Sliding-Mode Control for a DFIG-Based Wind-Power Generation System with Series Grid-Side Converter under Unbalanced Grid Voltage Conditions

Abstract

In this paper, the power quality in a wind power generation system is studied. It is shown that adding a Series Grid-Side Converter (SGSC) to the Doubly Fed Induction Generator (DFIG) structure and applying a suitable control algorithm will make the system be able to compensate the adverse effects of the voltage unbalance and consequently can improve the power quality. In order to decrease design complexity and implement the control algorithms in the stationary reference frame, a Sliding-Mode Control (SMC) method for controlling of the DFIG system with SGSC is proposed. One of the advantages of the proposed method in this paper is its robustness to parameter variations both in the DFIG and the connected network. Moreover, the designed controller leads to a fast dynamic response. It should be mentioned that, a coordinated control carries out between SGSC with the other DFIG converters. The simulation results approve the validity of the mentioned advantages and the effectiveness of the proposed method.

A new integral-synergetic controller for direct reactive and active powers control of a dual-rotor wind system

“…However, applying this technique leads to large Ps and Qs ripples, THD of current, and variable switching frequency due to hysteresis controllers. 7 The DARPC strategy was designed to control the Ps and Qs of the permanent magnet synchronous generator. 8 Recently, several DARPC strategies law based on a DFIG are presented in literature such as neural DARPC strategy, 9 fuzzy DARPC control, 10 neurofuzzy DARPC strategy, 11 sliding mode-DARPC control, 12 DARPC strategy with classical space vector modulation (CSVM), 13 DARPC control with supertwisting sliding mode (STSM) controllers, 14 DARPC strategy with neural STSM controllers, 15 DARPC strategy based on genetic algorithm (GA), 16 DARPC strategy based on backstepping controller, 17 DARPC strategy based on terminal synergetic controller, 18 DARPC strategy based on third-order sliding mode controller, 19 DARPC strategy based on sliding mode controller (SMC), 20 and the DARPC control with neuro-fuzzy STSM controllers.…”

“…However, applying this technique leads to large Ps and Qs ripples, THD of current, and variable switching frequency due to hysteresis controllers. 7 The DARPC strategy was designed to control the Ps and Qs of the permanent magnet synchronous generator. 8…”