Real-Time Voltage Stability Analysis for IROL Assessment

This chapter introduces Peak RC’s experience, in collaboration with vendor and impacted operating entities, on implementation of a Real-Time Voltage Stability Analysis (RT-VSA) tool in the control rooms to calculate the Interconnection Reliability Operating Limits (IROLs) across the Western Interconnection (WI). Major technical challenges and technical resolutions, including modeling aspects, software improvements, validation approaches, and integration efforts, are presented in detail. A number of RT-VSA case studies and some lessons learned are reviewed in the chapter. Key findings and several recommendations for future work are summarized in the end.