Large-power high-frequency transformer cooling system adopting forced internal guided oil circulation cooling

Abstract

The invention provides a large-power high-frequency transformer cooling system adopting forced internal guided oil circulation cooling, through which the problem of difficult cooling of an iron core and a primary coil of a large-power high-frequency transformer can be solved. The system comprises a transformer casing, a compound coil, an oil pump and a cooling unit, wherein the compound coil and the iron core are arranged in the transformer casing; the compound coil comprises a flow guiding copper pipe and copper wires, and the copper wires are wound on the flow guiding copper pipe and connected with a terminal on the outer side of the transformer casing; the bottom of the transformer casing is connected with an oil guiding pipe; the oil guiding pipe is connected with the oil pump; the oil pump is connected with the cooling unit through the oil guiding pipe; and the cooling unit is connected with the flow guiding copper pipe through the oil guiding pipe. The system provided by the invention has the advantages that cooling oil flows in the coil through the flow guiding pipe in the coil, and the cooling unit is added, so that the cooling effect for the large transformer is achieved; and a local high temperature inside the transformer can be eliminated, the size can be reduced, the cooling effect is good, and a longer service life and energy conservation can be achieved.

Description

technical field [0001] The invention relates to the technical field of transformer refrigeration, in particular to a high-power high-frequency transformer refrigeration system for forced internal guide oil circulation cooling. Background technique [0002] When the transformer is running, the heat generated by the loss of the winding and core must be dissipated in time to avoid insulation damage caused by overheating. Since the loss of the transformer is proportional to its volume, as the capacity of the transformer increases, its volume and loss will increase in the form of the cube of the core size, while the external area will only increase in the quadratic power of the size. For small-capacity transformers, the ratio of the outer surface area to the volume of the transformer is relatively large, and a self-cooling method can be used to dissipate heat through radiation and natural convection. The large-capacity transformer core and winding should be immersed in oil, usua...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problem that high-power transformers need more cooling oil and the cooling effect is not obvious, the present invention proposes a high-power high-frequency transformer refrigeration system with forced internal guide oil circulation cooling, using the primary coil as the oil conduit, and utilizing the oil pump pressure to greatly The circulation speed of the cooling oil inside the transformer is enhanced, so that the temperature of each part of the coil and the iron core is uniform and stable, and the local temperature will not be too high due to poor cooling oil conduction, thus playing a good cooling effect

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