Development of the EDP's Power Quality monitoring programme

Portuguese power systems are achieving very high supply reliability levels, with a sustainable reduction of the number and duration of voltage interruptions during the last decade. In this framework, Power Quality is assuming more and more importance on the Quality of Service and customers requirements. Aware of these trends, EDP Distribuição has been developing an ambitious Power Quality monitoring programme in order to overcome the associated challenges. This paper describes the evolution of the adopted methodology, a description of the Power Quality monitoring platform and the main challenges in its future expansion. Some results are also presented corresponding to Power Quality monitoring carried out in HV/MV substations and MV/LV secondary substations.