Automation of distribution network based on GPRS communication

Slovenian distribution system operator, Elektro Primorska from Nova Gorica, started distribution grid automation back in 1997. by installation of remote control disconnector switches. Main goal of remote control disconnector switches is to insure in time protection and disconnection of power line feeders in case of a failure and quick power restoration in the distribution grid. Up today Elektro Primorska has installed over 80 Remote Controlled Disconnector Switches (RCDS) in its 20 kV distribution grid. Old UKV radio communication infrastructure that was used to integrate the RCDS into the SCADA/DMS system could not meet the modern SCADA system requirements and demands like real time data collection. Looking into a way to improve the data collection a new project was launched by the end of the 2010. The new project is based on using the existing GPRS/EDGE mobile communication network to integrate the existing RCDS into the SCADA/DMS. The paper describes the technical architecture and the functionality of the data acquisition system and characteristics of the communication protocols used. Based on the experience of such a system clear benefits to the DSO will be discussed.