Tuning of output feedback UPFC controller parameters using Imperialist Competitive Algorithm

In this paper a method for the design of output feedback controller for unified power flow controller (UPFC) to damp low frequency oscillations in a weakly connected system is investigated. The selection of output feedback gains for the UPFC controller is converted to an optimization problem with the Multi objective function which is solved by an imperialist competitive algorithm (ICA) that has a strong ability to find the most optimistic results. The effectiveness and validity of the proposed controller on damping low frequency oscillations is tested through eigenvalue analysis and time domain simulation under three loading conditions and input mechanical torque disturbances. For comparison purposes, a LQR controller is designed. The simulation results carried out by MATLAB/SIMULINK software show that the tuned ICA based output feedback controller has an excellent capability in damping low frequency oscillations and enhance greatly the dynamic stability of the power systems.

کلیدواژه ها:

UPFC ، low frequency oscillation damping ، ICA