电气传动2019，Vol.49Issue(5)：44-48,5.DOI:10.19457/j.1001-2095.dqcd18566
弱电网下并网变流器的带阻前馈控制策略研究
Research on Band-stop Grid-voltage Feedforward Control Strategy for Grid-connected Converter in Weak Grid Condition
摘要
Abstract
Grid-voltage feedforward is widely used to improve the startup performance of the converter. However, the system stability is reduced quickly as the inductive grid impedance increased when the traditional grid-voltage feedforward is adopted and even the system may be unstable. First,the mathematical model of the system considering the inductive grid impedance and grid-voltage feedforward was established. In addition,the adaptive ability of the converter to the weak grid was analyzed based on the impedance criterion. In order to improve the adaptive ability of the converter to the weak grid,grid-voltage feedforward control method based on the band-stop filter was proposed. Finally,the simulation model of the system was built. The simulation results confirm the validity of the analysis and the effectiveness of the proposed strategy.关键词
并网变流器/感性电网阻抗/电网电压前馈/稳定性/带阻滤波器Key words
grid-connected converter/inductive grid impedance/grid-voltage feedforward/stability/band-stop filter分类
信息技术与安全科学引用本文复制引用
王庆红,谢晓华..弱电网下并网变流器的带阻前馈控制策略研究[J].电气传动,2019,49(5):44-48,5.基金项目
新疆自治区高校科研课题(XJEDU20161069) （XJEDU20161069）
