A Software Suite for Power System Stability Monitoring Based on Synchrophasor Measurements

A software suite—named Grid Stability Awareness System (GSAS)—has been developed to monitor and analyze power grid stability in real time using wide-area synchrophasor measurements. GSAS consists of five analytical and monitoring tools including an Oscillation Monitoring Tool, a Voltage Stability Monitoring Tool, a Transient Instability Monitoring Tool, an Angle Difference Monitoring Tool, and an Event Detection Tool. System architecture and functionalities of the tools are described. The alarming mechanisms implemented in GSAS are also presented. In addition, a series of off-line simulations were developed to test, evaluate, and validate the immediate suitability of the tools for use in an operational environment of a North American utility, and to identify and support potential improvements in the tools. The testing methodology and the procedures to create the simulation cases are also presented. Findings and conclusions are provided at the end of the chapter.