Monitoring voltage collapse margin with synchrophasors across transmission corridors with multiple lines and multiple contingencies

TL;DR

This paper presents a method using synchrophasor data to monitor voltage collapse margins across complex transmission corridors with multiple lines and contingencies, aiding operators in voltage stability assessment.

Contribution

It introduces a novel reduction technique to combine measurements from multiple lines and contingencies into a single equivalent for real-time voltage stability monitoring.

Findings

Method effectively captures multiple contingencies effects.

Can accommodate generator reactive power limits.

Provides operator awareness of voltage stability risks.

Abstract

We use synchrophasor measurements of the complex voltage and current at both ends of multiple transmission lines that connect areas of a power system to monitor the online voltage collapse margin. A new reduction is used to reduce the multiple transmission lines to a single line equivalent and determine how to combine the synchrophasor measurements. Generator reactive power limits can be accommodated. The results show that this methodology can capture the effect of multiple contingencies inside the transmission corridors, giving awareness to the operators about the severity of contingencies with respect to voltage stability.