A configuration method for traction power supply system reconfiguration self-healing function

Abstract

The application provides a configuration method for traction power supply system reconfiguration self-healing function, which adopts hierarchical configuration mode, and gradually expands mode flow according to optional power supply network configuration scheme by configuration tool, intelligently selects applicable action flow according to current network condition in engineering application, and realizes simple and rapid completion of reconfiguration self-healing function configuration. All action steps involved in the reconfiguration self-healing flow are switched, and switch type, action time, synchronous action and other switch attributes are set for each switch, which is beneficial to more accurate, effective and rapid completion of reconfiguration self-healing function. The method can provide real-time reconfiguration self-healing flow confirmation and modification, modify mode flow through real-time man-machine interaction interface without restarting the device, and send the modified reconfiguration self-healing mode flow to the dispatching end for confirmation, which is beneficial to flexible response to various unexpected field conditions.

Description

Technical Field

[0001] The present invention relates to the field of electrified railway traction power supply systems, and in particular to a configuration method for reconstructing a self-healing function of a traction power supply system. Background Art

[0002] With the development of traction power supply systems, the new generation of intelligent traction substation automation systems has proposed the concept of a wide-area protection and measurement and control system with power supply arms as units. The reconstruction self-healing function, as one of the main functions of wide-area protection, can reconstruct the power supply network by opening and closing line switches and other operations after a fault occurs, thereby automatically isolating the fault section and restoring power supply. Due to the diverse structures of power supply networks and the complexity of fault conditions, the difficulty of reconstruction self-healing lies in presetting the post-fault action flow for each fault condition of the current power supply network. The current common practice is to fixedly write the reconstruction self-healing mode and action flow into the main operating program of the wide-area protection device or the relevant configuration file. This type of configuration method currently has the following problems:

[0003] (1) It can only adapt to the current network configuration. Once the network structure is changed, such as the hub station or the cross-zone station, or the properties of the intermediate links are changed, such as whether the switch has operating power, the program or configuration file must be rewritten. This results in different projects having to spend a lot of time to configure and reconstruct the self-healing mode and process in a targeted manner, which is very cumbersome and prone to errors.

[0004] (2) Currently, these configuration methods are all offline configurations and cannot be modified and implemented in real time under special circumstances. Summary of the Invention

[0005] To address the above issues, the present invention aims to provide a method for configuring the self-recovery function of a traction power supply system. This method, combined with a configuration tool, allows for offline or real-time modification of the self-recovery process. By employing a hierarchical configuration approach, the number of processes can be exponentially increased to fully cover all previously implemented self-recovery processes. When applied to new projects, the appropriate process can be intelligently selected based on the current network configuration, enabling simple and rapid configuration of the self-recovery function.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a configuration method for the reconstruction self-healing function of the traction power supply system, wherein the reconstruction self-healing mode and process adopt a hierarchical configuration, which can be configured layer by layer according to the different conditions of the traction power supply network. The device program only needs to determine the first-level reconstruction self-healing mode, and the configuration tool will gradually expand the mode process according to different network configuration schemes, and finally automatically or manually select the appropriate mode process according to the actual project situation. The advantage is that there is no need to enumerate all mode processes in the device program, and it can flexibly adapt to various special power supply networks and configuration conditions, and continuously enrich the configuration library information, so that the reconstruction self-healing process configuration process is more and more convenient and intelligent; specifically, it includes the following steps:

[0007] Step 1: Determine the first-level mode number according to different fault types;

[0008] Step 2: The configuration tool completes the multi-level expansion of the first-level mode to the second-level expansion, the third-level expansion, and so on according to the line configuration status, and forms the terminal mode number and process at the final level;

[0009] Step 3: Manually select or allow the configuration tool to automatically select and complete the mapping of the primary mode number to the terminal mode number based on the current line configuration status.

[0010] The reconstruction self-healing process involves not only switching operations such as circuit breakers and disconnectors, but also non-switch operations such as switching fixed-value zones, opening and closing power supplies, and human-machine interaction responses. The reconstruction self-healing configuration method disclosed in this invention converts all operational steps involved in the reconstruction self-healing process into switches, facilitating unified management. Each switch is also assigned corresponding switch attributes, such as whether it is a circuit breaker or disconnector, whether it is a single-contact switch or a double-contact switch, and whether it supports synchronous operation. This facilitates more accurate, efficient, and rapid completion of the reconstruction self-healing function during the reconstruction self-healing process.

[0011] For example, the opening / closing time of a circuit breaker is less than 100 milliseconds, the operation time of an isolating switch may exceed 10 seconds, and the switching time of a fixed value zone is less than 2 seconds. If the switch operations of the reconstruction self-healing all use a fixed waiting time, then it must be set according to the maximum time. However, the number of switches involved in the reconstruction self-healing process is large, which may result in a long execution time for the reconstruction self-healing. The method of the present invention flexibly sets the operation waiting time according to different switch types through the associated switch attributes, and sets the switch synchronization action for switches that meet the simultaneous opening / closing conditions, which can greatly reduce the execution time of the reconstruction self-healing. For example, depending on whether the switch is single-contact or double-contact, the open position and closed position can be selected to accurately determine whether the switch is open / closed, and so on.

[0012] The present invention classifies the switches in the reconstruction self-healing action process and sets corresponding switch attributes for each switch: setting the switch type, with different types of switches setting different operation waiting times; setting whether to support switch synchronous operation; and setting single contact or double contact attributes.

[0013] The present invention presets the basic reconstruction self-healing mode and process of typical commonly used traction power supply networks. On this basis, the same type of power supply lines can be easily expanded and can be flexibly applied to special projects such as hub substations.

[0014] The present invention proposes a configuration method for the reconstruction self-healing function of a traction power supply system, which sets an option in the wide-area protection device to allow real-time modification of the reconstruction self-healing action process. It can modify and confirm the current reconstruction self-healing action process in real time through human-computer interaction.

[0015] In the HMI settings of the wide-area protection device, you can choose whether to allow real-time modification of the reconstruction self-healing action process. If real-time modification is allowed, after the reconstruction self-healing function is triggered, a human-computer interaction interface will pop up to complete the confirmation or modification of the reconstruction self-healing process on the device side. After confirmation, the device will re-read the reconstruction self-healing process and send the modified reconstruction self-healing mode and process to the dispatching side for confirmation. If real-time modification is not allowed, the current reconstruction self-healing mode and process will be directly sent to the dispatching side for confirmation. After the dispatching confirms, the subsequent reconstruction self-healing actions will continue to be completed.

[0016] The real-time reconstruction and self-healing process confirmation and modification function can solve some special situations existing in existing technologies, such as temporary changes in the power supply network or the withdrawal of certain switches from use. After a fault occurs, it is likely that the reconstruction and self-healing of the power supply network cannot be completed according to the predetermined reconstruction process, resulting in the inability to quickly restore power to non-fault areas.

[0017] In this case, the present invention can complete the online modification and confirmation of the reconstruction self-healing action process through real-time human-computer interaction without restarting the device, and can achieve reconstruction self-healing of the power supply network in a short time.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The reconstruction self-healing configuration method disclosed in this invention differs from the currently common practice of configuring a single action flow for each mode. Instead, it assigns a primary mode number to the reconstruction self-healing mode for different fault types. Each mode is divided into multiple action flows to adapt to different power supply network conditions. The only applicable action flow is then intelligently selected for the current network. This eliminates the need to configure a specific mode flow for each project. Furthermore, as the number of project applications increases, the configuration library can be continuously enriched, making reconstruction self-healing mode configuration more convenient and efficient.

[0020] 2. The reconfiguration self-healing configuration method disclosed in this invention utilizes hierarchical configuration to form a configuration library that adapts to various power supply network configuration conditions. When applied to specific engineering projects, it can intelligently select and automatically generate configuration files based on the actual line configuration conditions. Compared with manual configuration, this method reduces the error probability during the configuration process. The use of a configuration library combined with intelligent selection also reduces the error probability compared to the conventional method of independent configuration for each project.

[0021] 3. The disclosed reconstruction and self-healing configuration method provides real-time confirmation and modification of the reconstruction and self-healing process based on the current fault situation. Compared to the currently used fixed-mode configuration method, the disclosed method allows for modification of the mode process through real-time human-computer interaction without restarting the device. This facilitates flexible response to various unexpected field situations and enables line reconstruction and self-healing in a short period of time.

[0022] 4. The reconstruction self-healing configuration method disclosed in the present invention sets the switch attributes of the reconstruction self-healing action process. It can flexibly set the operation waiting time according to different switch types, and set the switch synchronization action for switches that meet the simultaneous opening / closing conditions. Compared with the currently commonly used reconstruction self-healing method with a fixed switch operation waiting time, the present invention can greatly reduce the execution time of reconstruction self-healing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the hierarchical configuration and reconstruction self-healing mode in the embodiment.

[0024] Figure 2 This is a flowchart of the real-time modification and reconstruction of the self-healing function in the embodiment. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 As shown, this embodiment discloses a configuration method for the self-healing function of the traction power supply system. The mode and process of the self-healing function are configured in a hierarchical manner, including the following steps:

[0027] Step 1: Determine the first-level mode number based on different fault types, such as circuit breaker 1 failure and power supply section 1 failure, and determine multiple reconstruction self-healing modes from mode 1 to mode n.

[0028] Step 2: The configuration tool performs multi-level expansion of the first-level mode based on different line configurations. Based on the second-level judgment criteria, such as whether there is an inter-zone crossing, the operation flow for Mode 1 without an inter-zone crossing is "Switch 1 open, Switch 2 closed." For Mode 1 with an inter-zone crossing, the operation flow is "Switch 1 open, Switch 2 closed, and inter-zone switch 3 closed." This results in two different flow patterns for Mode 1. When expanding to the third level, based on the three-level judgment criteria, such as whether the network separation has operating power, the action flow is "Switch 1 open, Switch 2 closed" if there is no crossover and no operating power; "Switch 1 open, Switch 2 closed, crossover switch 3 closed" if there is crossover and no operating power; "Switch 1 open, Operating power closed, Switch 2 closed, Operating power open" if there is no crossover and Operating power, "Switch 1 open, Operating power closed, Switch 2 closed, Operating power open"; and "Switch 1 open, Operating power closed, Switch 2 closed, Operating power open, crossover switch 3 closed" if there is crossover and Operating power. This divides Mode 1 into four flows. The other modes are expanded similarly. After completing multiple levels of expansion, the final mode number and flow are formed at the final level. The final mode number includes a bit flag to facilitate automatic selection in the next step. Customization is also allowed for specific mode flows.

[0029] Step 3: Map the primary mode number to the terminal mode number, either manually or automatically, based on the actual line configuration of the specific project. For example, if the network has a crossover section without an operating power supply, the configuration tool can intelligently select the mode flow of "Switch 1 open, Switch 2 closed, crossover switch 3 closed" and map it to the mode 1 action flow.

[0030] like Figure 2 As shown, this embodiment discloses a configuration method for the reconstruction self-healing function of the traction power supply system, which can provide real-time confirmation and modification of the reconstruction self-healing process. In the HMI setting of the device, it can be selected whether to allow real-time modification of the reconstruction self-healing action process. Once the reconstruction self-healing function is triggered during operation, the mode number and its action process are determined according to the fault type. At this time, if real-time modification is allowed, a human-computer interaction interface will pop up to complete the confirmation or modification of the reconstruction self-healing process on the device side. After confirmation, the device will re-read the reconstruction self-healing process and send the modified and confirmed reconstruction self-healing mode and process to the dispatching end for confirmation. If real-time modification is not allowed, the current reconstruction self-healing mode and process will be directly sent to the dispatching end for confirmation. After the dispatching confirms, the subsequent reconstruction self-healing actions will be completed.

[0031] The above embodiments are only for illustrating the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. A configuration method for reconfiguring the self-healing function of a traction power supply system, characterized by: The reconstruction self-healing mode number and the reconstruction self-healing action process are configured in a hierarchical and graded manner. The configuration is refined layer by layer according to different conditions of the traction power supply network. The device program only needs to determine the first-level reconstruction self-healing mode number. The configuration tool will gradually expand the reconstruction self-healing mode number and the reconstruction self-healing action process according to different network configuration schemes, forming a configuration library that adapts to various power supply network configuration conditions. Finally, the appropriate reconstruction self-healing mode number and reconstruction self-healing action process are automatically or manually selected according to the actual project situation. The specific steps include: Step 1: Determine the first-level reconstruction self-healing mode number based on different fault types; Step 2: The configuration tool completes the step-by-step expansion of the first-level reconstruction self-healing mode number based on the line configuration status, and forms the terminal reconstruction self-healing mode number and the reconstruction self-healing action process corresponding to the terminal reconstruction self-healing mode number at the final level; Step 3: Manually select or allow the configuration tool to automatically select based on the current line configuration to complete the mapping of the first-level reconstruction self-healing mode number to the terminal reconstruction self-healing mode number.

2. The method for configuring the self-healing function of a traction power supply system according to claim 1, characterized in that: The configuration tool adopts a configuration library plus intelligent selection method. When applied to specific engineering projects, it can intelligently select the reconstruction and self-healing action process applicable to the reconstruction and self-healing function under different fault conditions according to the actual power supply system line conditions, and automatically generate configuration files.

3. The method for configuring the self-healing function of a traction power supply system according to claim 1, characterized in that: In the wide area protection device, an option is set to allow real-time modification of the reconstruction self-healing action process. The current reconstruction self-healing action process can be modified and confirmed in real time through human-computer interaction. Specifically: When the system triggers the reconstruction self-healing function during operation, if real-time modification is allowed, a human-computer interaction interface will pop up to complete the confirmation or modification of the reconstruction self-healing action process on the device side. After confirmation, the device will re-read the reconstruction self-healing action process and send the modified reconstruction self-healing action process to the scheduling side for confirmation. If real-time modification is not allowed, the current reconstruction self-healing action process will be directly sent to the scheduling side for confirmation. After the scheduling confirmation, the subsequent reconstruction self-healing actions will continue to be completed.

4. The method for configuring the self-healing function of a traction power supply system according to claim 1, characterized in that: All operation steps involved in the reconstruction self-healing action process are configured as switches, and the reconstruction self-healing action process is uniformly executed using the switch mode.

5. The method for configuring the self-healing function of a traction power supply system according to claim 4, characterized in that: The operation steps include opening / closing the circuit breaker, opening / closing the disconnector, opening / closing the operating power supply, switching the set value area and human-computer interaction response.

6. The method for configuring the self-healing function of a traction power supply system according to claim 4, characterized in that: Classify the switches in the reconstruction self-healing action process and set corresponding switch attributes for each switch.

7. The method for configuring the self-healing function of a traction power supply system according to claim 6, characterized in that: The switch properties corresponding to each switch setting include: Set the switch type. Different types of switches have different operation waiting times. Set whether to support synchronous switch operation. Set single contact or double contact properties.

8. A method for configuring a traction power supply system reconfiguration self-healing function according to any one of claims 1 to 7, characterized in that: The basic reconstruction and self-healing action process of the commonly used traction power supply network is preset, and on this basis, multiple power supply lines of the same type can be expanded to be applied to hubs.

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