双馈风力发电机机侧变频器控制策略的研究

Research of Generator Side Convert Control Strategy for Doubly-fed Wind Generator

根据低电压穿越技术的基本特点,以双馈感应发电机组(DFIG)作为研究对象,在电网电压发生不平衡跌落时,对转子侧变流器采用比例-谐振控制,以提高在电网故障时风机不间断运行能力。通过PSIM仿真软件以1.65 MW风机为模型进行仿真并且在1.65 MW风电机组功率试验台进行实验。仿真和实验结果证明在电网电压不平衡跌落时对转子侧变流器采用的比例-谐振控制能够快速、有效地控制转子电流,提高了整个控制系统和风电机组的不间断运行能力,对DFIG风电机组实际运行中具有相当重要的实际应用价值。

According to the basic characteristics of the low voltage ride through, in order to improve uninterrupted operation capability of doublely fed induction generator （DFIG） during power grid voltage unbalanced dips, the proportionalresonance control was used for the rotor side converter.A 1.65 MW DFIG was built as a model for simulation with the PSIM simulation software and a test on the 1.65 MW DFIG power test bed was done. The simulation and experimental results show that the proportionalresonance control for the rotor side converter quickly and efficiently control rotor current and improve the uninterrupted operation capability of the entire control system and the DFIG wind turbine.It has a very important practical applications in the actual operation of the DFIG wind turbine.