About This Metric
The impact of a TADS event on BPS reliability is called the (Transmission Outage Severity) TOS of the event, which is defined by the number of outages in the event and by the type and voltage class of transmission elements involved in the event. The metric is calculated for transmission outage events that involve sustained outages of 100 kV and above ac circuits and transformers. TADS events are categorized by initiating cause codes (ICC). These ICCs facilitate the study of cause-effect relationships between each event’s ICC and event severity.
Metric Definition DocumentM-17 Transmission Outage Severity
