Thyristor service life aging screening device for high-voltage direct-current power transmission valve

Abstract

The invention relates to a thyristor service life aging screening device for a high-voltage direct-current power transmission valve, which comprises a cabinet, and four unit modules are arranged in the cabinet and are respectively a high-voltage control and display module, a clamp constant-temperature heat dissipation module, a computer automatic recording module and a safety protection module; early aging screening can be carried out on the thyristors for high-voltage direct-current transmission, and aging life research can be carried out on the thyristors running for a long time. The device has the long-time reliable operation capability, has the automatic constant-temperature heat dissipation function, can adjust the applied voltage, can select three test waveforms of the direct-current voltage, the half-sine wave and the full-sine wave, can automatically record the test result, has seven protection functions, and can work for a long time under the unattended condition.

Description

technical field [0001] The invention relates to the field of semiconductor test equipment, in particular to a life aging screening device for thyristors used in high voltage direct current transmission valves. Background technique [0002] In the field of high-voltage direct current transmission, in order to meet the high-voltage and high-current requirements of direct current transmission, a large number of thyristors are connected in series and parallel on the rectification side and inverter side of the high-voltage direct current transmission line. Therefore, the reliability of the thyristor device is related to the operation reliability of the valve group. key components. Thyristors are often in a high-temperature state during normal operation, and they always run periodically in the on-state and off-state and generate a certain amount of power consumption. When the thyristor performance degrades and reacts to the forward and reverse blocking state, its leakage current ...

AI Technical Summary

Problems solved by technology

When the thyristor performance degrades and reacts to the forward and reverse blocking state, its leakage current will increase, or the voltage it can withstand under the same leakage current condition will decrease. When a single thyristor degrades to a certain extent, its blocking ability will be reduced. As the number of degraded thyristors increases to a certain number, it may threaten the operation safety of the entire high-pressure valve

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