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The instability of power generation in photovoltaic power generation system is difficult to avoid, and its instability will cause a great burden on the energy storage system, of which the impact on the service life of the battery is the most serious. Based on extended Kalman Filter (EKF) to achieve supercapacitor state of charge (SOC) estimation, according to the realtime photovoltaic output power and SOC of the supercapacitor, a new controllable topology is controlled to achieve hybrid energy storage of supercapacitor and battery, so as to alleviate the sudden change of battery charging voltage. In MATLAB/Simulink, the simulation model is constructed, the results show that the error of EKF estimating SOC is within 4%, and the fluctuation of the input voltage of the battery is significantly suppressed under the hybrid energy storage strategy, which can effectively reduce the impact of photovoltaic output instability on battery service life.
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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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