Pum, V., Audomsi, S., Areeyat , C., Luo, J. and Chaiduangsri, N. (2025) “Optimization-Based Tuning of a Cascaded PDN–PI Controller for Frequency Regulation in Solar PV–Powered Thermal Systems”, Engineering Access. Mahasakham, Thailand, 12(1), pp. 160–173. available at: https://ph02.tci-thaijo.org/index.php/mijet/article/view/260775 (accessed: 29 September 2026).