摘要
永磁直驱型风电机组为实现低电压穿越,并网变流器一般采用抑制直流电压谐波的不对称运行控制策略。为实现电网不对称信息的准确获取,提出了建立双d-q变换软件锁相环的数学模型。最后,仿真验证了所建模型的正确性与有效性。
Wind power is one of the important ways for using renewable energy. In order to realize low voltage ride through( LVRT),the grid-connected converter generally adopts the asymmetrical control strategy of suppressing DC voltage harmonics,and the accurate acquisition of grid asymmetric information is the premise of this algorithm.In view of the above premise,this paper proposed a mathematical model of double d-q transform software phaselocked loop( SPLL),which provided accurate information for the realization of asymmetric operation control algorithm. The simulation shows that the model is correct and effective.
作者
沈明力
SHEN Mingli(Shanghai Electric Transmission and Distribution Co.,Ltd.,Shanghai 201906,China)
出处
《电器与能效管理技术》
2018年第12期61-66,72,共7页
Electrical & Energy Management Technology
关键词
直驱风电机组
并网变流器
低电压穿越
双d-q变换软件锁相环
direct drive wind turbine
grid-connected converter
low voltage ride through ( LVRT )
double d-q SPLL