Alternating current filter capacitor used in plateau

Abstract

The invention discloses an alternating current filter capacitor used in a plateau. The alternating current filter capacitor used in the plateau comprises a capacitor core set, an insulating layer, filler, a metal shell and a shell cover, wherein the capacitor core set is arranged in the metal shell, the insulating layer is arranged between the capacitor core set and the metal shell, the filler is arranged in a gap in the metal shell, a leading-out terminal is arranged on the shell cover and is electrically connected with the capacitor core set, the capacitor core set is formed by twining of a metallized thicken film with temperature tolerance larger than or equal to 85 DEG C, and no gas is contained inside the alternating current filter capacitor used in the plateau or the interior air pressure of the alternating current filter capacitor used in the plateau is within a half atmosphere pressure. According to the alternating current filter capacitor used in the plateau, no gas is contained inside or the interior air pressure is within a half atmosphere pressure, and therefore bulging of the shell is avoided when the alternating current filter capacitor is used in the lower-pressure environment of a plateau the altitude of which is 3000-5000m.

Description

technical field [0001] The invention relates to a plateau AC filter capacitor, which belongs to the technical field of capacitors. Background technique [0002] The AC filter capacitor can absorb the harmonics generated by the harmonic source in situ, prevent a large number of harmonics from entering the system, thereby eliminating harmonic pollution and improving the power supply quality of the power grid. [0003] Conventional AC filter capacitors are used at an altitude of no more than 2000m. The plateau area over 2000m has low air pressure, low temperature, large diurnal temperature variation, low absolute humidity, and relatively strong solar radiation intensity. The low air density at low air pressure reduces the dielectric strength of the air, thereby reducing the external dielectric strength of the capacitor. At the same time, the low air density reduces the cooling effect of the air, which increases the temperature rise of the capacitor. At the same time, the pla...

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Problems solved by technology

The low air density at low air pressure reduces the dielectric strength of the air, thereby reducing the external dielectric strength of the capacitor

At the same time, the low air density reduces the cooling effect of the air, which increases the temperature rise of the capacitor

At the same time, the plateau working conditions are harsh, and the capacitor should have strong anti-corrosion and anti-sandstorm capabilities; it is not suitable to use conventional AC filter capacitors directly in plateau areas.

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