单相LCL型光伏并网逆变器的控制技术  

Study on Control Technology of Single-phase Grid-connected Inverter Using LCL Filter

作　　者：戴剑丰[1] 赵晋斌[1] 屈克庆[1] 李芬[1] 

机构地区：[1]上海电力学院电气工程学院,上海200090

出　　处：《上海电力学院学报》2014年第6期515-519,共5页Journal of Shanghai University of Electric Power

基　　金：上海市科学技术委员会浦江计划(12PJ1403900);上海市教育委员会科技创新重点项目(13ZZ132)

摘　　要：采用并网电流和电容电流双闭环控制策略对并网电流进行直接控制,与传统的并网电流单环控制相比,相当于引入了虚拟阻抗来增加系统阻尼,从而抑制了谐振,增加了系统的稳定性.对提出的策略进行系统建模,深入分析了所提策略的控制器参数对系统稳定性的影响.仿真结果表明,该策略可有效抑制进网电流谐振,并且具有较高的入网电流功率因数和良好的稳态性能.Dual-loop control strategy with grid current and capacitor current feedback is proposed,which is similar to introducing virtual impedance to increase the system damping eliminating resonance and improving system stability. The system modeling based on proposed control strategy is presented to analyze the influence of controller parameters on its stability. Finally the simulation result illustrates that the strategy can effectively restrain the resonance of grid current,a high in-grid power factor and good steady-state performance are also achieved.

关 键 词：并网逆变器 LCL滤波器 电流双闭环 

分 类 号：TM615[电气工程—电力系统及自动化] TM464