Time series model of background voltage for hosting capacity calculations

Assessing the influence of the medium voltage (MV) network on multiple low-voltage (LV) networks in hosting capacity studies becomes important with a large share of PVs. This paper introduces the concept of background voltage to describe the impact of varying production and consumption on hosting capacity studies. A time-series model for the background voltage is presented, which considers such effects. The background voltage model has two components: the voltage drop due to consumption and the voltage rise due to PVs in other LV networks. Both components impact the hosting capacity for LV networks. Different forms of modelling these components were used to assess their impact. Using time-series for both the voltage drop and rise gives a good representation of the voltage behaviour throughout the year, creating a realistic scenario, so that different solutions can be compared towards increasing hosting capacity.