Direct current voltage divider and capacitance and dielectric loss detection method thereof

Abstract

The present invention provides a direct current voltage divider and a capacitance and dielectric loss detection method thereof. The direct current voltage divider comprises an insulating bush, and a high voltage arm and a low voltage arm which are installed in the insulating bush. The top of the insulating bush is coaxially provided with a metal conductive barrel, the bottom end of the insulating bush is coaxially provided with a metal substrate, the high voltage end of the high voltage arm is electrically connected with the metal conductive barrel, and the metal substrate is grounded; the metal conductive barrel is electrically connected with a high-voltage polar line through a switch, and the lead connected with the low-voltage end of the high-voltage arm and the lead connected with the high-voltage end of the low-voltage arm are connected with each other through a short circuit jumper wire at the exterior of the insulating bush. The direct current voltage divider is good in heat radiation performance and good in reliability , can perform pressurization test of the high-voltage arm and the low-voltage arm, detect the capacitance and dielectric loss of the high-voltage arm and the low-voltage arm of the direct current voltage divider, and is simple in operation and high in safety.

Description

technical field [0001] The invention relates to a DC voltage divider and a detection method, in particular to a DC voltage divider in which a high-voltage arm and a low-voltage arm are connected in series through an external short-circuit jumper, and a detection method for capacitance and dielectric loss of the DC voltage divider . Background technique [0002] In recent years, more and more DC projects have been constructed, especially the rapid development of UHV DC, which has enabled DC transmission technology to be widely used. The preventive test and inspection of the converter station is an important link in the operation and maintenance of equipment. Its purpose is to check whether the electrical equipment is in good condition during long-term operation, so as to find defects and deal with them in time. It is an important measure to ensure the safe operation of electrical equipment. Most of these preventive tests need to remove the lead wires. Especially for DC elect...

AI Technical Summary

Problems solved by technology

Most of these preventive tests need to remove the lead wires. Especially for DC electrical equipment, due to the high voltage level, it takes more manpower and material resources to remove and connect the lead wires during the test. , lead wires may cause equipment and personnel safety problems

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