Fast methods for direct assessment of power system transient stability

Augmentation of transient stability margin based on rapid assessment of rate of change of kinetic energy

“…According to the theoretical studies [2,[16][17][18] and experimental findings [14,15], the optimum moment of break insertion is achieved at the moment when RACKE just exceeds its maximum negative value. This instant represents the critical clearing time (t cc ) at which the break should be inserted.…”

“…In [14], a realtime assessment method of power system transient stability using rate of change of kinetic energy (RACKE) criterion was reported. Effectiveness of this method in transient stability assessment has also been previously investigated in [15][16][17][18], using computer simulation. When compared to other equivalent direct methods, RACKE requires less computation time since it does not need to evaluate the equilibrium point.…”

Implementation of a stability index for power system using energy balance criteria

“…Thus, over the last few decades a number of direct methods for assessing transient stability have been identified and investigated to identify this indicator. Under this category, lie a large number of methods some of them will be signified here, among them the system type transient energy function [3], the individual type energy function [4] and RACKE method [5].…”

“…Thus, over the last few decades a number of direct methods for assessing transient stability have been identified and investigated to identify this indicator. Under this category, lie a large number of methods some of them will be signified here, among them the system type transient energy function [3], the individual type energy function [4] and RACKE method [5].The above methods use the time-domain simulation as part of their solution. Except the RACKE method, they also use the concepts of the Transient Energy Function (TEF) method in analyzing the results generated by the time-domain simulation method to establish a stability margin and are called the hybrid methods.…”