Full
Outline
At present, the wind and photovoltaic (PV) power generation units still face the problem of a lack of flexibility due to the dual roles of intermittency of resources such as solar and wind energy and real-time fluctuations in power grid. Therefore, the studies of the flexibility assessment of wind and PV power generation units and the corresponding enhancement strategy are critical. Aimed at both the quantification of flexibility assessment and the flexibility control strategies, a flexibility assessment system is explored at first, i.e., the flexibility assessment indexes are selected from the aspects of power output capability, stability, voltage support capability, etc., and the flexibility of wind and PV power generation units under different control strategies is quantified based on the CRITIC weight method. Second, based on the flexibility assessment results, a control strategy with an advantage in flexibility is selected for wind and PV power generation units, and non-perturbative switching is carried out, so as to realize the flexibility control of wind and PV power generation units. Finally, the feasibility of the proposed approach was verified by simulations conducted on a model of a high-power PV grid-connected converter applied in practice.
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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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