Tạp chí khoa học công nghệ và thực phẩm, T. 19, S. 2 (2019)

Cỡ chữ:  Nhỏ  Vừa  Lớn

NONLINEAR CONTROL OF DYNAMIC VOLTAGE RESTORER TO IMPROVE LVRT CAPABILITY IN WIND TURBINE SYSTEMS

Van Tan Luong, Do Van Si, Nguyen Thi Thanh Truc

Tóm tắt


This paper proposes a nonlinear control of dynamic voltage restorer (DVR) based on a feedback linearization (FL) theory to improve a low-voltage ride-through (LVRT) capability of a doubly fed induction generator (DFIG) wind turbine system. First, the nonlinear model of the system including LC filter is obtained in the d-q synchronous reference frame. Then, the controller design of the linearized model is performed by the multi-input multi-output feedback linearization. The simulation results for the 2 MW-DFIG wind turbine system with the DVR compensation at grid faults gives as good performance as those without grid faults.
Keywords: Doubly-fed induction generator, dynamic voltage restorer, feedback linearization theory, voltage sag, wind turbine.


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