微电网分布式电源的选址和定容

Siting and Sizing of Distributed Generation in Micro-Grid

摘要: 分布式电源(Distributed Generation, DG)的选址定容问题是微电网发展中的一个重要研究课题。首先介绍了基于前推回代法的微电网潮流计算，给出了微电网的静态电压稳定指标。然后，在DG接入对各串并联支路电压水平影响的基础上，优选DG布局。同时考虑了网损改善程度及静态电压稳定性改善程度这两个重要指标，来优化DG的容量，并采用带惯性权重的粒子群优化算法(Particle Swarm Optimization, PSO)求解。最后通过算例仿真分析，结果表明采用该方法能有效提高系统的电压水平，降低有功网损，同时提高系统的静态电压稳定性，在分布式电源选址定容的规划阶段具有一定的实用价值。

Abstract: Siting and sizing of Distributed Generation (DG) is an important research topic in micro-grids de-velopment. Firstly, we introduce the power flow method based on back/forward sweep and the static voltage stability index in micro-grid. Then, based on the voltage level of DG access each series and parallel branch, we optimize the DG layout. Simultaneously, taking into account the degree of improvement in power losses and static voltage stability these two important indicators, we optimize DG capacity, using particle swarm optimization (PSO) with inertia weight to solve this problem. Finally, an example simulation results show that this method can effectively improve the voltage level, reduce active power loss, improve static voltage stability of micro-girds, and has some practical value in DG planning stage of siting and sizing.