Improved complex power distribution network reactive power optimization method of harmony search algorithm

Abstract

The invention provides an improved complex power distribution network reactive power optimization method of a harmony search algorithm, and the method comprises steps of: building a power distribution network reactive power optimization model; building a harmony memory data warehouse; initializing harmony vectors; calculating a fitness function value of each harmony vector; updating the harmony memory data warehouse; and performing hierarchical clustering for the harmony memory data warehouse, thereby obtaining various clusters. The technical scheme provided by the invention gathers all scenes appeared in historical calculation to build the harmony memory data warehouse, uses a hierarchical clustering thought to guide updating of the harmony vectors and improve availability of calculation, and can realize an effect of reducing total calculation and improving optimization ability.

Description

technical field [0001] The invention relates to the technical field of distribution network operation, in particular to an improved harmony search algorithm and a complex distribution network reactive power optimization method. Background technique [0002] Reactive power optimization can improve voltage quality and reduce network loss. It uses reactive power compensation or adjustment equipment as a control method, and belongs to nonlinear programming problems. The traditional optimization of voltage and reactive power has the following main problems: Due to the hierarchical management of the power grid, there is a problem of repetitive construction of reactive power. The effect is poor; in addition, the traditional reactive power optimization method often has a single function, and it is often slow and poor in convergence when dealing with large-scale distribution networks. Since the distribution network is at the end of the power grid, with many nodes and complex wiring,...

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Problems solved by technology

[0003] The reactive power optimization method of an improved harmony search algorithm for complex distribution networks proposed by the present invention aims to solve a large number of scenarios and calculation results that appear during the operation of the harmony search algorithm, build a harmony memory data warehouse, and use Hierarchical clustering algorithm guides the evolution of harmonic vectors, improves computing utilization and algorithm optimization capabilities, and more quickly and effectively solves reactive power optimization problems in large-scale distribution networks aimed at reducing network losses and voltage deviations, and promotes The development of cutting-edge new technologies in the distribution network has greatly improved the analysis level of distribution network operation, and provided stronger, longer-term and deeper support for power grid production, operation and management from the perspective of distribution network planning, design, and regulation and operation.

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