多电压等级直流电力系统发展与挑战
摘要：随着新能源发电规模越来越大，输送距离越来越远以及大规模分布式发电和直流负荷的接入，现有的交流电力系统越来越难以满足电力系统发展的需求。由于高压直流输电（high voltage direct current，HVDC）的技术优势，交流电力系统面临的这些挑战，却给直流电力系统的发展带来了新的契机。介绍了欧美各国和我国在高压直流输电系统、中压直流配电系统和低压直流供电系统等不同电压等级直流电力技术的发展现状，分别对高压直流输电技术、中压直流配电技术和低压直流供电技术的应用场景进行了说明，并针对现有交流输电技术的不足，分析了直流电力技术在新能源远距离输电和分布式电源接入等方面的优越性。最后介绍了现有技术水平下直流电力系统发展在关键设备研发、控制保护和标准制定等方面所面临的挑战。
Abstract:With the increasing scale of new energy power generation, longer and longer transmission distances, and access to large-scale distributed generation and DC loads, it is increasingly difficult for existing AC transmission systems to meet the needs of power system development. Due to the technical advantages of high voltage direct current(HVDC), the challenges faced by AC power systems have brought new opportunities for the development of DC power systems. The development status of DC power technologies at different voltage levels in Europe, America, and China were introduced in this paper. The application scenarios of DC power technologies with different voltage levels were described respectively. In light of the shortcomings of existing AC power transmission technologies, the superiority of DC power technologies were analyzed. Finally, the challenges faced by the development of DC power systems under the current state of technology in key equipment R&D, control and protection, and standard setting were introduced.
标题：多电压等级直流电力系统发展与挑战
title:Development and Challenge of DC Power System With Different Voltage Levels
作者：李英彪,梁军,吴广禄,李根
authors:Yingbiao LI,Jun LIANG,Guanglu WU,Gen LI
关键词：新能源发电,直流电力技术,电力电子技术,
keywords:new energy generation,DC power technology,power electronics technology,
发表日期：2018-04-30
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