Power system separation decision space screening method

Abstract

A power system splitting decision space screening method belongs to the technical field of power safety. The existing power system splitting decision-making methods are limited by the scale of the power grid, or the number of regions of the simplified power grid, and cannot be applied to large-scale power grid online applications. On the premise of not losing the solution feasible solution, the present invention utilizes the physical characteristic that the spatial distribution of the solution feasible solution of the power system has regularity, and does not divide the system area and then aggregate it into nodes, but directly screens the original network The subgraph method to reasonably reduce the size of the decision space. The method will make the existing conventional decoupling strategy search methods applicable to large-scale systems that have not been sufficiently simplified, so that the online decision-making of decoupling strategies in large-scale power grids is really possible. The invention does not rely on human experience, and develops the coherent recognition method that only groups a small number of generator nodes into a large-scale topology recognition method including load nodes, which satisfies the topology analysis of large-scale power grids.

Description

technical field [0001] A power system splitting decision space screening method belongs to the technical field of power safety. [0002] Improving the security and stability of the power system is the top priority of the power operation department. The "Guidelines for Power System Safety and Stability" promulgated by our country stipulates three levels of safety and stability standards for the ability of my country's power grid to withstand large disturbances. When a fault occurs and stable operation cannot be maintained, it is necessary to prevent the system from crashing and minimize load loss. Disassembly is an important means of control to meet the above-mentioned third-level safety and stability standards and prevent the system from collapsing completely. It is the control of the power system to decompose the system into several isolated islands of power balance under the condition of large disturbance and system integrity cannot be maintained. [0003] The present inve...

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Problems solved by technology

However, the simplification method of static partition aggregation currently used will lose a large amount of original information of the system on the one hand, which may bring adverse effects on the feasible solution space, or even cause no solution; on the other hand, static node aggregation often relies on experience and has many problems. High subjectivity reduces its engineering application value

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