同步发电机绝对内电势角测量方法研究

传统的功角测量方法因机端电压过零整形而引入误差,影响了相对内电势角测量的精度。介绍了绝对内电势角的定义,并提出一种测量绝对内电势角,进而获得高精度的相对内电势角的方法。提出的方法不使用机端电压过零整形脉冲,而是与等间隔分频GPS秒脉冲得到的定时脉冲比相,因此,完全不受发电机所处的运行状态的影响,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。

Research on Measurement Method for Absolute Internal Potential Angle of Synchronous Generator

Traditional measurement technique of power angle will influence the accuracy of relative internal potential angle because of the errors brought from determining zero crossing of generator terminal voltage.The definition of absolute internal potential angle is introduced,and a method to measure it and to obtain relative internal potential angle with high accuracy is proposed.The proposed method uses timing pulse by dividing PPS from GPS instead of the pulse from zero crossing of generator terminal voltage.Therefore,it will not be influenced by the operating condition of generator at all,and absolute rotor angle with high accuracy can be obtained in various operating conditions and disturbances.