Impact Assessment of LNG Combined Cycle Power Plant Installation in Korea Electric Power System

Abstract

With the new constraints such as political and environmental issues, the recent trends in Korea electric power system planning and operation has been changed. Especially, constructing new high-voltage AC transmission lines in Korea electric power system is avoided since not only environmental issues but also social acceptance problems.

This paper proposes pre-analysis of LNG combined cycle (C/C) power plant installation in metro area of Korea electric power system. Thus, this paper suggests three scenarios to examine the impacts of the LNG C/C installation in metro area. This paper analyzes its impacts by considering static analyses and economic evaluation. The static analyses include the power flow analysis, short-circuit analysis and power reserves in metro area of Korea electric power system which is one of the critical factors for stable operation due to its inherent characteristics. All the simulation results for static analyses are carried out by PSS/E. Moreover, the simplified economic evaluation with some assumptions are also investigated with respect to the cost of electricity by considering avoided cost and congestion cost.

 Keywords: LNG Combined-Cycle, Impact Assessment, Korea Electric Power System, Power Flow Analysis, Short-Circuit Analysis, Power Reserve, Cost of Electricity, Avoided Cost, Congestion Cost.