特高压线路熄灭潜供电弧的方法比较

单相自动重合闸的可靠实施与潜供电弧的快速熄灭密切相关.介绍了潜供电孤的产生机理,详细阐述了并联电抗器加中性点小电抗、选择开关式并联电抗器组、串联补偿、快速接地开关、混合式单相触发跳闸等熄弧方法的特点及其应用范围.结合我国在建的特高压输电工程,提出参考性建议:采用高抗中性点加小电抗仍然是目前最可取的方法;开关式并联电抗器组在未来长距离特高压输电线路特别是不换位线路中可以考虑采用;可控电抗器作为理想的补偿措施,还有待于技术进步.

Comparison of secondary arc extinction methods for UHV transmission lines

The reliable single-phase auto-reclose is directly related with the quick extinction of secondary arc.The mechanism of secondary arc is introduced.The features and applicable areas of several secondary arc extinction methods are described,including the four-legged shunt reactors,selectively switched shunt four-reactor bank,series compensation,HSGS(High Speed Grounding Switch),hybrid single-phase trip scheme,etc..Some suggestions are presented regarding the ongoing UHV transmission project in China: the meth...