Influence of Croatian Motorways electrical networks on distributive networks

Abstract

The implementation of the plan of the Government of the Republic of Croatia on the accelerated construction of motorways is simultaneously accompanied by the construction of new or reconstruction of existing power facilities (transformer stations) and associated lines. In this regard, over 200 transformer stations and over 1000 kilometers of cable and overhead lines of various voltage levels have been built or reconstructed so far. The 20 kV voltage level is dominant, and the transformations 110/20 kV, 35/20 (10) kV and 20 (10)/0.4 kV are applied. The associated 20 kV lines are mainly cable lines, consisting of single-core cables with cross-linked polyethylene insulation. Since these are significant lengths of cable lines, their capacitive character is significantly expressed. The electrical networks of Croatian Motorways are incorporated into the domicile distribution networks of the Croatian Electric Power Company and become their integral part. This paper provides a brief overview of the constructed electrical network of the Croatian Motorways and its integration into the electricity system of the Republic of Croatia. The paper examines in more detail the impact of the cable network built for the power supply of the Sveti Rok Tunnel on the local distribution networks.

Slavko Vujević

Professor Emeritus

An expert in electrical engineering, particularly known for his contributions to numerical modeling of electromagnetic phenomena, lightning protection, and grounding. Throughout his career, he was a key member of the Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture in Split, where he taught, mentored students, and actively participated in scientific research and international professional organizations.

Rino Lucić

Full Professor

Dr. sc. Rino Lucić is a retired professor from the Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture in Split. Throughout his career, he taught courses at all study levels and actively participated in the realization of numerous scientific-research projects. As an author or co-author, he has published 41 scientific papers and 16 professional articles, with research interests spanning numerical modeling, transmission lines, finite element method, and power system transient analysis.