摘要
通过对双馈风力发电机定子功率极限的推导,以及定子输出无功功率与双馈电机损耗关系的分析,提出双馈风力发电机的一种新型控制策略。该方法对励磁电流的不同组合优化选择,将励磁电流平均分配到定子和转子电流,使网侧与转子侧变流器容量相等,互为备用,并综合考虑了双馈风力发电机的运行效率和工况性能。基于所提控制策略,结合网侧变流器的容量设置,对双馈风力发电机的无功调节能力和对接入系统的电压控制作用进行了探讨,提出在不同系统运行状况下的无功选择办法。构建了包含双馈风力发电机组的测试系统,仿真算例结果验证了所提控制策略的正确性和有效性。
Based on the derivation of the power transfer limits of the doubly fed induction generator （DFIG） stator as well as the comprehensive analysis on the relationship between the output reactive power of the stator and generator losses,a novel DFIG reactive power control strategy was proposed.By fully considering the operational efficiency and performance of the DFIG,this approach allocates the exciting current equally to the stator current and the rotor current.Consequently,the capacity of grid side converter （GSC） was the same as that of rotor side converter （RSC）,which made one could be a backup for another.Furthermore,based on the proposed control strategy and regard of the capacity of grid side converter,the DFIG capability to regulate the reactive power and the voltage was studied.Different methods to determine reactive power reference with distinct power system operational states were put forward.A model contained integrated wind power system was constructed.Simulation researches verify the efficiency of the proposed strategy.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第30期87-92,共6页
Proceedings of the CSEE
关键词
双馈发电机
电压控制
无功调节
功率极限
损耗最优化
doubly fed induction generator （DFIG）
voltage control
reactive power regulations
power transfer limits
optimization of losses
