As an excellent front-end rectifier for power supply, the VIENNA rectifier is widely used in medium-to-high voltage and high-power scenarios such as electric vehicle charging piles and wind power generation systems. However, due to the unidirectional flow of its topological energy, there may be current zero-crossing distortion under traditional control methods, resulting in weak reactive power compensation capability. Therefore, based on the analysis of current zero-crossing distortion, a control scheme integrating zero-crossing distortion suppression and reactive power compensation was adopted, with a focus on analyzing the constraints faced by the VIENNA rectifier when providing maximum reactive power compensation capability, as well as the capability of the VIENNA rectifier to provide additional reactive power compensation when delivering different active power to load. Simulation results verify that the adopted control scheme can effectively suppress the zero-crossing distortion of input current of the VIENNA rectifier and thus enhance its reactive power compensation capability.
| 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 |