The paper aims to identify the development of power
interconnection network in the Greater Mekong Sub-region
(GMS) which is a part of the major energy infrastructure
mandated by ASEAN delegates in 1997. An overview of power
systems in the region is introduced. The combined load curve for
Vietnam and Thailand are formed to show the benefit of power
grid interconnection of GMS. The paper also concentrates on
simulation, analysis and evaluation of power transfer in 500kV
and 220kV interconnection transmission lines in GMS for the
planning horizon of 2010-2020. Reliability and environmental
benefits of the interconnection are discussed due to
interconnection. Based on the simulation results few
recommendations are given
