An analog switch and its application method

Abstract

The invention discloses an analog switch and an application method thereof. The analog switch is respectively connected with an AC (Alternating Current) standard power supply and a power distribution terminal, wherein the AC standard power supply is used for outputting alternating current, and the alternating current comprises working current and fault current; the power distribution terminal is used for sampling alternating current and sending remote-control signals, and the remote-control signals comprise remote-control switch-on signals and remote-control switch-out signals; the analog switch is used for receiving the remote-control signals and controls the switching of the alternating current according to sampling results of the alternating current and the remote-control signals. By implementing the technical scheme of the analog switch disclosed by the invention, the analog switch executes the corresponding switching action according to the alternating current output by the AC standard power supply and the received remote-control signals sent by the power distribution terminal, cuts off fault current during the switching action, and outputs the corresponding telecommand signals after completing the switching action. The analog switch had the advantages of low cost, and capabilities of receiving remote-control signals and simultaneously outputting and maintaining the telecommand signals, and the analog experiment of cutting off the fault current is realized.

Description

technical field [0001] The invention relates to the field of distribution networks, in particular to an analog switch and an application method thereof. Background technique [0002] In the distribution network of the power system, the distribution terminal under the management of the distribution substation needs to perform remote switching operations on high-voltage switches such as load switches, circuit breakers, and isolating switches on the line in order to cut off the load on the line. , usually the power distribution terminal uses primary equipment such as voltage transformer PT and current transformer CT for sampling, assuming that the voltage range and current range of the low-voltage side of the transformer are [0V, 380V] and [0, 50A] respectively; power distribution The terminal samples the low-voltage side of the transformer, and calculates the primary value according to the transformation ratio of the transformer. If the current of the zero-sequence transformer...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a low-cost switch that can receive remote control signals and simultaneously output and maintain remote signal Analog switch for cutting off fault current and its application method

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