embodiments of the power control system. Figure 8 This is a schematic diagram of a power control system provided in Embodiment 1 of the present disclosure; the power control system includes a fault simulation device, a first external device, and a second external device in the power control system of Embodiment 1; the fault simulation device includes a fault source module and a fault switching module;

[0108] The fault switching module 11 is electrically connected to the fault source module 12; the fault switching module 11 is also electrically connected to the first external device 21 and the second external device 23; the fault source module 12 is electrically connected to the second external device 23; the first external device 21 is used to send the operation signal of the module under test 22 to the fault switching module 11;

[0109] The second external device 23 is used to generate a first control command, a second control command, and a third control command; the fault switching module 11 is used to switch a first number of operating signals to the fault source module 12 according to the first control command; the fault source module 12 is used to simulate the first number of operating signals into corresponding simulated fault signals according to the second control command, and send them to the module under test 22 through the fault switching module 11; the module under test 22 is used to send the first number of simulated fault signals and real fault signals to the second external device 23 according to the third control command; the second external device 23 compares the first number of simulated fault signals with the real fault signals to determine the target simulated fault signal.

[0110] In this embodiment, the fault switching module 11 switches a first number of operating signals to the fault source module 12 according to a first control command; and the fault source module 12 simulates the first number of operating signals into corresponding simulated fault signals according to a second control command. The target simulated fault signal can be determined by comparing the first number of simulated fault signals with the real fault signals. In this way, the first number of operating signals can be converted into simulated fault signals simultaneously, thereby eliminating the need for maintenance personnel to check each of the numerous input / output signals one by one. This not only saves maintenance personnel a lot of time and energy but also speeds up their troubleshooting efficiency.

[0111] In one embodiment, the power control system further includes a first terminal block and a second terminal block;

[0112] The first terminal block is electrically connected to the first external device 21 and the fault switching module 11; the second terminal block is electrically connected to the module under test 22 and the fault switching module 11.

[0113] The first external device 21 sends the operating signal of the module under test 22 to the fault switching module 11 through the first terminal block; the module under test 22 receives the first number of simulated fault signals sent by the fault switching module 11 through the second terminal block.

[0114] Both the first and second terminal blocks have two interfaces, one input and one output. The interface between the first terminal block and the fault switching module 11 is a 37pi female connector, and the port connecting to the input / output system (first external system) is a green-headed terminal block. The interface between the second terminal block and the fault switching module 11 is a 37pi female connector, and the port connecting to the module under test 22 is a green-headed terminal block.

[0115] Using different wire harnesses and terminal blocks of different colors for different operating signals helps testers distinguish the corresponding signal types during large-scale point testing and also facilitates wiring.

[0116] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A fault simulation device in a power control system, characterized in that, The fault simulation device includes a fault source module and a fault switching module; The fault switching module is electrically connected to the fault source module; The fault switching module is also electrically connected to the first external device and the second external device. The fault source module is electrically connected to the second external device; The first external device is used to send the operating signal of the module under test to the fault switching module; The second external device is used to generate the first control command and the second control command; The fault switching module is used to switch a first number of the operating signals to the fault source module according to the first control command sent by the second external device; The fault source module is used to simulate the first number of operating signals into corresponding simulated fault signals according to the second control command sent by the second external device.

2. The fault simulation device as described in claim 1, characterized in that, The first number of operating signals refers to all operating signals sent by the first external device to the fault switching module; Alternatively, the first number of operating signals are signals among all operating signals whose similarity to the actual fault signal of the module under test is greater than or equal to a similarity threshold.

3. The fault simulation device as described in claim 1, characterized in that, The fault source module includes a second number of combined path units; each combined path unit includes two adjacent first path units; a first switch is provided at several first preset positions between the two adjacent first path units, and a second switch is provided at several second preset positions on each first path unit; The fault source module controls the operating state of the first switch and / or the second switch according to the second control command sent by the second external device, so as to simulate the first number of operating signals into the corresponding simulated fault signals.

4. The fault simulation device as described in claim 3, characterized in that, A first resistor is provided at several third preset positions between two adjacent first path units, and a second resistor is provided at several fourth preset positions on each first path unit. The fault source module also controls the operating state of the first resistor and / or the second resistor according to the second control command sent by the second external device, so as to simulate the first number of operating signals into the corresponding simulated fault signals.

5. The fault simulation device as described in claim 3, characterized in that, An adder and an interference component are also provided at the fifth preset position on each of the first path units; The interference component is used to generate interference signals; The fault source module also injects the interference signal into the first number of operating signals through the adder according to the second control command sent by the second external device, so as to simulate the first number of operating signals into the corresponding simulated fault signal.

6. The fault simulation device as described in claim 3, characterized in that, Each of the first path units is provided with an isolation unit to isolate the first path units from each other.

7. The fault simulation device as described in claim 3, characterized in that, The fault switching module includes several second path units; each of the second path units has a third switch at several fifth preset positions; The fault switching module is used to control the working state of the third switch according to the first control command sent by the second external device, so as to switch the first number of the running signals to the fault source module.

8. The fault simulation device as described in claim 7, characterized in that, The first switch and / or the second switch and / or the third switch include relay switches.

9. A power control system, characterized in that, The power control system includes a fault simulation device as described in any one of claims 1 to 8, as well as a first external device and a second external device; the fault simulation device includes a fault source module and a fault switching module; The first external device is used to send the operating signal of the module under test to the fault switching module; The second external device is used to generate a first control command, a second control command, and a third control command; The fault switching module is used to switch a first number of the operating signals to the fault source module according to the first control command sent by the second external device; The fault source module is used to simulate the first number of operating signals into corresponding simulated fault signals according to the second control command sent by the second external device, and send them to the module under test through the fault switching module; The module under test is used to send the first number of simulated fault signals and real fault signals to the second external device according to the third control command sent by the second external device; The second external device compares the first number of simulated fault signals with the real fault signals to determine the target simulated fault signal.

10. The power control system of claim 9, further comprising a first terminal block and a second terminal block; The first terminal block is electrically connected to the first external device and the fault switching module; The second terminal block is electrically connected to the module under test and the fault switching module; The first external device sends the operating signal of the module under test to the fault switching module through the first terminal block; The module under test receives the first number of simulated fault signals sent by the fault switching module through the second terminal block.

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