Liquid-immersed non-combustible power transformer

Abstract

The invention relates to a liquid-immersed non-combustible power transformer used in the fields of offshore wind power, pumped energy storage, and urban power grid, including a box body, a transformer body, an on-load tap changer, a radiator, and a condenser; The box body is also equipped with a solid insulating filler and a non-flammable insulating liquid that is liquid at normal temperature and has no flash point; the solid insulating filler is installed between the windings of the transformer body, and the transformer body and the Between the inner walls of the box, to enhance the short-circuit resistance of the transformer, guide the flow direction of the non-combustible insulating liquid and increase its flow speed; the transformer body, on-load tap changer, and solid insulating filler are all immersed in the non-flammable insulating fluid. The invention realizes oil-free and non-combustible transformers, can effectively improve the operation safety of offshore wind power, pumped storage power stations and urban power grids, eliminate fire hazards, and reduce accident operation and maintenance costs.

Description

technical field [0001] The invention relates to power transformers, in particular to the fields of wind power step-up station power transformers, wind power tower tube transformers, wind turbine cabin transformers, pumped storage power station step-up station power transformers, urban power grid power transformers and the like. Background technique [0002] In order to achieve the goal of "carbon peaking in 2030 and carbon neutrality in 2060", building a new power system with new energy as the main body has become an important task in the next stage of my country's energy and power generation; the proportion of clean energy such as offshore wind power, solar photovoltaics, and nuclear power It is expected to reach 80% and become the main body of my country's future energy supply. In the new power system architecture, the ratio of energy storage is required to be no less than 10%, and pumped storage, which is the main force of energy storage, will develop rapidly. It is fores...

AI Technical Summary

Problems solved by technology

Whether it is a wind power tower, a wind turbine cabin or a transformer room of a pumped storage booster station hundreds of meters underground, it is a closed space with poor air circulation. Vegetable oil, high ignition point oil transformers and dry-type transformers all have difficulties in heat dissipation. However, once the temperature rise of the transformer is too high, the insulation material inside the transformer will deteriorate, and the insulation breakdown will lead to a major short circuit fault inside the transformer. For vegetable oil and high ignition point oil transformers, it may cause combustion and explosion.

At the same time, for offshore wind power and pumped storage power stations, replacing the transformer is a very difficult project, and the replacement cost is also extremely high. It is necessary to maximize the service life of the transformer and reduce the replacement cycle

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