New verification system and method for busbar automatic switching microcomputer protection device of power supply system

Abstract

The present invention discloses a novel calibration system and method for a microcomputer protection device for a main-coupled automatic switching power supply system. A BZT-specific calibration control box is designed to replace the 1# and 2# incoming line switch operating signals required for calibrating the BZT protection action logic, as well as the BZT reliable action tripping of the 1# and 2# incoming line switches. This method divides the calibration of the device into two parts: a logic calibration part and a linkage calibration part. A dedicated calibration control box is used to simulate an operating circuit breaker to perform an action logic calibration to verify the correctness of the device's action logic. After completing the logic calibration, a linkage calibration is performed when the production device allows, thereby ensuring the integrity and correctness of the calibration of the entire set of automatic switching power supply devices. The BZT-specific calibration control box independently designed by the present invention has a simple structure, low manufacturing cost, and a concise and easy-to-understand electrical control principle. When calibrating the BZT, it will not affect the operating production equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of calibration of a busbar standby automatic switching microcomputer protection device in a power supply system, and in particular to a novel calibration system and method for a busbar standby automatic switching microcomputer protection device in a power supply system. Background Art

[0002] The current power supply system uses a manual simulation method for periodic calibration of the busbar backup automatic transfer microcomputer protection device (hereinafter referred to as "BZT"). This involves manually switching the incoming line switch of section I after all the loads from busbar section I are transferred to busbar section II. The system then manually switches the incoming line switch of section I to verify that the BZT reliably operates to close the busbar tie breaker. After normal operation is restored, the loads from busbar section II are fully transferred to busbar section I, and the incoming line switch of section II is manually switched to verify that the BZT reliably operates to close the busbar tie breaker. This calibration method requires coordination between process personnel and electrical instrumentation personnel, resulting in a cumbersome and time-consuming process. It also poses significant safety risks during the process of transferring loads. Furthermore, due to limited on-site conditions, the BZT's protective action logic cannot be fully and accurately verified. Summary of the Invention

[0003] In view of the problems and shortcomings of the prior art, the present invention provides a novel calibration system and method for a microcomputer protection device for a busbar backup automatic switching in a power supply system.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides a novel calibration system for a busbar standby automatic switching microcomputer protection device of a power supply system. The system is characterized in that it comprises a BZT-specific calibration control box and a relay protection calibrator. The BZT-specific calibration control box comprises a stop control button SB1, a start control button SB2, a stop control button SB3, a start control button SB4, an intermediate relay 1DL, an intermediate relay 2DL, an intermediate relay 1DL', and an intermediate relay 2DL'; an external power supply is connected in series to the stop control button SB1, the start control button SB2, the normally closed switch of the intermediate relay 1DL', and the coil of the intermediate relay 1DL through an air switch; the start control button SB2 is connected in parallel to the normally open switch of the intermediate relay 1DL; the external power supply is connected in series to the stop control button SB3, the start control button SB4, the normally closed switch of the intermediate relay 2DL', and the coil of the intermediate relay 2DL through an air switch; and the start control button SB4 is connected in parallel to the normally open switch of the intermediate relay 2DL;

[0006] Press the start control buttons SB2 and SB4, the coils of the intermediate relays 1DL and 2DL are energized, the status of the intermediate relays 1DL and 2DL are input into the busbar standby automatic transfer microcomputer protection device, and the other analog quantities input into the device by the relay protection calibrator provide corresponding conditions for the device. After waiting for the set time delay, it is judged whether the device is fully charged based on whether the charging indicator of the device is on. If the charging indicator is on, charging is completed. Then, press the stop control button SB1, the coil of the intermediate relay 1DL is de-energized, and it is judged whether the charging indicator of the device is off. If it is off, the device is normal. If it is not off, the device is faulty. If the charging indicator is not on, the device is faulty.

[0007] Press the start control button SB2, the coil of the intermediate relay 1DL is energized, and after waiting for the set time delay, it is judged whether the device has completed charging based on whether the charging indicator light is on. If the charging indicator light is on, charging is completed. Then press the stop control button SB3, the coil of the intermediate relay 2DL is de-energized, and it is judged whether the charging indicator light is off. If it is off, the device is normal, and if it is not off, the device has a fault. If the charging indicator light is not on, the device has a fault. This can be repeated to verify each charging condition of the device.

[0008] Preferably, the BZT dedicated calibration control box further includes a simulated jump 1# incoming line switch and a simulated jump 2# incoming line switch, the external power supply is connected to the series-connected simulated jump 1# incoming line switch and the coil of the intermediate relay 1DL' through an air switch, the external power supply is connected to the series-connected simulated jump 2# incoming line switch and the coil of the intermediate relay 2DL' through an air switch, the trip signal of the 1# incoming line switch of the bus tie standby automatic transfer microcomputer protection device is connected to the simulated jump 1# incoming line switch, and the trip signal of the 2# incoming line switch of the bus tie standby automatic transfer microcomputer protection device is connected to the simulated jump 2# incoming line switch;

[0009] After the charging logic verification of the device is completed, the charging conditions required by the device are restored to complete the charging of the device. The relay protection tester then provides the device with no voltage on bus 1 and no current on incoming line 1. After a delay, the device sends a trip 1DL signal to simulate the tripping of incoming line switch 1#, energizing the coil of intermediate relay 1DL' and disconnecting the normally closed switch of intermediate relay 1DL'. The coil of intermediate relay 1DL loses power, and the device sends a trip signal to high-voltage bus tie circuit breaker 3DL. The device closes the high-voltage circuit breaker 3DL on it and determines whether the high-voltage circuit breaker 3DL is indeed closed. If it is indeed closed, it indicates that the protection action logic of the device is complete and correct. If it is not closed, it indicates that the device has a fault.

[0010] The relay protection calibrator then provides the device with analog conditions such as no voltage on bus II and no current on line 2#. After a delay, the device sends a 2DL trip signal to the simulated 2DL trip switch, energizing the coil of the intermediate relay 2DL' and disconnecting the normally closed switch of the intermediate relay 2DL'. The coil of the intermediate relay 2DL loses power, and the device closes the high-voltage bus tie circuit breaker 3DL on it to determine whether the high-voltage bus tie circuit breaker 3DL is actually closed. If it is actually closed, it indicates that the protection action logic of the device is complete and correct. If it is not closed, it indicates that the device has a fault.

[0011] The present invention also provides a novel calibration method for a power supply system busbar standby automatic switching microcomputer protection device, which is characterized in that it is implemented using a novel calibration system for a power supply system busbar standby automatic switching microcomputer protection device, and the method comprises the following steps:

[0012] S1. Press the start control buttons SB2 and SB4. The status of intermediate relays 1DL and 2DL is input into the busbar standby automatic transfer microcomputer protection device. The other analog quantities input into the device by the relay protection calibrator provide corresponding conditions for the device. After waiting for the set time delay, the device is judged whether the charging indicator of the device is on. If the charging indicator is on, the charging is completed. Then, press the stop control button SB1. The coil of the intermediate relay 1DL is de-energized. It is judged whether the charging indicator is off. If it is off, the device is normal. If it is not off, the device has a fault. If the charging indicator does not light up, the device has a fault.

[0013] S2. Press the start control button SB2, the coil of the intermediate relay 1DL is energized, and after waiting for the set time delay, it is judged whether the device has completed charging based on whether the charging indicator light is on. If the charging indicator light is on, charging is completed. Then press the stop control button SB3, the coil of the intermediate relay 2DL is de-energized, and it is judged whether the charging indicator light is off. If it is off, the device is normal, and if it is not off, the device has a fault. If the charging indicator light is not on, the device has a fault. This can be repeated to verify each charging condition of the device.

[0014] Preferably, S3, after the charging logic verification of the device is completed, the charging conditions required by the device are restored to complete the charging of the device, and then the relay protection tester provides the device with no pressure on bus 1 and no current on incoming line 1#. After a delay, the device sends a trip 1DL signal to simulate the tripping of incoming line switch 1#, so that the coil of intermediate relay 1DL' is energized, the normally closed switch of intermediate relay 1DL' is disconnected, and the coil of intermediate relay 1DL loses power. The device sends a trip signal to the high-voltage bus tie circuit breaker 3DL, which closes the high-voltage circuit breaker 3DL thereon and determines whether the high-voltage circuit breaker 3DL is indeed closed. If it is indeed closed, it indicates that the protection action logic of the device is complete and correct; if it is not closed, it indicates that the device has a fault.

[0015] S4. The relay protection calibrator provides the device with analog conditions such as no voltage on bus II and no current on line 2#. After a delay, the device sends a 2DL trip signal to the simulated 2DL trip switch, so that the coil of the intermediate relay 2DL' is energized, the normally closed switch of the intermediate relay 2DL' is disconnected, and the coil of the intermediate relay 2DL loses power. The device closes the high-voltage bus tie circuit breaker 3DL on it and determines whether the high-voltage bus tie circuit breaker 3DL is indeed closed. If it is indeed closed, it means that the protection action logic of the device is complete and correct. If it is not closed, it means that the device has a fault.

[0016] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0017] The positive progress of the present invention is that the new verification method no longer requires process reverse load to cooperate, and can completely and accurately verify the protection action logic of BZT. It has the characteristics of wide application range, simple design structure, safety and reliability, easy operation, and high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the electrical control principle diagram of the BZT special calibration control box in an embodiment of the present invention. The dotted part in the figure is the trip signal introduced into the calibration operation box by the high-voltage switchgear backup automatic transfer device, and the rest are the internal components of the BZT special calibration control box.

[0019] Figure 2 This is a BZT charging logic diagram of an embodiment of the present invention.

[0020] Figure 3 This is a BZT protection action logic diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] like Figure 1-3As shown, this embodiment provides a new calibration system for a busbar standby automatic switching microcomputer protection device of a power supply system (busbar standby automatic switching microcomputer protection device for short BZT), which includes a BZT dedicated calibration control box and a relay protection calibrator. The BZT dedicated calibration control box includes a stop control button SB1, a start control button SB2, a stop control button SB3, a start control button SB4, an intermediate relay 1DL, an intermediate relay 2DL, an intermediate relay 1DL', an intermediate relay 2DL', a simulated jump 1# incoming line switch, and a simulated jump 2# incoming line switch. The external power supply is connected to the stop control button SB1, the start control button SB2, the normally closed switch of the intermediate relay 1DL', and the coil of the intermediate relay 1DL in series through an air switch. The start control button S B2 is connected in parallel with the normally open switch of the intermediate relay 1DL, and the external power supply is connected to the stop control button SB3, the start control button SB4, the normally closed switch of the intermediate relay 2DL', and the coil of the intermediate relay 2DL in series through the air switch. The start control button SB4 is connected in parallel with the normally open switch of the intermediate relay 2DL, and the external power supply is connected to the simulated tripping 1# incoming line switch and the coil of the intermediate relay 1DL' in series through the air switch. The external power supply is connected to the simulated tripping 2# incoming line switch and the coil of the intermediate relay 2DL' in series through the air switch. The tripping signal of the 1# incoming line switch of the main coupling automatic microcomputer protection device is connected to the simulated tripping 1# incoming line switch, and the tripping signal of the 2# incoming line switch of the main coupling automatic microcomputer protection device is connected to the simulated tripping 2# incoming line switch.

[0023] See Figure 2 , press the start control buttons SB2 and SB4, the coils of intermediate relays 1DL and 2DL are energized (YX1=1, YX2=1), and the status of intermediate relays 1DL and 2DL are input into the busbar standby automatic transfer microcomputer protection device, replacing the original high-voltage circuit breaker input to the BZT device switch status, and the other analog quantities input into the device by the relay protection calibrator provide corresponding conditions for the device. After waiting for a 15S delay, judge whether the device is charged based on whether the charging indicator light of the device is on. If the charging indicator light is on, charging is completed. Then press the stop control button SB1, the coil of intermediate relay 1DL is de-energized (YX1=0), and judge whether the charging indicator light is off. If it is off, the device is normal. If it is not off, the device has a fault. If the charging indicator light is not on, the device has a fault.

[0024] Press the start control button SB2, the coil of the intermediate relay 1DL is energized (YX1=1), and after a 15S delay, determine whether the device has completed charging based on whether the charging indicator light is on. If the charging indicator light is on, charging is completed. Then press the stop control button SB3, the coil of the intermediate relay 2DL is de-energized (YX2=0), and determine whether the charging indicator light is off. If it is off, the device is normal, if it is not off, the device is faulty, and if the charging indicator light is not on, the device is faulty. This can be repeated to verify every charging condition of the device.

[0025] After the device charging logic verification is completed, the charging conditions required by the device are restored to complete the charging of the device. The relay protection tester then provides the device with no voltage on bus I and no current on line 1#. After a delay, the device sends a trip 1DL signal to simulate the trip 1# incoming line switch, so that the coil of the intermediate relay 1DL' is energized, the normally closed switch of the intermediate relay 1DL' is disconnected, and the coil of the intermediate relay 1DL loses power (YX1=0). The device sends a trip signal to the high-voltage bus tie circuit breaker 3DL, which closes the high-voltage circuit breaker 3DL on it and determines whether the high-voltage circuit breaker 3DL is indeed closed. If it is indeed closed, it means that the protection action logic of the device is complete and correct. If it is not closed, it means that the device has a fault (see Figure 3 ).

[0026] The relay protection calibrator then provides the device with analog conditions such as no voltage on bus II and no current on line 2#. After a delay, the device sends a 2DL trip signal to the simulated 2DL trip switch, energizing the coil of intermediate relay 2DL', disconnecting the normally closed switch of intermediate relay 2DL', and de-energizing the coil of intermediate relay 2DL (YX2=0). The device then closes the high-voltage bus tie circuit breaker 3DL on it to determine whether the high-voltage bus tie circuit breaker 3DL is actually closed. If it is actually closed, it indicates that the protection action logic of the device is complete and correct. If it is not closed, it indicates that the device has a fault.

[0027] This embodiment also provides a novel calibration method for a power supply system busbar standby automatic switching microcomputer protection device, which is implemented using a novel calibration system for a power supply system busbar standby automatic switching microcomputer protection device. The method includes the following steps:

[0028] S1. Press the start control buttons SB2 and SB4, and the coils of intermediate relays 1DL and 2DL will be energized (YX1=1, YX2=1). The status of intermediate relays 1DL and 2DL will be input into the busbar standby automatic transfer microcomputer protection device, replacing the original high-voltage circuit breaker input into the BZT device switch status, and the other analog quantities input into the device by the relay protection calibrator will provide corresponding conditions for the device. After waiting for a 15S delay, determine whether the device has completed charging based on whether the charging indicator light of the device is on. If the charging indicator light is on, charging is completed. Then press the stop control button SB1, and the coil of intermediate relay 1DL will be de-energized (YX1=0). Determine whether the charging indicator light is off. If it is off, the device is normal. If it is not off, the device is faulty. If the charging indicator light is not on, the device is faulty.

[0029] S2. Press the start control button SB2, the coil of the intermediate relay 1DL is energized (YX1=1), and after a 15S delay, determine whether the device has completed charging based on whether the charging indicator light is on. If the charging indicator light is on, charging is completed. Then press the stop control button SB3, the coil of the intermediate relay 2DL is de-energized (YX2=0), and determine whether the charging indicator light is off. If it is off, the device is normal, if it is not off, the device is faulty, and if the charging indicator light is not on, the device is faulty. This can be repeated to verify each charging condition of the device.

[0030] S3. After the charging logic verification of the device is completed, the charging conditions required by the device are restored to complete the charging of the device. The relay protection tester then provides the device with no voltage on bus I and no current on incoming line 1#. After a delay, the device sends a trip 1DL signal to simulate the tripping of incoming line 1# switch, so that the coil of intermediate relay 1DL' is energized, the normally closed switch of intermediate relay 1DL' is disconnected, and the coil of intermediate relay 1DL loses power (YX1=0). The device sends a trip signal to high-voltage bus tie circuit breaker 3DL, which closes the high-voltage circuit breaker 3DL on it and determines whether the high-voltage circuit breaker 3DL is indeed closed. If it is indeed closed, it means that the protection action logic of the device is complete and correct. If it is not closed, it means that the device has a fault (see Figure 3 ).

[0031] S4. The relay protection calibrator provides the device with analog conditions such as no voltage on bus II and no current on line 2#. After a delay, the device sends a 2DL trip signal to the simulated 2DL trip switch, so that the coil of intermediate relay 2DL' is energized, the normally closed switch of intermediate relay 2DL' is disconnected, and the coil of intermediate relay 2DL loses power (YX2=0). The device closes the high-voltage bus tie circuit breaker 3DL on it and determines whether the high-voltage bus tie circuit breaker 3DL is indeed closed. If it is indeed closed, it means that the protection action logic of the device is complete and correct. If it is not closed, it means that the device has a fault.

[0032] In this invention, a dedicated BZT calibration control box is designed to replace the operating signals of the 1# and 2# incoming line switches required for verifying the BZT protection action logic, as well as the BZT's reliable action to trip the 1# and 2# incoming line switches. This method divides the device's calibration into two parts: logic verification and linkage verification. The dedicated calibration control box simulates an operating circuit breaker to perform action logic verification, verifying the correctness of the device's action logic. After completing the logic verification, linkage verification is performed when the production equipment allows, thereby ensuring the integrity and correctness of the calibration of the entire backup automatic switching device.

[0033] The use of a new verification system and method not only simplifies the process and avoids the risk of process reverse load and electrical switching during the logic verification process, but also can verify the logic function of BZT (attached Figure 2 and attached Figure 3 ) to conduct a comprehensive verification to identify hidden dangers and avoid the possibility of a complete power outage in a section of the incoming line due to BZT malfunction or unsuccessful operation. This avoids the risk of power outage in a section of the busbar in an emergency and reduces the risk of device operation. This design also features a simple structure, low manufacturing cost, wide applicability, safety, reliability, ease of operation, and high practicality.

[0034] The BZT special calibration control box independently designed by the present invention has a simple structure, low production cost, and a concise and easy-to-understand electrical control principle. When calibrating the BZT, it will not affect the operating production equipment.

[0035] The BZT special verification control box uses intermediate relays 1DL and 2DL to simulate the 1# and 2# incoming line switches under the normal operating mode of the 6 / 10kV power supply system, and uses its auxiliary contacts to replace the 1DL closed position (YX1=1) and 2DL closed position (YX2=1) in the BZT charging conditions.

[0036] This method divides the periodic verification of the microcomputer BZT system into two parts: logic verification and actual line verification. It can perform real-time verification of the protection logic of the standby automatic start-up system when the device is running. When the device allows single busbar operation in the later stage, the system can be debugged in conjunction with the switching coordination method. While meeting the debugging requirements of the standby automatic start-up system, it avoids the disadvantages of the device shutdown coordination, reduces the coordination cost of the test, and verifies the correctness of the standby automatic start-up system action.

[0037] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A new type of verification system for the automatic switching microcomputer protection device of the power supply system busbar backup, characterized in that: It includes a BZT special calibration control box and a relay protection calibrator. The BZT special calibration control box includes a stop control button SB1, a start control button SB2, a stop control button SB3, a start control button SB4, an intermediate relay 1DL, an intermediate relay 2DL, an intermediate relay 1DL', and an intermediate relay 2DL'. An external power supply is connected in series to the stop control button SB1, the start control button SB2, the normally closed switch of the intermediate relay 1DL', and the coil of the intermediate relay 1DL through an air switch. The start control button SB2 is connected in parallel with the normally open switch of the intermediate relay 1DL. An external power supply is connected in series to the stop control button SB3, the start control button SB4, the normally closed switch of the intermediate relay 2DL', and the coil of the intermediate relay 2DL through an air switch. The start control button SB4 is connected in parallel with the normally open switch of the intermediate relay 2DL. Press the start control buttons SB2 and SB4, the coils of the intermediate relays 1DL and 2DL are energized, the status of the intermediate relays 1DL and 2DL are input into the busbar standby automatic transfer microcomputer protection device, and the other analog quantities input into the device by the relay protection calibrator provide corresponding conditions for the device. After waiting for the set time delay, it is judged whether the device is fully charged based on whether the charging indicator of the device is on. If the charging indicator is on, charging is completed. Then, press the stop control button SB1, the coil of the intermediate relay 1DL is de-energized, and it is judged whether the charging indicator of the device is off. If it is off, the device is normal. If it is not off, the device is faulty. If the charging indicator is not on, the device is faulty. Press the start control button SB2, the coil of the intermediate relay 1DL is energized, and after waiting for the set time delay, it is judged whether the device has completed charging based on whether the charging indicator light is on. If the charging indicator light is on, charging is completed. Then press the stop control button SB3, the coil of the intermediate relay 2DL is de-energized, and it is judged whether the charging indicator light is off. If it is off, the device is normal, and if it is not off, the device has a fault. If the charging indicator light is not on, the device has a fault. This can be repeated to verify each charging condition of the device.

2. The novel calibration system for the busbar standby automatic switching microcomputer protection device of the power supply system according to claim 1 is characterized in that: The BZT special calibration control box also includes a simulated jump 1# incoming line switch and a simulated jump 2# incoming line switch, an external power supply is connected to the series-connected simulated jump 1# incoming line switch and the coil of the intermediate relay 1DL' through an air switch, an external power supply is connected to the series-connected simulated jump 2# incoming line switch and the coil of the intermediate relay 2DL' through an air switch, a trip signal of the 1# incoming line switch of the bus coupling standby automatic transfer microcomputer protection device is connected to the simulated jump 1# incoming line switch, and a trip signal of the 2# incoming line switch of the bus coupling standby automatic transfer microcomputer protection device is connected to the simulated jump 2# incoming line switch; After the charging logic verification of the device is completed, the charging conditions required by the device are restored to complete the charging of the device. The relay protection tester then provides the device with no voltage on bus 1 and no current on incoming line 1. After a delay, the device sends a trip 1DL signal to simulate the tripping of the incoming line switch 1#, so that the coil of the intermediate relay 1DL' is energized, the normally closed switch of the intermediate relay 1DL' is disconnected, and the coil of the intermediate relay 1DL loses power. The device then sends a trip signal to the high-voltage bus tie circuit breaker 3DL, which closes the high-voltage bus tie circuit breaker 3DL on it and determines whether the high-voltage bus tie circuit breaker 3DL is indeed closed. If it is indeed closed, it indicates that the protection action logic of the device is complete and correct. If it is not closed, it indicates that the device has a fault. The relay protection calibrator then provides the device with analog conditions of no voltage on bus II and no current on line 2#. After a delay, the device sends a 2DL trip signal to the simulated 2DL trip switch, energizing the coil of the intermediate relay 2DL' and disconnecting the normally closed switch of the intermediate relay 2DL'. The coil of the intermediate relay 2DL loses power, and the device closes the high-voltage bus tie circuit breaker 3DL on it to determine whether the high-voltage bus tie circuit breaker 3DL is actually closed. If it is actually closed, it indicates that the protection action logic of the device is complete and correct. If it is not closed, it indicates that the device has a fault.

3. The method for verifying a novel verification system for a busbar standby automatic switching microcomputer protection device of a power supply system according to claim 1, characterized in that: The method is implemented by using a new type of verification system for a power supply system busbar standby automatic switching microcomputer protection device, and the method includes the following steps: S1. Press the start control buttons SB2 and SB4. The status of intermediate relays 1DL and 2DL is input into the busbar standby automatic transfer microcomputer protection device. The other analog quantities input into the device by the relay protection calibrator provide corresponding conditions for the device. After waiting for the set time delay, the device is judged whether the charging indicator of the device is on. If the charging indicator is on, the charging is completed. Then, press the stop control button SB1. The coil of the intermediate relay 1DL is de-energized. It is judged whether the charging indicator is off. If it is off, the device is normal. If it is not off, the device has a fault. If the charging indicator does not light up, the device has a fault. S2. Press the start control button SB2, the coil of the intermediate relay 1DL is energized, and after waiting for the set time delay, it is judged whether the device has completed charging based on whether the charging indicator light is on. If the charging indicator light is on, charging is completed. Then press the stop control button SB3, the coil of the intermediate relay 2DL is de-energized, and it is judged whether the charging indicator light is off. If it is off, the device is normal, and if it is not off, the device has a fault. If the charging indicator light is not on, the device has a fault. This can be repeated to verify each charging condition of the device.

4. The novel calibration method for the power supply system busbar standby automatic switching microcomputer protection device according to claim 3 is characterized in that: S3. After the charging logic verification of the device is completed, the charging conditions required by the device are restored to complete charging of the device. The relay protection tester then provides the device with no voltage on bus 1 and no current on incoming line 1. After a delay, the device sends a trip 1DL signal to simulate tripping the incoming line switch 1#, energizing the coil of intermediate relay 1DL' and disconnecting the normally closed switch of intermediate relay 1DL'. The coil of intermediate relay 1DL loses power, and the device sends a trip signal to high-voltage bus tie circuit breaker 3DL. The device closes the high-voltage bus tie circuit breaker 3DL thereon and determines whether the high-voltage bus tie circuit breaker 3DL is indeed closed. If it is indeed closed, it indicates that the protection action logic of the device is complete and correct; if it is not closed, it indicates that the device has a fault. S4. The relay protection calibrator provides the device with analog conditions of no voltage on bus II and no current on line 2#. After a delay, the device sends a trip 2DL signal to the simulated trip 2# incoming line switch, so that the coil of intermediate relay 2DL' is energized, the normally closed switch of intermediate relay 2DL' is disconnected, and the coil of intermediate relay 2DL loses power. The device closes the high-voltage bus tie circuit breaker 3DL on it and determines whether the high-voltage bus tie circuit breaker 3DL is indeed closed. If it is indeed closed, it means that the protection action logic of the device is complete and correct. If it is not closed, it means that the device has a fault.

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