双馈感应发电机机侧变换器直接功率控制策略比较研究

对双馈感应发电机(DFIG)的两种直接功率控制(DPC)策略进行比较研究。根据DFIG的数学模型,导出对DFIG进行DPC的统一控制模型；首先设计基于滞环比较器的直接功率控制(HCDPC)策略,采用开关型滞环控制器,直接实现定子有功功率和无功功率的解耦控制；其次将SVM技术应用于DPC,提出SVMDPC策略,根据DFIG定子有功、无功功率偏差,采用PI调节器,直接实现定子有功、无功功率的解耦控制；最后对两种DPC策略进行试验研究,验证了两种DPC策略的正确性和可行性,并对其控制性能进行了对比评估。

Comparative Study on DPC Strategy of DFIG GridSide Converter

Two kinds of direct power control strategy of Doublyfed Induction Generator (DFIG) were presented and made Comparative Study on their performance. According to the mathematical model of DFIG, The direct power control (DPC) model for DFIG was deduced. Firstly, the direct power control based on hysteresis controller (HCDPC) strategy was presented, it implements directly decoupling control between DFIG stator active power and reactive power by hysteresis controller. Secondly, the SVMDPC strategy was designed by applying the SVM technology to DPC. It had no rotor current control loop to implement directly decoupling control between DFIG stator active power and reactive power by PI controller. Finally, simulations and experiments did done for HCDPC and SVMDPC to verify its correctness and feasibility and compare its control performance.