Single-phase earth fault line selection method of power grid with neutral point earthed via arc suppression coil, device and readable storage medium
The invention provides a single-phase earth fault line selection method of a power grid with a neutral point earthed via an arc suppression coil, a device and a readable storage medium. The method comprises the steps of: monitoring a zero sequence voltage U0 of a power distribution network in real t...
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Main Authors | , , , , , , , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
29.11.2019
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Subjects | |
Online Access | Get full text |
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Summary: | The invention provides a single-phase earth fault line selection method of a power grid with a neutral point earthed via an arc suppression coil, a device and a readable storage medium. The method comprises the steps of: monitoring a zero sequence voltage U0 of a power distribution network in real time, and judging whether the zero sequence voltage of the system is greater than 0.15 times of a busrated voltage UN; if so, starting a line selection apparatus to record the zero sequence current data of the first 1/4 power frequency period after a fault; performing frequency distribution processing on the zero sequence current data of various collected lines; and calculating frequency distribution values of the various lines according to data obtained by frequency distribution, and selectinga fault line according to the frequency distribution values. According to the single-phase earth fault line selection method provided by the invention, the fault line selection is performed by using the frequency distribution |
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Bibliography: | Application Number: CN201910970371 |