摘要
对带有撬棒保护(Crowbar)电路的双馈风机系统进行研究。在电网发生三相对称短路故障时,为了提高其在电网故障时的低电压穿越能力,在应用双PWM变换器并联的基础上,提出在直流侧增加超级电容器的控制方案。该方案能够减小机组的电压电流波动,抑制直流侧产生过电压,增强系统的低电压穿越能力。仿真表明,改进控制方案的合理有效。
When symmetrical three-phase short circuit fault in the net occurs, in order to improve the low voltage ride-through capability for doubly-fed induction wind turbine with a crowbar circuit, this paper proposed a control scheme in the DC-side added super capacitor energy storage circuit based on the application in parallel on dual PWM converter. And in this control strategy it can give full play to stabilize voltage and current output, reduce the DC-side over voltage efficiently and improve the low voltage ride-through capability of the system. Simulation results show that the improved control scheme is reasonable and effective.
出处
《辽宁工业大学学报（自然科学版）》
2015年第2期82-86,共5页
Journal of Liaoning University of Technology(Natural Science Edition)
