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| 1 | Active injection protection scheme for flexible HVDC grids based on amplitude of input impedance显示文摘High-voltage direct current(HVDC)grids require fast and reliable protection of the DC lines.The performance of traditional protection schemes is easily impaired by the limitations of the boundary condition and nonlinearity from the control of converters.One of the key technologies for flexible HVDC grids is the half-bridge modular multilevel converter(HB-MMC).Considering the high controllability of HB-MMC,this study proposes an active injection protection scheme to improve the reliability and sensitivity of the HVDC grid protection.The HB-MMC is used to inject a sinusoidal characteristic signal,at the specified frequency,into the DC lines.Then,the voltage and current at the specified frequency are extracted using the Prony algorithm to calculate the input impedance,which is used for the identification of internal and external faults.The active injection protection scheme was simulated for various cases in the simulation software Power Systems Computer Aided Design.The simulation results indicate that the proposed protection scheme is highly reliable and can overcome transition resistance. | Jinghan He Keao Chen Meng Li Yong Tang Ming Nie | 2021 | Global Energy Interconnection2021，4，6： | 11 |
| 2 | Review of protection and fault handling for a flexible DC grid显示文摘With the development of power electronics technology,the flexible DC grid will play a significant role in promoting the transformation and reformation of the power grid.It is immune to commutation failure and has high flexibility in power control and renewable energy grid integration.However,the protection and fault handling technology for a flexible DC grid is a big challenge because of the limited overcurrent capability of the converters.This paper summarizes the development of the flexible DC grid,and analyzes the fault characteristics in detail.Next,the applicability,advantages and disadvantages of the existing protection principle,fault isolation and recovery schemes are reviewed.Finally,the key problems and development trend of the future flexible DC grid are pointed out and forecasted respectively. | Jinghan He Keao Chen Meng Li Yiping Luo Chenguang Liang Yin Xu | 2020 | Protection and Control of Modern Power Systems2020，5，1： | 5 |
| 3 | 显示文摘 | Hu Xiaobin Zhao Binyuan Hu Keao | 2004 | Acta Materialia2004，52，2： | 1 |
| 4 | The friction and wear of nanometer ZnO filled polytetrafluoroethylene 显示文摘 | Li Fei Hu Keao Li Jianlin | 2002 | Wear2002，249，1112： | 1 |
| 5 | The depolymerization mechanism of chitosan by hydrogen peroxide显示文摘 | Feng Tian Yu Liu Keao Hu | 2003 | Journal of Materials Science2003，38，： | 1 |
| 6 | Preparation and electromagnetic wave absorption properties of Fe-doped zinc oxide coated Darium ferrite compositesl显示文摘 | Tang Xin Hu Keao | 2007 | Mater Sci Eng B2007，139，23： | 1 |
| 7 | The friction and wear characteristics of nanometer ZnO filled polytetrafluoroethylene 显示文摘 | Fei Li Keao Hu Jianlin Li | 2002 | Wear2002，249，： | 1 |
| 8 | The microwave electromagnetic and absorption properties of some porous iron powders显示文摘 | Xin Tang Qing Tian Binyuan Zhao Keao Hu | 2006 | Materials Science & Engineering A2006，，： | 1 |
| 9 | The frection and wear characteristics of nanometer ZnO filled polytetraflouroethylene显示文摘 | Fei Li Keao Hu Jianlin Li | 2002 | Wear2002，249，： | 1 |
| 10 | The friction and wear characteristics of nanometer ZnO filled polytetrafluoroethylene 显示文摘 | Li Fei Hu Keao Li Jianlin | 2002 | Wear2002，249，1011： | 1 |
| 11 | The friction and wear characteristics of nanometer ZnO filled polytetrafluoroethylene显示文摘 | Li Fei Hu Keao Li Jianlin | 2002 | Wear2002，249，1011： | 1 |
| 12 | Preparation of Ni/Al2O3 Nanocomposite Powder by High-energy Ball Milling and Subsequent Heat Treatment显示文摘 | Jianlin Li Fei Li Keao Hu | 2004 | Journal of Materials Processing Technology2004，147，： | 1 |
| 13 | TiB2/TiC Nanocomposite Powder Fabricated via High Energy Ball Milling显示文摘 | Jianlin Li Fei Li Keao Hu | 2001 | Journal of the European Ceramic Society2001，21，： | 1 |
| 14 | The Depolymerization Mechanism of Chitosan by Hydrogen Peroxide 显示文摘 | Feng Tian Yu Liu Keao Hu | 2003 | Jounal of Materials Science2003，38，： | 1 |
| 15 | The friction and wear characteristics of nanometer ZnO filled polytetrafluoroethylene显示文摘 | Li Fei Hu Keao Li Jianlin | 2001 | Wear2001，249，1011： | 1 |
| 16 | The depolymerlzation mechanism Of chitosan by hydrogen peroxide 显示文摘 | Feng Tian Yu Liu Keao Hu | 2003 | Journal of materials Science2003，38，： | 1 |
| 17 | Combustion synthesis of γ-lithium aluminate by using various fuels显示文摘 | Li Fei Hu Keao Li Jianlin | 2002 | Journal of Nuclear Materials2002，300，1： | 1 |
| 18 | TiB2/TiC nanocomposite powder fairicated via high energy ball milling显示文摘 | Li Jianlin Li Fei Hu Keao | 2001 | Journal of the European Ceramic Society2001，21，2： | 1 |
| 19 | Preparation and electromagnetic wave absorption properties of Fe-doped zinc oxide coated barium ferrite composites显示文摘 | Tang Xin Hu Keao | 2007 | Mater Sci Eng B2007，，： | 1 |
| 20 | The friction and wear characteristics of nanometer ZnO filled Polytetrafluorothyene显示文摘 | Li Fei Hu Keao Li Jianlin | 2002 | Wear2002，249，： | 1 |
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