基于改进粒子群算法的含分布式发电配网孤岛划分

Islanding algorithm of distribution system with distributed generations based on improved particle swarm algorithm

分布式电源(DG)在配电网中的比重越来越大,当配电网上级发生故障时,可以将配电网与上级电网断开,利用配电网内部的分布式电源为配电网中重要负荷提供持续稳定供电。为了最大化利用DG资源,同时保障重要负荷优先供电,本文提出了基于改进二进制粒子群的配电网孤岛划分方案。本文以二进制粒子群作为主程序,并对粒子进行组合变异,为了克服粒子群的早熟问题,采用模拟退火算法对粒子群进行优化。本文采用广度优先搜索算法对孤岛进行功率连通性校验。对不满足连通性要求的孤岛进行调整,最后找出最优方案。最后,采用IEEE69节点配电系统进行算例验证,算例结果表明本文算法的优越性。

The proportion of DG in the distribution network is growing.When the fault in power network occurs,the power supply for key load in the distribution network can be sustained by DG after the distribution network and the power network is separated.To maximize the use of DG and ensure the power supply for key load,a new strategy for island partitioning based on the improved binary particle swarm algorithm is proposed in this paper.This paper takes the binary particle swarm algorithm as the main program,and takes the particle combined and mutated.To overcome the premature problem of particle swarm algorithm,simulated annealing algorithm is used to optimize the particle swarm algorithm.In this paper,the connectivity of single island power is verified by the breadth-first search algorithm.Adjusting the island which does not meet the requirement of connectivity,finally the optimal scheme is found.The effectiveness of the proposed method is verified by simulation results of IEEE 69-bus system.