Dry type transformer for photovoltaic power generation

Abstract

The invention discloses a dry type transformer for photovoltaic power generation. The dry type transformer for photovoltaic power generation comprises a low-voltage winding and a high-voltage winding which are arranged concentrically; the low-voltage winding is in a double-disrupt arrangement structure; an iron core which is arranged inside the dry type transformer for photovoltaic power generation is an amorphous alloy iron core. The amorphous alloy strip thickness is small, so that the amorphous alloy strip eddy current loss is small; the transformer iron core which is manufactured through amorphous alloy materials instead of silicon steel sheets; the specific loss of the amorphous alloy materials is only 20 to 30 % of the silicon steel sheet iron core; accordingly the iron core of the double-disrupt transformer for the photovoltaic power generation is manufactured through the amorphous alloy strips which are good in magnetic conductive performance, the double-disrupt transformer for the photovoltaic power generation obtains low no-load current, the no-load loss is reduced by 70 to 80 % compared with a common transformer with a silicon steel sheet iron core, the power transmission efficiency is greatly improved, the electric energy loss is reduced, and the integral efficiency and benefits of a photovoltaic power generation system are improved.

Description

technical field [0001] The invention belongs to the field of transformers, in particular to a dry-type transformer for photovoltaic power generation. Background technique [0002] Photovoltaic power generation has two working modes: off-grid (independent power station) and grid-connected (mains grid-connected power station). The grid-connected system feeds the direct current generated by solar panels directly into the grid through a combiner box, inverter, and step-up transformer. , so that the dispersed electric energy is finally connected to the grid for subsequent transmission, distribution and use. At present, in order to save investment and installation space in photovoltaic power stations, two inverters share a double-split transformer (compared with one inverter and one step-up transformer, this method will save nearly 50% of transformer investment) , the installation space will be saved by nearly half), and the AC low voltage generated by the two inverters is input ...

AI Technical Summary

Problems solved by technology

[0004] At present, the iron cores of the double-split transformers used in photovoltaic power stations are all traditional silicon steel sheet iron cores. The disadvantages are that the transformer has high no-load loss and low efficiency, so that the green energy converted by a large number of solar panels is consumed in vain and cannot produce benefits. Conducive to the improvement of the overall efficiency and benefit of the photovoltaic power generation system

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