摘要
根据风机的运行特性,探讨了最大风能的跟踪和捕获原理,分析了变速恒频风力发电系统转子侧、电网侧变换器控制的关键技术。对于转子侧变换器,在分析双馈电机数学模型的基础上,采用定子磁链定向矢量控制技术,推导出了有功、无功功率解耦控制的策略;网侧变换器采用电网电压定向矢量控制技术,根据PWM变换器的数学模型,构建了电流内环、电压外环的双闭环PI控制系统,从而满足了转子侧、电网侧变换器控制目标的要求。
According to the operating characteristics of wind-turbine, this paper discussed the principle of tracing and capturing maximal wind energy. Analysis was made to the key technologies of converter control for wind generation system of variable speed constant frequency at rotor side and grid side. For rotor-side converter, this paper adopted the stator flux oriented vector control technology, deducting the strategy of decoupling control of active and reactive power based on analysis of the mathematical model of a doubly fed induction generator. Grid-side converter adopted grid voltage oriented vector control technology. Double-closedloop PI control system of voltage and current was constructed based on the mathematical model of pulse width modulation converter, so as to meet the requirement of control objectives of rotor-side converter and grid-side converter.
出处
《电工电气》
2012年第7期29-33,37,共6页
Electrotechnics Electric
关键词
双馈风电机组
变速恒频
矢量控制
解耦控制
doubly fed induction generator
variable speed constant frequency
vector control
decoupling control
