用数字技术校正功率测量中电力系统频率的偏差

E. Volodarskyi, A. Voloshko
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引用次数: 0

摘要

具有来自电力来源和用户的非线性和强大电源的供电系统的饱和导致网络中的信号变得非平稳、非线性,并且具有显著的频率波动。这项工作的目的是减少由于电网中的频率偏差而导致的确定用电模式参数的方法误差。文章提出了基于确定频率偏差值和引入校正系数的方法(例如,计算电网中的有功功率和电压)。所提出的方法适用于正弦和非正弦信号形式。结果表明,即使信号含有谐波,并且频率偏离标称值,这些方法也具有高精度。
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Correction for the deviation of power system frequency in the measurement of power by digital techniques
The saturation of power supply systems with nonlinear and powerful sources both from sources and consumers of electricity has led to the fact that signals in the network become non-stationary, nonlinear, and with significant frequency fluctuations. The purpose of the work is to reduce the methodological error of determining the parameters of the mode of electricity consumption due to the frequency deviation in the electrical network. The article proposes methods based on the determination of the frequency deviation value and the introduction of correction coefficients (for example, the calculation of active power and voltage in the electric network). The proposed methods are applied to both sinusoidal and non-sinusoidal signal forms. The results show that these methods have high accuracy, even with signals containing harmonics, and for a frequency deviating from the nominal value.
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