Diagnosis device and diagnosis method for corrosion of earth screen of large-size transformer substation

Abstract

The invention provides a diagnosis device for corrosion of an earth screen of a large-size transformer substation. The diagnosis device comprises a distribution type collection box, a signal collection device, a movable calculation PC (personal computer) and a 3G (3rd Generation) wireless communication terminal, wherein the distribution type collection box is formed by a box body, a protection cover, binding posts and a measuring lead wire, wherein the protection cover detachably covers the box body; a plurality of binding posts are vertical in a mutually-insulating manner and pass through a bottom plate of the box body; the measuring lead wire is a two-core flexible lead core; one end of the measuring lead wire is electrically with the lower ends of the binding posts; and the other end of the measuring lead wire is welded with a lead-up wire of a grid node of the earth screen. The diagnosis device and the diagnosis method for the corrosion of the earth screen of the large-size transformer substation can be widely applied to corrosion fault detection of the earth screen of the transformer substation which is put into operation and are particularly suitable for the large-size transformer substation which has a larger occupied area and higher safety requirements. Furthermore, the diagnosis device and the diagnosis method for the corrosion of the earth screen of the large-size transformer substation can also be widely applied to other systems with the earth screens, such as steel, chemical engineering, a power plant and the like and have extremely great required amount and an extremely wide application prospect.

Description

technical field [0001] The invention relates to a ground grid corrosion diagnosis device, in particular to a portable ground grid corrosion diagnosis device which can detect the ground grid of a substation with a large floor area. The invention also relates to a diagnostic method using said diagnostic device. Background technique [0002] A large number of important electrical equipment are concentrated in the substation, which requires a good grounding device to meet the requirements of working grounding, protective grounding and lightning protection grounding. The practical grounding device for engineering is the grounding grid, which is mainly a grid composed of flat steel, round steel, or angle steel welded. The performance of substation grounding grid is directly related to the safety of personnel and equipment in the substation. With the development of my country's power system, the grounding short-circuit current is gradually increasing, and the requirements for th...

AI Technical Summary

Problems solved by technology

The main disadvantages of this patent are: due to the extremely complex electromagnetic environment in the substation switchyard, the detected magnetic induction intensity is greatly disturbed, the filter design is extremely complicated, and the accuracy is difficult to improve

The main disadvantage of this patent is that the ground network of large substations often occupies a large area, and extremely long measurement leads are required to pull back and forth frequently and replace measurement points during on-site diagnosis and measurement. One time wiring can only measure a group of ports, not only Larger, and there will be serious safety hazards in the long-term measurement operation in the switch yard of the live area of ​​the substation

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