双馈风力发电机组动态性能改善的控制策略

Control Strategy for Dynamic Performance Improvement of DFIG-based Wind Turbines

针对传统PI电流调节器瞬态响应速度慢和控制带宽窄的问题,提出基于双滞环电流矢量控制技术的电流调节器.分析了基于双滞环电流矢量控制技术的电流调节器的工作原理,导出了双滞环电流矢量控制的开关表.在Matlab/Simu1ink平台中构建了所提出的基于双滞环电流矢量控制技术的电流调节器的仿真模型,仿真结果表明所提出的基于双滞环电流矢量控制技术的电流调节器具有快速的动态响应速度,其动态性能优于传统的PI电流调节器,可满足双馈风力发电机组对有功和无功功率快速调节的要求.

The transient response speed of the traditional PI current regulator is slow, and its control bandwidth is narrow.In view of this, the current regulator-based double hysteresis current vector control technology is proposed.Its operating principle is analyzed, and the switch table of double hysteresis cur-rent vector control is derived.The simulation model of current regulator-based double hysteresis current vector control technique is constructed in Matlab/Simu1ink platform.The simulation results show that the proposed current regulator-based double hysteresis current vector control technology has fast dynamic re-sponse speed, and its dynamic performance is superior to the traditional PI current regulator.Therefore, it can meet the speedy adjustment requirements for active and reactive powers of DFIG-based wind tur-bines.