CAJ | 학술논문

高压直流输电线路故障行波传播特性研究多采用无损传输线模型作为研究对象而未考虑行波色散的影响；直流线路行波保护研究通常未考虑线路末端设备的影响。分析了故障行波沿直流线路传播产生色散的原因、特点以及影响因素；分析了直流线路末端设备对故障行波中不同频率分量的影响。在此基础上研究了行波色散及末端设备对行波保护的影响。研究表明：故障行波的色散主要体现在其地模分量上。故障行波波头幅值的变化影响行波保护的电压变化量判据，受前述两因素的共同作用；故障行波波头陡度的变化影响电压变化率判据，受行波色散影响有限，主要由故障行波的线模分量确定。
고압직류수전선로고장행파전파특성연구다채용무손전수선모형작위연구대상이미고필행파색산적영향；직류선로행파보호연구통상미고필선로말단설비적영향。분석료고장행파연직류선로전파산생색산적원인、특점이급영향인소；분석료직류선로말단설비대고장행파중불동빈솔분량적영향。재차기출상연구료행파색산급말단설비대행파보호적영향。연구표명：고장행파적색산주요체현재기지모분량상。고장행파파두폭치적변화영향행파보호적전압변화량판거，수전술량인소적공동작용；고장행파파두두도적변화영향전압변화솔판거，수행파색산영향유한，주요유고장행파적선모분량학정。
The lossless transmission line model is widely used in research of propagation characteristic of fault traveling wave on HVDC line, but traveling wave dispersion is not considered in the model. And the influence of DC line terminal devices is not considered in research of traveling wave protection (TWP). The causation, the characteristic and the influencing factors of fault traveling wave dispersion are analyzed in detail. Influence of DC line terminal devices on the reflection of different frequency component of fault traveling wave is also analyzed. And then, influence of the forenamed two factors on TWP is studied. It is shown that dispersion mainly affects the earth mode component of fault traveling wave. Both the forenamed two factors also have effect on the amplitude of fault traveling wave, which affects the criterion of voltage change of TWP;the fault traveling wave gradient, which affects the criterion of voltage change rate of TWP, is affected limitedly by dispersion. And it can be confirmed by the aerial mode component of fault traveling wave.