The invention relates to an online
monitoring system for high-
voltage cables, which comprises a sensor, a data collection unit, a power supply device, and a network
server. The sensor is arranged at the joint of a high-
voltage cable and is used for collecting data such as the shield
circulating current of the high-
voltage cable joint, the core current, the surface temperature of the cable, and the
ambient humidity and temperature and transmitting the data to the data collection unit. The data collection unit is arranged nearby the high-voltage cable joint and is used for collecting the data transmitted from the sensor and transmitting the date to the network
server via a
wireless network. The power supply device acquires power from the high-voltage cable and provides power to the data collection unit. The network
server is installed in a
control room and is used for receiving the data transmitted from the data collection unit in order to determine whether the
power cable is in
safe operation condition via special
data analysis, thereby serving the purpose of helping maintenance personnel monitor the operation condition of the
power cable at any time, and preventing the electrical faults from happening. In case that faults occur with the cable, the online
monitoring system can send alarms promptly and locate fault points, thereby providing assistance for cable repair.