A stochastic based voltage collapse indicator

The voltage collapse of a power system is analyzed as the result of the eventual push of the system operating point beyond the boundary of voltage security due to random fluctuations in the system load characteristics. The effect of different fluctuation intensity levels at load buses on the eventual voltage collapse of a power system is studied with the help of a stochastic based voltage collapse indicator. It is shown that this indicator, will provide further insights into the power system´s vulnerability due to the high degree of uncertainty that exists in present day voltage collapse load models