Summary

The accelerating integration of photovoltaic power plants (PVPP) into distribution networks is reshaping power system dynamics. This rapid, mainly uncoordinated growth increases output variability, operational uncertainty, and reserve capacity needs. The aim of this paper is to quantify the impact of PVPP dispersion and capacity distribution on short-term output variability in distribution networks, based on a real data set from 97 PVPP within the Power

Utility Elektroprivreda of Bosnia and Herzegovina system. The dataset covers six distribution system operator regions and six primary substations across approximately 20,048 km2, reflecting different PVPP penetration patterns. A one-year 15-minute resolution data set was analyzed in per-unit terms, with standard deviation as the primary variability indicator. The results further demonstrate that geographical dispersion is a key factor not only in reducing short-term variability but also in determining operational costs, as significantly higher balancing costs are observed in geographically limited areas with high penetration of large unitcapacity PV plants, whereas more dispersed configurations exhibit substantially lower balancing requirements.

Additional informations

Publication type Session Materials
Reference C6_11745_2026
Publication year
Publisher CIGRE
Country Bosnia and Herzegovina
Study committees
File size 1 MB
Price for non member 30 €
Price for member 30 €

Authors

MERZIĆ Ajla - CIGRE Bosnia and Herzegovina; HASANSPAHIĆ Nedžad - JP Elektroprivreda BiH, Bosnia and Herzegovina; TURKOVIĆ Nedim - JP Elektroprivreda BiH, Bosnia and Herzegovina

Keywords

Balancing costs, decentralization, distribution networks, flexibility, geographic dispersion

Impact of Photovoltaic Power Plant Topology and Geographical Dispersion on Output Variability in Distribution Networks – a Case Study