机组并网瞬间抢无功现象分析及定值整定策略

Phenomenon Analysis and Setting Value Strategy for Generator Grabing Reactive Power While Synchronizing Power Grid

发电机组并网瞬间从系统大量抢无功功率,引发本侧母线电压和相邻并网其他机组间无功功率的大幅波动等现象。文中主要从理论和无功功率大幅波动现象进行分析,发现二滩水电站同期装置的电压差、励磁调差系数、机端初始电压等参数的定值整定不合理,从而提出对上述参数的一些整定策略。

In order to treat the abnormal voltage fluctuates at the bus bar of the plant,and large reactive power swings between the neighbor gird-connected units,which is caused by instantaneous period of gird connection of the unit.A theoretical analysis to the phenomenon is given.the reason of the improper setting parameter like voltage difference of the synchronization device,reactive compensation of excitation system,the terminal voltage of the unit are found out.And a modifying strategy based on these parameters is discussed.