电测与仪表2017，Vol.54Issue(5)：45-49,61,6.
提高弱电网中光伏并网逆变器稳定性的控制方法
A control strategy to enhance the stability of PV grid-connected inverter in weak grid
摘要
Abstract
With the increasing of distributed energy,the grid becomes weak.Grid impedance leads to interaction between the inverter and grid,which will affect inverter stability and threaten the safety operation of the system.The influence of grid impedance on the system stability was analyzed from the view of phase margin.In order to enhance the stability of the system with grid impedance variation,a variable gain control strategy based on the neural network is proposed.After using the phase compensation network,in order to maximize the phase margin with grid impedance variation,a nonlinear model based on radial basis function neural network was built to regulate the cutoff frequency.The result of simulation validated the theoretical analysis in the paper.关键词
光伏并网逆变器/神经网络/弱电网/变增益控制/稳定性Key words
PV grid-connected inverter/neural network/weak grid/variable gain control/stability分类
信息技术与安全科学引用本文复制引用
孙如田,郑松..提高弱电网中光伏并网逆变器稳定性的控制方法[J].电测与仪表,2017,54(5):45-49,61,6.基金项目
国家自然科学基金资助项目(61304211) （61304211）
