Since market start the NEM has used a single and simple outcome metric for its reliability standard: “Unserved Energy” (USE). Essentially, we target an average of no more than 10.5 minutes off supply per customer per year from rotational load-shedding. In response to a Reliability Panel Review, the Australian Energy Council has published a report by Endgame Economics that theoretically contemplates the appropriateness of the existing standard in the transitioning power system and concludes that the existing simple USE output form approach remains the best approach for the future power system, just as it is in the current power system.
