Power device for controlling power semiconductor device to form series valve group

Abstract

The invention discloses a power device for controlling a power semiconductor device to form a series valve group. A power supply in a sine curve voltage source form is connected to the output end of a coupling transformer; a series loop of a primary winding of a power transformer is formed as follows: a wire from high-voltage insulation penetrates through a magnet ring of the power transformer; a reactor is connected to the output end of the power supply through the series loop of the primary winding of the power transformer; a compensating capacitor is directly connected to a secondary winding of the coupling transformer; a wire core from high-voltage insulation is connected with a central point of a series valve group loop formed by the power semiconductor device; insulation between the primary winding and the secondary winding of the coupling transformer of the power supply is the required maximum potential of the valve group relative to the ground under the condition; the basic insulation load on a valve group component is borne by the coupling transformer; the partial discharge level generated by voltage between the wire from the high-voltage insulation and the power transformer is obviously low.

Description

technical field [0001] The present invention is based on power electronics technology in the power electronics industry and can be used as a power supply device for controlling power semiconductor devices to form a series valve group, for example, as a detection thyristor to form a TSC valve group, TCSC valve group or other thyristor Control the power supply of the series valve group in the all-round experimental station of the valve group. Background technique [0002] In the background technology, the patent US 7,009,853 B2, Int. Cl. H02M 3 / 335 has a power supply device with a rectification function to control a series power switch high-voltage valve group, including: an AC power supply; a power transformer with a rectification function to control each component; The primary side winding of the power transformer with rectification function is a series circuit, which appears in the form of a high-voltage wire passing through the magnetic ring of the power transformer with r...

AI Technical Summary

Problems solved by technology

[0003] This patent has the following deficiencies: using ordinary high-voltage cables, the upper limit of the working voltage of the equipment is 10-20kV

For example, when the Almighty Experiment Station conducts experiments on TCR and TSC valve groups, the upper limit of the working voltage will reach 40 kV. The above-mentioned devices cannot be used when the valve group uses the drive board power supply, especially during the experiment. cut

Although the duration of the experiment was not long, there was a possibility of breakdown of the cable insulation due to redundant partial discharges

In this way, the safe work of the operator cannot be guaranteed, and the operator may get an electric shock

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