Modeling and performance assessment of the Thai national power grid considering wind farms integration

This paper covers the integration of wind power plants with National Thailand Power Grid which includes the impact the power systems. The modeled Thai Power System in PSAT consists of 118 buses, 32 power plants (thermal, hydro, and combined cycle power plant), 139 lines, and 88 loads. The 230 kV and 500 kV of voltage levels have been considered in the model with 100 MVA as based for power flow analysis. This paper also develops and study whole power system of Thailand and interconnection with other neighboring countries e.g., Laos PDR, which seems to be not available in any paper so far. According to Power Development Plan (PDP) and Alternative Energy Development Plan (AEDP) of Thailand which aim to increase renewable energy production, especially wind and solar energy in the future, an existing wind power plant for 6.9 MW and for probably power capacity of 150 MW have been analyzed. The impact to national grid and compatibility with standards of fault ride through capability has been checked by using different type of wind turbines. This praxis has been also repeated for the existing full scaled frequency inverted doubly fed induction generators (DFIGs) and fixed speed wind turbines.