The LVRT Control Scheme for PMSG-Based Wind Turbine Generator Based on the Coordinated Control of Rotor Overspeed and Supercapacitor Energy Storage

Xiangwu Yan, Linlin Yang and Tiecheng Li
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Xiangwu Yan: State Key Laboratory of New Energy Power System, North China Electric Power University, Beijing 102206, China
Linlin Yang: State Key Laboratory of New Energy Power System, North China Electric Power University, Beijing 102206, China
Tiecheng Li: State Grid Hebei Electric Power Research Institute, Shijiazhuang 050021, China

Energies, 2021, vol. 14, issue 2, 1-22

Abstract: With the increasing penetration level of wind turbine generators (WTGs) integrated into the power system, the WTGs are enforced to aid network and fulfill the low voltage ride through (LVRT) requirements during faults. To enhance LVRT capability of permanent magnet synchronous generator (PMSG)-based WTG connected to the grid, this paper presents a novel coordinated control scheme named overspeed-while-storing control for PMSG-based WTG. The proposed control scheme purely regulates the rotor speed to reduce the input power of the machine-side converter (MSC) during slight voltage sags. Contrarily, when the severe voltage sag occurs, the coordinated control scheme sets the rotor speed at the upper-limit to decrease the input power of the MSC at the greatest extent, while the surplus power is absorbed by the supercapacitor energy storage (SCES) so as to reduce its maximum capacity. Moreover, the specific capacity configuration scheme of SCES is detailed in this paper. The effectiveness of the overspeed-while-storing control in enhancing the LVRT capability is validated under different levels of voltage sags and different fault types in MATLAB/Simulink.

Keywords: permanent magnet synchronous generator (PMSG); supercapacitor energy storage (SCES); rotor overspeed control; low voltage ride through (LVRT); capacity configuration of SCES (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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