电力系统自动化2018，Vol.42Issue(13)：189-195,7.DOI:10.7500/AEPS20171012013
弱电网下并网逆变器自适应H∞控制方法
Adaptive H∞Control Method for Grid-connected Inverters in Weak Grid
马兴 1徐瑞林 1陈民铀 2何国军 1付昂 1董光德1
作者信息
- 1. 国网重庆市电力公司电力科学研究院,重庆市 401120
- 2. 重庆大学电气工程学院,重庆市 400044
- 折叠
摘要
Abstract
In practical applications,the stability and interference suppression performance of the grid-connected inverter,using the traditional robust H∞control method,are often affected by the weak grid characteristics of the power grid.In order to enhance the adaptability of grid-connected inverters to grid impedance changes,this paper presents an improved H∞control method for grid-connected inverters which is suitable for weak grids.A single-phase grid-connected inverter is used as an example to establish a robust H∞control model for a grid-connected inverter under a weak grid and to prove that the weak grid characteristics will cause the system parameter,control input parameter and interference input parameter are perturbed,which affects the stability and interference suppression performance of the system.In order to overcome the influence of weak grid characteristics and improve the stability and interference suppression performance of the system,an improved H∞control method for grid-connected inverter in weak power grid is proposed. In this method, indirect control is introduced to dynamically adjust the voltage of the common connection point and to eliminate the parameter perturbation of the control system,which makes the grid-connected inverter adaptable to the weak grid.Finally,the rationality and validity of the theoretical analysis and the improved H∞control method are verified by the experiments.关键词
弱电网/并网逆变器/H∞控制/间接控制Key words
weak grid case/grid-connected inverter/H∞control/indirect control引用本文复制引用
马兴,徐瑞林,陈民铀,何国军,付昂,董光德..弱电网下并网逆变器自适应H∞控制方法[J].电力系统自动化,2018,42(13):189-195,7.
