Underground and overhead monitoring systems for MV distribution networks

Abstract

The focus on enhancing the reliability and efficiency of the power grid has led to the implementation of the Smart Grid concept. This concept is based on the deployment of automation, namely advanced distribution automation (ADA) applications, and control technologies relying on the availability of parameters such as voltage, current, temperature etc. acquired from certain nodes of the grid. For a long period of time, the monitoring of the overhead distribution network has known to have a continuous evolution and the line-type stand-alone intelligent sensors, commercially available at this time, are the proof of that. While monitoring such parameters may be typically available in overhead distribution locations, it is not the same in underground distribution locations. Measuring in utility vaults or pad mounted cabinets is not as critical as in cable chambers/manholes, due to the accessibility provided by equipment such as transformers, switches etc. Recently, new developments in sensor, intelligent electronic devices and communication technologies have opened the door to attractive alternatives for monitoring the underground distribution network in general and in cable chambers/manholes in particular. An example of such a monitoring system is presented in this study.