Power quality performances of Enexis grids – an overview

Abstract

Despite the high quality of supply of the Enexis Networks, a small part of our customers experiences voltage quality related problems, resulting in approximately one thousand complaints per year ( In the last two decades customers use more power electronic based devices and more new loads such as electric cars and heat pumps that are being connected to the grid. Customers have also become more aware of the voltage quality of the supply and its possible (negative) impacts on their household apparatus. Therefore, nowadays customers complain more frequently to their network operators when they face any type of inconvenience of the supplied electricity service. In the Enexis service areas, yearly around 650 complaining customer’s point of connections (POC) are monitored to check the supply voltage quality. If the measured voltage parameters violate the standard limits of the EN50160 and the Dutch Gridcode, an appropriate measure is taken to restore the voltage quality at the POC. In this paper, an overview of the previous three years power quality monitoring (PQM) results of Enexis grids are discussed. Furthermore, the national level PQM activities are highlighted briefly.