半波长交流输电线路的潜供电弧特性与单相自动重合闸

阐述了半波长交流输电线路的运行特性,给出了其沿线电压、电流的分布规律。通过建立简化的输电线路电磁耦合模型,给出了理想半波长交流输电线路的潜供电流及弧道恢复电压的表达式。研究了线路传输功率、人工调谐网络、线路长度等对潜供电流与恢复电压的影响,结果表明半波长交流输电线路潜供电流与恢复电压分布规律与常规线路截然不同。提出了基...

Secondary Arc Characteristics and Single-phase Auto-reclosure Scheme of Half-wavelength Transmission Lines

Half-wavelength alternating current transmission line(HWACTL) has been drawing attention all over the world due to its remarkable economical and technological advantages.In addition to introducing the operating characteristics of HWACTL,its voltage and current distribution is also discussed.Equations describing the secondary arc current and the recovery voltage of HWACTL are given through building up electromagnetic coupled model of transmission line.Furthermore,the impacts of transmission power,man-made tuning network and line length,etc.on the secondary arc current and the recovery voltage are investigated in comparison with typical short lines.The uneven optimal arrangements of high speed grounding switch(HSGS) along the transmission line are studied in order to cut down the secondary arc current and therefore shorten the arcing time.An optimized HSGS arrangement is proposed and validated with a dynamic secondary arc model in detail.Finally,the optimal time sequence for single-phase auto-reclosure scheme of HWACTL with HSGS is put forward.