Automatic regional power grid voltage reactive power control method based on regional strategy optimization

Abstract

The invention discloses an automatic regional power grid voltage reactive power control method based on regional strategy optimization. The method includes the following steps of automatic region division, state preprocessing, generation of a strategy set, strategy evaluation, strategy optimization and obtaining of the optimal strategy through calculation of an evaluation function, and thus reactive power control is carried out on regional power grid voltage. According to the method, voltage reactive power optimal control of the whole power grid is decomposed into independent regions to be respectively optimized, after the regions are formed, calculation and strategy optimization are carried out on the various regions respectively, dependency on measurement accuracy of the whole power grid and the state estimation yield of the whole power grid can be reduced, and whole-grid data transmission interfaces cannot be influenced due to poor measurement quality of a part of regions and inaccurate parameters; the number of calculation models is reduced, calculation scales are reduced, and the calculating speed is increased.

Description

technical field [0001] The invention relates to an automatic voltage and reactive power control method of a regional power grid, in particular to an automatic voltage and reactive power control method of a regional power grid based on regional strategy optimization, and belongs to the technical field of electric power. Background technique [0002] At present, the control strategy algorithm of regional power grid AVC generally adopts the expert control algorithm based on the principle of nine-area diagram or seventeen-area diagram. It can effectively improve the qualification rate of the system voltage and power factor, but it is slightly insufficient in optimizing the system network loss and other economics; another method, the AVC system based on the whole network reactive power optimization calculation can provide theoretical basis for the current grid section. The optimal solution of , has higher requirements on basic data and state estimation. In addition, in the ground...

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Problems solved by technology

[0002] At present, the AVC control strategy algorithm of the regional power grid generally adopts the expert control algorithm based on the principle of the nine-area diagram or the seventeen-area diagram, and takes the bus voltage, gate power rate and station power rate as the control objectives. It can effectively improve the qualification rate of system voltage and power factor, but it is slightly insufficient in terms of economy such as optimizing system network loss; another method, the AVC system based on the reactive power optimization calculation of the whole network can provide a theoretical basis for the current grid section. The optimal solution has high requirements for basic data and state estimation. In addition, it is easy to cause frequent movements of equipment in the AVC system of ground survey mainly based on discrete variables, and the degree of practicality is low.

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