A comprehensive secondary substation monitoring system

This paper introduces a comprehensive monitoring system for urban MV/LV substations. The system has been specified by Helen Electricity Network Ltd, a subsidiary of Helsinki Energy. The pilot system has been developed by a group of companies specialized in SCADA, power system protection, and power quality issues. The system includes e.g. power quality measurements & database, disturbance recordings, fault location, transformer monitoring, and remote control of the MV switches at the substation. The paper reports the experience of the pilot project consisting of five secondary substations.