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For regional integrated energy system containing a high proportion of renewable energy, "quantity" and "quality" of energy are both discussed under "Exergy" concept and a twolayer optimization method considering exergy efficiency is proposed. Firstly, a model of multi – energy coupling of electricity, gas, heat and cold was established, and exergy analysis of energy and equipment is implemented. Then, a twolayer optimization model is established that considers system capacity planning and dispatching operation. The upper layer takes exergy efficiency and economy as the optimization goal for capacity allocation, while the lower layer takes the lowest operating cost as the optimization goal for unit output, therefore the best capacity allocation and operation scheduling scheme are obtained. Finally, a regional integrated energy system case is selected, and different schemes are analyzed for comparison. The result shows that the twolayer optimization method proposed in this paper can provide a better planning and scheduling scheme for the regional integrated energy system, while the exergy efficiency can characterize the actual level of energy utilization precisely and achieve highquality energy use.
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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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