Abstract：Concept of period phase of voltage is put forward, which clears the phase of voltage as zero when it crosses zero with rising edge, and it counts the phase of voltage by accumulating mode at each sampling point. With detection method based on period phase, the phase and amplitude of voltage can be easily derived, and the voltage sag can also be judged exactly. For the detection of phase and amplitude of voltage after sag, two-point method is proposed. The detection methods introduced in this paper have the advantages such as easy to realize and calculate, and quick dynamic response. The methods apply to the voltage detection of three-phase and single-phase DVRs. Simulation and experimental results verify the validity of the method.
刘海春, 徐立智, 谢少军. 基于周期相位的电压跌落检测方法[J]. 电工技术学报, 2009, 24(9): 186-190.
Liu Haichun, Xu Lizhi, Xie Shaojun. Detection Method of Voltage Sag Based on Period Phase. Transactions of China Electrotechnical Society, 2009, 24(9): 186-190.
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2009, Vol. 24 
