双馈风力发电机组转子侧变换器滞环矢量控制技术的研究

变速恒频双馈风力发电系统的交流励磁控制是通过转子侧PWM变换器来实现的,因此对转子侧PWM变换器控制策略的研究与整个风力发电系统的运行和控制紧密相连。常规的控制方法十分复杂,且动态响应性能一般。本文采用定子磁链定向矢量技术,引入滞环电流控制,建立了新的转子励磁控制策略,简化了控制过程,提高了动态响应性能。利用PSCAD/EMTDC平台,仿真研究并验证了该控制方案的正确性和有效性。

Study on the Hysteretic Vector Control Technology for the Rotor-Side Converter of Doubly-Eed Wind Generator Unit

The AC excitation control of variable-speed constant-frequency doubly-fed wind energy generation system is achieved by PWM converter in rotor side,so the research on control strategy of PWM converter in rotor side is closely linked with the operation and control of the whole wind energy generation system.The conventional control methods are very complicate and the dynamic respond performance is common.In this paper,the stator flux orientation vector control technology is applied.Meanwhile,hysteretic current control is used and a new rotor excitation control strategy is established,so the control process is simplified and dynamic respond performance is improved.This control scheme is verified correctly and effectively by simulation study in PSCAD/EMTDC platform.