微网中并行电压电流多环反馈的单相控制策略  

Voltage-current Multiple Feedback Loops in Parallel Control Scheme for Single-phase Inverters in Microgrid

作　　者：秦铭阳 刘闯[1] 姜明磊[2] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012 [2]国网吉林省电力有限公司经济技术研究院,吉林长春130000

出　　处：《电气传动》2016年第2期49-54,共6页Electric Drive

摘　　要：三相4线制低压微网中,由于接入大量单相负荷,会导致三相不平衡;针对传统单相下垂控制策略一般将电压环电流环串联使用,提出了一种基于并行电压电流多环反馈的微网逆变器控制策略,来实现系统在三相不平衡时的独立稳定控制。该控制策略将带有电压参考值前馈补偿的电压闭环作为单相逆变器的电压整体控制,同时与电流阻尼环并行控制来提高系统的暂态性能。最后利用PSIM实验仿真系统验证了所提出的控制策略在孤网运行模式下的有效性。In the three-phase four-wire microgrid,the large amount of single-phase load will always cause threephase imbalance. According to the traditional droop-controlled single-phase inverters using the voltage-current controlloops in series,a novel voltage-current multiple-feedback loops in parallel control scheme was proposed for themicrogrid to realize the stable three-phase unbalance control independently. The control strategy of closed loop with areference voltage feed-forward compensation voltage as single phase inverter voltage control,at the same time ofparallel current damping control to improve the transient performance of the system.By the end of the article usingPSIM simulation system to verify the effectiveness of the proposed control strategy in microgrid islanded operation.

关 键 词：三相4线制微网 下垂控制 并行电压电流环 前馈补偿 滤波振荡电流 

分 类 号：TM464[电气工程—电器]