Development of ESS Operating System for NTAs in Jeju Power System

This paper explores the development and implementation of an Energy Storage System (ESS) as a Non-Transmission Alternative (NTA) to address line overload and stability challenges in the Jeju power grid. The primary goal is to enhance grid reliability and efficiency without necessitating extensive expansion of transmission infrastructure, leveraging a 50MW ESS installed at the Geumak substation. The ESS NTA operating system is designed with three distinct operational modes: Mode 1 focuses on mitigating line overload, Mode 2 aims to control line utilization, and Mode 3 is based on renewable energy index-driven control. Each mode incorporates specific algorithms and control strategies, including calculations, control flow diagrams, and program development. Simulation and real-time application results validate the proposed system's effectiveness in reducing line overload, optimizing line utilization, and facilitating the integration of renewable energy.