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摘要
The frequent occurrence of the extreme events has led to major outages in recent years. It is critical that the restoration process of the transmission and distribution networks should be coordinated and optimized at this time to improve the restoration speed and reduce the costs. However, the transmission and distribution networks belong to different operators between which the information exchange is limited. In order to the achieve coordinated operation of these two networks during the load recovery phase, a fully parallel distributed optimization method is proposed. A transmission and distribution network restoration operation model is established to minimize the restoration costs, introducing the fuzzy theory and the credibility theory to transform the deterministic constraints into the fuzzy chance constraints considering the uncertainties. The analytical target cascading method is used to realize the decomposition and coordination optimization of the transmission and distribution network restoration subproblems. On this basis, a diagonal quadratic approximation is applied to relax the penalty function of the consistency constraint of the coupling variables, solving the subproblems in a fully parallel manner and improving the computational efficiency of each iteration. The effectiveness, convergence, and computational efficiency of the proposed method are verified using a transmission and distribution system consisting in an IEEE 30-bus transmission grid and an IEEE 33-bus distribution grid as an example. ? 2023 Power System Technology Press.
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