CAJ | 학술논문

带并联电抗器和中性点电抗器的超高压输电线,在瞬时性故障电孤熄灭后的非全相运行状态下,由并联电抗器、中性点电抗器、线路的分布电容和阻抗形成了复杂的网络.为了探讨该电路特性,通过化简,建立了便于分析、相对精确的、集中参数的暂态分析电路模型.由此推导出拉普拉斯方程,计算出该电路的特征根,得到这种超高压输电线运行状态的特性.与ATP仿真结果比较,证明了电路模型的正确性.根据该方法计算出的故障相电压的自然分量的频率,由此可以提取电压的自然分量与强制分量,自然分量电压幅值与强制分量电压幅值比较值可以作为故障相电弧熄灭的判据.
대병련전항기화중성점전항기적초고압수전선,재순시성고장전고식멸후적비전상운행상태하,유병련전항기、중성점전항기、선로적분포전용화조항형성료복잡적망락.위료탐토해전로특성,통과화간,건립료편우분석、상대정학적、집중삼수적잠태분석전로모형.유차추도출랍보랍사방정,계산출해전로적특정근,득도저충초고압수전선운행상태적특성.여ATP방진결과비교,증명료전로모형적정학성.근거해방법계산출적고장상전압적자연분량적빈솔,유차가이제취전압적자연분량여강제분량,자연분량전압폭치여강제분량전압폭치비교치가이작위고장상전호식멸적판거.
Under the incomplete phase operation of EHV transmission line with shunt reactor and neutral reactor after the extinguishment of transient fault arc,a complex circuit with shunt reactor,neutral reactor,distributed capacitance and distributed impedance is formed.In order to study its characteristics,a relative accurate transient circuit with lumped parameters is set up through simplification,for which the Laplacian equations ale deduced to calculate its eigenvalues and obtain its operational features.Its correctness is verified by the comparison with ATP simulation results. According to the natural component frequency calculated by proposed method for the faulty phase voltage,its natural component and compulsive component are extracted and their ratio can be used as the criterion for arc extinguishment of faulty phase.