A box-type high-voltage power capacitor

Abstract

The invention relates to a box-type high-voltage power capacitor, comprising a shell, a core and a compensating heat dissipation device; the shell is a hollow structure made of a stainless steel plate, and the gap inside is filled with an insulating impregnating agent; The core is mounted in the shell and immersed in the insulation impregnating agent; A sleeve connected with the core is arranged on the top of the shell; The compensating heat dissipation device is mounted on the outer side wall of the shell, and expands or contracts according to the thermal expansion and cold contraction of theinsulating impregnating agent to compensate for volume change, and also causes the circulating flow of the insulating impregnating agent to accelerate the dissipation of heat inside the shell. The invention has the advantages that the stainless steel plate is directly used on the capacitor instead of a common steel plate, and the surface treatment cost can be saved; the compensation heat dissipation device replaces an expander with more solder joints, reduces the possibility of oil leakage, improves the reliability of the capacitor, reduces the operation temperature rise of the capacitor andprolongs the service life of the capacitor.

Description

technical field [0001] The invention relates to the technical field of high-voltage power capacitors, in particular to a box-type high-voltage power capacitor. Background technique [0002] In the power system, if a large-capacity capacitor compensation device is used in a substation, it will overcompensate, and if no capacitor compensation device is used, it will undercompensate too much. It is very important to implement accurate compensation. The power consumption in remote rural areas is sparse and scattered, and maintenance and management are inconvenient. A small and medium-sized Capacitor compensation devices with high capacity, compact structure, high reliability, and low cost have a wide market demand for power capacitor compensation in rural power grids. Substances will expand when heated and contract when cooled. In order to improve the electrical performance of the capacitor, the interior of the capacitor is evacuated into a high vacuum, and then filled with impr...

AI Technical Summary

Problems solved by technology

Substances will expand when heated and contract when cooled. In order to improve the electrical performance of the capacitor, the interior of the capacitor is evacuated into a high vacuum, and then filled with impregnating agent. The volume of the impregnating agent will increase and decrease with the increase of temperature. This type of capacitor is welded by thin steel The expander compensates the volume of the impregnating agent inside the capacitor. When the temperature rises, the volume of the impregnating agent increases, and the volume of the expander becomes larger. When the temperature drops, the volume of the impregnating agent decreases, and the internal volume of the expander becomes smaller. The volume of the agent changes with the temperature, but the expander has too many solder joints, low reliability, high cost, and the market is unacceptable. The ordinary carbon steel plate material used needs to be pickled, alkali neutralized, then phosphated, and finally cleaned, which is harmful to the environment. Cause a lot of pollution, so it is necessary to solve these problems

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