特高压多端直流输电技术应用研究

Research on Application of UHV multi Terminal DC Transmission Technology

由于我国能源中心与负荷中心相距甚远,且随着经济发展,东部沿海地区的电力需求逐渐加大。特高压输电技术成为满足东部地区电力需求,加强能源中心电力外送能力的关键技术。文章针对特高压多端直流输电技术展开分析,阐明特高压多端直流输电技术各种接线方式的技术特点,对比分析了LCC型直流输电技术和MMC直流输电技术在广东电网中的适应性和对系统稳定的影响,通过分析特高压直流输电技术的技术特点和已建成项目的运行情况,结合关键设备研发运行情况,对特高压多端混合直流输电技术的可行性进行了研究。

Because China’s energy center is far from the load center,and with the economic development,the power demand in the eastern coastal areas is gradually increasing.UHV transmission technology has become the key technology to meet the power demand of the eastern region and strengthen the power transmission capacity of the energy center.This paper analyzes the UHV multi terminal DC transmission technology,expounds the technical characteristics of various connection modes of UHV multi terminal DC transmission technology,and compares and analyzes the adaptability of LCC DC transmission technology and MMC DC transmission technology in Guangdong power grid and their impact on system stability;Finally,by analyzing the technical characteristics of UHV DC transmission technology and the operation of completed projects,combined with the R&D and operation of key equipment,the feasibility of UHV multi terminal Hybrid DC transmission technology is analyzed.