电网不平衡情况下并网逆变器控制策略综述  

An Overview on Control Strategies of Grid-connected Inverter under Unbalanced Voltage Conditions

作　　者：阳同光[1,2] 桂卫华[2] 

机构地区：[1]湖南城市学院机械与电气工程学院,益阳413000 [2]中南大学信息科学与工程学院,长沙410075

出　　处：《电工技术学报》2015年第14期241-246,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点资助项目(51037004);国家自然科学基金(51077097);湖南省教育厅资助项目(13A011)

摘　　要：在电网电压不平衡情况下,并网逆变器的输出有功功率和电流将存在二次脉动和畸变。为了提高电网不平衡时并网逆变器并网电流质量,有效降低并网逆变器对电网的冲击,研究不平衡电网情况下并网逆变器控制策略成为了迫切的需求。根据不同控制目标,从并网同步算法、正负序分离、电流跟踪控制、谐波补偿和滤波器技术等方面对现有并网逆变器控制策略进行综述。最后,对不平衡电网情况下并网逆变器发展趋势进行探讨。Under unbalance grid voltage and distortion conditions, the output active power and current of grid-connected inverter will be secondary pulsation and distortion. In order to improve the quality of grid-connected inverter current, reduce the impact of the grid-connected inverter to the grid effectively, research on grid-connected inverter control strategy under unbalanced voltage has become important. In this paper, focus on grid synchronization, extract the positive-negative-sequence frequency current, current control, harmonics and filter, overview of the current control for grid-connected inverter under unbalance voltage conditions is present and evaluated. Furthermore, the trends of the grid inverter under unbalanced grid conditions are discussed.

关 键 词：电网不平衡 并网逆变器 控制策略 综述 

分 类 号：TM315[电气工程—电机]