Analysis of the Effects of HVDC Technology on Regional Power System Security: Impact of the MONITA HVDC Interconnection

Abstract

This paper provides an overview of High Voltage Direct Current (HVDC) technology, including its development, current status, key characteristics, limitations, and applications. It also presents power system security criteria, highlighting their importance for maintaining stability and reliable operation under all conditions. Special focus is given to the MONITA HVDC interconnection, examining its technical and operational features and evaluating its reliability under varying scenarios. The practical part of the study involves security analyses of the interconnection to assess its impact on the regional power system. Multiple operating conditions were considered, including normal operation, overload situations, and scenarios involving electricity import and export in the region. The objective of the research was to evaluate the behaviour of the MONITA HVDC interconnection under realistic operational conditions and its contribution to system stability and reliability. Detailed simulations were performed to assess its ability to maintain grid stability during sudden load variations, changes in power flows, and in cases of disconnections or failures of other network elements. The results demonstrate how the interconnection influences the regional power system’s operational security, identifying strengths and potential vulnerabilities. These findings provide valuable insights into the role of HVDC technology in enhancing the reliability and stability of modern power systems, and offer guidance for future planning, operation, and expansion of cross-border HVDC interconnections.