International Journal of Innovative Research in Electrical, Electronics, Instrumentation and Control Engineering (IJIREEICE)
In this paper, the authors describe sensitivity indicator method to identify weakest bus of the system. It also describes method of calculating the amount of reactive power to be injected at the load bus to avert the voltage instability as the load on the load bus increases. In this paper, IEEE-57 BUS system has been considered. First, the weakest bus is identified using sensitivity indicator method. Then Load flow analysis is performed using the Newton-Raphson (N-R) method. When load flow doesn't converge after the demand has increased on a bus then it indicates that it requires reactive power compensation on that bus.