基于光伏储能分离配置的配电网电压薄弱性抑制方法

The separation of PV and energy storage's characteristics of weakness inhibition in the distribution network nodes

针对光伏与储能联合发电系统接入后,易引起配电网节点电压稳定性变化的问题,研究了光伏发电系统和储能系统的分离配置方法。实现光储分离的合理配置,可有效改善现有电网的电压稳定性。针对光伏储能各单元接入位置及容量问题,以薄弱性演化指数最小化为目标,构建光储单元分离位置和配置容量优化模型,对光伏储能单元的配置容量、位置组合方式进行优化。最后,选取青海地区某配电网络建立仿真模型,对建立的光储分离算法进行仿真分析,仿真结果表明,光储单元分离位置和配置容量优化方法有效可行,能够抑制配电网的电压薄弱性。

The connection of photovoltaic and energy storage combined power generation system leads to the change of voltage stability of distribution network nodes. This paper studies the configuration methods of photovoltaic and energy storage separation systems. The rational allocation of optical storage separation can effectively improve the voltage stability of the existing grid. Aiming at the location and capacity of each unit of photovoltaic energy storage, this paper aims to minimize the weak evolution index, and the optimization model of separation location and configuration capacity of optical storage unit is constructed. The configuration, capacity and location combination method of photovoltaic energy storage unit are optimized. Finally, a simulation model of a distribution network in Qinghai is selected to simulate and analyze the optical storage separation algorithm established in this paper. The simulation results show that the optimization method of separation location and configuration capacity of the optical storage unit is feasible and can suppress the voltage weakness of the distribution network better.