Abstract：The optimal power flow model of the active distribution network is non-convex, so it is difficult to ensure the global optimality and reliable convergence of the optimization results. Therefore, convex relaxation is needed to ensure that the model can be solved reliably. This paper proposes a second- order cone programming convex relaxation model which considers distributed generator, on-load voltage regulators with different connection modes, AC-DC converters, and three-phase models . Compared with the convex relaxation of Distflow model, this paper considers the effect of coupling phase-to-phase, and gives the physical characteristics of distributed generator, on-load tap-changer voltage regulators and other components. The second-order cone programming solver is used to solve the problem, and the calculation accuracy under different conditions and the calculation efficiency of different solvers are compared and analyzed. Numerical experiments based on the IEEE 13 bus system and IEEE 123 bus system show that the current optimization results can meet the constraints of power flow, which can be used as the final results for controlling. The results can also provide a good initial value for the nonconvex optimization solvers to get the solution of global optimization faster.
巨云涛, 黄炎, 张若思. 基于二阶锥规划凸松弛的三相交直流混合主动配电网最优潮流[J]. 电工技术学报, 2021, 36(9): 1866-1875.
Ju Yuntao, Huang Yan, Zhang Ruosi. Optimal Power Flow of Three-Phase Hybrid AC-DC in Active Distribution Network Based on Second Order Cone Programming. Transactions of China Electrotechnical Society, 2021, 36(9): 1866-1875.
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2021, Vol. 36 
