Abstract
Voltage instability has been given much attention by power system researchers and planners in recent years, and is being regarded as one of the major sources of power system insecurity. Maintaining a stable and secure operation of a power system is therefore a very important and challenging issue. A steady state analysis is applied to study the voltage collapse problem. The Modal Analysis method is used to investigate the stability of the power system. Prediction of the stability margin or distance to voltage collapse is based on the reactive power load demand. The load is connected to several selected buses. The analysis is performed for IEEE 14 Bus system. Then, the most critical mode is identified for each system. After that, the weakest bus, which contributes the most to the critical mode, are identified using the participation factor. The remedial measure is proposed to prevent the voltage collapse. SVC is used to improve the voltage profile of the system. The voltage profile obtained after the incorporation of the SVC is compared with the same before the incorporation of the SVC and the improvement is verified.
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