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考虑到水轮发电机转速较慢、极数较多,实现功角精确测量较为困难,提出一种既满足特征大齿又满足均匀齿的测量方法。该方法充分利用齿与齿之间的机械加工误差,寻找出匹配的齿间距,同时采用频率跟踪方法解决了初相角校验时易受频率扰动影响的问题,解决了各种类型齿下直接法测量功角的精度问题。介绍了该方法的总体思路和软件流程,给出了在浙江天荒坪抽水蓄能电站中的功角测量记录曲线,测量结果令人满意。
Considering that the speed of hydro-generator is relatively slow and the number of poles is large, it is more difficult to realize the accurate measurement of power angle. A method of measuring both the large teeth and the uniform teeth is proposed. The method takes full advantage of the machining error between the teeth and the tooth to find out the matching tooth spacing, and adopts the frequency tracking method to solve the problem that the initial phase angle check is easily affected by the frequency disturbance. The method solves the problems of various types of tooth directly Method to measure the accuracy of the power angle. The general idea and software flow of this method are introduced. The power angle measurement record curve of Zhejiang Tianhuangping Pumped Storage Power Station is given, and the result is satisfactory.