Voltage Stability Control Based on Angular Indexes from Stationary Analysis

This paper presents a novel methodology for the calculation of angular indexes an electrical system from stationary analysis, using load flow and nose curves (P–V) in each buses to perform control actions preserve or improve voltage stability. The are proposed considering method based on concepts cutset angle (CA) center (COA). target is fast estimation voltage-stability margins through appropriate characterization whole bus with complete network N-1 contingency criteria. most significant enhancement that COA, which related dynamics system, indirectly reflects inertia respective angles generator rotor, as well impact equivalent-system model. Simulations showed COA important index determine location occurrence events. can also help aim where actions, like amount shedding, should be carried out remedy problems. assessed tested benchmark IEEE 39-bus system.