110KV low-power-consumption environmentally-friendly power transformer

Abstract

The invention relates to a 110KV low-power-consumption environmentally-friendly power transformer and aims to solve the problems of insulating medium leakage and high energy consumption, which are caused by high-voltage primary side detection, of the traditional power transformer. The ends of three-phase windings on the Y-connection side of the transformer are connected respectively or are provided with the wiring terminals after being connected respectively, wherein for an oil-immersed type transformer, the ends of the three-phase windings are connected outside the body of the transformer; and for a dry type transformer, the ends of the three-phase windings are connected in the body of the transformer or connected outside the body or the transformer respectively. Current monitoring and controlling devices are arranged at the positions of the wiring terminals respectively. The Y-connection side of the transformer is provided with independent neutral point fixed wiring terminals which are not connected with the ends of the three-phase or the wiring terminals of the ends. As the way for the current metering, measurement and control of the transformer is changed from high-voltage monitoring into low-voltage monitoring, so a low-voltage current monitor can be used to replace a high-voltage current monitor and the cost is reduced greatly; the low-voltage monitor is easy to mount, use and maintain, more accurate in measurement, more compact in structure, lower in energy consumption, safer and more reliable and free from problems of oil insulation, sulfur hexafluoride leakage and environmental pollution; and the economic, social and environmental benefits are more desirable and the popularization value is high.

Description

technical field [0001] The invention relates to a transformer, in particular to a 110KV series low energy consumption environment-friendly power transformer. Background technique [0002] The Y-connection method of the transformer is widely used in the manufacture of three-phase transformers due to its low requirements on insulation level and low manufacturing cost. For example, three-phase double-winding transformers include: Y yn, Y d, YN d, Y zn11, D yn11; three-phase three-winding transformers include: YN yno d11, YN yno yno, YN ao d11, YN ao yno; three-phase self-coupling The transformers are: YNao yno d11, YN ao yno d. For these transformers with Y connection, some primary and secondary sides have Y connection on one side, and some primary and secondary sides have Y connection at the same time. [0003] In the design and manufacture of the current 110KV series transformers with Y-connection method, considering the compact structure and manufacturing cost of the trans...

AI Technical Summary

Problems solved by technology

According to the traditional linear theory, when people design current monitoring instruments, they have to fortify layer by layer, resulting in the current 10kV voltage level current monitoring instruments (such as current transformers) being bulky, high energy consumption, expensive, difficult to install, use, and maintain. Prone to safety accidents, resulting in leakage of insulating oil or SF6 gas, polluting the environment

It can be seen that there are serious defects in the neutral point connection method of the current 110KV series Y-connected transformers.

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