电气传动2017，Vol.47Issue(6)：40-44,5.DOI:10.19457/j.1001-2095.20170609
弱电网下单周控制LCL并网逆变器控制策略研究
Control Strategy of Grid-connected Inverter with LCL Filter Based on One?cycle Control in Weak Grid
摘要
Abstract
The influence of high and changing grid impedance on grid-connected inverter control system is unneglectable in weak grid. A feedback control of dual loops with inner loop of capacitive current and outer loop of grid-connected current and the technology of bipolar pulse modulation and control by one?cycle control(OCC)were adopted. Based on that,a feedback loop was added to adjust the carrier wave amplitude in OCC technology. In one switching cycle,the reference signal was deemed unchanging. Therefore,the inverter′s voltage could be adjusted by adjusting the carrier wave amplitude and the quality of grid-connected current could be improved. Through Matlab/Simulink,a model of grid-connected inverter with LCL filter was built in weak grid,the results of simulation analysis verify the feasibility that the strategy can improve the quality of grid-connected current availably when the grid impedance changes within a certain range.关键词
弱电网/单周期控制/并网逆变器/LCL滤波器/双闭环控制Key words
weak grid/one⁃cycle control/grid⁃connected inverter/LCL filter/dual⁃loop control分类
信息技术与安全科学引用本文复制引用
杨旭红,何超杰..弱电网下单周控制LCL并网逆变器控制策略研究[J].电气传动,2017,47(6):40-44,5.基金项目
上海市电站自动化技术重点实验室开放课题(13DZ2273800) （13DZ2273800）
上海市科技创新行动技术高新技术领域重点项目(14511101200) （14511101200）
上海市重点科技攻关计划(上海市科委地方院校能力建设项目) (14110500700) （上海市科委地方院校能力建设项目）
国家自然科学基金(61203224) （61203224）
上海自然科学基金(13ZR1417800) （13ZR1417800）
