基于自适应谐振调节器的变速恒频风力发电双馈驱动研究

在常规矢量控制策略中，通常采用空间矢量PWM技术获得较高的电压利用率。但双馈发电机多运行在同步转速 范围内，这使双馈电机调速时的转子电势通常比电网电压低，因此转子侧变流器适合采用正弦波PWM(SPWM)控制。对此，提出一种基于自适应谐振调节器的双馈电机矢量控制策略。该控制策略采用SPWM控制，实现了相对于转子静止(电频率)的abc坐标系中转子电流的无静差控制，且具有常规矢量控制策略中有功功率和无功功率解耦控制的特点。另外，对自适应谐振调节器参数设计及其DSP实现进行了讨论。仿真与试验验证了控制策略的正确性。

Study on Adaptive Resonant Regulator-based Doubly Fed Driver for Variable-speed Constant-frequency Wind-power Generator

In the conventional vector control scheme, the SVPWM means is usually used to modulate DC-link voltage source for excellent DC-link voltage utilization. The operating speed of doubly fed induction generator (DFIG), for variable-speed constant-frequency (VSCF) wind power generation, often only varies from 70% to 130% of the synchronous speed, which makes the electromotive force in the rotor circuits low, comparing with one in the power grid, so sinusoidal PWM (SPWM) means is adaptive for the rotor-side converter. Under this condition, a new vector control method, based on the adaptive resonant regulators, is presented, by which the rotor-side currents in the static abc coordinates, being relative to the rotation speed (electrical angular speed), are controlled without steady-state errors, and the decoupling control between the active power and reactive power, flowing between the stator and the power grid, is also achieved. Adjusting and DSP implementation of the inner-loop controllers are discussed in the paper, too. By simulation and experiments, this control scheme developed by the authors has been validated.