1. Voltage stability condition in a power transmission system calculated by sensitivity methods;Flatabo;IEEE Trans.,1990
2. Direct detection of voltage collapse conditions;Alvarado,1989
3. A posturing strategy against voltage instabilities in electric power systems;Tiranuchit;IEEE Trans.,1988
4. Research agenda for power systems monitoring and control: voltage-related problems;Ilic,1990
5. Methods for determining proximity to voltage collapse;Schlueter;IEEE Trans.,1991