Full
Outline
Due to its advantages of stable power and low cost, the capacitive energy extraction mode is suitable for local power supply scenarios of pole switches in medium-voltage distribution networks. The output characteristics of a capacitive energy extraction circuit are often in an approximate constant-current source range, and the primary voltage is required to normally supply power in the range of 5.7–42 kV under different operating conditions in the meantime, so voltage regulation measures must be taken to provide stable voltage for the load. First, based on the compensation characteristics in the capacitive energy extraction mode, a secondary reactive power compensation mode is proposed to make up for the difference between the energy extraction power and load consumption. Second, a voltage modulation dynamic reactive power compensation scheme based on PWM is put forward, so that the dynamic reactive compensation is realized through dynamic equivalent reactance. Third, a waveform modulation dynamic reactive power compensation scheme is constructed, and the transformer voltage waveform is actively controlled through the H-bridge of the third winding, thus realizing the reactive power dynamic voltage stabilization in the capacitive energy extraction mode. Under the proposed voltage stabilization and regulation scheme, the stable AC voltage output under low heat generation in the capacitive energy extraction mode is realized.
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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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