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Thin-film capacitor applied to flexible direct-current power transmission system and production process thereof

A technology for film capacitors and power transmission systems, which is applied in the direction of film/thick film capacitors, laminated capacitors, fixed capacitor electrodes, etc., can solve the problem that the performance of high-voltage film capacitors cannot meet the application requirements of flexible direct transmission systems, and achieve the purpose of adding safety isolation films , reduce its own inductance, reduce the effect of uneven shunt

Pending Publication Date: 2020-12-25
WUXI CHENRUI NEW ENERGY TECH
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AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the performance of the existing domestic ultra-large-capacity, low-inductance, and high-voltage film capacitors cannot meet the application requirements of flexible direct transmission systems, the present invention provides a film capacitor and its production process for flexible direct transmission systems, which can effectively improve film capacitance. Excellent performance to meet the application requirements of flexible direct transmission system

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  • Thin-film capacitor applied to flexible direct-current power transmission system and production process thereof
  • Thin-film capacitor applied to flexible direct-current power transmission system and production process thereof
  • Thin-film capacitor applied to flexible direct-current power transmission system and production process thereof

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Embodiment Construction

[0024] A film capacitor used in flexible direct transmission systems, the film thickness of the film capacitor is 2-10um, see figure 1 As shown, the sizes of the cores wound by 2μm, 2.5μm, and 3μm films are given from left to right. The thinner the film thickness, the smaller the core size. The capacitance is inversely proportional to the square of the film thickness. Miniaturization is the most The effective method is to reduce the thickness of the film, but the pressure resistance of the film is proportional to the thickness. How to ensure its pressure resistance has become a technical difficulty. Therefore, the film of the film capacitor is made of a mixture of highly crystalline resins. See figure 2 As shown, the thickness of the film is reduced under the premise of ensuring the pressure resistance, and the resin is polypropylene.

[0025] Among the various failure modes of metallized film capacitors, breakdown is the most serious mode. Not only the attenuation of capacit...

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Abstract

The invention relates to the technical field of thin-film capacitors, in particular to a thin-film capacitor applied to a flexible direct-current power transmission system and a production process ofthe thin-film capacitor, which can effectively improve the performance of the thin-film capacitor and meet the application requirements of the flexible direct-current power transmission system; the film thickness of the thin-film capacitor is 2-10 microns, and the film of the thin-film capacitor is formed by mixing high-crystallization resin. A metal electrode layer with patterns is evaporated onthe surface of a thin film of the thin film capacitor to form a safety isolation film, cores of the thin film capacitor are independently led out of each core group and connected to a busbar, each core group is composed of single cores connected in parallel, and the production process comprises the steps of thin film winding, heat setting and finished product inspection.

Description

technical field [0001] The invention relates to the technical field of film capacitors, in particular to a film capacitor applied to a flexible direct transmission system and a production process thereof. Background technique [0002] With the increasingly serious problems of energy shortage and environmental pollution, optimizing the energy structure and vigorously developing and utilizing renewable and clean energy are one of the national strategic layouts. However, with the continuous expansion of the utilization scale of renewable energy such as wind energy and solar energy, its inherent characteristics of dispersion, small size, and far away from the load center make it uneconomical to adopt AC transmission technology or traditional DC transmission technology for networking. However, for passive loads such as offshore drilling platforms and isolated islands, expensive local power generation devices are currently used, which is not economical but also pollutes the enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/18H01G4/38H01G4/005H01G4/33
CPCH01G4/18H01G4/38H01G4/005H01G4/33
Inventor 俞广铨陈栋
Owner WUXI CHENRUI NEW ENERGY TECH
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