A method to improve the accuracy of high transition resistance ground fault judgment
A technology of ground fault and transition resistance, which is applied in the direction of fault location, measurement of resistance/reactance/impedance, measurement of electrical variables, etc., can solve problems such as difficult to grasp, small steady-state characteristic quantity, etc., to reduce hazards, shorten power failure interval, The effect of improving power supply reliability
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[0025] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0026] The invention receives the voltage and current information collected by the previous equipment of the distribution line, firstly judges the transient first half-wave method for the collected zero-sequence voltage and zero-sequence current and other related data, and then uses the FFT algorithm to calculate the zero-sequence voltage and the zero-sequence current. The magnitude and phase of the zero-sequence current are used for power integral calculation, and the zero-sequence active power is obtained to ju...
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