同步发电机绝对转子角测量方法研究

Research of Synchronous Generator Angle Measurement

本文介绍了同步发电机绝对转子角的定义,提出了一种测量绝对转子角,进而获得高精度的相对转子角的方法;此方法不使用机端电压过零整形脉冲,而是将机组键相脉冲与GPS定时脉冲比相,并能够自动整定初始位置角,因此,测量结果不受发电机运行状态的影响,能够在各种运行方式和扰动情况下获取高精度的绝对转子角。本文提出的方法已在大量火电厂、水电厂工程中实际应用,效果良好。

The definition of generator angle is proposed in this paper. A new method to deduce generator angle by using rotor rotation signal (RRS) is illustrated, which compares the phase difference between GPS timing pulse and RRS. Using only mechanical signal, the technique unfreezes limitation of zero-cross of generator terminal voltage during transient process. Automatic correction of initial generator angle is also proposed .A equipment has been developed and installed in many power plants. The result shows the method effective.