Wide-Area Protection and Control: Present Status and Key Challenges

� Abstract— The electricity supply industries need tools for dealing with system-wide disturbances that often cause widespread blackouts in power system networks. When a major disturbance occurs, protection and control measures assume the greatest role to prevent further degradation of the system, restore the system to a normal state, and minimize the impact of the disturbance. Continuous technological development in communication and measurement have promoted the utilization of Phasor Measurement Unit (PMU) based Wide-Area Measurement Systems (WAMS) in power system protection and control for better management of the system security through advanced control and protection strategies. In this paper, a comprehensive survey is made on recent developments in this field. Focus of the survey is on WAMS based adaptive relaying and control applications and highlights key issues and challenges.

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