High-frequency isolated three-phase cycloconverter type two-way converter and control method thereof
A technology of cycloconverter and bidirectional converter, which is applied in the direction of converting AC power input to DC power output, with reversible conversion equipment, output power conversion device, etc., and can solve the problem that the reactive current component of the filter capacitor cannot be eliminated , increase the voltage conversion range of the DC side, and fail to realize bidirectional flow of power, etc., to achieve the effects of compact structure, wide voltage adjustment range, and high power density
Inactive Publication Date: 2011-05-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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Transformation of the power frequency transformer increases the weight and volume of the converter again, and greatly increases the cost of the converter. The noise pollution of the power frequency transformer cannot be ignored
IEEE Trans.on Power Electronics [Journal of Power Electronics] published the article "Three-Phase Boost-Type Grid-Connected Inverter" [Three-Phase Boost-Type Grid-Connected Inverter] in the fifth issue of 2008, using the boo
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[0020] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0021] Please refer to figure 1 , shows a bidirectional converter, including a controller 10 , a sampling circuit 30 , a main circuit 50 and a driving circuit 70 .
[0022] The controller 10 includes a digital signal processing chip 11 , a complex programmable logic device 13 and a general input and output circuit 15 . The digital signal processing chip includes an event manager module EVA and an event manager module EVB. EVA includes a general-purpose timer 1 and a comparison unit 112 , and EVB includes a passing timer 3 and a comparison unit 114 . Among them, the general-purpose timer 1 adopts the single-increment counting method, and the general-purpose timer 3 adopts the counting method of increasing first and then decreasin...
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The invention provides a high-frequency isolated three-phase cycloconverter type two-way converter and a control method thereof, which belongs to the three-phase high-frequency isolated converter in the field of power electronics and is suitable for charging and discharging a storage battery pack, a supercapcitor set and other energy storage devices. A main circuit is in a structure comprising an input filter, a three-phase cycloconverter, a high-frequency transformer, a full-bridge converter and an output direct current inductor, wherein a switch of the cycloconverter is in time-division drive to ensure the one-way flowing of the power and further realize the soft current conversion. The switching of two modes of rectification and inversion can be realized by changing the power flowing direction of the cycloconverter; the three-phase cycloconverter is modulated by digitalized alternating current space vector; and the alternating current adopts a control method of mixing a d-p decoupling, the proportional-integral (PI) and the repetition (RP). The two-way converter has the advantages of high power density, high efficiency, wide adjusting range of direct current side voltage and electrical isolation for input and output; and the input of unit power factors can be realized and the current harmonics can be effectively inhibited.
Description
technical field [0001] The invention provides a high-frequency isolated three-phase cycloconverter type bidirectional converter and a control method thereof. It belongs to the direction of three-phase high-frequency isolated converters in the field of power electronics. Background technique [0002] With the development of power electronics technology, energy storage systems are gradually being used in various fields, including valley-peak regulation of power grids, power storage of electric vehicles, etc. The key equipment in the energy storage system is a bidirectional converter, which connects the grid and the energy storage device through the bidirectional converter, which can not only inject the energy of the grid into the energy storage device, but also feed back the energy in the energy storage device to the grid. At present, the widely used energy storage devices such as battery packs and supercapacitor packs have very low terminal voltages and need to be boosted be...
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Inventor 沙德尚秦子安吴丹廖晓钟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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