Modelling and identification of single area power system for load frequency control

Abstract

In a large scale interconnected power system, the frequency and tie line power fluctuates when the sudden changes in load occurs. Therefore, in order to regulate this fluctuation in a desired manner a suitable control scheme namely load frequency control is required. But the model of this interconnected single area power system is very complex therefore it is difficult to develop a required control strategy. Thus, in this paper, modelling and identification of single area power system has been presented via model order reduction. In order to maintain the stability in reduced system a stability preservation method namely stability equation methods has been employed. The obtained results are compared when higher and reduced systems are subjected to unit step and impulse inputs. Furthermore, the performance of the proposed reduced model has also been evaluated in frequency domain.