瀑布沟水电站调速器齿盘测频改造

Upgrade of governor toothed disk frequency measuring system at Pubugou Hydropower Station

介绍了瀑布沟水电站调速器残压测频与齿盘测频两种机组频率测量方法的特点。分析了原齿盘测频回路存在的测值不准、波动大等问题的原因,论述了齿盘测频硬件回路的改造方法和改造后的测量效果。

An introduction was made on the characteristics of two kinds of unit frequency measuring methods, i.e. toothed disk and residual voltage frequency measuring which are adopted for the governor of Pubugou Hydropower Station. The original toothed disk frequency measuring circuit rendered inaccurate value with considerable fluctuation. The author presented the upgrade method of toothed disk frequency measuring hardware circuit as well as the effects.