Full
Outline
Aiming at the problems of excessive vibration, high noise and low efficiency existing in the same-speed reverse power generation of Huaiyin No.2 Pumping Station, a scheme including a four-quadrant frequency converter, a bypass system and protection setting is proposed, and its mechanism of action in the reverse power generation process is analyzed. The three-stage architecture of the four-quadrant frequency conversion system provides a topological basis for bidirectional energy flow. The interlocking mechanism of the bypass system solves the safety problem of multi-condition switching. The hierarchical protection system realizes the risk control of the whole life cycle of equipment. The vibration online monitoring system and energy efficiency curve comparison are used to verify the effect. The results show that under the four-quadrant frequency conversion speed reduction power generation mode, the vibration amplitude of the impeller chamber is reduced by 78.11%, the power generation efficiency is increased by 45.05%, and the noise is reduced by 10 dB. Various performances are significantly improved, which provides theoretical support for the standardization of reverse power generation technology in low-lift pumping stations.
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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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