Low-Voltage Ride-Through Strategy to Doubly-Fed Induction Generator with Passive Sliding Mode Control to the Rotor-Side Converter

Jiayin Xu, Peiru Feng, Junwei Gong, Shenghu Li (), Guifen Jiang and Hao Yang
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Jiayin Xu: Economic & Technical Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230009, China
Peiru Feng: Economic & Technical Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230009, China
Junwei Gong: School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
Shenghu Li: School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
Guifen Jiang: Economic & Technical Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230009, China
Hao Yang: Economic & Technical Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230009, China

Energies, 2024, vol. 17, issue 17, 1-22

Abstract: The doubly-fed induction generator (DFIG) is vulnerable to overcurrent at the stator winding and overvoltage at the DC link due to voltage drop after the grid fault. The large wind farm may have a capacity of several million MWs, whose tripping yields a notable power imbalance and frequency drop in the power systems, which may be avoided by the low-voltage ride-through (LVRT) strategies implemented with the hardware or software. The latter has the merits of low cost and easy to realize, thus studied in this paper. Considering the grid fault uncertainty and DFIG parameters’ correlation, this paper newly introduces the sliding mode structure into the passive control to improve the performance of the inner current control loop of the rotor-side converter (RSC), thus proposing a passive sliding mode control (P-SMC) based RSC control strategy to improve the LVRT capability of the DFIG. The time domain analysis with different fault severities, i.e., voltage drops, at the point of public coupling (PCC) is performed. The simulation results with the P-SMC control or not are obtained and compared to verify the control effect and the robustness of the proposed LVRT strategy. This study is beneficial for maintaining power system security against fast-increasing wind power.

Keywords: doubly-fed induction generator (DFIG); low-voltage ride-through (LVRT); passive control; sliding mode control; control strategy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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