Assessment of voltage stability risks under intermittent renewable generation

Abstract

A quantitative framework is presented for assessment of voltage stability risks in power networks with intermittent renewable generation. The framework first identifies the critical surfaces which comprise a continuum of critical points for voltage stability at each bus. Then, a risk probability is computed for the entire system based on a given joint probability distribution of demand which takes into account variability due to intermittent renewable generation. Finally, the voltage stability risk is calculated using the potential financial cost of a voltage collapse event based on the official figures published by the Australian Energy Market Operator. The framework is illustrated with the..