OW式永磁直驱风电系统不连续脉宽调制∗

摘要

Permanent Magnet Synchronous Generator current ripple in the operation proposed an open winding type permanent magnet direct drive wind power system for discontinuous PWM modulation. Open winding pair was established equivalent switch model PMSG inverter drive system, clarify the decoupled nature of PWM modulation current ripple causes by introducing a“valid” by properly offset voltage vector time effectively solved PMSG machine side of the stator current ripple, realized the optimization of PMSG were converters power quality improvement. Finally, 110kW wind drag and experimental platform for the open winding PMSG continuous PWM modulation method for performance verification, verified the validity of the method in the optimization of PMSG on-grid power quality.%针对中压永磁直驱风电系统( PMSG)运行中存在的电流脉动问题，提出一种OW式永磁直驱风电系统不连续PWM调制方法。建立了OW双逆变器PMSG驱动系统等效开关模型，阐明了解耦PWM调制电流脉动问题的本质原因，引入“有效时间”概念，通过合理地偏移有效电压矢量作用时间，解决了PMSG机侧定子电流脉动问题，实现了PMSG变流器发电品质的优化提高。最后，基于110 kW风力发电对拖试验平台对所提OW PMSG不连续PWM调制方法进行性能验证，验证了该方法对优化PMSG并网电能品质的有效性。