Instrument transformer with heat dissipation assembly

Abstract

The invention provides a transformer with a heat dissipation component, comprising: a metal shell for accommodating the transformer and integrally formed; a heat dissipation material layer, which is closely attached to the inner wall of the metal shell; placed in the center of the metal shell; the primary winding and the secondary winding are wound on the iron core corresponding to the inner layer and the outer layer respectively, and are electrically isolated from each other by the insulating material layer; a plurality of heat dissipation material rods, all The plurality of heat-dissipating material rods pass through the insulating material layer, and both ends thereof are physically and thermally connected to the heat-dissipating material layer; the molding material is filled in the metal shell and completely covers the iron core, once Windings, secondary windings and rods of heat sink material.

Description

technical field [0001] The invention relates to a transformer in the electric power field, in particular to a transformer with a heat dissipation component. Background technique [0002] In the power system, the signals required for voltage metering, measurement and relay protection are mostly provided by electromagnetic transformers. The problems of this transformer are short circuit risk, heavy weight, large volume, and secondary load reflection. Sensitive, prone to ferromagnetic resonance, serious safety hazards will occur. At present, with the continuous development of intelligent technology, the power system has developed towards networking, automation and digitalization, and the input signals required by secondary equipment have been significantly reduced, and large-capacity secondary signals are not required. Therefore, this traditional It is difficult for electromagnetic voltage transformers to meet new technical requirements. There is an urgent need for an electro...

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Problems solved by technology

[0002] In the power system, the signals required for voltage metering, measurement and relay protection are mostly provided by electromagnetic transformers. The problems of this transformer are short circuit risk, heavy weight, large volume, and secondary load reflection. Sensitive, prone to ferromagnetic resonance, serious safety hazards

[0003] With the development of digital substations and the needs of smart grid construction, power systems have higher and higher requirements for intelligence and automation of measurement, protection, control and data transmission, and electronic voltage transformers that have emerged as a result have become popular. Research object, in the current medium-voltage system, most electronic voltage transformers adopt the principle of resistance voltage division and resistance-capacity voltage division. Electronic voltage transformers designed with this principle have high heat production efficiency and low load capacity (in mega Europe), low precision, especially after running for a period of time, the error data deviates seriously, exceeding the accuracy level data at the time of delivery, and failing to meet the actual requirements of users

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