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近年来,随着我国经济发达区域对电力需求的迅猛增长,国家电网快速推进特高压线路的建设。特高压线路提高了电能输送距离,降低输电成本,使得电力能源从资源充足的中西部地区向东西部输送,实现资源优化,是国家电网建设中的重点之一。特高压输电线路长度一般在1000km以上,交流特高压站间距离一般在300~500km左右,直流输电系统换流站的站间距离更可达到上千公里。对配套光通信系统的超长距传输提出更严苛的要求。
In recent years, with the rapid growth of electricity demand in economically developed regions of our country, the State Grid rapidly pushed forward the construction of UHV lines. UHV transmission lines improve the transmission distance of electric energy and reduce the transmission cost. As a result, the transmission of electric energy from the central and western regions with sufficient resources to the eastern and western regions achieves resource optimization, which is one of the key points in the construction of the national power grid. The length of UHV transmission line is generally over 1000km, the distance between UHV stations is about 300 ~ 500km, and the distance between stations of DC transmission system can reach more than one thousand kilometers. On the optical communication system supporting ultra-long-distance transmission made more stringent requirements.