Three-port high-reliability sepic DC-DC converter
A converter and reliability technology, applied in the direction of climate sustainability, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problems of high energy conversion times, low energy utilization rate, input and output voltage gain, etc., and achieve expansion Application range, reducing the number of energy conversions, and improving the effect of energy utilization
Pending Publication Date: 2022-01-04
CHINA THREE GORGES UNIV
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Problems solved by technology
[0005] In view of the deficiencies of the above-mentioned prior art, in order to solve the problems caused by the parallel structure of the energy storage unit, the number of energy conversions is too high, the energy utilization rate is low, and the input and output voltage gain is increased.
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[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0045] Such as figure 1 As shown, a three-port high-reliability sepic DC-DC converter includes: an input unit A, a first boost unit B, a second boost unit C, and a load unit D;
[0046] The input unit A includes five inductors L 1 , L 2 , L 3 , L 4 , L 5 , five capacitors C 1 、C 2 、C 3 、C 4 、C 5 , three power switches S 1 , S 2 , S 3 , four diodes D 1 、D 2 、D 3 、D 4 ;
[0047] The anode of the PV module is connected to the diode D 1 anode, diode D 1 Cathode connection inductance L 1 One end, the inductance L 1 The other end is respectively connected to the power switch S 1 Drain, capacitance C 5 One end, capacitor C 3 At one end, the capacitor C 3 The other end is connected to the inductor L 3 One end, diode D 3 anode, diode D 3 Cathode connection capacitance C 1 At one end, the capacitor C 1 The other end, the inductance L 3 Th...
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A three-port high-reliability sepic DC-DC converter comprises an input unit, a first boosting unit, a second boosting unit and a load unit which are sequentially connected, wherein the input unit comprises inductors L1, L2, L3, L4 and L5, capacitors C1, C2, C3, C4 and C5, power switches S1, S2 and S3 and diodes D1, D2, D3 and D4; the first boosting unit comprises an inductor L6, a capacitor C6, a capacitor C9 and a diode D6, and the second boosting unit comprises an inductor L7, a capacitor C7, a capacitor C8 and a diode D7. Compared with an existing scheme, the three-port high-reliability sepic DC-DC converter has the advantages that the electric energy conversion frequency among a micro power supply, a storage battery and a load can be remarkably reduced, the electric energy conversion efficiency is improved, the input and output voltage regulation range is wide, the voltage stress of a switching device is low and the like, and 2N paths of boost expansion can be realized.
Description
technical field [0001] The invention relates to a DC-DC converter, in particular to a three-port high-reliability sepic 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. [0003] 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 improving...
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IPC IPC(8): H02M3/158H02M1/088H02M1/42H02J7/35H02J7/00H02J1/10
CPCH02M3/1582H02M1/088H02M1/42H02J7/35H02J7/0063H02J1/10Y02B70/10Y02E10/56
Inventor 邾玢鑫戴俊平张耀杨楠马辉支树播王凯宏
Owner CHINA THREE GORGES UNIV