Robust topology determination based on additional substation data from IEDs

This paper describes an approach for more robust power system topology determination using additional substation data currently not available through Supervisory Control and Data Acquisition (SCADA). This new approach uses additional data from multiple Intelligent Electronic Devices (IED) located in substations. The additional data relates to the same measurements as taken by Remote Terminal Units (RTU) as well as the measurements not "seen" by RTUs at all. By utilizing redundant data, performing time correlation between analog and contact data, and examining the historical data, the proposed approach significantly increases accuracy of topology determination and makes the outcome reliable under multiple measurement contingencies.