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| 1 | The Single-active-part Structure of the UHVDC Converter Transformer with the UHVAC Power Grid显示文摘The studied sending-terminal’s UHVDC converter transformer with the UHVAC grid is currently one of the largest-capacity converter transformers,which is characterized by strong support for the large-scale grid power delivering out,strengthening grid’s fault tolerance and backup capability,improving grid operation’s flexibility and security,lowering the short-circuit currents.The proposed single-active-part converter transformer structure is well-designed,including the single-phase five-leg iron core,the special winding arrangement,the special structure of the spacers and angle rings,and so on,which is a smaller footprint,easier to install and test on site,but is more challenging in the structural design due to the critical railway transportation limitations on aspects of both size and weight.The feasibility of the proposed structure schema is verified by a series of tests,concerning the wave process,the short circuit force,the temperature field,the main insulation,and so on.Among them,the main insulation’s electric fields at the import positions are verified to be reasonable,including the AC impressed voltage test,the DC impressed voltage test,and the polarity reversal test.It shows that the proposed single-active-part design scheme is practicable and conductive to manufacture and application for the UHV large-capacity converter transformers. | Yun Liu Guangfan Li Lan Guan Zhi Li | 2017 | CSEE Journal of Power and Energy Systems2017，3，3： | 2 |
| 2 | Space charge phenomena in oil-paper insulation materials under high voltage direct current显示文摘 | Zhou Yuanxiang Wang Yunshan Li Guangfan | 2009 | Journal of Electrostatics2009，67，23： | 1 |
| 3 | Corona onset voltage of bipolar bundle conductors of HVDC transmission line显示文摘 | Li Zhongxin Li Guangfan Fan Jianbin | 2011 | IEEE Transactions on Power Delivery2011，26，2： | 1 |
| 4 | Numerical calculations of monopolar corona from the bare bundle conductors of HVDC transmission lines显示文摘 | LI Zhongxin LI Guangfan FAN Jianbin | 2009 | IEEE Transactions on Power Delivery2009，24，3： | 1 |
| 5 | Space charge phenomena in oil-paper insulation materials under high voltage direct current显示文摘 | Zhou Yuanxiang Wang Yunshan Li Guangfan | 2009 | Journal of Electrostatics2009，67，： | 1 |
| 6 | Space charge phenomena in oil-paper insulation materials under high voltage direct current显示文摘 | Yuanxiang Zhou Yunshan Wang Guangfan Li | 2009 | Journal of Electrostatics2009，67，23： | 1 |
| 7 | Space charge phenomena in oil-paper insulation materials under high voltage direct current显示文摘 | Zhou Yuanxiang Wang Yunshan Li Guangfan | 2009 | Journal ofElactrostatics2009，67，23： | 1 |
| 8 | Space charge phenomena in oil-paper insulation materials under high voltage direct current显示文摘 | Zhou Yuanxiang Wang Yunshan Li Guangfan | 2009 | Journal of Electrostatics2009，67，23： | 1 |
| 9 | Space charge phenomena in oil-paper insulation materials under high voltage direct current显示文摘 | Zhou Yuanxiang Wang Yunshan Li Guangfan | 2009 | Journal of Electrostatics2009，67，23： | 1 |
| 10 | Numerical calculations of monopolar corona from the hare bundle conductors of HVDC transmission nines显示文摘 | Li Zhongxin Li Guangfan Fan Jianbin | 2009 | IEEE Transactions on Power Delivery2009，24，3： | 1 |
| 11 | The de- sign and implement of virtual instrument based on computing technique and USB platform显示文摘 | SHI Guangfan YAN Guangming LI Jigang | 2005 | IEEE2005，17，18： | 1 |
| 12 | Experimental method and research evolution of strength prediction of cement concrete显示文摘 | LI Guangfan HUANG Yong CHEN Chaohe | 2011 | Advanced Materials Research2011，250，5： | 1 |
| 13 | Study on multi-objective optimization design method for SRHSC beams显示文摘 | CHEN Chaohe HUANG Yong LI Guangfan | 2011 | Advanced Materials Research2011，，4： | 1 |
| 14 | Numerical calculation of grounding system buried in vertical earth model in low frequency domain based on the boundary element method显示文摘 | Li Zhongxin Li Guangfan Fan Jianbin | 2009 | European Transactions on Electrical Power2009，19，8： | 1 |
| 15 | Space charge phenomena in oil-paper insulation material under high voltage direct current显示文摘 | Zhou Yuanxiang Wang Yunshan Li Guangfan | 2009 | Journal of Electrostatics2009，67，23： | 1 |
| 16 | Space charge phenomena in oil-paper insulation materials under high voltage direct current显示文摘 | Zhou Yuanxiang Wang Yunshan Li Guangfan | 2009 | Journal of Electrostatics2009，67，23： | 1 |
| 17 | Function and Design Idea of UHVDC Test Base显示文摘The function of the UHVDC test base of the State Grid Corporation of China (SGCC) is oriented to serve UHVDC power transmission and substation projects, especially power transmission from West China to East China, and to promote localization of UHVDC transmission and substation equipment. In essentials, this test base consists of UHVDC test transmission line, corona cage, outdoor test site, UHV test hall, pollution and environment laboratory, electromagnetic environment simulation test site, insulator laboratory, arrester laboratory and live equipment test field. This paper introduces the function and design idea of the test base, presents the main performance parameters of the above-mentioned test facilities, and summarizes the matters of concern when siting and planning. | Yu Yongqing, Li Guangfan, Sun Lin, Su Zhiyi and Lu Jiayu China Electric Power Research Institute Zhao Fang | 2009 | Electricity2009，20，1： | 0 |
| 18 | Functions and Design Scheme of Tibet High Altitude Test Base显示文摘The functional orientation of the Tibet High Altitude Test Base, subordinated to the State Grid Corporation of China (SGCC), is to serve power transmission projects in high altitude areas, especially to provide technical support for southwestern hydropower delivery projects by UHVDC transmission and Qinghai-Tibet grid interconnection project. This paper presents the matters concerned during siting and planning, functions, design scheme, the main performances and parameters of the test facilities, as well as the tests and research tasks already carried out. | Yu Yongqing, Li Guangfan, Fan Jianbin, Lu Jiayu, Su Zhiyi, Li Peng, Li Qingfeng, Liao Weiming, Zhou Jun, Guo Jian, Yin Yu and Mao Yan China Electric Power Research Institute Li Peng | 2010 | Electricity2010，21，2： | 0 |
| 19 | Visible Light-Mediated Cobalt and Photoredox Dual-Catalyzed Asymmetric Reductive Coupling for Axially Chiral Secondary Alcohols显示文摘Secondary alcohols bearing both axial and central chirality comprise attractive biological activity and exhibit excellent chiral induction in asymmetric reactions.However,only very limited asymmetric catalytic approaches were developed for their synthesis.We herein describe visible light-mediated cobalt-catalyzed asymmetric reductive Grignard-type addition of aryl iodides with axially prochiral biaryl dialdehydes leading to the direct construction of axially chiral secondary alcohols.Preliminary mechanistic studies indicate that efficient kinetic recognition of diastereomers might occur for axially prochiral dialdehydes to improve the stereoselectivity,which might open a new avenue for the challenging cascade construction of multiple chiral elements.This protocol features excellent enantio-and diastereoselectivity,green and mild conditions,simple operation,and broad substrate scope,providing a modular platform for the synthesis of secondary axially chiral alcohols. | Tianlong Liang Yingtao Wu Jiaqiong Sun Mingrui Li Huaqiu Zhao Jingjing Zhang Guangfan Zheng Qian Zhang | 2023 | Chinese Journal of Chemistry2023，41，23： | 0 |
| 20 | Visible light-mediated NHCs and photoredox co-catalyzed radical 1,2-dicarbonylation of alkenes for 1,4-diketones显示文摘Alkenes are ubiquitous,and the difunctionalization of alkenes represents one of the most practical approaches for the construction of value-added compounds.Dicarbonylation of alkenes provides direct access to value-added 1,4-dicarbonyl compounds.However,selectivity control for unsymmetric 1,2-dicarbonylation is of great challenge.We herein describe NHCs and photocatalysis co-catalyzed three-component radical 1,2-dicarbonylation of alkenes by distinguishing two carbonyl groups,providing structurally diversified 1,4-diketones.Distinct properties of acyl radical and NHCs-stabilized ketyl radical contributed to selectivity control.Acyl radicals are rapidly added to alkenes delivering alkyl radicals,which undergo subsequent radicalradical cross-coupling with NHCs-stabilized ketyl-type radicals,affording 1,2-dicarbonylation products.This transformation features mild reaction conditions,broad substrate scope,and excellent selectivity,providing a general and practical approach for the dicarbonylation of olefins. | Lihong Wang Jiaqiong Sun Jiuli Xia Mingrui Li Lianjin Zhang Ruiyang Ma Guangfan Zheng Qian Zhang | 2022 | Science China Chemistry2022，65，10： | 0 |
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