Method and device for optimizing zoning scheme for power system restoration after a major blackout

Abstract

The invention provides a partitioning scheme optimizing method and device for power system restoration after blackout, and relates to the technical field of power systems. The method comprises the following steps: establishing a first optimizing model on the basis of the target strategy of fewest connecting lines between subsystems in a power grid and pre-established electrical characteristic constraint conditions of the power grid; solving the first optimizing model based on a preset solver to obtain a first partitioning scheme; processing the first optimizing model based on cutting constraint conditions to obtain a second optimizing model; solving the second optimizing model based on the solver to obtain a second partitioning scheme; evaluating the first partitioning scheme and the second partitioning scheme respectively according to established evaluation indexes to obtain evaluation results of the first partitioning scheme and the second partitioning scheme so as to determine a main partitioning scheme and a standby partitioning scheme from the partitioning schemes on the basis of the evaluation results. Therefore, restoration time after power grid faults can be shortened effectively, and high reliability of power grid restoration after the faults is guaranteed.

Description

technical field [0001] The present application relates to the technical field of power systems, in particular, to a method and device for optimizing a partition scheme for power system restoration after a major blackout. Background technique [0002] A series of large-scale power outages such as the South Australian power grid blackout caused by extreme weather and the Ukraine blackout caused by cyber attacks have warned that the risk of large-scale power outages still exists for power grid operators. Actual operating experience at home and abroad shows that reasonable recovery strategies and programs can speed up the process of system recovery and reduce the negative impact of power outages. According to different power grid system structures and power outage scenarios, the recovery strategies are divided into two recovery modes: Build-down and Build-up. Among them, when there is more than one black start power supply in the system, if the system is reasonably partitioned ...

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Problems solved by technology

However, the above scheme only simplifies the power grid into a simple unweighted graph without considering the electrical characteristics of the power grid. In this way, the divided power grid structure does not take into account the electrical characteristics of the power grid, which may lead to a large deviation between the division of the power grid and the actual power grid structure. Large, unreasonable division of the power grid structure, which may lead to a longer recovery time after the power outage, which will bring more negative impacts

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