System and method for controlling doubly-fed wind power generation grid-side converter
A technology of doubly-fed wind power generation and grid-side converters, applied in wind power generation, single-network parallel feed arrangement, etc., can solve problems such as inability to decouple the system, complex control algorithms, and decoupling damage
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[0049] Such as Figure 1~6 As shown, the present invention is an optimal control system for a doubly-fed wind power grid-side converter (voltage-type PWM converter, PWM-VSR) based on model predictive control to realize unit power factor operation. It consists of the following two modules to form an organic system:
[0050] Module 1. Optimized grid-side current discrete model predictive control (Current-MPC) module;
[0051] Module 2. Improved space vector modulation (SVPWM) module based on control line voltage;
[0052] The structure diagram of the model predictive control principle of the grid-side converter of the present invention is as follows image 3 As shown, among them, the Current-MPC module obtains the first-order difference equation of PWM-VSR after discretization according to the transfer function between the dq-axis current (controlled variable) and the dq-axis control voltage (operated variable) of the grid-side converter As a predictive control model, combine...
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