Electrode system and method applicable to multi-size insulating cardboard breakdown strength tests

Abstract

The invention relates to an electrode system and method applicable to multi-size insulating cardboard breakdown strength tests. The electrode system comprises a bottom plate, a ground lead terminal, a ground electrode rod, a fixed screw, a high voltage insulator, a lifting handle, a high voltage electrode, a high voltage electrode rod, an electrode mounting plate, a high voltage terminal, a ground electrode and a movable screw, wherein both of the ground electrode rod and the high voltage insulator are fixed to the bottom plate, and both of the fixed screw and the movable screw are installed on the electrode mounting plate; and the high voltage terminal is arranged at the upper part of the high voltage electrode rod, and the ground lead terminal is arranged at the lower part of the ground electrode rod. By adoption of the electrode system and method provided by the invention, researches on the paper oil insulation breakdown properties can be better executed, multi-size oil immersed insulating cardboards with different shapes and different thicknesses are fixed in the electrode system, the breakdown strength tests are executed by changing the oil gap width and applying different voltage forms, and reference is provided for the insulation design of converter transformers and the tests of high voltage DC transmission equipment.

Description

technical field [0001] The invention relates to the technical field of electric equipment insulation detection, in particular to an electrode system and method suitable for the breakdown strength test of multi-size insulating cardboard. Background technique [0002] The converter transformer is the core component of the UHV DC transmission system. It undertakes the important task of power conversion in the DC transmission system. The safe and stable operation of the entire power system is determined by its reliability. The theoretical design of the converter transformer is extremely complex, and the manufacturing process and maintenance technical requirements are very high. In the early 1860s, well-known foreign companies ABB and SIEMENS have fully mastered the design and manufacture of converter transformers after more than 40 years of development, but my country has not yet carried out much research in the field of converter transformers. [0003] In the 1980s, my country...

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Problems solved by technology

[0003] In the 1980s, my country vigorously built UHVDC power transmission projects, but the converter transformers produced by domestic factories were basically jointly produced with foreign companies and subcontracted to digest and absorb the core technologies of foreign companies, so they did not surpass foreign advanced technologies. The foundation of high-voltage direct current transmission is far from meeting the future development requirements of high-voltage direct current transmission.

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