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Outline
Dry-type core reactors are usually employedas key equipment to achieve reactive compensation in electric power systems on a large scale. However, the vibration noise caused by the magnetostriction effect of core becomes a dominant factor that restrict their applicationsto indoor substations in urban areas. Soft magnetic composites (SMCs) with low magnetostriction and silicon steel were used together as the core material of reactors based on the magnetic flux shunt principle. With the consideration of difference in the efficient permeability between two kinds of materials, the flux in the core is reasonably regulated, so that the larger portion of the flux is carried by the silicon steel component, while the smaller portion flows through the part of SMCs. Based on the design idea, a hybrid-magnetic-circuit (HMC) reactor prototype was designed and fabricated. The research results show that the core losses of HMC reactors were less than those of the pure silicon steel reactor, and thenoise of HMC reactors was less than 60 dB (A), which was lower than that of the silicon steelreactor.
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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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