Quadripartion photovoltaic power generation lightning protection pre-assembled transformer substation

Abstract

The invention relates to a quadripartion photovoltaic power generation lightning protection pre-assembled transformer substation. The quadripartion photovoltaic power generation lightning protection pre-assembled transformer substation comprises a splitting-winding-type transformer, and a high-voltage power distribution apparatus and a low-pressure power distribution apparatus which are respectively installed at a high-voltage end and a low-voltage end of the splitting-winding-type transformer, wherein the splitting-winding-type transformer consists of an iron core, high-voltage windings which are respectively wound at the outer side of the iron core and low-voltage windings which are respectively wound at the outer side of each high-voltage winding; the high-voltage windings are divided into a first high-voltage winding and a second high-voltage winding; the low-voltage winding is a quadripartion structure consisting of a first low-voltage winding, a second low-voltage winding, a third low-voltage winding and a fourth low-voltage winding; and the high-voltage windings and the low-voltage windings respectively adopt a winding Z-shaped connection method that main segments are in reverse series connection and tapping areas are in parallel connection and respectively adopt a structure that double-pancake coils are alternately arranged, so that the lightning protection quadripartion transformer is realized. The lightning protection characteristic of the photovoltaic power generation transformer is further improved, the production cost of the photovoltaic power generation transformer is reduced, the floor occupation area per unit of a photovoltaic power station is reduced, and the investment cost is saved.

Description

technical field [0001] The invention relates to the technical field of substations, in particular to a four-split photovoltaic power generation lightning protection pre-installed substation. Background technique [0002] At present, photovoltaic inverter technology has reached maturity, and the most commonly used model of large-scale inverters on the market is 500kW. From this, it is known that 500kW is the smallest power generation unit in large-scale photovoltaic power plants. The connection between the power generation unit 4 and the step-up transformer (mainly referring to the connection between the inverter and the transformer) is the first step in the connection between the photovoltaic power station and the power grid, and is also the most critical link. For large-scale centralized photovoltaic systems, the mainstream wiring method is: two 500kW power generation units and a 1000kVA double-split three-winding step-up transformer to form a generator-double-split transfo...

AI Technical Summary

Problems solved by technology

Although this wiring scheme reduces the occupied area to a certain extent and saves the investment cost, there is still a lot of room for improvement.

Moreover, due to the particularity of the installation location and environment of the photovoltaic power generation system itself, the hidden danger of its equipment being damaged by lightning electromagnetic pulses is becoming more and more prominent.

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