Abstract:
Electrical demand tends to increase according to the economic growth along the years. The adequacy of the generation system is a major factor for long-term development of the country. To ensure adequacy of the generation system, generation expansion planning should comply with the future demand taking into account operating cost and availability of each power plant. In addition, it is hard to receive long-term demand forecast with high accuracy. Hence, the uncertainty of the forecasted demand must be considered. Consequently, it will lead to appropriate generation expansion planning, resulting in acceptable reliability with flexibility and appropriate investment level for handling with unexpected event occurred in the future. This thesis presents the generation system planning with consideration of load forecast uncertainty and energy limited units based on specified reliability indices.The developed computer program has been tested with a modified generation system of Thailand considering energy limitation in power plants i.e. hydro power and pumped storage. The test result leads to comments and suggestion in improving the development of the power development plan for the country.