基于和声算法的含分布式电源的配电网故障定位方法

A Method of Fault Location Algorithm for Distribution Networks with Distributed Generators Based on Harmony Algorithm

评价函数在优化算法对含DG的配电网故障定位中起着关键的作用,其合理的构建不仅能够有效地提高算法故障定位的速度,同时也能够减少定位过程中容易出现错判和漏判的现象。针对含DG配电网复杂的结构特点,建立了一种自适应性强且单、多电源通用的开关函数模型。为了提高搜索效率,引入关于"树"的区域划分方法,剔除无故障电流的无源树枝,降低解的维数,利用快速、准确的和声算法进行全局寻优。通过具体的算例分析,验证了该方法的准确性与快速性。

Evaluation function plays a key role in the optimization algorithm for fault location in distribution network with DG. The reasonable construction can effectively improve the speed of fault location algorithm and reduce the misjudgement in fault positioning. In view of the structural characteristics of complex distribution network with DG, a general switch function model with strong adaptability and single, multiple power supply was established. To improve the search efficiency,＂ tree＂ zoning methods was introduced, eliminating the passive branch free of fault current ,reducing the dimensions of the solution. It applied harmony algorithm on global optimization due to its speed and accuracy ,through concrete example analysis ,the speed and accuracy were verified.