Oil-immersed water-cooled high-power electric and electronic capacitor

The invention relates to an oil-immersed water-cooled high-power electric and electronic capacitor, which consists of a shell, a capacitor core set and a cover plate. A cooling device is arranged at a gap between the capacitor core set and the shell; a cover plate assembly is provided with a cooling water inlet interface and a cooling water outlet interface which are connected with an external cooling water pipe; and two ports of the external cooling device are respectively communicated with the water inlet interface and the water outlet interface on the cover plate assembly. When the capacitor works, heat produced by the capacitor is dissipated in the form of heat radiation and heat produced inside the capacitor is brought away when external cooling water flows through the capacitor through the interface on the cover plate assembly, so internal temperature rise of the capacitor can be reduced and a temperature upper limit in the working environment of the capacitor is provided. The invention has the advantages of enhancing overcurrent capability of the capacitor, prolonging the service life of the capacitor, reducing the volume of the capacitor and lowering the manufacturing costof the capacitor.