This paper addresses a new method to design a PI-based load-frequency control (LFC) with communication delays. First the LFC problem is reduced to a static output feedback control synthesis for a multiple delays system, and then the controlparameters are easily carried out using robust H ∞ control technique. A 3-control area power system example is given toillustrate the proposed control methodology and the results are compared with the delay-less system-based H ∞ control design.
