AP Sensing Monitors Important Power Cable Link in South Korea

The Buk-Dangjin to Godeok underground power cable link supplies electricity in South Korea from the Dangjin power plant to Godeok, Pyeongtaek city and throughout the Seoul Metropolitan area. It is considered crucial in developing South Korea's transmission network to meet the country's rapid growth in energy demand. AP Sensing's Distributed Acoustic Sensing (DAS) technology was recently deployed by Korean Electric Power Corporation (KEPCO) to monitor the power cable link. 

The asset is a 500 kV HVDC transmission line, approximately 35 km long. The underground power cable is installed with a burial depth varying from approximately 2 to 6 m in a special duct configuration.

Due to the importance of the asset and high risk of damage posed by road construction activities along the transmission line, KEPCO decided to deploy AP Sensing's DAS to monitor the asset and receive alerts in case of Third Party Interference (TPI) activities. The project was led by GS E&C and supported by our partner, AP Technologies in South Korea. 


The monitoring system in this project consists of a one channel N5200A DAS instrument with a measurement range of 50 km. The DAS system is configured in order to monitor the transmission line in real time, visualize acoustic energy over time / distance in waterfall plots, and store the measured data on an external data storage unit. AP Sensing's SmartVision monitoring software is also installed on the main server, which is mounted in the DAS cabinet. A SmartVision client version is also installed on another PC, which is used to visualize the asset and the DAS alarms in Buk-Dangjin substation.

In SmartVision, the MapView is implemented for visualization of the power cable route based on the corresponding GPS coordinates. 

AP Sensing's DAS system first passed a pre-qualification round based on a variety of different road construction activities, such as drilling, breaking, and collecting. After qualification of the DAS system, commissioning was conducted by mapping the sensing fiber to the asset, adjusting the acoustic zone values, and defining the alarm parameters.

To the satisfacton of the client, AP Sensing's DAS has successfully been monitoring this important infrastructure since commissioning. 

Read the full case study here.

Find out more about AP Sensing's Power Cable Monitoring solution here.