电池储能系统在改善微电网电能质量中的应用

微电网中的电池储能系统不但可以用于维持微电网的功率平衡,还可用于治理微电网中非线性负荷注入的谐波电流和配电网侧渗透的谐波电压。为充分利用电池储能系统的冗余容量和改善微电网的电能质量,本文提出了电池储能系统的一种多功能控制策略。首先,介绍了主电路的基本结构和各子系统控制指令信号的生成,其次,利用Matlab/Simulink软件搭建了一个由两种微电源、两类负荷和两条支路构成的简单微电网模型,最后在微电网模型中对该多功能控制策略进行了仿真研究。仿真结果表明,在这种控制策略下电池储能系统既可以有效地维持微电网的功率平衡,又能很好地改善微电网的电能质量。

Improvement of Power Quality of Micro-Grids by Battery Energy Storage System

Battery energy storage system(BESS) in microgrids can not only be used to remain power balance of micro-grids,but also to suppress harmonic currents injected by nonlinear loads and harmonic voltages penetrated from distribution network.In order to make the best of redundant capacity of BESS and improve power quality of micro-grids,a multi-function control strategy of BESS is presented in this paper.First of all,the basic structure of main circuit and control command signal generation are introduced,and then a micro-grid model which consists of two type microsources,two kind loads and two branches is constructed with Matlab/Simulink.Finally,in the micro-grid model simulations are eventually performed for the multi-function control strategy.The results show that the battery energy storage system with this control strategy can realize the power balance,as well as improve the power quality of micro-grids magnificently.