Damping Inter Area Oscillations of Power Systems by a Fractional Order PID Controller

• Published in: 2009 International Conference on Energy and Environment Technology Vol. 2; pp. 103 - 106
• Main Authors: Yishu Zhao, Yang Gao, Zhijian Hu, Yongjun Yang, Jie Zhan, Yan Zhang
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-10-2009
• Subjects: Algorithm design and analysis; Control systems; Cost function; Damping; FOPID; GAPSO; Genetic algorithms; inter area oscillation; Particle swarm optimization; Power systems; Robust control; robustness; Three-term control; Uncertainty
• ISBN: 9780769538198; 0769538193
• DOI: 10.1109/ICEET.2009.262

A fractional order PID (FOPID) controller to damp inter area oscillations of power systems is studied. FOPID is a PID whose derivative and integral orders are fractional rather than integer. The difficulty of design a FOPID controller is how to determine the five key parameters of FOPID. This paper uses genetic algorithm particle swarm optimization (GAPSO) algorithm to design the FOPID controller. A new cost function is defined to facilitate the control strategies over the time domain specifications. Comparisons with a conventional PID controller are made and it is shown that the proposed FOPID controller can highly improve the system robustness with respect to model uncertainties.