To improve the transient-and steady-state performance indexes for an active power filter (APF) and reduce the steady-state switching loss, an APF event triggering control based on a switching model is proposed. By establishing the dynamic model of the APF system and combining with the Lyapunov function, the constraint conditions satisfying the system stability are obtained, according to which the design range of parameters when the system reaches its steady state is analyzed and the switch vector selection method in a normal operation mode is obtained. On this basis, the switching principle for the controller is formulated, so that the APF system can quickly track the target current and reduce the number of switching tube actions on the premise of ensuring the control accuracy when it reaches the steady state. Finally, the correctness and superiority of the proposed design method were proved by simulation and experimental results.
| 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 |