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A Kind of High Power Power Supply Filter in Partial Discharge Test
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A high-power power supply and filter technology, which is used in testing circuits, testing dielectric strength and other directions to achieve good filtering effect, large current passing, and reducing influence.
Active Publication Date: 2022-03-01
STATE GRID BEIJING ELECTRIC POWER +2
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Power supply noise is often a problem that needs to be solved, can be solved, but can not be completely solved
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[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0021] refer to figure 2 , the high-power power supply filter in the partial discharge test described in the present invention includes a three-phase input terminal, a three-phase low-pass filter and a low-pass three-phase isolation transformer T; the low-pass three-phase isolation transformer T includes a first inductor L1 , seco...
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Abstract
The invention discloses a high-power power supply filter for partial discharge testing, which includes a three-phase input terminal, a three-phase low-pass filter and a low-pass three-phase isolation transformer; the low-pass three-phase isolation transformer includes a first inductor, a second Second inductor, third inductor, fourth inductor, fifth inductor, sixth inductor, first capacitor, second capacitor, third capacitor, fourth capacitor, fifth capacitor, sixth capacitor, seventh capacitor, eighth capacitor , the ninth capacitor, the tenth capacitor, the eleventh capacitor, the twelfth capacitor, the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor and the sixth resistor, the filter can effectively solve the power supply The impact of noise on partial discharge, while enabling large currents to pass.
Description
technical field [0001] The invention relates to a high-power power supply filter, in particular to a high-power power supply filter in partial discharge testing. Background technique [0002] Power transformer is one of the main core components in many power equipment. In order to ensure the production quality and on-site installation and commissioning quality of power transformers, various performance tests for power transformers have always been an important means of quality control. The partial discharge test of the transformer is one of the important test items. The partial discharge test not only requires the use of the partial discharge instrument and the variable frequency power supply without partial discharge, but also has strict requirements on the background noise. There are three main sources of background noise: power supply noise, ground network noise, and radiation noise. For the noise of the ground grid, not only the strict design of the ground grid is req...
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