Robust Control for Power System Transient Stability

The complexity of power system transients as well as a wide range of operating regimes are beyond practical limitations of modeling techniques used in control design. Thus, in order to provide reliable system operation, a controller must be insensitive to modelling errors. A study of control design for transient stabilization of interconnected power systems is presented here as viewed by the power system engineer. The initial design phase is based on a simplified two machine equivalent model of the original multimachine Western North American Power System. Kharitonov polynomial approach is employed for the initial parameter tuning. This controller is next tested and "fine-tuned" on the 2nd order swing equation with time-varying parameters, numerically implemented using MAT-LAB. Final controller performance evaluation takes place in the original network using the power industry standard: Electro-Magnetical Transient Program.