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Multi-condition high-gain multi-port DC/DC converter

A high-gain, multi-port technology, applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, etc., can solve the problems of high energy conversion times and low energy utilization rate, achieve high gain and improve energy utilization rate, the effect of reducing the number of energy conversions

Active Publication Date: 2018-05-29
CHINA THREE GORGES UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the deficiencies of the above-mentioned prior art, the present invention focuses on solving the problems of many times of energy conversion caused by the parallel structure of the energy storage unit, low energy utilization rate and improving the input and output voltage gain, etc., and proposes a multi-mode high-gain multi-port DC / DC converter

Method used

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Embodiment Construction

[0022] Such as figure 1 As shown, a multi-mode high-gain multi-port DC / DC converter is composed of an input unit A, an interleaved parallel connection and a voltage doubling unit B, and a load unit C; the multi-mode high-gain DC / DC converter includes a Unidirectional output port u pv , a bidirectional port u b and a load R, switch S 1 , S 2 The switching tube of the main circuit adopts the interleaving control method to adjust the output voltage, S 3 and VD 2 is the energy storage unit u b The charging branch can change the charging voltage by changing the duty cycle of S3, S 4 is the energy storage unit u b discharge branch, changing S 4 The duty cycle can control the energy storage unit u b Output power size, S 5 Coordinated control of the converter switches between several states.

[0023] The converter can work in different states according to different environmental conditions and load power requirements: SIDO, SISO, DISO and SISO four states.

[0024] State (...

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Abstract

The invention provides a multi-condition high-gain multi-port DC / DC converter which comprises an input unit A, an interleaving and voltage doubling unit B and a load unit C. The input unit A includesat least one new energy micro power supply upv, a storage battery energy storage unit ub, diodes VD2, VD3 and switch tubes S3, S4 and S5. The interleaving and voltage doubling unit B comprises two inductors L1 and L2, two main circuit power switch tubes S1 and S2 and one voltage doubling unit formed by a diode VD2 and a capacitor C1. The load unit comprises an output diode VDo, an output filteringcapacitor Co and a load R. Compared with an existing scheme, the scheme of the converter has the advantages that number of times of power conversions among the micro power supply, a storage battery and the load can be significantly reduced, the power conversion efficiency is improved, and N-channel input expansion can be achieved at the same time.

Description

technical field [0001] The invention relates to a DC / DC converter, in particular to a multi-working condition high-gain multi-port DC / DC converter. Background technique [0002] With the increasing global problems such as energy crisis, greenhouse effect and air pollution, new energy power generation technologies such as photovoltaic power generation and fuel cell power generation have received extensive attention and rapid development. New energy power generation systems including energy storage units can smooth new energy The power generation output of the micro power supply improves the stability of the system power supply. In the traditional hybrid multi-port converter solution, the new energy micro power supply and energy storage unit are generally connected in parallel with the DC bus through their respective DC / DC converters, although this structure can solve the problem of energy storage unit balancing the power generation output of the micro power supply and improvi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/1584
Inventor 邾玢鑫陈耀王辉曾庆典李圣乾
Owner CHINA THREE GORGES UNIV
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