Full
Outline
Island power supply systems typically exhibit weak grid characteristics, and the system frequency and voltage are prone to losing stability. The coordinated operation and control of wind power and hydrogen energy storage according to different characteristics are key solutions to this problem. On this basis, a grid-forming-based coordinated control method for an island wind-hydrogen system is proposed. By applying hydrogen energy storage into the grid-connected system of grid-forming wind turbines, the load fluctuations are suppressed and the frequency regulation capability of the system is enhanced, thereby improving the system’s frequency regulation capability, safety and stability. First, the wind-hydrogen system in island scenarios is modeled, the grid-forming control of a traditional wind turbine on the grid side is improved, and a grid-forming control strategy considering the output from hydrogen energy storage is put forward. Second, to better achieve the frequency regulation effect of hydrogen energy storage on the system frequency, an adaptive primary frequency control strategy for hydrogen energy storage is designed, so as to realize a wind-hydrogen system frequency coordinated support (WHFCS) strategy for the island wind-hydrogen system. Finally, a system model was built on the RT-LAB real-time simulation platform, and the effectiveness of the WHFCS strategy in supporting the frequency of the wind-hydrogen system was verified through comparison. Results show that the proposed control strategy has good applicability for island wind-hydrogen systems under weak grid conditions, providing a new scheme for improving the reliability and stability of island wind-hydrogen systems.
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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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