Performance analysis of a new synchrophasor based real time voltage stability monitoring (RT-VSM) tool

With the ongoing smart electric grid development, several algorithms and tools have been developed that make use of synchrophasor data for online wide area voltage stability monitoring. Most of these algorithms have several advantages, but at the same time also have limitations. For wide area real time monitoring, there is a need for faster and accurate online voltage stability algorithm. This paper discusses briefly about requirements for online voltage stability monitoring and limitations of few existing approaches. A new algorithm has been presented using a hybrid approach that is not dependent on time series PMU data and at the same time not fully relying on system models. This algorithm has been used to develop the Real Time Voltage Stability Monitoring (RT-VSM) tool to enable system operators in a control center to monitor the wide area voltage stability of a power system. The focus of this paper is investigating the computational performance of the developed algorithm in offline and online environment using simulation platform. Results obtained using the RTVSM tool are presented for different IEEE test cases.