基于贝瑞隆模型的特高压线路单端暂态电流保护  

Single-ended Transient Current Protection Based on Bergeron Model for the UHV Transmission Lines

作　　者：焦彦军[1] 于江涛[1] 王增平[1] 

机构地区：[1]电力系统保护与动态安全监控教育部重点实验室(华北电力大学),北京市昌平区102206

出　　处：《中国电机工程学报》2010年第16期86-92,共7页Proceedings of the CSEE

摘　　要：提出了一种基于贝瑞隆模型的暂态电流保护新原理。特高压(ultra high voltage,UHV)输电线路的故障电流行波传播过程中,故障初始行波方向与故障方向有关,测量点处第1个行波突变时间间隔与故障距离有关,故障点处在故障行波的母线反射波返回前非故障相中相故障电流为0且故障相的故障电流为故障支路电流的1/2。根据上述特点,利用贝瑞隆模型将单端电气量归算到特定位置并对比归算前后的暂态电流来构成保护,该原理不受网络结构、负荷电流、过渡电阻及故障类型的影响。ATP及Matlab仿真结果证明该方法快速、灵敏、可靠。Based on the Bergeron model, a new principle on single-ended transient current protection is presented. In the propagation of the fault current traveling wave along the ultra high voltage （UHV） line, the spread direction of initial fault traveling wave depends on fault direction, the first interval of traveling wave breaks detected at the measurement point is related to the fault distance, the phase fault current is zero in non-fault phase and is half of the fault branch current at the fault point before the arrival of the wave reflected by bus. According to the above-mentioned features, a protection scheme is put forward by deducing the single-ended electrical quantities to a specific point and comparing the pre-deduced and post-deduced transient currents. The proposed principle is independent of network construction, load current, fault type and transition resistance. The simulation results in ATP and Matlab confirm the principle is rapid, sensitive and reliable.

关 键 词：贝瑞隆模型 特高压线路 单端 暂态电流保护 过渡电阻 归算电流 

分 类 号：TM773[电气工程—电力系统及自动化]