MV/LV substations — Solutions to improve the technical quality of service

The Technical Quality of Service has been a constant concern in EDP Distribuicão. Between 2008 and 2010 the Portuguese Distribution System Operator (DSO) carried out significant efforts to improve the index that measures the quality of service in Portugal, the Average Interruption Time (AIT). Currently the focus is on reducing certain asymmetries that still persist between different areas. In this context the need to carry out extensive works in secondary substations (MV/LV) has arisen. Taking into account the need for quick and less expensive solutions to the problems encountered in those secondary substations, several solutions were designed, aiming for a strong impact on results and simultaneously a quick implementation.