现代高压直流输电技术及直流阀技术

在最近20年内高压直流晶闸管阀和高压直流输电技术的发展,使得用高压直流输电更经济、更可靠。越来越多的输电线路使用高压直流进行电力传输。现代的高压直流晶闸管阀以组件式结构、大功率和水冷晶闸管、智能晶闸管控制单元、全面的计算机阀控制和严格的试验为特征。容性换流技术、数字式光纤互感器、有源直流滤波器和连续可调交流滤波器的使用,有效地提高了高压直流输电的质量,产生了更健全的高压直流输电系统。作为新一代高压直流换流器的电压控制型换流器,使得小容量电力传输经济可行。

MODERN HVDC THYRISTOR VALVES AND HVDC TRANSMISSION TECHNOLOGIES

Development of HVDC thyristor valves and HVDC transmission technologies in the last two decades makes the electric power transmission by HVDC more economical and reliable nowadays. Using of HVDC for bulk power transmission becomes even blooming. Modern HVDC thyristor valves are characterized in the module design, high power and water-cooled thyristors, intelligent thyristor control unit, comprehensive computer valve control and rigorous tests. The use of capacitor commutated converters, digital optical instrument transformers, active DC filters and continuously turned AC filters enhances the HVDC power transmission quality significantly and yields a more robust HVDC transmission system as a consequence. Voltage source converter as a new generation of HVDC makes the small power transmission economically feasible.