摘要
针对电网频率波动时,并网电流畸变和谐波较大的问题,提出了静止坐标系下LCL并网逆变器的重复控制策略,该策略可有效降低并网电流谐波畸变率;在静止坐标系下,LCL并网逆变器数学模型无耦合现象,省去了复杂的解耦运算,从而该控制策略简单易实现;在确定电路参数的基础上,对重复控制进行了参数设计,并通过仿真试验证明了理论分析的正确性。研究成果对于提高电能质量意义重大。
Severe distortion and harmonics will occur in the output current of inverter when grid frequency fluctuates.A scheme of repetitive control for three-phase grid-connected inverters with LCL filter under stationary coordinate system was proposed.The control strategy could effectively reduce the distortion rate of grid-connected current harmonics.In stationary coordinate system,the mathematical model of grid-connected inverter with LCL filter does not need coupling.Hence,the complicated decoupling operation was omitted,and the control strategy was simple and easy to be implemented.On the basis of determining the experiment parameters of the circuit,the parameters of the repetitive control were designed,and the correctness of the theoretical analysis was proved through simulation experiments.The research results improve the power quality significantly.
作者
张亚超
李大海
张敏
ZHANG Ya-chao1 ,LI Da-hai1 ,ZHANG Min2(1. School of Electrical Engineering, Zhengzhou University of Science and Technology, Zhengzhou 450064, China; 2. Department of Electrical Engineering, Zhengzhou Business Technician Institute, Zhengzhou 450121, Chin)
出处
《水电能源科学》
北大核心
2018年第5期179-183,共5页
Water Resources and Power
基金
河南省科学技术研究重点项目(162102210120)
关键词
重复控制
谐波抑制
静止坐标系
三相并网逆变器
repetitive control
harmonic suppression
stationary coordinate system
three-phase grid-connected inverter
