Abstract:
Voltage stability problem are now receiving special attention in power system operation because of a greater need for improving efficiency of usage of transmission capacity. This thesis proposes the bus and transmission line voltage collapse analysis approach, based on P-Q curve, for monitoring weak buses and transmission lines which may result in the voltage collapse. Before the voltage collapse will occur, an operating team is able to protect or fix the power system. The bus voltage collapse analysis approach can be sorted into 2 types, i.e. reference and generator bus type and load bus type. The load bus type is analyzed by using the bus voltage collapse coefficient. For the transmission line voltage collapse analysis approach, it is analyzed by using the line voltage collapse coefficient as well, but both of the voltage collapse coefficient calculations are absolutely different. In addition to the voltage collapse analysis approaches, the optimum installed capacitor in power system is also proposed. The proposed approaches are tested with the 9 bus and 14 bus test system.