大型发电机微机失步保护原理和方案

Principle to Prevent from the Out of Synchronism of theLarge-size Generators by Micro-processor Technology

分析大型发电机失步时,利用发电机端测量阻抗作的轨迹作为判据,用单透镜动作特性检测滑极次数,以比相比幅的方法确定振荡中心的位置,再按发电机端测量阻抗轨迹滑过单透镜的时间判断失步的程度,通过微机保护实现大型发电机失步保护。

When analyzing the out of synchronism of thelarge-size generators,the contrail of impedance measured be-tween ends is used as the evidence of judgment.The single lensis employed to check the number of slipper time,and then, thevibration center is located by means of comparison of phasesand extents,at last,the degree of out of synchronism is decidedthrough the contrail of impedance measured between ends di-vided by time of passing across the single lens.The protectionof the out of synchronism of the large-size generators is real-ized through micro-processor technology.