Apparatus and method for adjusting commutation angle during operation test of converter valve

Abstract

The invention provides a converter valve operation test commutation angle adjusting device. The commutation angle adjusting device is composed of three electric reactors in parallel. One end of each electric reactor is connected with a wire outlet of a transformer. The other end of each electric reactor is connected with an alternating current wire inlet of a rectifier bridge. The electric reactor has at least two groups of taps. The electric reactors with different inductance values are selected through adjustment of the taps of the electric reactor to be in series connection in the commutation loop of the rectifier bridge, and therefore commutation angles needed by converter valve operation tests with different voltage grades are obtained. The invention also discloses a converter valve operation test commutation angle adjusting method. The commutation angle adjusting device carrying out a converter valve operation test by utilization of a synthesis test loop achieves grading adjustment of a commutation angle through adjustment of an inductance value of an electric reactor with a plurality of groups of taps. The adjustment method is simple and practical, and therefore the commutation angle meets engineering practice during the converter valve operation test.

Description

technical field [0001] The invention belongs to the technical field of converter valve testing, and in particular relates to a commutation angle adjustment device and method for a converter valve operation test. Background technique [0002] When the synthetic test circuit is used to test the high-voltage direct current transmission converter valve, the commutation angle of the load current needs to be assessed. The commutation angle of the converter valve with different voltage levels is different, generally between 20° and 30° ° between. In order to make the commutation angle more in line with engineering reality during the operation test of the converter valve, it is necessary to realize the adjustable commutation angle required for the operation test of the converter valve at different voltage levels. Using the leakage inductance of the converter transformer in the synthetic test circuit to simulate the commutation reactance, only a fixed commutation angle can be obtain...

AI Technical Summary

Problems solved by technology

Using the leakage inductance of the converter transformer in the synthetic test circuit to simulate the commutation reactance, only a fixed commutation angle can be obtained, and the commutation angle cannot be adjusted

Images