Utilization of PMU data to evaluate the effectiveness of voltage stability boundary and indices

Intelligent and effective monitoring of power system stability in control centers is one of the key issues in smart grid technology to prevent unwanted power system blackouts. Voltage stability contingency analysis is one of the important monitoring tools for control center operation in smart grid era. With the advent of Phasor Measurement Unit (PMU) technology, real time monitoring of voltage stability of power system is now a reality. This work utilizes real-time PMU data to derive voltage stability boundary and indices to monitor the voltage stability related contingency situation in power systems. It uses PMU data to calculate two voltage stability indices that indicates relative closeness to the instability by producing numerical indices. The IEEE 39 bus system was modeled and run on a Real-time Digital Simulator (RTDS) which streamed PMU data over the Internet using IEEE C37.118 standard and was used to calculate the voltage stability boundaries and indices in real-time.