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Device for testing insulating property of high-voltage oiled paper

An oil-paper insulation and characteristic test technology, which is applied in the direction of test ship construction and dielectric strength test, can solve the lack of effective assessment methods for the insulation of the converter valve side, the difficulty in finding defects in the oil-paper main insulation system, and the low voltage of the AC partial discharge test and other issues to achieve the effect of saving resources, precise electrode spacing, and protecting the environment

Active Publication Date: 2011-01-26
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

Therefore, since the actual working condition of AC superimposed DC cannot be simulated during the converter rheology test, the AC partial discharge test voltage is low, and it is difficult to find possible defects in the oil-paper main insulation system, while the DC partial discharge test is not good for reactive insulation defects. Sensitive, lack of effective assessment methods for converter valve side insulation is the most important factor for the high insulation accident rate

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  • Device for testing insulating property of high-voltage oiled paper
  • Device for testing insulating property of high-voltage oiled paper
  • Device for testing insulating property of high-voltage oiled paper

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Embodiment

[0069] The specific application of each typical electrode in the invention is given below by taking the study of the partial discharge characteristics of oil-paper insulation under the action of AC-DC composite voltage as an example.

[0070] 1. Research on oil-paper partial discharge under the spherical plate electrode

[0071] Figure 6 The partial discharge connection diagram of the oil-paper insulation between the electrodes of the ball plate under AC and DC voltage is given, among which, 11 is the electrode structure of the ball plate, in which the spherical electrode is made of stainless steel with a diameter of 20 mm, and the ground electrode is a plate made of stainless steel with a diameter of 280 mm and a thickness of 10 mm type electrode.

[0072] Such as Figure 6 As shown, each part of the test device of the present invention is placed in the oil barrel 10, and some peripheral components need to be connected outside the test device of the present invention durin...

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Abstract

The invention relates to the technical field of high voltage and insulation, in particular to a device for researching and testing an insulating property of high-voltage oiled paper. Aiming at the positions of frequent faults during the operation of a converter transformer, the device simulates a ball-board, a needle-board, a board-board, faces and suspension discharge electrode models; and the typical high-voltage oil / oiled paper insulating experiments can be realized under direct current (DC) voltage, alternating current (AC) voltage and AC-DC voltage so as to acquire partial discharge characteristics and breakdown characteristics of the major insulation of the converter transformer.

Description

technical field [0001] The invention relates to the technical field of high voltage and insulation, in particular to a research and test device for high voltage oil-paper insulation characteristics. Background technique [0002] With the increase of DC lines in my country and the construction of ±800kV DC transmission projects, research projects related to DC have attracted more and more attention. Existing engineering experience and statistical results show that in HVDC transmission systems, the insulation problems of many key primary equipment such as converter transformers and bushings are the most important factors restricting design and causing field accidents. The statistical results of the WG B4.04 working group of the CIGRE HVDC subcommittee show that the equipment accident rate of the HVDC transmission system is more than twice that of the AC system. [0003] In the first batch of converter transformer main insulation tests in Geshang Project in my country, insulat...

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Application Information

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IPC IPC(8): G01R31/12G01R31/16
Inventor 李博程涣超李金忠李光范孙倩邓俊宇徐会雨
Owner CHINA ELECTRIC POWER RES INST
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