Abstract
The interconnection of power grid brings significant economic benefits, while it calls for higher requirements to the security, stability and economic operation of power system as well. With high dimensionality of its optimization problem, the whole network centralized optimal power flow (OPF) algorithm is computational inefficient. Therefore, on the basis of power grid layering and zoning, the distributed optimal power flow calculation method in interconnected power grid with multiple control centers has important realistic significance. A distributed optimization algorithm of interconnected power grid transmission congestion management is proposed in this paper. The active power constraints of inter-area transmission interfaces are considered to satisfy the trade power constraints between adjacent sub-systems. The coordination and cooperation procedure counts on the correction and updating of boundary bus equivalent injection power and voltage vector. The numerical results on IEEE test systems show that the algorithm for transmission congestion has good convergence ability.
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