Alternating current and direct current combined single-turn large current generator based on capacitance blocking

Abstract

The invention discloses an alternating current and direct current combined single-turn large current generator based on capacitance blocking. The generator comprises an alternating current source for outputting large alternating current, a direct current source for outputting direct current and an alternating current and direct current combination device, wherein the alternating current and direct current combination device comprises a blocking capacitance cabinet and a monitoring and analyzing unit; the alternating current source and the direct current source are respectively connected with the blocking capacitance cabinet to form an alternating current and direct current stacked common branch circuit; the common branch circuit flows through a primary side of a measured current mutual inductor; and the monitoring and analyzing unit is connected with a current output end, a voltage output end and a temperature output end of the blocking capacitance cabinet. According to the generator, an alternating current source circuit and a direct current source circuit to form the alternating current and direct current stacked common branch circuit, and a modular design is adopted, so that the generator is convenient to assemble and move and practical, and the current mutual inductor is conveniently subjected to direct current magnetic biasing or remanence experimental study.

Description

technical field [0001] The invention relates to a single-turn AC-DC synthetic high-current generator based on capacitive DC blocking for experimental research on DC bias or residual magnetism of a current transformer, belonging to the technical field of electric power detection. Background technique [0002] The current transformer plays an important role in providing signals for subsequent measurement, protection and monitoring equipment in the substation, and its operation stability is particularly important. DC bias and various residual magnetism will aggravate the oversaturation magnetization of the current transformer core. As a result, the magnetic permeability of the current transformer in operation decreases, and the actual error value becomes larger, which exceeds the range of the accuracy level of each winding, affects the fairness of trade settlement and even causes the relay protection device to malfunction. If the current signal is taken from a current transform...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems existing in the AC / DC synthetic large current generating device on the primary side during the working process of simulating the current transformer in the prior art

Images