基于改进型比例谐振控制器的三相四线制光伏发电和有源滤波器系统  

Research on Three Phase Four Wire PV-AF System Based on Improved Proportional Resonant Controllers

作　　者：耿乙文[1] 伍小杰[1] 周德佳[2] 徐立华[1] 乔树通[3] 

机构地区：[1]中国矿业大学信息与电气工程学院,徐州221008 [2]海军装备研究院,北京100161 [3]上海交通大学电力传输与功率变换控制教育部重点实验室,上海200240

出　　处：《电工技术学报》2013年第8期142-148,共7页Transactions of China Electrotechnical Society

摘　　要：一种基于改进型PR控制器的PV-AF系统控制策略在静止坐标系下对基波逆变电流以及需要补偿的各次谐波电流进行无静差跟踪,将光伏系统的电能注入电网的同时改善电网电能质量。对比分析了PR控制器与改进的PR控制器特性,根据改进PR控制器各参数对性能指标的影响,对改进的PR控制器进行参数设计。仿真和实验结果表明所提的改进PR控制器可以使电流环控制器更好的跟踪指令电流,对电网频率波动具有较好的适应性,验证了所采用的控制策略的可行性和有效性。For three-phase four-wire PV-AF （photovoltaic power generation and active filter） system, a control strategy based on proportional resonant （PR） controller is proposed. Improved PR controllers in parallel are adopted to track fundamental current and different frequency component of harmonic current to obtain zero steady-state error. With the power of photovoltaic system injecting, the quality＇of grid current is improved. The performance of PR controller and improved PR controller are compared. After analyzing the effect of every parameter of PR on control performance, the parameters are designed. The simulation and experiment results indicate that the current inner-loop controller can be better adapted to the fluctuation of grid frequency and track reference current, which verify the validity and effectiveness of the employed control strategy.

关 键 词：四桥臂并网逆变器 比例谐振控制 谐波补偿 频率波动 

分 类 号：TM615[电气工程—电力系统及自动化]