电动汽车与光伏发电系统大规模接入配电网使其内部的单相电源增加，负荷加重，加剧了单相运行问题。为保证电网供电质量，大量可调节单、三相补偿调节设备在电网中得到应用，因此对三相不平衡配电网最优潮流展开研究。对配电网三相不平衡条件下的最优潮流进行求解分析，建立了以有功损耗最小为优化目标的多时段配电网最优潮流模型。通过二阶锥规划将非凸非线性最优潮流模型变换为线性模型，在不损失精确度的情况下，降低求解难度，提高了求解效率。采用Pyomo建模工具以及Gurobi算法包对所建模型求解，并分析了潮流误差，验证了该方法的可行性与有效性。

The large-scale connection of electric vehicles and photovoltaic power generation system to the distribution network increases the single-phase power supply and load, which aggravates the single-phase operation problem. In order to ensure the power supply quality of the power grid, a large number of adjustable single-phase and three-phase compensation regulation devices are used in the power grid, so the optimal power flow of three-phase unbalanced distribution network is studied. The optimal power flow of distribution network under the condition of three-phase unbalance is solved and analyzed, and the optimal power flow model of multi-period distribution network is established with the optimization objective of minimizing the active power loss. The non-convex nonlinear optimal power flow model is transformed into a linear model by second-order cone programming, which reduces the difficulty of solving and improves the efficiency of solving without loss of accuracy. Pyomo modeling tool and Gurobi algorithm package are used to solve the model, and the power flow error is analyzed, which verifies the feasibility and effectiveness of the method.