Fine design method for voltage and current transmission ratio of high-frequency transformer

Abstract

The invention discloses a fine design method for a voltage and current transmission ratio of a high-frequency transformer. The method comprises the steps of A, building a voltage and current transmission function of the high-frequency transformer, and acquiring transmission characteristic resonant property; B, proposing design constraint of the transmission ratio of the high-frequency transformer; and C, achieving design of the transmission ratio of the high-frequency transformer. By the method, the voltage and current transmission ratio of the high-frequency transformer can be approximate to a turn ratio of a winding, so that expected voltage and current conversion of the high-frequency transformer is enabled to be achieved, and the method has certain guidance significance to optimal design of the high-frequency transformer.

Description

technical field [0001] The invention belongs to the technical field of power system analysis, and in particular relates to a refined design method for the voltage and current transmission ratio of a high-frequency transformer. Background technique [0002] With the shortage of traditional energy sources and the intensification of environmental problems, large-scale renewable energy generation has received extensive attention. my country has vigorously developed large-scale offshore wind farm power generation and other forms of DC power, such as photovoltaic power, electrochemical battery energy storage and fuel cell power. However, limited by the accommodation capacity of the power system and the intermittent and random characteristics of renewable energy generation, the traditional power grid is increasingly constrained in accepting large-scale renewable energy, and the establishment of a DC power grid is a solution to this problem. effective way. The high-power DC-DC con...

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Problems solved by technology

However, due to the influence of parasitic parameters at high frequencies, the voltage and current transfer characteristics of the transformer will change with the frequency, which may make the voltage and current transfer ratio of the transformer no longer equal to the winding turns ratio

This will cause the high-frequency transformer to fail to achieve the expected voltage or current conversion, which will seriously affect the normal operation of the DC-DC converter

At present, the influence mechanism of parasitic parameters on the voltage and current transmission characteristics of high-frequency transformers is still unclear, and there is a lack of fine design methods for corresponding voltage and current transmission ratios.

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