Equal area criterion for power system stability

What is equal area criterion?

Equal Area Criterion Definition: The equal area criterion is a graphical method to determine the transient stability of a single or two-machine system against an infinite bus. Transient Stability: This criterion helps in understanding if a power system can maintain synchronism after a large disturbance.

What is equal area criterion (EAC)?

As one of the most interesting direct methods, the Equal Area Criterion (EAC) was proposed in the 1930s and 1940s to assess the transient stability of the classical model of a SMIB system in a simple and comprehensive way without a formal solution to the system equations [ 2, 3, 4 ].

What is extended equal-area criterion?

Xue, Y.; Pavella, M. Extended equal-area criterion: An analytical ultra-fast method for transient stability assessment and preventive control of power systems. Int. J. Electrical Power Energy Syst. 1989, 11, 131–149. [ Google Scholar] [ CrossRef]

What is the stability region of a power system?

In the case of power systems with simple-machine models, the characterization of this region has been discussed theoretically in the literature. The stability region consists of surfaces passing through the unstable equilibrium points (u.e.p's) of (9.5).

What is the equivalence of energy function to the equal-area criterion?

The equivalence of the energy function to the equal-area criterion has been shown for the single-machine case. For the multimachine case, the PEBS and the BCU have been ex-plained in detail. The TEF method can be used to act as a lter to screen out contingencies in a dynamic security assessment framework .

What is extended equal area criterion (EEAC)?

The idea of Extended Equal Area Criterion (EEAC) was proposed in the late 1980s. It relies on the observation that in loss of synchronism in a multi-machine power system, there is a separation between generators into two groups. The critical group with increasing rotor angles, and the non-critical group of remaining generators.