Analysis of DFIG Stator and Rotor Current in Case of Voltage Swell and Improvement of Reactive Current Configuration
In the high voltage ride through problem of DFIG,in view of the traditional GSC double closed-loop control,the response of the outer loop to DC-link voltage oscillation is slow,and there is a certain delay to the inner loop compensation;and the traditional RSC control has low capacity utilization rate,and in HVRT,the reactive power injected into the rotor is insufficient,etc.,this paper proposed a HVRT control strategy coordinated by GSC single closed-loop control and RSC demagnetization control.The simulation re-sults show that the HVRT control strategy coordinated by GSC single closed-loop and RSC demagnetization not only effectively suppresses the DC-link voltage fluctuation in the HVRT process,but also injected reac-tive power into the rotor side under the condition of ensuring power balance and RSC capacity full utilization,improved the RSC utilization ratio,and made DFIG successfully realize HVRT.
doubly-fed induction generatorhigh voltage ride throughDC-link voltagesingle closed loopdemagnetization control
万方数据
维普
