摘要
带并联电抗器和中性点电抗器的超高压输电线,在瞬时性故障电弧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。
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 are 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.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第2期48-52,共5页
Electric Power Automation Equipment
基金
福建省自然科学基金项目(2008J0011)
福建省科技计划重点项目资助(2009H003)~~
