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In order to solve the problems of difficult, high cost and poor accuracy of state-of-charge (SOC) estimation for vanadium redox flow batteries (VFB), a joint SOC estimation method is proposed, based on forgetting factor recursive least squares (FFRLS) and multiple innovation unscented Kalman filter (MIUKF). The FFRLS algorithm is used to identify the equivalent circuit model parameters of vanadium redox flow batteries online, and the MIUKF algorithm is used for SOC estimation, so as to achieve the purpose of accurately estimating the SOC of vanadium redox flow batteries. Finally, a 5 kW/30 kW·h vanadium redox flow battery is taken as experimental platform to verify the method. The experimental results show that, compared with the RLS-UKF algorithm and FFRLS-UKF algorithm, the FFRLS-MIUKF algorithm has lower mean square error and root mean square error in the charging and discharging phases, which are 0.003 7, 0.060 9 and 0.001 3, 0.036 3.
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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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