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A Modified Lyapunov Exponent based Approach for Real-Time Voltage Stability Assessment Using PMUs

Real-time voltage stability assessment is a key requisite in modern power networks equipped with renewable distributed generation sources and complex loads. Synchrophasor technology has become a prominent WAMS technology and has gained increasing popularity due to limitations in conventional SCADA systems. This study discusses the end to end process of real-time voltage stability assessment by using a PMU network. Evaluation of largest Lyapunov exponent is identified as an efficient method of determining the real-time stability by performing several dynamic test cases.