Techno Economy Comparison of Conventional Generating Unit and Lithium Battery Energy Storage as a Primary Frequency Regulation of Variable Renewable Energy Penetrated Grid System, Case Study: Southern Sulawesi of Indonesia. Eur. j., eng. sci., tech. [Internet]. 2021 Dec. 20 [cited 2025 Nov. 5];4(3):25-38. Available from: https://dpublication.com/journal/EJEST/article/view/739