电气传动2017，Vol.47Issue(7)：43-49,7.DOI:10.19457/j.1001-2095.20170709
永磁直驱风机低电压穿越协调控制策略
Coordinated Low Voltage Ride Through Control Strategy for Permanent Magnet Direct Drive Wind Turbine
摘要
Abstract
Under the existing balance control strategy,DC side voltage stability and grid connected active power which has no two times frequency fluctuation can′t take into account,an improved coordinate low voltage ride through strategy was put forward to suit for permanent magnet direct drive wind turbine. The strategy was based on the power balance theory,during the power grid voltage asymmetry fault period,the machine side converter and grid side converter output active were kept consistent in low voltage transient period,to ensure the DC side active power balance;adding the feedforward control loop in DC side,the two times frequency fluctuation of grid connected active power was eliminated,and the DC side voltage could be maintained stable at the same time;revising grid side converter current reference instructions,grid side current was prevented out of range. The permanent magnet direct drive wind power system was built on Matlab/Simulink,and its effectiveness was verified. When grid single/two phase short circuit fault occurs,the strategy can effectively suppress the DC side voltage and grid connected active power fluctuations,reduce the amplitude of the grid connected current,and it is better support system for low voltage ride through.关键词
永磁直驱风机/低电压穿越协调控制策略/不对称故障/2倍工频波动Key words
permanent magnet direct drive wind turbine/coordinated low voltage ride through control strategy/asymmetric fault/two times frequency fluctuation分类
信息技术与安全科学引用本文复制引用
杨艺云,肖静,张阁,肖园园,司传涛..永磁直驱风机低电压穿越协调控制策略[J].电气传动,2017,47(7):43-49,7.基金项目
广西电网有限责任公司科技项目(GXKJ00000006) （GXKJ00000006）
