Full
Outline
At present, the integration of large-scale and high-proportion renewable energy into power grids promotes the quick development of electrochemical energy storage stations. However, safety problems frequently occur at electrochemical energy storage stations, and the inadequate protection equipment for energy storage stations restrict their operation and usage. Therefore, it is necessary to develop the fault identification and protection technology for energy storage stations. First, based on the topology of a real energy storage station, the current superposition method is used to derivecalculation formulas forintra-cluster short-circuit fault and inter-cluster short-circuit fault on the DC side of the energy storage station, and the accuracy of the calculation method is verified through asimulation model. Second, through the analysis of short-circuit current under different fault positions and different numbers of short-circuited battery packs, the changes in current at different positions before and after the occurrence of faults are specified, and a fault diagnosis method forthe energy storage station based on current difference is proposed. Finally, the proposed method is verified by calculation and simulation results, indicating that it can effectively identify the intra-cluster short-circuit fault and inter-cluster short-circuit fault on the DC-side of the energy storage station.
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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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