高频通道干扰引起的载波电路故障案例分析  

Case Study on Carrier Circuit Malfunction From High Frequency Channel Interference

作　　者：尤汉龙 尤文珺 黄刚[1] 芮小峰[1] 

机构地区：[1]常州供电公司,江苏常州213003 [2]西交利物浦大学,江苏苏州215123

出　　处：《电力信息与通信技术》2014年第1期55-59,共5页Electric Power Information and Communication Technology

摘　　要：近年来,高频通道干扰引起的载波电路故障时有发生。就干扰产生的来源、干扰特征、干扰传播途径3个方面对载波电路故障案例进行比较分析,阐述了处理高频通道衰耗过大的检修流程、要点及注意事项;探讨了新建或改造线路投运初期及雷雨天气时,易受电晕放电干扰,引发载波电路频繁告警或故障的主要原因;从2种载波机的高频电缆采用不同接线方式发生故障机率不同的角度出发,提出了降低接触电阻、有效控制放电管残压、降低载波机功放损坏机率的方法。Recently, carrier circuit malfunction resulting from high frequency channel interference happens occasionally. This paper analyzes the cases of carrier circuit malfunction from three aspects of interference sources, interference characteristics and interference propagation paths, and describes the maintenance process, key points and notes for dealing with large high frequency channel attenuation. Further this paper discusses the main reasons that restllting in frequent alarms or lhults of carrier circuits, and finds that the new or upgraded transmission lines are easy to be impacted by corona discharge interference when in preliminary operation stage or in the circumstance of thunderstorm. From the view of distinct probabilities of malfunction of two types of carrier by applying different high frequency cable connection methods, a feasible approach aiming to reducing carrier power amplifier damage probability is proposed. The advantages of this approach are to effectively control the residual voltage of the discharge tubes and reduce the damage probability of carrier power amplifiers.

关 键 词：载波电路 高频通道衰耗 电晕放电干扰 放电管残压 功放损坏 

分 类 号：TM726[电气工程—电力系统及自动化]