Full
Outline
To address the problems of lower power density and fewer application scenarios of a traditional multi-stage AC-DC bidirectional converter, a novel AC-DC bidirectional converter with adjustable frequency output on AC side is proposed. A matrix frequency conversion circuit is used instead of a full-bridge circuit, and the two working mode control methods of rectification and inversion are combined to realize a single-stage AC-AC frequency conversion function of the converter without DC links, so that the converter can add a flexible energy outgoing function of new energy electric vehicles on the basis of satisfying the vehicle-to-grid energy interaction strategy. At the control level, when the converter works in an inversion mode, proportional resonance control will be used to obtain lower total harmonic distortion and adjustable frequency characteristics, so as to cover more AC-side electrical requirements. When the converter works in a rectification mode, the average current control based on CCM mode can ensure a high value of power factor on the AC side and a stable voltage output on the DC side. Finally, a MATLAB/Simulink simulation model and a hardware experimental platform were built to verify the scheme, and results proved the correctness and effectiveness of the proposed topology.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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