PUYKHAMMEE, V. and Thongphanh, P. 2026. Optimizing Water Pressure Control using Proportional-Integral-Derivative (PID) Controller via Variable Frequency Drive (VFD). Souphanouvong University Journal Multidisciplinary Research and Development . 12, 03 (Jul. 2026), 57–65. DOI:https://doi.org/10.69692/SUJMRD120357.