2012 : A COMPARISON OF RESCHEDULING METHODS OF ACTIVE POWER GENERATION WITH REGARD TO STEADY STATE STABILITY LIMIT

Prof. Dr. Ontoseno Penangsang Ir. M.Sc.


Abstract

This paper discussed an active power generator scheduling in order to increase the limit level of steady state systems especially in the peak load condition. Some power generator optimization methods such as those of Langrange, Genetic Algorithm (GA), NN-GA, Merit Order, and the proposed Z-Thevenin-based were studied and compared in respect of their steady state aspects. A method proposed in this paper was a developed one based on the Thevenin equivalent impedance values between each load respected to each generator. These impedance values represented the point-to-point electric distance between a specific load and a related generator. Power generators with the closest impedance to the load were operated at the maximum level, followed by other generators. In this research, REI-Dimo was used to determine the steady state stability limit (SSSL). The steady state stability index values obtained through the various generator scheduling methods have been compared with the proposed method. As a study case, this research reviewed the 500kV-Jawa-Bali interconnection system. The simulation results showed that the proposed method required the highest operational cost; however, it had the highest limit level of steady state stability compared to other optimization techniques. Thus, the proposed method could be used to create the steady state stability limit of the system especially in the peak load condition.