摘要
大容量风电场接入电网会对系统的正常运行造成一定的影响。本文介绍了变速恒频(VSCF)双馈异步风力发电机(DFIG)的数学模型和控制策略,根据其运行特性分析得到由其组成的大容量风电场接入对电网运行造成的不利影响,包括频率波动增大、电压偏差与电压波动增大、暂态稳定性变差等,并提出一些改善以上影响的措施。在电力系统机电暂态仿真软件PSS/E中建立包含风电场的南通电网模型,在风速变化及电网故障下系统的仿真计算结果验证了理论分析的正确性。
The integration of large capacity wind farm may pose certain influence to power networks. This article introduces the model and control strategy of doubly-fed induction generator （DFIG） belonging to variable speed constant frequency （VSCF）. The analysis of its operational characteristics confirms the facts that integration of large wind farm will impact power networks significantly, including frequency fluctuation, voltage deviation and fluctuations, deterioration of transient stability. Some measures for improvement are proposed. By the model of Nantong grid which is built in PSS/E. The emulation results demonstrate the correctness of the analysis above both in wind speed fluctuation and system fault.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第4期142-149,共8页
Transactions of China Electrotechnical Society
关键词
风电接入
双馈电机
频率波动
电压偏差
暂态稳定
Wind power integration
DFIG
frequency fluctuation
voltage deviation
transient stability
