Application of neural-network based variable fractional order PID controllers for load frequency control in isolated microgridsBelikov, Juri; Nosrati, Komeil; Škiparev, Vjatšeslav; Tepljakov, Aleksei; Petlenkov, Eduard; Levron, YoashPower system frequency control : modeling and advances. 1st Ed2023 / p. 203–216 : ill https://www.elsevier.com/books/power-system-frequency-control/mishra/978-0-443-18426-0