面向新型电力系统的双馈风力发电机并网控制策略研究

双馈感应风力发电机是一种具有三相励磁绕组结构的异步电机，其运行具有变速恒频的特点，因而在新型电力系统中的风力发电领域有着重要的应用价值。利用Park变换，构建了dq坐标系下的数学模型，实现了电机的有功、无功功率的解耦控制。并且利用电压定向矢量控制的方法，实现双馈感应风力发电机的变速恒频运行。之后搭建一套完整的双馈感应风力发电机及其控制系统的模型，并对所提控制策略的效果进行了验证。仿真结果表明，该控制策略对功率指令值具有良好的跟踪效果，并可以在变化的风速下实现稳定的变速恒频运行。

A grid-connected control strategy for doubly-fed wind turbines for new power systems

The doubly-fed induction wind turbine is an asynchronous motor with a three-phase excitation winding structure, and its operation has the characteristics of variable speed and constant frequency, so it has important application value in the field of wind power generation in new power systems. In this paper, a mathematical model under the dq coordinate system is constructed using the Park transformation, and the active and reactive power of the motor are controlled separately, and the voltage-oriented vector control method is used to realize the variable-speed and constant-frequency operation of the doubly-fed induction wind turbine. After that, a complete model of the doubly-fed induction wind turbine and its control system is built, and the effect of the proposed control strategy is verified. The simulation results show that the control strategy has a good tracking effect on the power command value, and can achieve stable variable-speed and constant-frequency operation with changing wind speeds. This work is supported by the Science and Technology Project of China Southern Power Grid Co., Ltd. (No. GZKJXM20210373).