AN EFFICIENT ALGORITHM FOR CONTINGENCY RANKING BASED ON REACTIVE COMPENSATION INDEX

Kaanan Nithiyananthan - Neelamegam Manoharan - Velimuthu Ramachandran

   This paper describes a methodology for line outage ranking based on reactive compensation index (RCI). RCI has been used extensively at BC Hydro, Burby, Canada for assessing the voltage stability. A methodology has been developed to evaluate quickly RCI using the π section model for active power flow and compensation injection theorem, RCI is specifically calculated, using only the results of base case load flow, under each line outage condition. RCI approximates the distance between pre-contingency nose and line outage case nose by the total reactive injection required at the load buses to establish similar voltage levels for the two cases. Hence RCI has been used as severity index for ranking the line outages. Ranking results have been obtained for a sample test system and compared with those obtained using Performance Index method.

Keywords: voltage stability; proximity indicators; ranking

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