Decentralized coordinated secondary voltage control of multi-area highly interconnected power grids

In this paper, a decentralized method based on simulated annealing approach is proposed in a decentralized way for coordinated secondary voltage control problem of highly interconnected multi-area power networks. The algorithm finds the best possible pilot buses and corresponding control simultaneously, in each area, to compensate for voltage contingencies. The tie-line active and reactive powers transferred between two areas are measured at the borders of each area and the effect of neighbor areas will be considered as variable loads at mutual buses of tie-line. Comparison of the proposed decentralized method with the centralized case shows the effectiveness of the proposed algorithm.