青海双馈感应风力发电机组联网运行分析

Analysis on the Operation of Double Fed Induction Wind Generating Set Connected with the Electric Power Grid

新建风电场大多采用双馈感应风力发电机组,实际运行中均采用功率因数cosφ=1的恒定方式运行,没有根据电网运行要求来发挥其自身的无功调控潜能。受风速变动、电网运行方式变化等诸多因素影响,接入点电压往往波动很大,严重时还会影响风电机组的持续联网运行。文章从理论上分析了双馈感应风电机组的无功功率调控范围,构建了面向电网运行要求的风电机组无功功率调控策略。

Most of large wind power stations built newly in Qinghai province use double fed induction wind generating sets which work in a constant operation mode of power factor cosφ = 1 ,then whose reactive power adjustment and control function don＇ t play its role to meet the operation requirement of the power grid. Influenced by factors such as the change of wind speed, the change of power grid operation mode and etc, the voltage at access point often experiences large fluctuation, and in severe conditions that would impact the constant operation of wind generating set connecting to power grid. This paper analyzes theoretically the reactive power adjustment and control range of the double fed induction wind generating set, builds a reactive power adjustment and control strategy for the double fed induction wind generating sets to meet the requirement of the power grid operation.