摘要
爱尔兰 Arklow 海上风电场的规划容量达到 500 MW,一期工程预计 2003 年末完成,首批安装 7 台 GE 3.6MW双馈型风力发电机组。该机组转子通过交—直—交变频器与电网相连,该回路上的直流环节对系统事故的影响非常敏感;另一方面,大规模的风力发电机群将具有常规发电机组的某些特征,因此,风电场对系统的稳定性也有很大的影响。为了揭示Arklow风电场与爱尔兰全国电网之间的相互作用,本文利用 PSS/E 动态分析软件进行了仿真,并开发了 GE 3.6 MW 风力发电机组模型。结果显示爱尔兰电网发生电气故障很可能导致 Arklow 风电场停运,这是系统运行人员极不愿意看到的。进一步的研究表明:随着风电场容量的增加,风力发电机群抗系统干扰的能力会有所增强而不致停运,但与此同时,系统的暂态稳定水平却会下降。
The planning Arklow Bank Offshore Wind Park has a final installation capacity of 500MW. By the end of 2003,the phase one project will install seven of GE 3.6MW doubly fed induction generator wind turbines, whose rotor connectsto the grid through an AC-DC-AC frequency converter. This link is fairly vulnerable to the system electrical disturbance.On the other hand, a large group of wind turbines already resemble a conventional power plant, and has a significant impacton the stability of main system. To reveal the interaction between the Arklow Bank Offshore Wind Park and the IrishNational Grid, this paper has developed a doubly fed induction generator equipped variable speed wind turbine model basedon the user modelling function of PSS/E. The simulation results indicate that the system events are most likely to cause windturbine tripping off. With the capacity increasing, the wind farm capability against system fault is enhanced. Unfortunately,the system stability level decreases in such cases.
