高压直流输电技术的发展及其在电网中的作用

Development of HVDC Transmission Technology and Its Role in Electric Power Network

高压直流输电技术自1954年问世以来,由于其对高电压、大功率、长距离、不同步运行2个交流电网的联结,改善交流电网的稳定性等方面具有独到优点,加上电力电子技术的进步,近50a来,已取得很大发展。称之为直流输电心脏的关键部件-换流阀也随着电子技术发展,从汞弧阀发展成为现代的可控硅阀,世界上许多科技人员正进一步研制新型的更完美的换流阀。微型计算机控制和保护的开发应用,又使得直流输电的控制功能更完善,性能更优越。文章就我国南方交直流联网的问题提出一些建设性意见。

HVDC transmission technology has been developing greatly since1954,because it has special advantages on the high voltage,high power,long distance transmission and the link between two AC power systems for improving power system stability and so on.The key part of HVDC transmission,converter valve,had developed from mercury valve into thyristor valve.Some new types of converter are developing now on the world and getting some progresses.As for the use of microcomputer in HVDC control and the protection,it makes the HVDC control function and performance more and more perfect.This paper presents some proposals for South China AC&DC power network link.