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In order to further improve the output performance and efficiency of the converter，a grid-connected converter based on heterogeneous device mixing was proposed，referred to as heterogeneous grid-connected converter（HGCC）. The HGCC consists of two half-bridge modules based on SiC MOSFET devices，which are cross-connected by the commutation bridge arm based on Si IGBT devices. Furthermore，the HGCC modulation principle was given. The SiC MOSFET device works in the high-frequency switching state，while the Si IGBT device works in the low-frequency switching state，giving full play to the advantages of low switching loss of SiC devices and low on-state loss of Si devices. Then，the working mode of HGCC was analyzed in detail，and the control block diagram of HGCC and the internal voltage balancing strategy of capacitor were given. Finally，the effectiveness and feasibility of the proposed topology and control strategy was verified by simulation.
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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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