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

[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.

[发布机构] School of Electric Power Engineering, South China University of Technology, Guangzhou; 510641, China^1

[效力级别] 电工学

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