抑制微网中谐波电流的逆变器控制策略研究  

Inverter Control Strategy Research of Harmonic Currents Suppression in the Microgrid

作　　者：费科[1] 吴在军[1] 朱皓斌[1] 杨文燮[1] 

机构地区：[1]东南大学电气工程学院,江苏南京210096

出　　处：《电气传动》2013年第4期41-44,共4页Electric Drive

基　　金：国家自然科学基金资助项目(50807008)

摘　　要：针对同时包含非线性负荷和线性负荷的微网,将分布式电源(DG)分为只带线性负载的和带有非线性负载的两类。对于带有非线性负载的DG,提出了一种基于dq坐标瞬时功率理论的谐波电流补偿算法,通过测得的微网内非线性负载谐波电流和逆变器额定功率输出,计算逆变器的参考电流,并采用滞环控制对逆变器进行控制;对只带有线性负载的DG采用传统下垂控制方法。用此种方法实现了该微网系统并网和孤岛模式的平滑切换和两种模式下的谐波抑制,并用Matlab/Simulink验证了该控制策略的有效性。Aimed at the microgrid that contains both non- linear load and linear load, the DGs were divided into two categories.One only contains linear load,the other contains non-linear load.For the DG with non-linear load, a harmonic current compensation algorithm was presented based on dq axis theory of instantaneous power.The reference current of the inverter was calculated through the measured harmonic current and the rated output power of the inverter.And the inverter is controlled by hysteresis control method. And the DG only with linear load is controlled by traditional droop control method.Through this method, the microgrid can be switched smoothly between the modes of grid- connected and island.And the harmonic current can be filtered in both two modes. The effectiveness of the control strategy is verified by Matlab/Simulink.

关 键 词：微网 电能质量 谐波 并网孤岛切换 

分 类 号：TM464[电气工程—电器]