摘要
针对潜供电弧状态对超高压线路单相自动重合闸影响的问题,提出了一种基于故障相电压谐波情况的电弧状态判断方法.该方法在分析了一次及二次电弧的特性及不同补偿度下电弧熄灭后系统振荡特性的基础上,通过引入总谐波畸变(THD)来反映故障相电压谐波含量的变化.对不同补偿度的系统运用EMTP进行了仿真,结果表明电弧熄灭后,故障点电压的THD值将显著降低,为利用故障点电压的谐波情况来判断电弧状态提供了依据.
Considering the importance of the status of secondary arc to the single-phase autoreclosure of extra high voltage transmission line, a novel approach based on the harmonic of faulted phase is proposed to determine the arc status, where the characteristics of the prime and secondary arcs and the oscillation of the faulted phase with different compensation levels are analyzed, then the total harmonic distortion （THD） is introduced to reflect the harmonic content of the faulted phase. The EMTP simulations at different compensation levels indicate that after the arc extinction, the THD of the faulted phase gets distinctly low to judge arc status.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2007年第6期712-716,共5页
Journal of Xi'an Jiaotong University
关键词
超高压线路
补偿度
单相自动重合闸
潜供电弧
总谐波畸变
extra high voltage transmission line
compensation level
single-phase auto-reclosure
secondary arc
total harmonic distortion
