Configuration method for reconstructing self-healing function of traction power supply system

Abstract

The invention provides a configuration method for reconstructing a self-healing function of a traction power supply system, which adopts a hierarchical and hierarchical configuration mode, expands a mode flow step by step by a configuration tool according to an optional power supply network configuration scheme, intelligently selects an applicable action flow according to the current network condition during engineering application, and improves the self-healing function of the traction power supply system. The configuration of reconstructing the self-healing function is simply and quickly completed. According to the method, all action steps involved in the reconstruction self-healing process are switched, and meanwhile, switch attributes such as switch types, action time and synchronous actions are set for each switch, so that the reconstruction self-healing function can be completed more accurately, effectively and quickly. According to the method, real-time reconstruction self-healing process confirmation and modification can be provided, under the condition that a device is not restarted, the mode process is modified through a real-time human-computer interaction interface, the modified and confirmed reconstruction self-healing mode process is sent to a dispatching end for confirmation, and various unexpected field conditions can be flexibly coped with.

Description

Technical Field

[0001] The present invention relates to the field of electrified railway traction power supply systems, and particularly to a configuration method for the reconstruction and 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 put forward the concept of a wide-area protection and measurement and control system with a power supply arm as a unit. As one of the main functions of wide-area protection, the reconstruction and self-healing function can reconstruct the power supply network through operations such as opening and closing line switches after a fault occurs, so as to automatically isolate the faulty section and restore power supply. Due to the diverse structures of power supply networks and the complex fault conditions, the difficulty of reconstruction and self-healing lies in presetting the action process after a fault for each fault condition of the current power supply network. The current common practice is to fixedly write the reconstruction and self-healing mode and action process in the main operating program of the wide-area protection device or in the relevant configuration file. The following problems exist in such a configuration method: (1) It can only adapt to the current network configuration. Once the network structure is changed, such as at a hub substation or a section transfer substation, or the attributes of the intermediate links are changed, such as whether the switch has an operating power supply, the program or configuration file needs to be rewritten. This results in a large amount of time being consumed in each project to specifically configure the reconstruction and self-healing mode and process, which is very cumbersome and error-prone.

[0003] (2) Currently, these configuration methods are all offline configurations and cannot be modified and take effect in real time under special circumstances. Summary of the Invention

[0004] In view of the above problems, the object of the present invention is to propose a configuration method for the reconstruction and self-healing function of a traction power supply system. This method combines a configuration tool and can select to modify the reconstruction and self-healing action process offline or in real time. By adopting a hierarchical configuration method, the number of processes can be increased exponentially to comprehensively cover all applied reconstruction and self-healing action processes, and when applied to a new project, the applicable action process can be intelligently selected according to the current network configuration, so as to simply and quickly complete the configuration of the reconstruction and self-healing function.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: A configuration method for the reconstruction and self-healing function of a traction power supply system. The reconstruction and self-healing mode and process adopt hierarchical configuration, which can be refined layer by layer according to different situations of the traction power supply network. The device program only needs to determine the primary reconstruction and self-healing mode, and the configuration tool expands the mode process step by step according to different network configuration schemes, and finally can automatically or manually select a suitable mode process according to the actual engineering situation. The advantage is that it is not necessary to enumerate all mode processes in the device program, and it can flexibly adapt to various special power supply networks and configuration situations, and continuously enrich the configuration library information, so that the configuration process of the reconstruction and self-healing process becomes more and more convenient and intelligent; specifically includes the following steps: Step 1: Determine the primary mode number according to different fault types; Step 2: The configuration tool completes multi-level expansions such as secondary expansion and tertiary expansion of the primary mode according to the line configuration status, and forms the terminal mode number and process at the end level; Step 3: Manually select or automatically select by the configuration tool according to the current line configuration status to complete the mapping from the primary mode number to the terminal mode number.

[0006] In the reconstruction and self-healing action process, there are not only switch operations such as circuit breakers and disconnectors, but also non-switch operations such as switching the setting value area, switching the operating power supply on and off, and man-machine interaction response. The reconstruction and self-healing configuration method disclosed by the present invention switches all operation steps involved in the reconstruction and self-healing process, which is convenient for unified management. At the same time, corresponding switch attributes are set for each switch, such as whether it is a circuit breaker or a disconnector, whether it is a single-contact switch or a double-contact switch, and whether it supports synchronous operation, etc. This is beneficial to more accurately, effectively and quickly complete the reconstruction and self-healing function during the reconstruction and self-healing process.

[0007] For example, the opening / closing time of a circuit breaker is below 100 milliseconds, the operation time of a disconnector may exceed 10 seconds, and the switching time of the setting value area is below 2 seconds. If the switch operations of the reconstruction and self-healing all adopt a fixed waiting time, then it needs to be set according to the maximum time, and there are many switches involved in the reconstruction and self-healing process, which may lead to a long execution time of the reconstruction and 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 synchronous action for the switches that meet the simultaneous opening / closing conditions, which can greatly reduce the execution time of the reconstruction and self-healing. Another example is that for the difference between a single-contact switch and a double-contact switch, the open position and the closed position can be selected to accurately judge whether the switch is in the open / closed position, etc.

[0008] The present invention classifies the switches in the reconstruction and self-healing action process, and sets corresponding switch attributes for each switch: set the switch type, and different types of switches are set with different operation waiting times; set whether to support switch synchronous operation; set the single-contact or double-contact attribute.

[0009] The present invention pre-sets the basic reconstruction and self-healing mode and process of typical and common traction power supply networks. On this basis, it is convenient to expand the same type of power supply lines and can be flexibly applied to special projects such as hub substations.

[0010] A configuration method for the reconstruction and self-healing function of a traction power supply system proposed by the present invention sets an option in the wide-area protection device to allow real-time modification of the reconstruction and self-healing action process, and can, through a man-machine interaction method, real-time modify and confirm the current reconstruction and self-healing action process.

[0011] In the HMI setting of the wide-area protection device, it is possible to select whether to allow real-time modification of the reconstruction and self-healing action process. If real-time modification is allowed, after the reconstruction and self-healing function is triggered, a man-machine interaction interface will pop up to complete the confirmation or modification of the reconstruction and self-healing process at the device end. After confirmation, the device will re-read the reconstruction and self-healing process and send the modified and confirmed reconstruction and self-healing mode and process to the dispatching end for confirmation. If real-time modification is not allowed, the current reconstruction and self-healing mode and process will be directly sent to the dispatching end for confirmation, and after the dispatching confirmation, the subsequent actions of the reconstruction and self-healing will continue to be completed.

[0012] The real-time reconstruction and self-healing process confirmation and modification function can solve some special situations existing in the prior art. For example, when the power supply network changes temporarily or some switches are taken out of service, etc. After a fault occurs, it is very likely that the reconstruction and self-healing of the power supply network cannot be completed according to the pre-determined reconstruction process, resulting in the inability to quickly restore the power supply in the non-fault area.

[0013] In the face of this situation, the present invention can, without restarting the device, complete the online modification and confirmation of the reconstruction and self-healing action process through real-time man-machine interaction, and can realize the reconstruction and self-healing of the power supply network in a short time.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The reconstruction and self-healing configuration method disclosed by the present invention is different from the way of only configuring a set of action processes for one mode commonly used now. Instead, it sets a first-level mode number for the reconstruction and self-healing modes under different fault types, and each mode is further divided into multiple sets of action processes to adapt to different power supply network situations, and then the only applicable action process is intelligently selected for the current network. It solves the trouble of configuring mode processes only applicable to each project, and as the engineering applications increase, the configuration library can be continuously enriched, so as to more conveniently and quickly complete the reconstruction and self-healing mode configuration.

[0015] 2. The reconfiguration and self-healing configuration method disclosed by the present invention adopts hierarchical classification configuration to form a configuration library suitable for various power supply network configuration conditions. When applied to specific engineering projects, it can achieve intelligent selection according to the actual line configuration conditions and automatically generate configuration files. Compared with manual configuration, the error probability during the configuration process is reduced. The method of using a configuration library plus intelligent selection also reduces the error probability compared with the conventional method of having a different configuration for each project.

[0016] 3. The reconfiguration and self-healing configuration method disclosed by the present invention can provide real-time confirmation and modification of the reconfiguration and self-healing process according to the current fault situation. Compared with the configuration method with a fixed-mode process commonly used now, the method of the present invention can achieve modification of the mode process through real-time human-machine interaction without restarting the device, which is beneficial for flexibly dealing with various unexpected on-site situations and realizing line reconfiguration and self-healing in a short time.

[0017] 4. The reconfiguration and self-healing configuration method disclosed by the present invention sets the switch attribute of the reconfiguration and self-healing action process. It can not only flexibly set the operation waiting time according to different switch types, but also set the switch synchronous action for switches that meet the simultaneous on / off conditions. Compared with the reconfiguration and self-healing method with a fixed waiting time for switch operations commonly used now, the present invention can greatly reduce the execution time of reconfiguration and self-healing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the hierarchical classification configuration reconfiguration and self-healing mode in the embodiment.

[0019] Figure 2 It is a flow chart of the real-time modification of the reconfiguration and self-healing function in the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present invention will be further described in detail below with reference to the accompanying drawings of the specification and specific embodiments.

[0021] As Figure 1 shown, this embodiment discloses a configuration method for the reconfiguration and self-healing function of a traction power supply system. The mode and process of reconfiguration and self-healing adopt hierarchical classification configuration, including the following steps: Step 1: Determine the first-level mode number according to different fault types, such as the failure of circuit breaker 1, the fault of power supply section 1, etc., and determine multiple reconfiguration and self-healing modes from mode 1 to mode n.

[0022] Step 2: The configuration tool completes the multi-level expansion of the primary mode according to different line configuration conditions. According to the secondary judgment conditions, such as whether there is cross-zone operation, in the case of no cross-zone operation in Mode 1, the action process is successively "Switch 1 opens, Switch 2 closes"; in the case of cross-zone operation in Mode 1, the action process is successively "Switch 1 opens, Switch 2 closes, Cross-zone Switch 3 closes". In this way, Mode 1 is divided into 2 processes. When expanding to the third level, according to the third-level judgment conditions, such as whether the disconnector has operating power, in the case of no cross-zone operation and no operating power, the action process is successively "Switch 1 opens, Switch 2 closes"; in the case of cross-zone operation and no operating power, the action process is successively "Switch 1 opens, Switch 2 closes, Cross-zone Switch 3 closes"; in the case of no cross-zone operation and with operating power, the action process is successively "Switch 1 opens, Operating power closes, Switch 2 closes, Operating power opens"; in the case of cross-zone operation and with operating power, the action process is successively "Switch 1 opens, Operating power closes, Switch 2 closes, Operating power opens, Cross-zone Switch 3 closes". In this way, Mode 1 is divided into 4 processes. Other modes are also expanded in the same way. After completing the multi-level expansion in sequence, the end mode number and process are formed at the end level. The end mode number contains bit flags, which is convenient for the next step of automatic selection. At the same time, it is allowed to customize and add some special mode processes.

[0023] Step 3: Manually select or automatically select by the configuration tool according to the actual line configuration of the specific project to complete the mapping from the primary mode number to the end mode number. For example, if the current network situation is that there is a cross-zone interval and no operating power, then the configuration tool can intelligently select the mode process "Switch 1 opens, Switch 2 closes, Cross-zone Switch 3 closes" and map it to the action process of Mode 1.

[0024] As Figure 2 shown, this embodiment discloses a configuration method for the reconstruction and self-healing function of the traction power supply system, which can provide real-time confirmation and modification of the reconstruction and self-healing process. In the HMI settings of the device, it is possible to select whether to allow real-time modification of the reconstruction and self-healing action process. During operation, once the reconstruction and self-healing function is triggered, 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-machine interaction interface will pop up to complete the confirmation or modification of the reconstruction and self-healing process at the device end. After confirmation, the device will re-read the reconstruction and self-healing process and send the confirmed reconstruction and self-healing mode and process to the dispatching end for confirmation. If real-time modification is not allowed, the current reconstruction and self-healing mode and process will be directly sent to the dispatching end for confirmation. After the dispatching confirmation, the subsequent actions of the reconstruction and self-healing will continue to be completed.

[0025] The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the present invention.

Claims

1. A configuration method for the reconstruction and self-healing function of a traction power supply system, characterized in that: The reconfiguration and self-healing mode and process adopt hierarchical configuration, which is refined layer by layer according to different situations of the traction power supply network. The device program only needs to determine the first-level reconfiguration and self-healing mode, and the configuration tool expands the mode process step by step according to different network configuration schemes to form a configuration library suitable for various power supply network configuration conditions, and finally automatically or manually selects the appropriate mode process according to the actual situation of the project; specifically includes the following steps: Step 1: Determine the first-level mode number according to different fault types; Step 2: The configuration tool completes the multi-level expansion of the first-level mode according to the line configuration status, and forms the terminal mode number and process at the last level; Step 3: Manually select or the configuration tool automatically selects according to the current line configuration status to complete the mapping from the first-level mode number to the terminal mode number.

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

3. A configuration method for the reconstruction and self-healing function of a traction power supply system according to claim 1, characterized in that: Set an option in the wide-area protection device to allow real-time modification of the reconfiguration and self-healing action process, and the current reconfiguration and self-healing action process can be modified and confirmed in a human-computer interaction manner; Specifically: When the system triggers the reconfiguration and self-healing function during operation, if real-time modification is allowed at this time, a human-computer interaction interface will pop up to complete the confirmation or modification of the reconfiguration and self-healing process at the device end. After confirmation, the device will re-read the reconfiguration and self-healing process and send the modified and confirmed reconfiguration and self-healing mode and process to the dispatching end for confirmation. If real-time modification is not allowed, the current reconfiguration and self-healing mode and process will be directly sent to the dispatching end for confirmation, and after the dispatching confirmation, the subsequent actions of reconfiguration and self-healing will continue to be completed.

4. A configuration method for the reconstruction and self-healing function of a traction power supply system according to claim 1, characterized in that: All the operation steps involved in the reconfiguration and self-healing action process are used as switch configurations, and the reconfiguration and self-healing process is uniformly executed in the switch mode.

5. A configuration method for the reconstruction and 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 setting value area, and human-computer interaction response.

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

7. A configuration method for the reconstruction and self-healing function of a traction power supply system according to claim 6, characterized in that: Setting the corresponding switch attributes for each switch specifically includes: Setting the switch type, and setting different operation waiting times for different types of switches; setting whether to support switch synchronization operation; setting the single-contact or double-contact attribute.

8. A configuration method for the reconstruction and self-healing function of a traction power supply system according to any one of claims 1-7, characterized in that: Preset the basic reconfiguration and self-healing mode and process of the common traction power supply network, and on this basis, multiple power supply lines of the same type can be expanded and applied to the hub substation.

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