Distribution network small current neutral grounding line selection method based on multi-source information fusion

Abstract

The invention discloses a distribution network small current neutral grounding line selection method based on multi-source information fusion. The distribution network small current neutral groundingline selection method comprises the steps that a distribution network grounding line selection switch matrix (DGSM) is established to describe feeder and outlet switch models of related buses of all grounding substations in the distribution network; a feeder switch pull path sequence table (FSST) is established to describe the brake separating action sequence of each feeder and outlet switch on the bus; priority adjustment rules are established to perform necessary adjustments on the switch sequence in the feeder switch pull path sequence table (FSST); and according to the distribution networkgrounding line selection switch matrix (DGSM) and the adjusted feeder switch pull path sequence table (FSST), the distribution network grounding fault is subjected to comprehensive line selection processing until a grounding fault feeder is found. The distribution network small current neutral grounding line selection method has good adaptability to a substation line selection device under the conditions of accurate and inaccurate of line selection.

Description

technical field [0001] The invention relates to the field of line selection for small current grounding faults in distribution networks, in particular to a method for line selection for small current grounding faults in distribution networks based on multi-source information fusion. Background technique [0002] Improving power supply reliability and power supply security are two important indicators to measure the power supply service quality of power companies. When a ground fault occurs, it is necessary not only to ensure the continuity of power supply, but also to determine the grounding line and grounding point as soon as possible, so as to quickly isolate the fault and ensure the safety of people and animals. [0003] In my country's medium-voltage distribution network, except for some A+ or A areas that require high power supply reliability, the neutral point is directly grounded or the neutral point is grounded through a small resistance. A small current grounding me...

AI Technical Summary

Problems solved by technology

However, regardless of the active method or the passive method, due to lack of maintenance and changes in the structure of the distribution network, the initial accuracy of the line selection device is relatively high, but as time goes by, the accuracy rate drops significantly

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