The Characteristic Ellipsoid Methodology and its Application in Power Systems

TitleThe Characteristic Ellipsoid Methodology and its Application in Power Systems
Publication TypeJournal Article
Year of Publication2012
AuthorsJian Ma, Yuri V Makarov, Ruisheng Diao, Pavel V Etingov, Jeffery E Dagle, Enrico De Tuglie
JournalIEEE Transactions on Power Systems
Pagination2206 - 2214
Date Published11/2012
KeywordsAA07-002, AARD, Automatic Switchable Network (ASN), phasor measurement units (PMUs), Power system dynamics, situational awareness

The characteristic ellipsoid (CELL) method to monitor dynamic behaviors of a power system is proposed. Multi-dimensional minimum-volume-enclosing characteristic ellipsoids are built using synchronized phasor measurements. System dynamic behaviors are identified by tracking the change rate of the CELL's characteristic indices. Decision tree techniques are used to link the CELL's characteristic indices and the system's dynamic behaviors and to determine types, locations and related information about the dynamic behaviors. The knowledge base of representative transient events is created by offline simulations based on the full Western Electric Coordinating Council (WECC) model. Two case studies demonstrate that the CELL method combined with the decision trees can detect transient events and their features with good accuracy.

Short TitleIEEE Trans. Power Syst.