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According to the characteristics of series resonance circuit, a new model for calculating the dielectric dissipation factor of high-voltage power cable was established, and a new dielectric loss factor calculating formula derived from the differential power of the series resonance circuit was proposed. On the basis of test model, the dielectric dissipation factor of XLPE power cable was calculated by the step-up or step-down process of the series resonance to solve the problem of dielectric dissipation measuring of high voltage and large capacity cable. The results show that the simulation calculating values of circuit parameters and field test results match with the actual values. Compared with conventional electric bridge method, the test method for calculating dielectric dissipation factor based on the resonance characteristic is more accurate to a certain extent. This provides a reference for testing the dielectric dissipation factor of high voltage and high capacity power cable.
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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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