柔性直流输电工程技术研究、应用及发展

Research,Application and Development of VSC-HVDC Engineering Technology

柔性直流输电作为新一代直流输电技术,在世界范围内已经得到广泛发展和应用。文中针对柔性直流输电在工程技术、工程应用与未来发展3个方面分别进行了总结和分析。针对柔性直流输电系统主接线、换流器拓扑结构、控制和保护技术、柔性直流电缆、换流阀试验等多方面进行了全面的技术分析,并指出其技术难点以及未来发展的目标和方向。介绍了国内外柔性直流输电工程应用领域及现状,并结合未来电网发展特点及需求,分析了柔性直流输电工程应用的趋势,表明了柔性直流输电技术对促进未来电网的发展具有极其重要的作用。

As a new generation of DC transmission technology,voltage source converter based high voltage direct current（VSC-HVDC） system is being developed and applied worldwide.The engineering technology,engineering application and future development for VSC-HVDC are summarized and analyzed,respectively.A comprehensive technical analysis is made of VSC-HVDC including main circuit design,converter topology,control and protection system,VSC-HVDC cable,converter valve testing etc.to point out the technical barriers and future development directions.This paper also gives an overview of the application and status quo of VSC-HVDC projects in the world.With an eye to the characteristics and demands of future grid development,the engineering application trend of VSC-HVDC projects is demonstrated,which shows that the VSC-HVDC technology has a critical role to play in future grid development.