Abstract：In the aspect of power system sinusoidal frequency measurement,the current frequency measurement technology has the defects of low accuracy and weak anti-interference ability.A novel sinusoidal frequency measurement based on the amplitude modulation and the precise amplitude calculation method is proposed.The principle of low-frequency sinusoidal measurement based on amplitude modulation is analyzed.It is pointed out that the mixed-frequency interference is the main cause of the measurement error.By deeply inhibiting the interference of mixed-frequency,the accuracy of sinusoidal frequency measurement is improved.Mathematical calculation,simulation test and the physical experiment results verify the correctness and effectiveness of the proposed method.
李军, 王越超. 一种基于幅值调制的新型电力系统正弦频率测量方法[J]. 电工技术学报, 2015, 30(7): 144-150.
Li Jun, Wang Yuechao. A Novel Power System Sinusoidal Frequency Measurement Method Based on Amplitude Modulation. Transactions of China Electrotechnical Society, 2015, 30(7): 144-150.
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2015, Vol. 30 
