A GENERALIZED SHELL FOR DYNAMIC SECURITY ANALYSIS IN OPERATIONS PLANNING

This paper introduces the concept of a generalized shell for performin g power-system dynamic security analysis. The generalized shell mechan izes routines traditionally carried out by human experts and that are essential to power-system dynamic security analysis, thereby greatly a ccelerating the realization of complex processes. The shell semantics express high-level goals and tasks using a friendly, highly compact sy ntax which closely matches the language of operations planners. Typica lly, the shell will execute appropriate load-flow and transient-stabil ity simulations (i.e. using commercially available simulation software ), perform result analysis, make input changes and repeat this process until a user-defined goal has been achieved. A working shell prototyp e for performing key algorithmic processes is described and results of a typical sensivity study are presented using a 700-bus model of the Hydro-Quebec network. It is expected that the prototype will reduce st udy-cycle time, improve the accuracy of dynamic security limits and, i ndeed, transform the working environment of operations and system plan ners. Eventually, it can be foreseen that the approach will gravitate towards supporting on-line dynamic security analysis.