Temporary overvoltage classified identifying method of power distribution network and device thereof
A classification identification and overvoltage technology, applied in the field of distribution network, can solve problems such as low efficiency, low accuracy rate, lack of overvoltage type identification ability, etc., and achieve the effect of simple algorithm, less calculation time and strong adaptability
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[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0042] This embodiment provides a method for classifying and identifying temporary overvoltages in distribution networks, such as figure 1 shown, including the following steps:
[0043] Step S1: after the overvoltage occurs in the distribution network, obtain the waveform sampling data of the bus three-phase voltage and zero-sequence voltage for a period of time before and after the overvoltage occurs;
[0044] Step S2: Calculate the energy contribution rate E of the two power frequency cycles after the fault on the zero-sequence voltage sampling data obtained in step S1, and judge whether E is greater than the threshold value. If so, it is judged as operating overvoltage, and the identification process ends; this step specifically includes the following step:
[0045] Step S21: Calculate the ratio E of the energy of the two cycles of the signal after...
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