Three-phase heavy current generator for detecting current transformer on power line

Abstract

The invention discloses a three-phase heavy current generator for detecting a current transformer on a power line, and relates to a detection device for the current transformer on the power line. The generator comprises voltage regulating circuits and current increasing circuits which are connected in series; the voltage regulating circuits consist of a voltage regulating circuit 1, a voltage regulating circuit 2 and a voltage regulating circuit 3 which are connected in parallel; the current increasing circuits consist of a current increasing circuit 1, a current increasing circuit 2 and a current increasing circuit 3 which are connected in parallel; the voltage regulating circuits 1, 2 and 3 are connected in series with the current increasing circuits 1, 2 and 3 respectively; and the current increasing circuits 1, 2 and 3 are provided with interfaces for connecting the current transformers on the three-phase power lines respectively. The generator can realize three-phase independent adjustment through the three voltage regulating circuits and the three current increasing circuits; and a phase sequence correction circuit can ensure three-phase positive sequence power input. The generator can detect the correctness of the transformation ratio selection of a secondary loop of the current transformer and the correctness of the connection of the current transformer.

Description

technical field [0001] The invention relates to a detection device for a current transformer on a power line. Background technique [0002] In order to obtain the operation status of the power circuit, it is necessary to set up a current transformer connected to the secondary equipment on the power line. Through the transformation ratio setting, the operation status of the power line at the measured point can be known. In the detection process, a large current generator needs to be connected to both ends of the current transformer, and the power signal in the circuit is simulated to detect the correctness of the installation of the current transformer. The power line transmits three-phase electricity. When detecting, the existing high current generator can only send one-phase power signal, that is to say, it can only detect three-phase lines one by one. Phase-by-phase detection is difficult to ensure that the installed polarity of the current transformer is consistent; in a...

AI Technical Summary

Problems solved by technology

Phase-by-phase detection is difficult to ensure that the polarity of the current transformer installation is consistent; in addition, it is difficult to judge the correctness of the transformation ratio selection

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