混合直流输电技术及发展分析

混合直流输电系统结合常规直流输电系统和柔性直流输电系统的优点,是一种新型直流输电拓扑结构。文中从混合直流输电系统的主接线和换流器拓扑结构、控制和保护技术等方面进行了系统分析,指出了混合直流输电技术的难点及未来的发展目标和方向。介绍了混合直流输电技术可能适用的场景及目前的应用现状。最后结合中国能源发展战略和未来电网的发展特点及需求,分析了混合直流输电技术研究及工程应用的趋势。

Hybrid High-voltage Direct Current Transmission Technology and Its Development Analysis

By combining the merits of the line commutation converter based HVDC(LCC-HVDC)and the voltage source converter based HVDC(VSC-HVDC), we have the hybrid high-voltage direct current(HVDC)transmission system that is a new topology of HVDC. A comprehensive technical analysis is made of hybrid-HVDC including the main circuit design, converter topology, control and protection system, to point out the technical barriers and future development directions. An overview of the application and status quo of hybrid-HVDC projects across the world is also given. With an eye to China''s energy development strategy, characteristics and demands of future grid advancement, the research and engineering application trend of hybrid-HVDC projects is demonstrated, which shows that the hybrid-HVDC technology has a critical role to play in the future grid arena.