Title :
A simple computation and visualization of voltage stability power margins in real-time
Author :
Glavic, Mevludin ; Lelic, Muhidin ; Novosel, Damir ; Heredia, Eric ; Kosterev, Dmitry
Author_Institution :
Quanta Technol. LLC, Raleigh, NC, USA
Abstract :
This paper introduces a simple method to monitor power system voltage stability conditions in real-time. The method is based on the concept of Voltage Instability Predictor (VIP). The essence of the method is a simple computation of a voltage stability boundary based on VIP derived quantities. The stability boundary is assumed as a parabolic equation in the P-Q plane identified using measurements collected at a specific substation, transmission path, or load center. The computed stability boundary is further visualized in a P-Q plane, together with a point representing the current operating conditions, and generally re-computed as soon as the new set of measurements is collected (preferably at high rates using phasor measurement units). Simplicity and easy interpretation of the results brings this method as a useful tool to increase system operator situational awareness. Supporting results are provided using relatively big test system (52 bus Nordic test system) and a real-life system (a portion of the North-West USA system).
Keywords :
parabolic equations; phasor measurement; power system stability; substations; 52 bus Nordic test system; North-West USA system; P-Q plane; VIP concept; VIP derived quantities; load center; parabolic equation; phasor measurement; power system voltage stability condition monitoring; real-life system; relatively big test system; substation; system operator situational awareness; transmission path; voltage instability predictor concept; voltage stability boundary computation; voltage stability power margin visualization; Current measurement; Monitoring; Power system stability; Reactive power; Stability criteria; Voltage measurement; Phasor measurements; Power margins; Visualization; Voltage stability monitoring and detection;
Conference_Titel :
Transmission and Distribution Conference and Exposition (T&D), 2012 IEEE PES
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-1934-8
Electronic_ISBN :
2160-8555
DOI :
10.1109/TDC.2012.6281498