Self-adaptive topology real-time updating method and system for dealing with fault sequence of switching-on and switching-off signals of spare power automatic switching device of power distribution station house

Abstract

The invention relates to a self-adaptive topology real-time updating method and a self-adaptive topology real-time updating system for dealing with a fault sequence of opening and closing signals of a spare power automatic switching device of a power distribution station house. The method comprises the following steps: S1, switch marking: accurately marking switches related to spare power automatic switching in a power distribution master station system; s2, performing switching identification: maintaining the switching state of the spare power automatic switching device in the power distribution master station system; step S3, signal identification: when the power distribution main station receives the switch signal, automatically judging whether the switch is a spare power automatic switching switch, and identifying the current switching state of a spare power automatic switching device; and S4, topology updating: based on a judgment result of the step S3, a differentiation strategy is adopted to update the distribution line topology. According to the method, the problem of wrong sequence of the spare power automatic switching-on and switching-off signals can be intelligently solved, the real-time and accurate updating of the line topology at the power distribution main station side is realized, and the reliable and correct action of a centralized feeder automation system is ensured.

Description

Technical Field

[0001] This invention relates to the field of power distribution automation technology, and in particular to an adaptive topology real-time update method and system for dealing with the missequence of opening and closing signals of automatic transfer switches in substations. Background Technology

[0002] Currently, centralized feeder automation based on distribution substations is the mainstream fault self-healing technology for distribution networks. Its working principle combines line fault information with real-time topology to quickly locate faulty sections, perform precise isolation, and transfer loads to non-faulty areas, thus significantly improving fault handling speed and power supply reliability. In this process, the accuracy of the real-time line topology is a fundamental prerequisite for the correct operation of centralized feeder automation. As an important device for improving power supply reliability, the automatic transfer switch (ATS) in the distribution substation can monitor the status of the main power supply in real time and automatically perform load switching when the main power supply fails, effectively shortening power outage time for users. However, the ATS operation causes changes in the line topology, and its coordination with the centralized feeder automation system still faces certain challenges. Especially in some scenarios, the order of ATS opening and closing signals may be incorrect, causing the distribution substation to update the topology based on the incorrect order, resulting in the failure of centralized feeder automation strategy generation and execution, and thus delaying the normal load restoration of the entire line. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an adaptive real-time topology update method and system for dealing with the misordering of switching signals of automatic transfer switches in substations. The aim is to intelligently accommodate the problem of misordering switching signals of automatic transfer switches, realize real-time and accurate updates of the line topology on the main substation side, and ensure the reliable and correct operation of centralized feeder automation systems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an adaptive topology real-time update method for addressing the misordering of opening and closing signals of automatic transfer switches in substations, comprising the following steps: Step S1, Switch Marking: Accurately identify the switches related to automatic transfer switch in the power distribution master station system; Step S2, Enable / Disable Status: Maintain the enable / disable status of the automatic transfer switch in the power distribution master station system; Step S3, Signal Identification: The power distribution master station monitors and receives switch signals in real time, and automatically determines whether the signal is a tripping or closing action signal; if it is determined to be a tripping or closing signal, the process continues to step S4; if it is not such a signal, no processing is performed. Step S4, Topology Update: Based on the judgment result of step S3, the distribution line topology is updated using a differentiated strategy.

[0005] Step S5: Repeat steps S3-S4 until all signals have been processed.

[0006] In a preferred embodiment, in step S1, the automatic transfer switch refers to the automatic transfer device for backup power supply in the substation, including incoming line backup transfer and bus tie backup transfer; wherein, the incoming line backup transfer is used to automatically switch between two incoming power supplies, and quickly activate the backup incoming line when the main incoming line loses power; the bus tie backup transfer is used in a single busbar segmented structure to enable the power outage busbar to be powered by another normal busbar by closing the bus tie switch.

[0007] In a preferred embodiment, in step S1, the switch related to automatic transfer switch refers to the two incoming power switches and the bus tie switch.

[0008] In a preferred embodiment, in step S2, the "operation / deactivation status" refers to whether the incoming line backup operation and bus tie backup operation functions of the automatic transfer switch are in normal operating and enabled state; if either the incoming line backup operation or the bus tie backup operation function of the device is in normal "operation" state, it can be determined that the device as a whole is in "operation" state.

[0009] In a preferred embodiment, in step S4, the topology update performs the following sub-steps: Step S41: Determine if there is a closing signal; if it is a closing signal, continue to step S42; otherwise, proceed to step S44. Step S42: Determine if there is an automatic transfer switch signal; if there is an automatic transfer switch signal, continue to step S43; otherwise, proceed to step S46. Step S43: Determine whether the backup automatic transfer function is "activated"; if the backup automatic transfer function is "activated", proceed to step S45; otherwise, proceed to step S46. Step S44: Update the energized status of all loads downstream of the trip switch to de-energized; Step S45: If the backup automatic transfer switch is already energized on one side before closing, then starting from the closing switch, along the opposite line topology direction, update the energized status of all loads between the closing switch and the incoming power switch corresponding to the same backup automatic transfer device to be energized, and update the power supply to the power supply connected to the closing switch. Step S46: If the switch is already energized on one side before closing, then starting from the closing switch, along the opposite line topology direction, update the energized state of all loads between the closing switch and the nearest switch currently in the open state to energized, and update the power supply to the power supply connected to the closing switch.

[0010] This invention also provides an adaptive topology real-time update system for addressing misordered opening and closing signals of automatic transfer switches in substations, comprising a processor, a memory, and a bus. The memory stores machine-readable instructions executed by the processor. When the system is running, the processor communicates with the memory via the bus, and when the machine-readable instructions are executed by the processor, the adaptive topology real-time update method for addressing misordered opening and closing signals of automatic transfer switches in substations is described above.

[0011] Compared with the prior art, the present invention has the following beneficial effects: Fully compatible and logically clear: Existing strategies are prone to logical inconsistencies when dealing with out-of-order switching signals from incoming line backup to bus tie backup. The topology update strategy proposed in this invention, through innovative design, effectively accommodates such out-of-order signal scenarios, while completely unaffecting the topology analysis logic when normal switch signals or backup automatic transfer switch signals are sent, achieving a unified and robust processing mechanism.

[0012] Real-time, efficient, and seamless upgrades: Traditional methods require introducing delay logic to handle signal out-of-order issues, sacrificing the real-time performance of topology analysis and potentially affecting other functions that rely on the analysis results. In contrast, this solution achieves zero-delay topology updates and only performs special processing on backup signals. It solves the out-of-order problem while upgrading without affecting other functions, ensuring zero negative impact on other system functions and resolving the issue of incorrect backup signal transmission.

[0013] Economical deployment and convenient operation and maintenance: Traditional solutions to similar problems typically require large-scale on-site upgrades and modifications to existing automatic transfer switch (ATS) devices, which are time-consuming, labor-intensive, and costly. This invention only requires a policy upgrade at the system master station to achieve unified and compatible processing of various signals, eliminating the need for on-site personnel to modify a large number of terminal devices one by one, thereby fundamentally saving on equipment modification and operation and maintenance costs. Attached Figure Description

[0014] Figure 1 A flowchart of an adaptive topology real-time update method to address the misordering of opening and closing signals from automatic transfer switches in substations.

[0015] Figure 2 This is a flowchart of the topology update method in step S4.

[0016] Figure 3 This demonstrates a specific example of fault topology analysis. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application; as used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise; furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] An adaptive real-time topology update method for addressing out-of-order switching signals of automatic transfer switches in substations, referencing Figure 1-2 This includes the following steps: Step S1, Switch Marking: Accurately identify the switches related to automatic transfer switch in the power distribution master station system.

[0021] Furthermore, the aforementioned automatic transfer switch specifically refers to the automatic transfer device for backup power in a substation, the common types of which mainly include incoming line backup transfer and bus tie backup transfer. Incoming line backup transfer is used to automatically switch between two incoming power lines, quickly activating the backup line when the main incoming line loses power; bus tie backup transfer is used in a single busbar segmented structure to allow a de-energized busbar to be powered by another normal busbar by closing the bus tie switch. Both are key automation devices for improving power supply reliability.

[0022] Furthermore, the switches related to automatic transfer switch refer to the two incoming power switches and the bus tie switch.

[0023] Step S2, Enable / Disable Status: Maintain the enable / disable status of the automatic transfer switch in the power distribution master station system.

[0024] Furthermore, the "operation / deactivation status" refers to whether the incoming line backup operation and the bus tie backup operation functions of the automatic transfer switch are in normal operating and enabled state. If either the incoming line backup operation or the bus tie backup operation function of the device is in a normal "operation" state, it can be determined that the entire device is in an "operation" state.

[0025] Step S3, Signal Identification: The power distribution master station monitors and receives switch signals in real time and automatically determines whether the signal is a tripping or closing action signal. If it is determined to be a tripping or closing signal, the process continues to step S4; otherwise, no processing is performed.

[0026] Step S4, Topology Update: Based on the judgment result of step S3, the distribution line topology is updated using a differentiated strategy.

[0027] Furthermore, the topology update performs the following sub-steps: Step S41: Determine if there is a closing signal. If it is a closing signal, proceed to step S42; otherwise, proceed to step S44.

[0028] Step S42: Determine if an automatic transfer switch signal is available. If an automatic transfer switch signal is available, proceed to step S43; otherwise, proceed to step S46.

[0029] Step S43: Determine whether the backup automatic transfer function is "activated". If the backup automatic transfer function is "activated", proceed to step S45; otherwise, proceed to step S46.

[0030] Step S44: Update the energized status of all loads downstream of the trip switch to de-energized.

[0031] Step S45: If the backup automatic transfer switch is already energized on one side before closing, then starting from the closing switch, along the opposite line topology direction, update the energized status of all loads between the closing switch and the incoming power switch corresponding to the same backup automatic transfer device to be energized, and update the power supply to the power supply connected to the closing switch.

[0032] Step S46: If the switch is already energized on one side before closing, then starting from the closing switch, along the opposite line topology direction, update the energized state of all loads between the closing switch and the nearest switch currently in the open state to energized, and update the power supply to the power supply connected to the closing switch.

[0033] Repeat steps S3-S4 until all signals have been processed.

[0034] Specific implementation case 1: like Figure 3 As shown, the fault point is located between switches K2 and K3.

[0035] Before the malfunction occurred: Step S1, Switch marking: In the power distribution master station system, K3, K6, and K9 are marked as switches related to automatic transfer switch, where K3 and K9 are two incoming power switches and K6 is the bus tie switch.

[0036] Step S2, Enable / Disable Status: In the power distribution master station system, maintain the enable / disable status of the automatic transfer switch as "enabled".

[0037] At this time, the load on the left side of the bus tie switch K6 is powered by line 1, and the load on the right side is powered by line 2.

[0038] When a fault occurs: A fault occurs between switches K2 and K3. Under normal circumstances, the power distribution master station will receive the K2 trip, K3 trip, and K6 close signals in sequence. The system will update the topology in the following manner.

[0039] Step S3-1, Signal Identification: The power distribution master station receives the K2 opening and closing signal.

[0040] Step S4-1, Topology Update: The signal is a trip signal. Update the energized status of all loads between switches K2 and K6 to de-energized.

[0041] If the signal is not processed, repeat steps S3-S4.

[0042] Step S3-2, Signal Identification: The power distribution master station receives the K3 opening and closing signal.

[0043] Step S4-2, Topology Update: The signal is a trip signal. Since there is no load energized downstream of K3, no operation is required.

[0044] If the signal is not processed, repeat steps S3-S4.

[0045] Step S3-3, Signal Identification: The power distribution master station receives the K6 opening / closing signal.

[0046] Step S4-3, Topology Update: The signal is a closing signal. Since K6 is a backup automatic transfer switch and the backup automatic transfer device is in the "on" state, the energized status of all loads between K6 and the incoming power switch K3 corresponding to the same backup automatic transfer device is updated to energized, and the power supply is updated to line 2.

[0047] The signal has been processed and all processes have ended.

[0048] At this time, the faulty section K2-K3 is powered by line 1, which is consistent with the actual situation, and the centralized feeder automation self-healing strategy can be further implemented.

[0049] If the action signals of K6 and K3 are inconsistent with the actual action sequence of the switches on site due to the fault of the field equipment, the power distribution master station will receive the signals of K2 opening, K6 closing, and K3 opening in sequence. If the conventional topology update strategy is adopted, the system will update the topology in the following way.

[0050] Step S3-1, Signal Identification: The power distribution master station receives the K2 opening and closing signal.

[0051] Step S4-1, Topology Update: The signal is a trip signal. Update the energized status of all loads between switches K2 and K6 to de-energized.

[0052] If the signal is not processed, repeat steps S3-S4.

[0053] Step S3-2, Signal Identification: The power distribution master station receives the K6 opening / closing signal.

[0054] Step S4-2, Topology Update: The signal is a closing signal. Update the energized status of all loads between switches K6 and K2 to energized, and update the power supply to line 2.

[0055] If the signal is not processed, repeat steps S3-S4.

[0056] Step S3-3, Signal Identification: The power distribution master station receives the K3 opening / closing signal.

[0057] Step S4-3, Topology Update: The signal is a trip signal. Update the energized status of all loads between switches K3 and K6 to de-energized.

[0058] At this time, the faulty section K2-K3 is powered by line 2, while before the actual fault, this section should have been powered by line 1. The two states are inconsistent, and the centralized feeder automation self-healing strategy cannot continue to be implemented.

[0059] The signal has been processed and all processes have ended.

[0060] If the topology update strategy proposed in this invention is used, the system will update the topology in the following manner.

[0061] Step S3-1, Signal Identification: The power distribution master station receives the K2 opening and closing signal.

[0062] Step S4-1, Topology Update: The signal is a trip signal. Update the energized status of all loads between switches K2 and K6 to de-energized.

[0063] If the signal is not processed, repeat steps S3-S4.

[0064] Step S3-2, Signal Identification: The power distribution master station receives the K6 opening / closing signal.

[0065] Step S4-2, Topology Update: The signal is a closing signal. Since K6 is a backup automatic transfer switch and the backup automatic transfer device is in the "on" state, the energized status of all loads between K6 and the incoming power switch K3 corresponding to the same backup automatic transfer device is updated to energized, and the power supply is updated to line 2.

[0066] If the signal is not processed, repeat steps S3-S4.

[0067] Step S3-3, Signal Identification: The power distribution master station receives the K3 opening / closing signal.

[0068] Step S4-3, Topology Update: The signal is a trip signal. There is no load energized downstream of K3, no operation is required.

[0069] The signal has been processed and all processes have ended.

[0070] At this time, the faulty section K2-K3 is powered by line 1, which is consistent with the actual situation, and the centralized feeder automation self-healing strategy can be further implemented.

[0071] In summary, if a conventional topology update strategy is used, an error in the sequence of sending the automatic transfer switch opening and closing signals will lead to incorrect line topology updates, thus affecting the execution of the centralized feeder automation self-healing strategy. However, the topology update strategy proposed in this invention can achieve real-time and accurate line topology updates regardless of the correctness of the sending sequence of the automatic transfer switch opening and closing signals, ensuring the reliable and correct operation of the centralized feeder automation system.

Claims

1. An adaptive real-time topology update method for addressing out-of-order switching signals of automatic transfer switches in substations, characterized in that, Includes the following steps: Step S1, Switch Marking: Accurately identify the switches related to automatic transfer switch in the power distribution master station system; Step S2, Enable / Disable Status: Maintain the enable / disable status of the automatic transfer switch in the power distribution master station system; Step S3, Signal Identification: The power distribution master station monitors and receives switch signals in real time, and automatically determines whether the signal is a tripping or closing action signal; if it is determined to be a tripping or closing signal, the process continues to step S4; if it is not such a signal, no processing is performed. Step S4, Topology Update: Based on the judgment result of step S3, the distribution line topology is updated using a differentiated strategy; Step S5: Repeat steps S3-S4 until all signals have been processed.

2. The adaptive topology real-time update method for addressing the misordering of opening and closing signals of automatic transfer switch (ATS) devices in substations, as described in claim 1, is characterized in that... In step S1, the automatic backup switch refers to the automatic switching device for backup power supply in the substation, including incoming line backup switch and bus tie backup switch; wherein, the incoming line backup switch is used to automatically switch between two incoming power supplies, and quickly switch on the backup incoming line when the main incoming line loses power; the bus tie backup switch is used in a single busbar segmented structure to realize that the power-destroyed busbar is powered by another normal busbar by closing the bus tie switch.

3. The adaptive topology real-time update method for addressing the misordering of opening and closing signals of automatic transfer switch (ATS) devices in substations, as described in claim 1, is characterized in that... In step S1, the switches related to automatic transfer switch refer to the two incoming power switches and the bus tie switch.

4. The adaptive topology real-time update method for addressing the misordering of opening and closing signals of automatic transfer switch (ATS) devices in substations, as described in claim 1, is characterized in that... In step S2, the "operation / deactivation status" refers to whether the incoming line backup operation and bus tie backup operation functions of the automatic transfer switch are in normal operation and enabled state; if either the incoming line backup operation or the bus tie backup operation function of the device is in normal "operation" state, it can be determined that the device as a whole is in "operation" state.

5. The adaptive topology real-time update method for addressing the misordering of opening and closing signals of automatic transfer switch (ATS) devices in substations, as described in claim 1, is characterized in that... In step S4, the topology update performs the following sub-steps: Step S41: Determine if there is a closing signal; if it is a closing signal, continue to step S42; otherwise, proceed to step S44. Step S42: Determine if there is an automatic transfer switch signal; if there is an automatic transfer switch signal, continue to step S43; otherwise, proceed to step S46. Step S43: Determine whether the backup automatic transfer function is "activated"; if the backup automatic transfer function is "activated", proceed to step S45; otherwise, proceed to step S46. Step S44: Update the energized status of all loads downstream of the trip switch to de-energized; Step S45: If the backup automatic transfer switch is already energized on one side before closing, then starting from the closing switch, along the opposite line topology direction, update the energized status of all loads between the closing switch and the incoming power switch corresponding to the same backup automatic transfer device to be energized, and update the power supply to the power supply connected to the closing switch. Step S46: If the switch is already energized on one side before closing, then starting from the closing switch, along the opposite line topology direction, update the energized state of all loads between the closing switch and the nearest switch currently in the open state to energized, and update the power supply to the power supply connected to the closing switch.

6. An adaptive topology real-time update system for addressing out-of-order switching signals of automatic transfer switches in substations, comprising a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executed by the processor; characterized in that, When the system is running, the processor and the memory communicate via a bus, and the machine-readable instructions are executed by the processor as described in any one of claims 1 to 5. This is an adaptive topology real-time update method for dealing with the misordering of the opening and closing signals of the automatic transfer switch in a substation.

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