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This paper studies the vulnerability assessment of distribution lines with multitype distributed power access. Firstly, in view of the uncertainty of distributed generation, the Latin hypercube sampling and synchronous back substitution method are used to generate the classic output scenarios of wind and light. Based on the complex network theory and power flow analysis, the vulnerability assessment indexes such as improved line betweenness, improved line degree, line voltage stability and fault loss are proposed from three aspects of power grid structure, operation state and fault influence. Secondly, a comprehensive evaluation model of game theoryVIKOR based on the correction weight of time series fluctuation characteristics is proposed to evaluate the vulnerability of the line. Then, the simulation verification is carried out based on the example of IEEE33 node system. The results show that the constructed index and evaluation model can accurately reflect the realtime fragile state of the line and conform to the time series fluctuation characteristics of source and load. Finally, based on the comprehensive vulnerability of lines in each period, combined with the distribution characteristics of line vulnerability in each period, the real vulnerability of the whole system line in different periods is further analyzed, which provides a theoretical basis for risk aversion of distribution network with distributed generation.
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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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