特高压长线路单相自适应重合闸的新原理  

Research of Single-phase Self-adaptive Reclosure for UHV Long Transmission Lines

作　　者：郭征[1] 贺家李[2] 王俊[3] 

机构地区：[1]上海市电力公司市东供电公司,上海200122 [2]天津大学电气与自动化工程学院,天津300072 [3]上海交通大学电气工程系,上海200240

出　　处：《高电压技术》2009年第5期1005-1008,共4页High Voltage Engineering

摘　　要：实现自适应重合闸的方法已经很多,但是将输电线贝瑞隆模型应用其中的,国内外还没有见到,因此提出了基于贝瑞隆模型的特高压长线路单相自适应重合闸的新原理。具体方法是在单相重合前,保护使用贝瑞隆模型计算线路故障点两侧的电流,进而求出故障点处的潜供电流,然后根据其有无,来区分线路是永久性故障还是瞬时性故障,从而达到避免重合于永久性故障的目的。通过仿真表明,该原理区分度大,耐受过渡电阻能力强,并且对测距精度不敏感。因为线路越长,电压越高,输电线故障后潜供电流越大,所以该原理在特高压长线路上具有较强的实用价值。We proposed the self-adaptive reclosure with the Bergeron model for UHV long transmission lines. The relay can calculate the current of both sides of fault point using the Bergeron model before single-phase reclosure, and get the secondary arc current of fault point. Finally the relay can identify that the line has transient faults or permanent faults by the value of secondary arc current. Simulation results confirm that this principle has good identification ability, can endure great fault resistance, and is not sensitive to fault locating accuracy. Longer transmission lines requre higher voltage and the greater secondary arc current,so the principle has more practical value for UHV transmission lines.

关 键 词：自适应重合闸 贝瑞隆模型 故障识别 潜供电流 特高压线路 瞬时性故障 永久性故障 

分 类 号：TM762.2[电气工程—电力系统及自动化]