不平衡三相电网并网逆变器控制策略综述  

Summary of Control Strategy of Unbalanced Three-Phase Power Grid-Connected Inverter

作　　者：刘浩 王蔚[1] Hao Liu;Wei Wang(Changchun University of Technology,Changchun,Jilin,130012,China)

机构地区：[1]长春工业大学,中国吉林长春130012

出　　处：《工程技术与管理（新加坡）》2019年第9期25-28,共4页Engineering Technology & Management

摘　　要：当电网侧电压不平衡时,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。为了有效降低并网逆变器对电网的冲击,提高电网不平衡时并网逆变器并网电流质量,电网在不平衡情况下时,研究并网逆变器控制策略成为了迫切的需求。由不同控制目标,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。最终,对不平衡电网情况下并网逆变器及其控制策略发展趋势进行探讨。When the voltage on the grid side is unbalanced,the output active power and current of the grid-connected inverter will have secondary pulsation and distortion.In order to effectively reduce the impact of grid-connected inverter on power grid and improve the grid-connected current quality of grid-connected inverter when the power grid is unbalanced,it is urgent to study the control strategy of grid-connected inverter when the power grid is unbalanced.According to different control objectives,the existing control strategies of grid-connected inverter are reviewed from the aspects of grid-connected synchronization algorithm,positive and negative sequence separation,current tracking control,harmonic compensation and filter technology.Finally,the development trend of grid-connected inverter and its control strategy under unbalanced power grid is discussed.

关 键 词：电网不平衡 并网逆变器 Goertzel滤波器 控制策略 综述 

分 类 号：TM4[电气工程—电器]