考虑配网网络结构的分散式风电最大准入容量研究

Research on Maximum Allowable Capacity of Dispersed Wind Farm in Distribution Network Considering Network Structure

分散式风电高渗透率接入配电网可能会导致过电压与过电流等问题。本文提出了一种考虑改变网络结构的分散式风电接入配电网的最大容量确定方法。首先,基于电压与电流约束条件,介绍了分散式风电最大准入容量计算方法。然后,研究了配网网格化优化配置模型及其多目标优化求解算法。通过PG&E 69节点算例,求解并比较网格化操作前后分散式风电最大准入容量,使用最大准入容量变化归一化指标评估配电网网络结构对分散式风电最大准入容量的影响,验证了算法的可行性与有效性,证明了网格化操作有利于提高分散式风电渗透率水平。

Dispersed wind farm access to the distribution network with high penetration may cause problems such as over-voltage and overcurrent.This paper presents a method for determining maximum allowable capacity of dispersed wind farm.Firstly,based on the voltage and current constraints,the calculation method of the maximum allowable capacity of distributed wind farm is introduced.Then,the grid configuration optimization model and its multi-objective optimization algorithm are studied.The PG&E 69 node example is used to verify the feasibility and effectiveness of the algorithm.The maximum allowable capacity change normalization index is used to evaluate the meshed operation of the distribution network,and the results prove that the meshed network is conducive to improve the allowable penetration level.