Hot-line test device and method for leakage current of transmission line insulator

Abstract

The invention provides a hot-line test device for leakage current of a transmission line insulator. The hot-line test device comprises a leakage current acquisition unit and a portable leakage currentmeasurement unit. The leakage current acquisition unit includes a current acquisition element, an insulated wire, and an interface unit. The current acquisition element is arranged on the insulator or a hardware fitting connecting an insulator string and an iron tower. The current acquisition element is used to collect leakage current of the insulator. The insulated wire is wrapped, attached andfixed on the iron tower. One end of the insulated wire is electrically connected to the current acquisition element. The portable leakage current measurement unit is suitable for being secured to theiron tower of a transmission line and connecting a ground terminal with the iron tower during detection. An input terminal of the portable leakage current measurement unit is electrically connected tothe other end of the insulated wire through the interface unit. The invention also provides a hot-line test method for leakage current of the transmission line insulator. The test device of the invention can measure all insulator strings on the iron tower with only a portable leakage current measurement unit, and has high efficiency and low cost.

Description

technical field [0001] The invention relates to the technical field of polluted electrification detection of overhead transmission lines in electric power systems, in particular to a device and method for electrification detection of leakage current of insulators of transmission lines. Background technique [0002] Transmission line insulators work outdoors for a long time, and the electrical performance will seriously decline after the surface is contaminated. Pollution flashover accidents may occur in bad weather. Once pollution flashover occurs, it may cause large-scale power outages and seriously affect the stable operation of large power grids. Seriously affect people's production and life simultaneously. In order to prevent the occurrence of pollution flashover accidents, it is necessary to know the pollution status of the outdoor insulator surface, and judge whether to clean the insulators. Insulator leakage current is a comprehensive reflection of factors such as vo...

AI Technical Summary

Problems solved by technology

[0004] In view of the fact that the existing insulator on-line monitoring device works outdoors for a long time, the leakage current measured under the condition of dryness or low pollution is relatively weak, the error is large, and it is difficult to reflect the real pollution information on the surface of the insulator, so the measurement conditions are harsh. Each string of insulators requires an on-line monitoring device to obtain the leakage current information of the insulator string, and the on-line monitoring device also needs an energy supply device, so there is a technical problem of high cost. The invention provides a live detection device for the leakage current of an insulator on a transmission line

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