New limits for voltage quality in LV networks and the costs and time necessary for meeting them

The paper presents the results of a three-year measurement of voltage quality (VQ) carried out at a selected sample of 80 LV distribution networks in all regions of the Czech Republic, both from the point of view of the valid standard EN 50160:2007 [1] and with regard to its proposed changes [2] elaborated based on the requirements of ERGEG [3]. The paper also deals with possible consequences for DNOs relating to compensations to customers for VQ acc. to ERO Decree [4] and, with the costs for reconstruction of all LV networks, in which some parts do not fulfil the valid EN 50160 and its proposed changes. The voltage quality in LV networks was monitored both in the MV/LV transformer station and in the middle (approximately) and at the end of the chosen feeder.