An Optimal Trade-off between Monitoring and Simulation for Voltage Dip Characterization of Transmission Systems

This paper presents a method to estimate the dip performance at non-monitored buses of a large transmission system based on limited monitoring and stochastic assessment of voltage dips. By finding fault positions likely to cause the residual voltages seen at some buses through power quality meters and adjusting the stochastic assessment around triggered monitors, the dip performance at non-monitored buses can be estimated. The paper also presents the application of an optimal monitoring program to guarantee that the entire network is covered by the set of monitors. The algorithms for practical implementation are presented and tested in an 87-bus system showing the applicability of the proposed method