摘要
为了提高单相光伏并网逆变器的性能,根据其状态平均模型,提出了一种基于李雅普诺夫稳定性理论的并网控制策略。为了说明该控制策略的有效性,分别对其进行了仿真和实验验证,结果表明:基于李雅普诺夫稳定性理论的并网逆变器实现了与电网电压的同频同相,与比例积分(PI)控制结果比较,并网电流波形良好,跟踪误差较小,总谐波畸变率(THD)低。
In order to enhance the performance of single-phase PV grid-connected inverter, the inverter＇s averaged model is established and grid-connected control strategy based on Lyapunov stability theory is proposed.To prove the effectiveness of the control strategy,the simulation and experiment are carried out.It is confirmed that the grid-con- nected inverter based on Lyapunov stability theory has the same frequency and phase with the utility voltage by the simulation and experimental results.Compared with PI controller,the waveform of the grid-connected current is good, the tracking error and the THD are smaller.
出处
《电力电子技术》
CSCD
北大核心
2012年第12期92-94,共3页
Power Electronics
基金
中国石油大学(北京)前瞻导向项目资助(2010QZ03)~~
关键词
逆变器
稳定控制
状态平均模型
inverter
stability control
state-average model
