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您的检索式：作者名="Fanglei Gao"
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| 1 | Study on lightning protection scheme of multi-terminal MMC-MVDC distribution system显示文摘Based on a±10 kV three-terminal MMC-MVDC(medium voltage DC distribution system based on modular multilevel converter)system,in this study,the authors mainly study on the influencing factors and protection schemes of the lightning intruding overvoltage(including direct lightning and back-flashover lightning).Firstly,a lightning intruding overvoltage simulation model of the MMC-MVDC distribution system using overhead lines is established based on the PSCAD/EMTDC program.The influence of steady-state operating voltage and the number of converter stations on the simulation results are simulated and analysed.Meanwhile,the proper simulation modelling method of the lightning intruding overvoltage for multi-terminal MMC-MVDC system is proposed.Secondly,the lightning intruding overvoltage is simulated when the line is struck by the lightning stroke current that occurs once in 20 years and the different lightning protection schemes are proposed.Finally,based on the lightning impulse withstand voltage,lightning trip-out rate and the cost of the protection schemes,the lightning protection schemes in different scenarios are proposed.The simulation results show that if the cost of the system is prioritised,the protection scheme of increasing the number of parallel stacks of the DL arresters can be selected,and if the power supply reliability of the system is prioritised,the protection scheme of installing the overhead ground wire as well as reducing grounding resistance can be selected. | Yuqun Gao Yongxia Han Fanglei Xiao Changfu Chen Jinghan Zhang Jie Zhang Yaqi Zhang Licheng Li | 2020 | High Voltage2020，5，5： | 1 |
| 2 | Effects of water and salt for groundwater-soil systems on root growth and architecture of Tamarix chinensis in the Yellow River Delta,China显示文摘To test the patterns of the root morphology and architecture indexes of Tamarix chinensis in response to water and salt changes in the two media of the groundwater and soil,three-year-old T.chinensis seedlings were chosen as the research object.Groundwater with four salinity levels was created,and three groundwater level(GL)were applied for each salinity treatment to measure the root growth and architecture indexes.In the fresh water and brackish water treatments,the topological index(TI)of the T.chinensis roots was close to 0.5,and the root architecture was close to a dichotomous branching pattern.In the saline water and saltwater treatments,the TI of the T.chinensis roots was large and close to 1.0,and the root architecture was close to a herringbone-like branching pattern.Under different GLs and salinities,the total root length was significantly greater than the internal link length,the external link length was greater than the internal link length,and the root system showed an outward expansion strategy.The treatment with fresh water and a GL of 1.5 m was the most suitable for T.chinensis root growth,while the root growth of T.chinensis was the worst in the treatment with saline water and a GL of 0.3 m.T.chinensis can adapt to the changes in soil water and salt by regulating the growth and morphological characteristics of the root system.T.chinensis can adapt to high-salt environments by reducing its root branching and to water deficiencies by expanding the distribution and absorption area of the root system. | Jia Sun Ximei Zhao Ying Fang Fanglei Gao Chunhong Wu Jiangbao Xia | 2023 | Journal of Forestry Research2023，34，2： | 0 |
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