A Study on the Evaluation of System Voltage Stability in the Local Renewable Management System

The increasing integration of renewable energy poses a significant threat to the voltage stability of regional power systems, such as in the Gwangju-Jeonnam province. This paper proposes a dynamic voltage stability assessment methodology applicable within a Local Renewable Management System (LRMS). The proposed methodology periodically calculates the ’maximum renewable energy hosting capacity’ by integrating real-time grid data and conducting contingency-based simulations using DSA(Dynamic Security Assessment) Tools. A case study using actual data from the Gwangju-Jeonnam grid successfully identified the potential risk of voltage collapse on a day without renewable energy curtailment and quantified the stable hosting limit. This study demonstrates that the proposed methodology can provide grid operators with a quantitative tool for proactive decision-making, contributing to the stable operation of the power grid while maximizing the utilization of renewable energy.