Test unit for monitoring oil-paper insulation state

Abstract

The invention provides a test unit for monitoring an oil-paper insulation state, and is suitable for the fields of transformers and oil-paper insulation monitoring. The test unit comprises a computer, an electrometer and a control bus communication cable; a high voltage DC power source and an ammeter are arranged in the electrometer; one end of the control bus communication cable is connected with a control bus interface of the electrometer, while the other end is connected with an interface of a control bus control card in the computer; a low voltage end interface of the high voltage DC power source and a grounding interface of the electrometer are grounded together; a high voltage end of the high voltage DC power source is connected with a first electrode of a product to be tested through a high voltage wire; a measuring end of the ammeter is connected with a second electrode of the product to be tested; and the test unit is provided with a control panel capable of displaying and storing data and setting parameters. The test unit is simple to operate, has the current detecting rate at least 1sps, can generate rich measurement information, is convenient to analyze and process test results, and has lower cost than foreign test instruments.

Description

technical field [0001] The invention relates to the field of state monitoring of oil-paper insulation, and relates to an oil-paper insulation equipment and a test device for monitoring the state of material insulation. Background technique [0002] Oil-paper insulation materials and equipment, especially the most widely used large-scale oil-immersed power transformer, have a direct relationship with the safety and stability of the power system. According to statistics, the operation accidents of transformers are mainly caused by the failure of their insulation systems, so their life Much depends on the aging state of the oil-paper insulation system. During the operation of the transformer, the oil-paper insulation is subjected to various external stresses such as heat, electricity, machinery, and chemistry for a long time, which leads to a gradual decline in its own insulation and mechanical properties and may cause transformer failure. Therefore, accurately diagnosing the ...

AI Technical Summary

Problems solved by technology

[0006] For the traditional diagnosis of the insulation state of oil-paper insulation equipment and materials, it is necessary to collect solid insulation samples, which is complicated to operate and destructive to the tested product. However, the foreign testing equipment using the same method is expensive and the amount of information obtained is less technical. The present invention proposes following technical scheme:

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