Coordinated Control Strategies of VSC-HVDC-Based Wind Power Systems for Low Voltage Ride Through

Xinyin Zhang, Zaijun Wu, Minqiang Hu, Xianyun Li and Ganyun Lv
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Xinyin Zhang: School of Electrical Engineering, Southeast University, No.2 Sipailou, Nanjing 210096, China
Zaijun Wu: School of Electrical Engineering, Southeast University, No.2 Sipailou, Nanjing 210096, China
Minqiang Hu: School of Electrical Engineering, Southeast University, No.2 Sipailou, Nanjing 210096, China
Xianyun Li: Nanjing Institute of Technology, No.1 Hongjindadao, Nanjing 211167, China
Ganyun Lv: Nanjing Institute of Technology, No.1 Hongjindadao, Nanjing 211167, China

Energies, 2015, vol. 8, issue 7, 1-19

Abstract: The Voltage Source Converter-HVDC (VSC-HVDC) system applied to wind power generation can solve large scale wind farm grid-connection and long distance transmission problems. However, the low voltage ride through (LVRT) of the VSC-HVDC connected wind farm is a key technology issue that must be solved, and it is currently lacking an economic and effective solution. In this paper, a LVRT coordinated control strategy is proposed for the VSC-HVDC-based wind power system. In this strategy, the operation and control of VSC-HVDC and wind farm during the grid fault period is improved. The VSC-HVDC system not only provides reactive power support to the grid, but also effectively maintains the power balance and DC voltage stability by reducing wind-farm power output, without increasing the equipment investment. Correspondingly, to eliminate the influence on permanent magnet synchronous generator (PMSG)-based wind turbine (WT) systems, a hierarchical control strategy is designed. The speed and validity of the proposed LVRT coordinated control strategy and hierarchical control strategy were verified by MATLAB/Simulink simulations.

Keywords: permanent magnet synchronous generator (PMSG); voltage source converter-HVDC (VSC-HVDC); low voltage ride-through (LVRT); coordinated control; hierarchical control (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: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (8)

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