Recent updates in the Swedish regulation on voltage quality

This article outlines the voltage characteristics that the Swedish Energy Markets Inspectorate (Ei) monitors according to the Swedish regulation on requirements that must be met for the distribution of electricity to be of good quality. The revised regulation entered into force in January 2024. It consists of two parts, continuity of supply and voltage quality. This article focusses on voltage quality. This article describes the value or range for every voltage characteristic at respective voltage level. The article also give s a comparison to the previous regulation and explains, when relevant, why the changes were made. Additionally, it describes a new voltage characteristic in the regulation and the reason behind introducing it.