Power Systems Engineering Research Center

S-77G Project Summary 

Improving Voltage Stability Margin Estimation through the use of HEM and PMU Data

Summary Voltage stability security is best ensured by complementing some form of system simulation with real-time measurements. Both approaches have their strong and weak points. For example, system simulations are able to predict the effects on voltage stability margin of contingencies while real-time-measurement-based Thévenin equivalents are not hampered by any erroneous data that may be part of the system model. Thévenin equivalent approaches however work well on small systems but fail on large systems. The objective of this proposal is to develop a set of theoretically-based rules for developing and using Thévenin-based equivalent approaches for estimating voltage stability margin on large systems and then demonstrate the effectiveness of these techniques on larger systems or understand their limitations. We also propose to develop a set of nonlinear equivalents, establish their properties and determine their fitness for use in measurement-based voltage-stability assessment approaches.
Academic Team Members Project Leader: Daniel Tylavsky (Arizona State University, tylavsky@asu.edu)
Industry Team Members Di Shi, Zhiwei Wang, Jidong Chai, Xiaohu Zhang, Xi Chen, Zhe Yu, Wendong Zhu, Xinan Wang, Janet Zhang (GEIRI North America)
Project Period January 1, 2017 to December 31, 2018