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

Energies

Xinyin Zhang²  Zaijun Wu²  Minqiang Hu²  Xianyun Li¹  Ganyun Lv¹ 

[1] Nanjing Institute of Technology, No.1 Hongjindadao, Nanjing 211167, China; E-Mails:;School of Electrical Engineering, Southeast University, No.2 Sipailou, Nanjing 210096, China; E-Mails:

关键词: permanent magnet synchronous generator (PMSG);    voltage source converter-HVDC (VSC-HVDC);    low voltage ride-through (LVRT);    coordinated control;    hierarchical control;   

DOI  :  10.3390/en8077224

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.