A MODELING AND CONTROL FRAMEWORK FOR OPERATING LARGE-SCALE ELECTRIC-POWER SYSTEMS UNDER PRESENT AND NEWLY EVOLVING COMPETITIVE INDUSTRY STRUCTURES

This paper introduces a systematic, structure-based modeling framework for analysis and control of electric power systems for processes evol ving over the mid-term and long-term time horizons. Much simpler model s than the detailed dynamics specifically for control design at differ ent hierarchical levels are obtained by applying both temporal and spa tial separation. These simple models, or the aggregate models, represe nt the net effect of interactions among interconnected regions on spec ific hierarchical levels. They are exact, since no assumptions on weak interconnections among the subsystems are made. Moreover they are eas ily understood in terms of power flows among the regions. The approach is essential for improving present performance of the system. It is a lso potentially useful in a competitive utility environment in which i t is critical to study the interplay between technical and economic pr ocesses.