中压载波通信是利用10 kV中压配电线路作为传输通道的一种通信方式，已广泛应用于配电自动化、用电信息采集领域。一体化电容耦合器是中压载波通信系统稳定、可靠运行的保障，但受电压等级制约，在10 kV配电线路不断电情况下缺少有效方法判断耦合器是否出现故障。文中提出了一种基于信号线端口阻抗的一体化电容耦合器在线故障判断方法，利改进的中压载波通信机采集信号线端口阻抗，可在10 kV配电线路不断电的情况下，在线判断一体化电容耦合器是否故障，方法简单可靠，节省人力物力浪费，具有一定的工程实际价值。
Medium voltage carrier communication is a communication mode using 10 kV medium voltage distribution line as transmission channel, which has been widely used in the field of distribution automation and electricity information acquisition. Integrated capacitive coupler is the guarantee for stable and reliable operation of medium voltage carrier communication system. However, limited by voltage level, there is no effective method to judge whether the coupler fails when the 10 kV distribution line is constantly on. This paper puts forward a based on the integration capacitor coupler port impedance line on-line fault judgment method, the improvement of middle pressure carrier communication machine to collect signal port impedance, can in 10 kv distribution line continuous electric power, judge whether the integration capacitor coupler faults online, method is simple, reliable, save manpower material resources waste, has certain practical value.
