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Outline
Diode rectifier unit (DRU) based offshore wind power delivery scheme can reduce the volume and weight of offshore platforms and thus save a lot of operation and maintenance costs. However, the DRU does not have commutation controllability, and its flexibility is poor when power fluctuations occur in the wind farm. This paper first establishes a topological model of a wind farm composed of three-phase permanent magnet synchronous generators connected in parallel with a DRU and an auxiliary voltage-source converter (VSC) for power transmission.) Secondly, the grid-froming control strategy of the grid side converter and the grid-following control strategy of VSC are adopted respectively. Finally, a RT-LAB semi-physical simulation system is built based on Matab/simulink. The results show that the proposed control strategy realizes the auxiliary VSC control of reactive power and DRU output power of wind turbines.
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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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