Partition and segmentation on-line positioning method for small-current grounding faults
A low-current grounding and fault zoning technology, applied in the field of detection, can solve the problems of low reliability, prolonged power outage time, complicated operation, etc., and achieve the effects of high reliability, improved accuracy and simple operation.
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[0032] The implementation of the present invention: the secondary PT (zero sequence voltage) terminal of the busbar is connected to the voltage measuring device on the side of the substation, and the secondary wiring terminal cannot be reversed. Select three current measurement points for the line, and connect the terminals of the zero-sequence current transformer and the A and B phase current transformers to the current measurement device. The secondary CT wiring cannot be reversed. The solar power supply system is installed in the middle of the line pole according to the design.
[0033] After the measuring devices are powered on, they will automatically collect the phase and amplitude of the zero sequence voltage, zero sequence current, and two-phase line current, and send them back to the background monitoring server. After the server receives the data from GPRS, it will store the data. And based on these data to locate the fault line section.
[0034] The root node of the su...
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