ECONOMICAL GENERATION RESERVE IN ISOLATED POWER SYSTEMS

ABSTRACT

This paper presents a new technique to determine the economical generation reserve for isolated power systems. The reserve is classified as short-term and long-term. For planning short-term power reserve to determine the required load shedding for avoiding blackout for severe emergency conditions, the dynamic behavior of the system after generating unit outages is performed, and the resulting frequency decay is analyzed. Therefore, the economical short-term reserve is determined to minimize the summation costs for reserve provision, plus the equivalent cost of the required load shedding.

For planning of long-term reserve, the utility investments and other decisions factors that affect electric service reliability should be explicitly evaluated, on the basis of their cost and benefit implications. A cost benefit approach, that quantifies the power reserve benefit in terms of the reduction in unserved energy cost, enables the evaluation of generation capacity additions.

To determine the economic short-term and long-term generation reserve, these approaches have been applied to areal regional utility

Keywords:

• Economic power reserve
• spinning reserve
• load shedding
• power system reliability
• power system dynamics.