Self-adapting three-phase reclosure decision method of ultra-high voltage electric power line with shunt reactor
A transmission line and reclosing technology, which is applied to circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems of difficult research on three-phase adaptive reclosing, achieve favorable stability, simple algorithm, and ensure continuity Effect
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[0026] The present invention provides a method for judging the nature of an adaptive three-phase reclosing fault of an ultra-high voltage transmission line with a shunt reactor. More directly, it is necessary to determine whether the occurrence of an instantaneous fault is an instantaneous fault or not before the three-phase reclosing of the ultra-high voltage transmission line Permanent failure. The invention detects the amplitude of the differential mode voltage in the residual voltage after the three-phase tripping of the line and compares it with the set value, thereby realizing the self-adaptive action of the three-phase reclosing.
[0027] The criterion process is as follows figure 1 Shown: First, a multi-phase fault on the line causes the three-phase circuit breakers on both sides of the line to trip. Determine whether a three-phase trip occurs on both sides of the line. If it is a three-phase fault (including interphase and grounding), take the three-phase on one side of ...
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