Calculation of maximum power transfer capability between two interconnected areas by using Particle Swarm Optimization

Transferring large amount of power, from generations to end users, may reduce system stability margin. Therefore, the evaluation of maximum power transfer capability is required. This paper proposes the calculation of maximum power transfer capability which can satisfy N-1 contingency by re-dispatching the generation in load area, using Particle Swarm Optimization (PSO) method. The stability of system is specified by PQVSI (a stability index). The proposed method is tested on the 28 buses-southern transmission system of Thailand, and the result is promising.