Hamiltonian control stabilization for grid-side converters in doubly-fed wind turbines

Based on the Hamiltonian energy theory, the nonlinear models for a class of grid-side converters are transformed into the Hamiltonian models and then the grid-side converter stabilization control laws for doubly-fed wind turbines are contrived such that the closed-loop systems can achieve stability, besides other power improvements. The suggested control method makes it possible to reduce the closed-loop system fluctuations and obtain quicker recovery from voltage dropping, while the direct-current (DC) bus voltage is stabilized swiftly. The Hamiltonian energy approach provides us with a simpler implementation procedure of the controller design, and the resulted controllers have stronger robustness performance. Numerical illustrations show that the proposed Hamiltonian method is effective and satisfactory.