Method for positioning faults of power distribution network based on amplitude analysis of three-phase current
A distribution network fault and three-phase current technology, which is applied to the fault location, detects faults according to conductor types, and measures electricity. It can solve the problems of small electrical components, poor accuracy of distribution network, and affecting fault location. The method is simple , avoid errors, high promotion value effect
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[0033] The content of the invention will be further explained below with reference to the drawings and examples.
[0034] As attached figure 1 As shown, figure 1 A small current single-phase grounding fault system model built for power transient simulation software ATP, where CT is a current transformer installed on a three-phase line, including CTⅠ1, CTⅠ2, CTⅡ1, CTⅢ1, CTⅣ1, and CTⅣ2 It is the current detection transformer of this simulation model. A current transformer is installed at the head end of each branch circuit except the bus bar, and one or more detection points are set for different lengths of the line. In this example, CTIV1 and CTIV2 are current transformers set on the fault path. The named detection points are X0001, X0016, CTⅠ1 is a current transformer set on a non-fault path, and the named detection point is X0036. The test simulates the occurrence of a fault in 0.1s and conducts an accuracy test.
[0035] When a single-phase ground fault occurs in a small-current...
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