A method and system for automated switching of plant power supply based on automatic transfer switch.

Abstract

This invention relates to the field of power system technology, and in particular to a method and system for automated switching of plant auxiliary power based on automatic transfer switch (ATS). The method first checks the status of power system equipment within the switching range to confirm that the position status of each circuit breaker and the operating status of the ATS meet the switching operation conditions. Based on the preset power supply switching mode, the operating mode of the ATS on the target bus is configured through the monitoring system, the corresponding power supply point is selected as the tie power source, and the incoming circuit breaker is disconnected by the monitoring system in a programmed manner. The ATS on the target bus automatically closes the corresponding tie circuit breaker, completing the power supply switch. After the switching operation, the voltage of each voltage level of the plant auxiliary power system is checked to be normal, confirming that the system operating status meets the requirements. This invention utilizes the automatic judgment and action of the ATS to achieve one-button automated switching of plant auxiliary power, significantly reducing the risk of misoperation, while also reducing the number of circuit breaker actions and avoiding asynchronous parallel operation.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to a method and system for automated switching of plant power supply based on automatic transfer switch. Background Technology

[0002] The power supply system of a hydropower station, as a core support facility for the station's operation, mainly consists of a 10kV high-voltage level and a 400V low-voltage level, playing a crucial role in equipment maintenance, operation mode adjustment, and fault handling. With the development of power automation technology, power supply switching operations have evolved from traditional manual on-site operation to programmed one-button switching operations via a monitoring system. The related technologies integrate the remote operation circuit, position status, and bus voltage of the circuit breaker into the monitoring system, and, in conjunction with automatic transfer switch (ATS) devices, achieve automatic judgment and action, constructing a complete automated control system encompassing data acquisition, logical judgment, command execution, and status feedback.

[0003] However, existing technologies still have significant shortcomings. Manual switching operations require filling out approximately 80 operation tickets, taking 90 to 180 minutes, resulting in a large workload and the risk of operational errors. While automatic switching via a monitoring system reduces manual intervention, it requires modifications to numerous switches to connect to the monitoring system, and each switching operation involves many switches, impacting the lifespan of circuit breakers. Furthermore, if the plant's power system is asynchronous, with different transformer wiring groups, unequal voltage ratios, or inconsistent bus voltage, frequency, and phase, it will directly lead to asynchronous paralleling accidents, disrupting system voltage stability and causing widespread power outages. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the first objective of this invention is to propose an automated switching method for plant power supply based on automatic transfer switch, comprising the following steps:

[0006] S1, check the status of power system equipment within the switching range to confirm that the position status of each circuit breaker and the operating status of the standby automatic transfer device meet the switching operation conditions; S2, according to the preset power supply switching mode, the operating mode of the backup automatic transfer device of the target bus is configured through the monitoring system, the corresponding power point is selected as the power supply source for the connection, and the incoming circuit breaker is disconnected by the program operation of the monitoring system. The backup automatic transfer device of the target bus automatically closes the corresponding connection circuit breaker to complete the power supply switching. The power supply switching mode includes: switching from segmented power supply to plant power supply connection operation, switching from segmented power supply to external power supply connection operation, switching from plant power supply connection operation to 1GB power supply operation, and switching from plant power supply connection operation to 1GB power supply operation. S3, after checking the switching operation, ensure that the voltage of each voltage level of the plant power system is normal and that the system operation status meets the requirements.

[0007] In one embodiment of the present invention, the backup automatic transfer device includes 10kV system equipment and 400V system equipment; Among them, the set value t4 of the 400V automatic transfer switch operation delay satisfies t4≧t1 + t2, where t1 is the sum of the automatic transfer switch power failure trip delay and the incoming line circuit breaker opening time, and t2 is the sum of the automatic transfer switch closing tie circuit breaker operation time and the tie circuit breaker closing time.

[0008] In one embodiment of the present invention, the step S1 of checking the status of power system equipment within the switching range includes: S11, Check the status of 10kV system equipment within the switching range and confirm that the position status of each circuit breaker meets the switching operation conditions; S12, check the status of the 400V system equipment within the switching range, and confirm that the position status of each circuit breaker meets the switching operation conditions; S13, check the operating status of the automatic transfer switch at each voltage level and confirm that the automatic transfer switch is operating normally.

[0009] In one embodiment of the present invention, the switching method from segmented switching to in-plant power supply interconnection operation is as follows: After confirming that the status of the 10kV system equipment and the 400V system equipment meets the switching operation conditions, the 10kV plant power supply section 1 is switched to the power supply connection operation of section 2.

[0010] In one embodiment of the present invention, the switching method from segmented switching to external power supply for interconnection operation is as follows: After confirming that the status of the 10kV system equipment and the 400V system equipment meets the switching operation conditions, the 10kV plant power supply section 1 is switched to the power supply connection operation of section 4.

[0011] In one embodiment of the present invention, the switching method from in-plant power supply interconnection operation to 1GB power supply operation and from segmented switching to in-plant power supply interconnection operation is as follows: A21. After confirming that the status of the 10kV system equipment and the 400V system equipment meets the switching operation conditions, switch the 10kV plant power section 1 #1M busbar to no-load operation. A22, after confirming that the #1M busbar of the 10kV plant power supply section 1 is de-energized, the 10kV plant power supply section 1 will be switched to operation powered by 1GB.

[0012] In one embodiment of the present invention, S3 further includes: If the system's operating status does not meet the requirements within the set delay range, a process timeout alarm will be triggered.

[0013] To achieve the above objectives, a second aspect of the present invention provides an automated switching system for plant power supply based on automatic transfer switch, comprising: The status detection module is used to check the status of power system equipment within the switching range and confirm that the position status of each circuit breaker and the operating status of the standby automatic transfer device meet the switching operation conditions. The switching control module is used to configure the working mode of the backup automatic transfer device of the target bus according to the preset power supply mode through the monitoring system, select the corresponding power supply point as the tie power source, and disconnect the incoming circuit breaker by the programmed operation of the monitoring system. The backup automatic transfer device of the target bus automatically closes the corresponding tie circuit breaker to complete the power supply switching. Connect the status detection module to check that the voltage of each voltage level of the plant power system is normal after the switching operation, and confirm that the system operation status meets the requirements.

[0014] In one embodiment of the present invention, the backup automatic transfer device includes 10kV system equipment and 400V system equipment; Among them, the set value t4 of the 400V automatic transfer switch operation delay satisfies t4≧t1 + t2, where t1 is the sum of the automatic transfer switch power failure trip delay and the incoming line circuit breaker opening time, and t2 is the sum of the automatic transfer switch closing tie circuit breaker operation time and the tie circuit breaker closing time.

[0015] To achieve the above objectives, a third aspect of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in the first aspect.

[0016] The method, system, and storage medium of this invention utilize an automatic transfer switch to automatically determine and realize the switching of plant power, reducing the complex process of traditional manual operation and automatic switching of monitoring systems, effectively avoiding the risk of asynchronous parallel operation, and reducing the number of circuit breaker operations by coordinating with the 400V automatic transfer setting, thereby improving operating efficiency and equipment reliability.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a plant power automation switching method based on automatic transfer switch according to an embodiment of the present invention; Figure 2This is a structural diagram of a plant power automation switching system based on automatic transfer switch according to an embodiment of the present invention; Figure 3 This is a diagram of the plant power system according to an embodiment of the present invention. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] The following describes, with reference to the accompanying drawings, an automated switching method and system for plant power supply based on automatic transfer switch (ATS), according to an embodiment of the present invention.

[0022] Example 1 Figure 1 This is a flowchart of an embodiment of the automatic switching method for plant power supply based on automatic transfer switch.

[0023] like Figure 1 As shown, the automatic switching method for plant power supply based on standby automatic transfer includes the following steps: S1 checks the status of power system equipment within the switching range to confirm that the position status of each circuit breaker and the operating status of the automatic transfer switch meet the switching operation conditions.

[0024] Before performing automated switching operations, a comprehensive inspection of the power system equipment within the switching range is required to confirm that the position status of each circuit breaker and the operating status of the automatic transfer switch (ATS) meet the switching operation conditions. The ATS includes 10kV and 400V system equipment. To ensure stable system operation, the 400V ATS operating delay setting t4 satisfies t4 ≥ t1 + t2, where t1 is the sum of the ATS power failure tripping delay and the incoming circuit breaker opening time, and t2 is the sum of the ATS closing tie circuit breaker operating time and the tie circuit breaker closing time.

[0025] As one implementation method, for a 10kV plant power system, the inspection items may include: confirming that the relevant incoming circuit breakers are in the closed position, the relevant sectionalizing circuit breakers are in the open position, and that the 10kV busbar automatic transfer switch is operating normally; for a 400V plant power system, the inspection items may include: confirming that each 400V incoming circuit breaker is in the closed position, each 400V tie circuit breaker is in the open position, and that each 400V system automatic transfer switch is operating normally. By pre-checking the status of equipment within the switching range, switching operation failures or system malfunctions due to unmet equipment status can be effectively avoided, ensuring the safe and reliable execution of automated switching operations.

[0026] S2, according to the preset power supply mode, the monitoring system configures the working mode of the backup automatic transfer device of the target bus, selects the corresponding power supply point as the power source for the connection, and the monitoring system disconnects the incoming circuit breaker in a programmed manner. The backup automatic transfer device of the target bus automatically closes the corresponding connection circuit breaker to complete the power supply switching.

[0027] During the automatic switching process of plant power, the operating mode of the backup automatic transfer device of the target bus is configured through the monitoring system according to the preset power supply mode, so as to select the corresponding power supply point as the power supply source for connection.

[0028] As one implementation method, when the 10kV busbar is configured with two automatic transfer switch (ATS) modes, namely Mode 1 and Mode 2, the monitoring system sets up two output nodes corresponding to the blocking nodes for Mode 1 and Mode 2, respectively. For example, Mode 1 is set to the plant power supply mode, and Mode 2 is set to the external power supply mode. When the plant power supply is required, the monitoring system activates the blocking node for ATS Mode 2, causing the ATS device to operate according to the logic of Mode 1. The power supply modes switched in this invention include: switching from segmented operation to plant power supply connection operation, switching from segmented operation to external power supply connection operation, switching from plant power supply connection operation to 1GB power supply operation, and switching from plant power supply connection operation to 1GB power supply operation.

[0029] After completing equipment status checks and configuring the automatic transfer switch (ATS) mode, the power switching execution phase begins. In this phase, the monitoring system programmatically disconnects the incoming circuit breaker, while the ATS device on the target busbar monitors the busbar's power loss status in real time. Once a busbar voltage loss is detected and the activation conditions are met, the pre-selected tie circuit breaker is automatically closed, thus completing the power switch from the original incoming power supply to the tie power supply. The ATS device's operating logic is based on the busbar voltage status judgment and a preset delay setting, ensuring that the target busbar can quickly restore power during the transition period after the incoming circuit breaker disconnects and before the tie circuit breaker closes. The entire power switching process is monitored by the monitoring system, which determines the success of the operation through real-time feedback of the switch position status. If the circuit breaker is not detected to have activated within the preset delay, a timeout alarm is triggered to indicate an operational anomaly.

[0030] S3, after checking the switching operation, ensure that the voltage of each voltage level of the plant power system is normal and that the system operation status meets the requirements.

[0031] After completing the power switching operation, the results of the switching operation need to be verified and checked to ensure that all voltage levels of the plant power system have returned to normal operation. In this invention, the system can monitor the voltage signals collected by the voltage transformers of each bus to determine whether the 10kV and 400V plant power bus voltages are within the normal range, and at the same time verify whether the actual position status of each circuit breaker is consistent with the target operating mode. For the 10kV system, the focus is on checking whether the bus voltage has returned to near the rated value to ensure voltage stability after switching from segmented operation to interconnected operation; for the 400V system, it is necessary to confirm that the system maintains segmented operation and that the opening and closing positions of each incoming circuit breaker and interconnected circuit breaker are correct. The system also has a timeout judgment mechanism for the inspection results. If the voltage or status signal does not meet the expected conditions within a preset time, the process is judged to be abnormal and an alarm is issued. As one implementation method, the monitoring system can set a total delay of 5 seconds as the feedback judgment cycle. If the 10kV plant power system voltage and the 400V system segmented operation status are not simultaneously met within the specified time, a process timeout alarm is triggered.

[0032] Example 2 Based on the above embodiments, the various power supply modes mentioned in this invention will be described.

[0033] like Figure 3 The diagram shows the plant auxiliary power system. When the 10kV plant auxiliary power section 1 is switched from being segmented to being connected to the plant's internal power supply section 2, the specific operating steps are as follows: A1: Inspect the status of the 10kV system equipment within the switching range to ensure that the operating mode of each system meets the switching operation conditions. Specifically: check that circuit breakers 001, 002, 012, 013, 014, 015, and 016 are in the closed position; check that circuit breakers 010, 020, 030, 041, and 042 are in the open position; and check that the 10kV Section 1 automatic transfer switch is operating normally.

[0034] Check the status of the 400V system equipment within the switching range to ensure that the operating mode of each system meets the switching operation conditions. Specifically: check that circuit breakers 411, 412, 421, 422, 441, 442, 451, 452, 471, and 472 are in the closed position; check that circuit breakers 410, 420, 440, 450, and 470 are in the open position; and check that all automatic transfer switches in the 400V system are operating normally.

[0035] A2, switch the 10kV Section 1 to be connected to Section 2 for power supply. Specifically: the monitoring system program disconnects circuit breaker 001, triggering the automatic transfer switch (ATS) of section 1 to automatically close circuit breaker 020. (A 0.5-second delay is used to determine the position of circuit breaker 001; if it is not open, a timeout alarm is triggered. The ATS operation time is 0.3 seconds, with a 1-second delay to determine the position of switch 020; if it is not closed, a timeout alarm is triggered.) A3: After checking that the 10kV plant power system voltage is normal and the 400V system is operating normally in sections after the switching operation, the process ends. If the total delay is greater than 5 seconds and the feedback condition is not met, a process timeout alarm will be triggered.

[0036] When the 10kV plant auxiliary power section 1 is switched from being segmented to being connected by four external power supplies, the specific operating steps are as follows: B1. Inspect the status of the 10kV system equipment within the switching range to ensure that the operating mode of each system meets the switching operation conditions. Specifically: check that circuit breakers 001, 049, 012, 013, 014, 015, and 016 are in the closed position; check that circuit breakers 010, 020, 030, 041, and 042 are in the open position; and check that the 10kV Section 1 automatic transfer switch is operating normally.

[0037] Check the status of the 400V system equipment within the switching range to ensure that the operating mode of each system meets the switching operation conditions. Specifically: check that circuit breakers 411, 412, 421, 422, 441, 442, 451, 452, 471, and 472 are in the closed position; check that circuit breakers 410, 420, 440, 450, and 470 are in the open position; and check that all automatic transfer switches in the 400V system are operating normally.

[0038] B2, Adjust the automatic transfer mode of 10kV Section 1. That is, the monitoring system issues a signal to block the automatic transfer mode 1 of 10kV Section 1.

[0039] The 10kV Section 1 power supply will be switched to a connection between Section 4 and the main power supply. Specifically: the monitoring system program will disconnect circuit breaker 001, triggering the automatic transfer switch (ATS) of Section 1 to automatically close circuit breaker 041. (A 0.5-second delay is used to determine the position of circuit breaker 001; if it is not open, a timeout alarm will sound. The ATS operation time is 0.3 seconds, with a 1-second delay to determine the position of switch 041; if it is not closed, a timeout alarm will sound.)

[0040] B3: After checking that the 10kV plant power system voltage is normal and the 400V system is operating normally in sections after the switching operation, the process ends upon completion of the check. If the total delay exceeds 5 seconds and the feedback condition is not met, a process timeout alarm will be triggered.

[0041] When the 10kV plant auxiliary power section 1, which was previously powered by the 2nd section of the plant's internal power supply, is switched to being powered by the 1GB power supply, the specific operating steps are as follows: C1, check the status of 10kV system equipment within the switching range to ensure that the operating mode of each system meets the switching operation conditions. Specifically: check that circuit breakers 002, 012, 013, 014, 015, 016, and 020 are in the closed position; check that circuit breakers 001, 010, 041, and 042 are in the open position.

[0042] Check the status of the 400V system equipment within the switching range to ensure that the operating mode of each system meets the switching operation conditions. Specifically: check that circuit breakers 411, 412, 421, 422, 441, 442, 451, 452, 471, and 472 are in the closed position; check that circuit breakers 410, 420, 440, 450, and 470 are in the open position; and check that all automatic transfer switches in the 400V system are operating normally.

[0043] C2, switch the 10kV Section 1 #1M busbar to no-load operation. That is: the monitoring system program disconnects circuit breakers 012, 013, 014, 015, and 016; the 400V system automatic transfer switch activates, disconnecting circuit breakers 411, 421, 441, 451, and 471, and closing circuit breakers 410, 420, 440, 450, and 470.

[0044] The 10kV Section 1 will be switched to 1GB power supply. Specifically: the monitoring system program will disconnect circuit breaker 020, check that the 10kV Section 1 busbar #1M is de-energized and functioning normally, then the monitoring system program will close circuit breaker 001, check that the voltage of the 10kV Section 1 busbar #1M is normal. (After the 020 switch tripping command is issued, there is a 0.5s delay to determine the 020 switch position; if it is not tripped, a timeout alarm will be triggered).

[0045] To restore the 400V system to normal operation, the monitoring system program sequentially closes circuit breakers 012, 013, 014, 015, and 016; the 400V system's automatic transfer switch activates, disconnecting circuit breakers 410, 420, 440, 450, and 470, and closing circuit breakers 411, 421, 441, 451, and 471.

[0046] C3: After checking that the 10kV plant power system voltage is normal and the 400V system is operating normally in sections after the switching operation, the process ends upon completion of the check. If the total delay exceeds 5 seconds and the feedback condition is not met, a process timeout alarm will be triggered.

[0047] When the 10kV plant auxiliary power section 1, which was previously powered by the 4th section of the plant's internal power supply, is switched to being powered by the 1GB power supply, the specific operating steps are as follows: D1. Check the status of the 10kV system equipment within the switching range to ensure that the operating mode of each system meets the switching operation conditions. Specifically: check that circuit breakers 049, 012, 013, 014, 015, 016, and 041 are in the closed position; check that circuit breakers 001, 010, 020, and 042 are in the open position.

[0048] Check the status of the 400V system equipment within the switching range to ensure that the operating mode of each system meets the switching operation conditions. Specifically: check that circuit breakers 411, 412, 421, 422, 441, 442, 451, 452, 471, and 472 are in the closed position; check that circuit breakers 410, 420, 440, 450, and 470 are in the open position; and check that all automatic transfer switches in the 400V system are operating normally.

[0049] D2, switch the 10kV Section 1 #1M busbar to no-load operation. That is: the monitoring system program disconnects circuit breakers 012, 013, 014, 015, and 016; the 400V system automatic transfer switch activates, disconnecting circuit breakers 411, 421, 441, 451, and 471, and closing circuit breakers 410, 420, 440, 450, and 470.

[0050] The 10kV Section 1 will be switched to 1GB power supply. Specifically: the monitoring system program will disconnect circuit breaker 041, check that the 10kV Section 1 busbar #1M is de-energized and functioning normally, then the monitoring system program will close circuit breaker 001, check that the voltage of the 10kV Section 1 busbar #1M is normal. (After the 041 switch tripping command is issued, there is a 0.5s delay to determine the 041 switch position; if it is not tripped, a timeout alarm will be triggered.) To restore the 400V system to normal operation, the monitoring system program sequentially closes circuit breakers 012, 013, 014, 015, and 016; the 400V system's automatic transfer switch activates, disconnecting circuit breakers 410, 420, 440, 450, and 470, and closing circuit breakers 411, 421, 441, 451, and 471.

[0051] D3: After checking that the 10kV plant power system voltage is normal and the 400V system is operating normally in sections after the switching operation, the process ends. If the total delay is greater than 5 seconds and the feedback condition is not met, a process timeout alarm will be triggered.

[0052] Example 3 like Figure 2 As shown, this invention proposes an automated switching system 10 for plant power supply based on automatic transfer switch, comprising: The status detection module 100 is used to check the status of power system equipment within the switching range and confirm that the position status of each circuit breaker and the operating status of the automatic transfer switch meet the switching operation conditions.

[0053] The automatic transfer switch includes 10kV system equipment and 400V system equipment. In order to ensure the stable operation of the system, the action delay setting t4 of the 400V automatic transfer switch satisfies t4≧t1 + t2, where t1 is the sum of the automatic transfer switch power failure trip delay and the incoming line circuit breaker opening time, and t2 is the sum of the automatic transfer switch closing tie circuit breaker action time and the tie circuit breaker closing time.

[0054] The switching control module 200 is used to configure the operating mode of the backup automatic transfer device of the target bus according to the preset power supply mode through the monitoring system, select the corresponding power supply point as the tie power supply source, and disconnect the incoming circuit breaker by the programmed operation of the monitoring system. The backup automatic transfer device of the target bus automatically closes the corresponding tie circuit breaker to complete the power supply switching.

[0055] Connect the status detection module 300 to check that the voltage of each voltage level of the plant power system is normal after the switching operation, and confirm that the system operation status meets the requirements.

[0056] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-described automatic switching method for plant power supply based on automatic transfer switch.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A method for automated switching of plant power supply based on automatic transfer switch, characterized in that, Includes the following steps: S1, check the status of power system equipment within the switching range to confirm that the position status of each circuit breaker and the operating status of the standby automatic transfer device meet the switching operation conditions; S2, according to the preset power supply switching mode, the operating mode of the backup automatic transfer device of the target bus is configured through the monitoring system, the corresponding power point is selected as the power supply source for the connection, and the incoming circuit breaker is disconnected by the program operation of the monitoring system. The backup automatic transfer device of the target bus automatically closes the corresponding connection circuit breaker to complete the power supply switching. The power supply switching mode includes: switching from segmented power supply to plant power supply connection operation, switching from segmented power supply to external power supply connection operation, switching from plant power supply connection operation to 1GB power supply operation, and switching from plant power supply connection operation to 1GB power supply operation. S3, after checking the switching operation, ensure that the voltage of each voltage level of the plant power system is normal and that the system operation status meets the requirements.

2. The method as described in claim 1, characterized in that, The backup automatic transfer device includes 10kV system equipment and 400V system equipment; Among them, the set value t4 of the 400V automatic transfer switch operation delay satisfies t4≧t1 + t2, where t1 is the sum of the automatic transfer switch power failure trip delay and the incoming line circuit breaker opening time, and t2 is the sum of the automatic transfer switch closing tie circuit breaker operation time and the tie circuit breaker closing time.

3. The method as described in claim 2, characterized in that, The S1 check of the power system equipment status within the switching range includes: S11, Check the status of 10kV system equipment within the switching range and confirm that the position status of each circuit breaker meets the switching operation conditions; S12, check the status of the 400V system equipment within the switching range, and confirm that the position status of each circuit breaker meets the switching operation conditions; S13, check the operating status of the automatic transfer switch at each voltage level and confirm that the automatic transfer switch is operating normally.

4. The method as described in claim 2, characterized in that, The switching method from segmented switching to in-plant power supply interconnection operation is as follows: After confirming that the status of the 10kV system equipment and the 400V system equipment meets the switching operation conditions, the 10kV plant power supply section 1 is switched to the power supply connection operation of section 2.

5. The method as described in claim 2, characterized in that, The switching method from segmented switching to external power supply for interconnection operation is as follows: After confirming that the status of the 10kV system equipment and the 400V system equipment meets the switching operation conditions, the 10kV plant power supply section 1 is switched to the power supply connection operation of section 4.

6. The method as described in claim 2, characterized in that, The switching methods for switching from in-plant power supply to 1GB power supply and from segmented power supply to in-plant power supply are as follows: A21. After confirming that the status of the 10kV system equipment and the 400V system equipment meets the switching operation conditions, switch the 10kV plant power supply section 1 #1M busbar to no-load operation. A22, after confirming that the #1M busbar of the 10kV plant power supply section 1 is de-energized, the 10kV plant power supply section 1 will be switched to operation powered by 1GB.

7. The method as described in claim 1, characterized in that, S3 further includes: If the system's operating status does not meet the requirements within the set delay range, a process timeout alarm will be triggered.

8. An automated switching system for plant power supply based on automatic transfer switching, characterized in that, include: The status detection module is used to check the status of power system equipment within the switching range and confirm that the position status of each circuit breaker and the operating status of the standby automatic transfer device meet the switching operation conditions. The switching control module is used to configure the working mode of the backup automatic transfer device of the target bus according to the preset power supply mode through the monitoring system, select the corresponding power supply point as the tie power source, and disconnect the incoming circuit breaker by the programmed operation of the monitoring system. The backup automatic transfer device of the target bus automatically closes the corresponding tie circuit breaker to complete the power supply switching. Connect the status detection module to check that the voltage of each voltage level of the plant power system is normal after the switching operation, and confirm that the system operation status meets the requirements.

9. The system as described in claim 8, characterized in that, The backup automatic transfer device includes 10kV system equipment and 400V system equipment; Among them, the set value t4 of the 400V automatic transfer switch operation delay satisfies t4≧t1 + t2, where t1 is the sum of the automatic transfer switch power failure trip delay and the incoming line circuit breaker opening time, and t2 is the sum of the automatic transfer switch closing tie circuit breaker operation time and the tie circuit breaker closing time.

10. A computer-readable storage medium storing a computer program that, when executed by a processor, implements the method as claimed in any one of claims 1-8.

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