Evaluation of the effects of photovoltaic systems on voltage quality

Because of the governmental incentives, the distributed photovoltaic systems are populating rapidly in Turkish Electric System. This work aims to evaluate the effects of those plants to the electrical system in terms of voltage quality by focusing on the specific example of the solar plant being built under the National Solar Power Plant Development Project (Milli Günes Enerjisi Santrali Gelistirilmesi Projesi, MILGES). In order to be able to evaluate the effects of the PV system under the most challenging situations in terms of power quality, it is assumed that the solar plant is connected to a substation that also supplies an iron and steel plant with an electric arc furnace (EAF). The EAF system is modeled based on the collected real field data, while PV system parameters are obtained from the project documents.