鼠笼异步风机和双馈风机低电压渡过能力对电网电压影响的研究

为了电力系统的安全稳定运行,电网安全运行准则要求风力发电机组在电网故障引起电压跌落时具有一定的低电压运行能力。文章通过一个实例,研究鼠笼异步风机和双馈风机在电网发生故障后风机并网运行与否对电网电压的影响,发现在电压恢复过程中,双馈风机由于具有无功调节能力可向电网发出无功功率,而鼠笼异步风机则吸收无功功率,对电网电压的恢复起负面作用。这就要求电网规划设计中应减少鼠笼异步风机装机容量的比例,同时采取动态无功补偿的措施,以降低鼠笼异步风机在电网发生故障后恢复过程中并网运行对电网电压的负面影响,满足电网对于风力发电系统的要求。

Research into Tide-over Ability of Squirrel-cage Asynchronous Wind-driven Generators and Double-feed Wind-driven Generators Influencing Power-grid Voltage

For the running safety of electrical power systems,power grid safety running regulations requires wind-driven generating units have low-voltage running ability during grid malfunctioning caused by voltage drops.By studying an occurred incident,this article researched into the effects with and without parallel running of Squirrel-cage asynchronous wind-driven generators and double-feed wind-driven generators during a power grid malfunctioning,and discovered that during the voltage recovering,double-feed wind...