Power system emergency control against voltage collapse

The paramount objective of power system emergency control is to maintain the integrity of the interconnected transmission grid. Current automatic measures for dealing with power system emergencies respond to the symptoms and not the causes and dismember the grid rather than keeping it whole. There are fundamental deficiencies in existing approaches, such as emergency control from the apex of a hierarchy, the inability to provide for multiple contingencies and improper understanding of the process of breakdown. A direction for emergency control is charted by addressing these areas