Modular solid-state microsecond pulse generator for simulating insulation electrical stress of saturation reactor

Abstract

The invention discloses a modular solid-state microsecond pulse generator for simulating insulation electrical stress of a saturation reactor. The modular solid-state microsecond pulse generator mainly comprises a control circuit, a bipolar Marx circuit system and a pulse transformer system T, wherein the control circuit is used for controlling all IGBT switch tubes in the bipolar Marx circuit system to be switched off, the bipolar Marx circuit system is used for transferring an output voltage to the pulse transformer system T, and the pulse transformer system T is used for improving amplitudeof the output voltage. Under the condition that a front-stage Marx generator conforms to insulation requirement, the multiplication of the output voltage can be greatly achieved, and meanwhile, the effect of improving waveform can be achieved; and an actual-measurement result shows that the generator can be used for researching an insulation failure mechanism of epoxy resin insulation of an ultrahigh-voltage DC converter valve saturation reactor under an effect of a power frequency pulse voltage.

Description

technical field [0001] The invention relates to the field of modular solid-state microsecond pulse generators, in particular to a modular solid-state microsecond pulse generator for simulating the insulation electrical stress of a saturated reactor. Background technique [0002] The converter valve is the core equipment of UHV DC transmission, and maintaining its long-term stable and reliable normal operation is the key to the entire DC transmission system. The saturable reactor is an important device for protecting the thyristor, and the failure of the saturable reactor will directly threaten the safe operation of the converter valve. [0003] At present, the insulation material of the 1100kV / 5000A UHV DC converter valve saturable reactor developed by the Global Energy Internet Research Institute is epoxy resin. Domestic research on the insulation design of the converter valve saturable reactor is very insufficient. The insulation of the saturable reactor The design refers...

AI Technical Summary

Problems solved by technology

[0006] However, the unipolar Marx generator not only cannot meet the needs of outputting positive and negative polarity pulses and realize the adjustment of the rising edge of the pulse

Moreover, only relying on the Marx generator to boost the voltage will pose a huge challenge to the insulation level of the solid-state switch, and the boosting capacity is limited.

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