Improved monitoring and control of distribution network by smart MV/LV substations

This paper reports the key features and practical experience gained so far of a unique distribution network monitoring and control system. Intelligent components and communication equipment at MV/LV substations have enabled extension of SCADA and DMS systems from HV/MV substations down to LV level. The functionality includes e.g. power quality monitoring, control of MV switches, and MV fault indication. Putting various functions together, the system is a real example of changing the grid smarter and providing tools for network asset management. Practical examples and experience of the system are reported in the paper.