Power supply restoration method for power distribution network under complete shutdown accident of transformer substation

Abstract

The invention discloses a power supply restoration method for a power distribution network under a complete shutdown accident of a transformer substation. The method specifically comprises the following steps: making the power distribution network equivalent to an undirected weighed graph, and making switches of the power distribution network equivalent to sides of the graph, with feeder lines, distribution transform, loads and the like between the switches as vertexes of the undirected weighed graph; searching a proper path for power supply restoration on an operational bus before the accident of the complete shutdown transformer substation through other operational transformer substations; and searching the proper path for transferring the load carried by the complete shutdown transformer substation to other operational transformer substations, so that an assistant decision-making scheme of electricity restoration and load transfer of the substation after the complete shutdown accident of the transformer substation can be provided. Through the method, a power supply restoration scheme under the complete shutdown accident of transformer substation can be rapidly and effectively made; the management and control capacity of a dispatching operator on the power distribution network is improved; and a safe and stable operation of the power distribution network is ensured.

Description

technical field [0001] The invention belongs to the research field of distribution network reconfiguration methods, and in particular relates to a distribution network power supply recovery method under a substation full stop accident. Background technique [0002] The substation is the key to the grid structure, and its safe and effective operation is directly related to the safety and stability of the entire grid system. In order to ensure the safe operation of the substation, the substation is usually powered by dual incoming lines, and at least two main transformers and two bus bars in the substation work at the same time. However, when the main transformer or busbar of the substation undergoes planned maintenance or fails, the substation may have single-line power supply, single busbar or single main transformer operation, etc. At this time, once the main transformer and other equipment in operation are forced to shut down, it will cause The total shutdown accident of ...

AI Technical Summary

Problems solved by technology

However, when the main transformer or busbar of the substation undergoes planned maintenance or fails, the substation may have single-line power supply, single busbar or single main transformer operation, etc. At this time, once the main transformer and other equipment in operation are forced to shut down, it will cause Substation full stop accident, which leads to load reduction and seriously affects the safety and reliability of power supply

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