Intermittent induction voltage-withstanding test device and test method for inter-turn insulation test of iron-core electric reactor

Abstract

The invention relates to an intermittent induction voltage-withstanding test device and test method for inter-turn insulation test of an iron-core electric reactor. The test device comprises a controller, an inverter circuit, a chopper circuit and a detection circuit. The controller is connected with a display circuit and is connected with the inverter circuit and the chopper circuit by a drive module; and the detection circuit includes a voltage detection circuit and a current detection circuit, both of which are connected to the controller. In addition, the test method includes: the controller applies a voltage signal of a test voltage to two ends of a tested electric reactor; the controller carries out sampling on a practical voltage and a practical current of a test piece by the detection circuit and a phase difference between a sampling voltage and a sampling current is calculated; voltage boosting is carried out on the tested piece and a phase different after voltage boosting is measured and is used as a standard phase difference; and the phase difference and the standard phase difference are compared to determine the performance of insulation of the tested electric reactor. Therefore, a phase angle relation of the voltage and current can be analyzed and the quality of the tested piece can be evaluated in real time.

Description

[0001] Technical field: [0002] The invention relates to the technical field of inter-turn insulation testing of iron-core reactors, in particular to an intermittent induction withstand voltage test device and test method for inter-turn insulation testing of iron-core reactors. [0003] Background technique: [0004] With the development of the power system, the application of the single coil is more and more extensive, and the single coil is mainly a reactor. Whether it is an iron core reactor or a dry-type air-core reactor, in all operating accidents, the insulation damage accidents between turns of its coils account for the majority. In order to ensure the reliability of the inter-turn insulation, in addition to the operation department taking certain protective measures to limit the overvoltage below a certain amplitude, it is more important that the reactor manufacturing department should improve the manufacturing quality of the inter-turn insulation and take reasonable m...

AI Technical Summary

Problems solved by technology

The traditional inter-turn insulation test method of iron-core reactor is mainly the lightning impulse method. The distribution of the initial impact voltage of this method is uneven, which affects the

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