基于智能微网PCS系统功率不平衡补偿研究

Research on Unbalance Compensatin of PCS System Power Based on Smart Microgrid

三相负载不平衡对微网并网具有许多不利影响。本文选取了智能微电网作为研究平台,引入了PCS的双同步旋转系的矢量计算方法,将电流矢量分解成正序和负序的d、q四个矢量,经过4个PI控制器进行无差控制,最后在MATLAB软件仿真中,利用这种方法在三相对称或不对称电压下,载入不平衡负载的3种情况想进行仿真,实验的结果一致表明:PCS的引入的确能够对三相不平衡之后的功率控制具有优化平衡的作用。

Unbalanced three-phase load has many adverse effects on micro grid connected to grid. This paper selects the smart micro grid as a research platform, the introduction of the PCs double synchronous rotating reference frame vector calculation method and the current vector is decomposed into positive sequence and negative sequence D and Q four vector, after four PI controller without difference control. Finally, in the MATLAB software simulation using this method in three-phase symmetric or asymmetric voltage and load unbalanced load of the three kinds of situations to simulation and experimental results consistently show that ： PCS introduced can indeed power control of three-phase imbalance is the balance optimization.