Abstract:
Due to the ever increasing demand for power, economic and environmental constraints that limit the expansion and restructuring transmission networks, the transmission lines are prone to be operated under heavily stress conditions, and power systems to operate near critical limits.
This thesis investigates different scenarios to improve the power transfer capability of (Atbara-Portsudan) transmission line as one of the national grid problems. This line was selected depending on line indices such as Fast Voltage Stability Index (FVSI), Line Stability Index (Lmn). Simulation was carried out using NEPLAN software, based on data given from National Load Dispatch Center (NLDC) in Sudan. National grid was studied in peak and off-peak cases, to clearly represent the problem. All the results presented in comparison form to find the best scenario. Power transfer capability of (Atbara-Portsudan) could be enhancing up to 150% of existing load by using TCSC beside SVC installed in Portsudan. However the ultimate solution is double-circuit transmission line beside local generation station.
