Panpean, Chakrit, Pokpong Prakobkaew, Chaiyut Sumpavakup, Sanpoom Songtrai, Napat Watjanatepin, Krittapas Chaiyaphun, and jeerawan homjan. 2026. “Improving the PQ Harmonic Detection Method for Active Power Filters in Single-Phase Power Systems”. ECTI Transactions on Electrical Engineering, Electronics, and Communications 24 (1). https://doi.org/10.37936/ecti-eec.2026241.261151.