基于李雅普诺夫方法的高性能并网逆变器控制策略研究  

Research on Control Strategies of High-performance Grid Connected Inverters Based on Lyapunov Method

作　　者：陆韦 闫筱 邓珊珊 杨逍 彭昕 Lu Wei;Yan Xiao;Deng Shanshan;Yang Xiao;Peng Xin(State Grid Shanghai Jiading Power Supply Company,Shanghai 201800,China)

机构地区：[1]国网上海嘉定供电公司,上海201800

出　　处：《电气自动化》2025年第1期40-43,共4页Electrical Automation

基　　金：国网上海市电力公司科技项目(520900230008)。

摘　　要：针对LCL型单相并网逆变器的全局渐进稳定的问题,提出基于李雅普诺夫函数的并网逆变器控制策略,并用比例谐振控制来提升并网电流跟踪精度。首先构建并网逆变器的状态方程,建立李雅普诺夫函数;其次,提出将比例谐振控制器输出作为逆变侧电流参考,解决其构造中微分环节造成的高频噪声影响系统稳定性的问题;再次,用电容电压控制阻尼LCL滤波器的谐振峰;最后,对5 kW单相LCL并网逆变器控制系统进行仿真试验。通过仿真发现:并网逆变器的滤波电感在一定范围内变化超调量不超过3%,表明所提控制策略性能较好。A control strategy based on Lyapunov function was proposed for the global asymptotic stability of LCL single-phase grid connected inverters,and the proportional resonance control was used to improve the accuracy of grid connected current tracking.Firstly,the state equation of the grid connected inverter was constructed and the Lyapunov function was established;secondly,the output of the proportional resonance controller was used as a reference for the inverter side current to solve the problem of high-frequency noise caused by the differential link in its construction affecting system stability;and then,the capacitor voltage was used to control the resonant peak of the damping LCL filter;finally,perform a simulation experiment on the control system of a 5 kW single-phase LCL grid connected inverter.It is shown through simulation that the filtering inductance of the grid connected inverter varies within a certain range:the overshoot does not exceed 3%.It shows that,the performance of the proposed control strategy is good.

关 键 词：LCL型并网逆变器 李雅普诺夫函数 有源阻尼 比例谐振控制器 

分 类 号：TM464[电气工程—电器]