电工技术学报2012，Vol.27Issue(4)：240-247,8.
电网非理想情况下的双馈风电机组锁相控制
Control of Phase Locked Loop for Wind Power Generation Under Non-Ideal Grid Conditions
摘要
Abstract
With increase of installed wind power capacity,the operation performance of wind power system under non-ideal grid conditions has become a research emphasis.In order to track phase and从 frequency of grid accurately and quickly,this paper presents a new phase locked loop（PLL） method by using delay signal cancellation in the abc coordinate system.Based on the traditional method of software PLL,the delay signal cancellation algorithm is used to eliminate the second fluctuation of the control loop under unbalanced grid condition.A design method for the PLL loop controller is also developed in order to increase the attenuation coefficient of 5th and 7th harmonics.Simulation and experimental results show that the proposed PLL system not only effectively attenuates the loop fluctuation which is caused by non-ideal grid,but also obtain good dynamic performance.The PLL system can provide accurate phase and frequency information for safe and reliable operation of wind turbines under grid faults.关键词
锁相环/电网非理想/风力发电/控制设计Key words
Phase locked loop(PLL)/non-ideal grid/wind power generation/control design分类
信息技术与安全科学引用本文复制引用
刘昌金,徐君,陈敏,徐德鸿..电网非理想情况下的双馈风电机组锁相控制[J].电工技术学报,2012,27(4):240-247,8.基金项目
国家电网公司科技项目 （）
