Investigation on Overvoltage caused by Connecting Shunt Reactors with Vacuum Circuit Breakers in Offshore Wind Farms

2018 3rd Asia Conference on Power and Electrical Engineering

能源学;电工学

Zhou, W.T.^1 ; Xin, Y.L.^1 ; Tang, W.H.^1 ; Huang, J.J.^1 ; Wu, Q.H.^1

School of Electric Power Engineering, South China University of Technology, Guangzhou

510641, China^1

关键词: High frequency HF;    High-frequency modeling;    Offshore winds;    Over-voltages;    Shunt reactors;    Stray capacitances;    Transient over-voltage;    Vacuum circuit breaker;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/366/1/012027/pdf
DOI  :  10.1088/1757-899X/366/1/012027

来源: IOP

【 摘 要 】

Nowadays, the transient overvoltage occurs in offshore wind farms has aroused widespread concern. To improve the existing offshore wind farm model's accuracy in high frequency conditions, this paper proposes a high frequency model of the vacuum circuit breaker as well as a shunt reactor model considering the influence of stray capacitance. After that, a model of a typical offshore wind farm is constructed for the purpose to analyze the overvoltage occurring at bus bars and wind turbine transformers in the process of connecting a shunt reactor. Simulations show that connecting a shunt reactor in offshore wind farms cause overvoltage of high peak and high steepness compared than with those in onshore wind farms.