Double-split epoxy resin insulated dry-type step-up transformer for wind power and photovoltaic power generation

Abstract

The invention discloses a double-split epoxy resin insulation dry type boosting transformer for wind power and photovoltaic power generation, and belongs to the field of transformers. Each of three phases of windings comprises two groups of high-voltage coils and two groups of low-voltage coils, wherein the two groups of high-voltage coils are arranged vertically on the same axis, the winding direction of each upper high-voltage coil is opposite to the winding direction of each lower high-voltage coil, the adjacent ends of the two groups of high-voltage coils in one winding are connected in an equipotential way, the three groups of high-voltage coils at the upper part are connected in a Y shape, the three groups of high-voltage coils at the lower part are also connected in a Y shape, the two groups of low-voltage coils in each winding are also arranged vertically on the same axis, the low-voltage coils are coaxially arranged in the inner sides of the high-voltage coils, the three groups of low-voltage coils at the upper part are connected in a triangle way, and the three groups of low-voltage coils at the lower part are also connected in a triangle way. The transformer has the advantages that the short-circuiting current is small, the two paths of input power sources can be simultaneously and independently connected, and the running of a power grid is safe. The transformer is applied to the wind power and photovoltaic power generation systems.

Description

Technical field [0001] The invention relates to a step-up transformer, in particular to a step-up and grid-connected dry transformer for wind power farms and solar photovoltaic farms. Background technique [0002] With the declining global energy and increasing human awareness of environmental protection, power generation with wind and solar energy as the core energy has developed by leaps and bounds in recent years, and will become the main energy supply in the world. Wind and solar photovoltaic power generation systems can be divided into independent systems and grid systems: independent systems are currently mainly used in remote areas without or lack of electricity; grid systems are directly connected to the public grid for operation. The disadvantage is that the existing transformer cannot limit the short-circuit current when a short-circuit fault occurs, which leads to a larger fault. Summary of the invention [0003] The purpose of the present invention is to provide a dou...

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Problems solved by technology

Its disadvantage is that the existing transformer cannot limit the short-circuit current when a short-circuit fault occurs, resulting in a larger fault

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