a case study of Viet Nam Le Viet Hung creator Weerakorn Ongsakul Chairperson Surapong Chiraratananon Examination Committee Kumar, Sivanappan Examination Committee Electricity of Vietnam Scholarship donor text series technical report th Bangkok Asian Institute of Technology 2002 continuing eng 149 leaves : ill. Transmission system plays a very impo1tance role in electric system. Construction of new transmission facilities, such as lines or substations, requires long term planning and large capital investment. The main purpose of transmission system planning is to determine the locations and sizes of new transmission facilities in order to meet future demand in the economical and reliable manner. Therefore, careful study to evaluate the planning is required. This study identifies the concepts of power transfers on transmission line, stability considerations, applied to 500kV transmission expansion planning in Vietnam during 2002-2010. Analysis and evaluations of the transmission system with generation planning aim to satisfy the forecasted load demand under thermal limitation, voltage limitation and small signal stability limitation. The study also includes recommendations to improve the stability of 500kV system based on the results of analysis and evaluations. Power World software is used to simulate the existing and planned system. A thesis submitted in partial fulfillment of the requirements for the degree of master of Engineering.School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 2002 Electric power transmission Vietnam Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B07480 http://203.159.5.9/ait-thesis/detail.php?q=B07480 030808 20260817161216.0