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A New Method Of Frequency Measurement Of Power System

机译:一种电力系统频率测量方法

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Frequency is an important parameter about voltage quality of power system. The paper presents a new method of frequency measurement of power system. Principle of the method is to calculate the interval between two zero point of input wave. Quadratic interpolation technique is used to search the zero point. The input wave being used to search zero point is not the conventional wave of instantaneous sampled-data, but the wave of real or reactive component calculated by Discrete Fourier Transform. The method combines the advantage of Discrete Fourier Transform and quadratic interpolation technique. It eliminates the influence of harmonic and DC component, and has good anti-disturbance performance and precision.
机译:频率是电力系统电压质量的重要参数。本文提出了一种新的电力系统频率测量方法。该方法的原理是计算输入波的两个零点之间的间隔。二次插值技术用于搜索零点。用于搜索零点的输入波不是瞬时采样数据的传统波,而是通过离散傅里叶变换计算的实际或反应分量的波。该方法结合了离散傅里叶变换和二次插值技术的优点。它消除了谐波和直流成分的影响,具有良好的抗干扰性能和精度。

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