摘要
建立直驱永磁风力发电机的变流器模型及其控制策略,并接入10 kV配电网运行。通过对比并网出口和并网点上、下游的接地故障,探讨了风力发电机组并网对配电网继电保护的影响。同时,在配电网发生电压跌落的情况下,讨论了含全功率变频器的直驱永磁风力发电机组运行特性。结果表明,短路时,直驱永磁风力发电机组能提供稳定短路电流,并且对并网点下游短路电流有助增作用,对上游短路电流的影响较小;电压跌落时,机组能够很好地隔离故障,并且对电网有一定的无功支撑。
A model of direct driven permanent magnet wind turbine connected to a 10 kV distribution network is built,and the control strategies are established. The influence of wind turbine connection on the relay protection of the distribution network is analyzed by comparing the earth faults of output short circuit and the connecting points containing upstream and downstream. Operation characteristics of the wind turbine is discussed by considering the distribution network voltage drop. The results show that the turbine offers continuous current,and increases downstream short circuit current without any effect on the upstream short circuit current. The converter isolates the fault and provides reactive power to the grid when network voltage drops.
出处
《上海电机学院学报》
2014年第3期169-174,共6页
Journal of Shanghai Dianji University
关键词
直驱永磁风力发电机
变流器
配电网
短路电流
电压跌落
direct driven permanent magnet generator
converter
distribution network
short circuit current
voltage drop
