在配电网不停电负荷倒换过程中，进行合解环操作时形成的合环电流较大，会导致负荷转供失败，而且随着新能源的接入，负荷转供的情况也越来越复杂。为快速、高效进行配电网的负荷转供，提出了计及源荷不确定性的配电网负荷转供优化模型。首先，提出了度量传输元件耦合特性的计算方法，即传输阻抗式的电气距离方法，通过刻画元件之间的耦合程度达到降低合环电流的目标，形成电气距离约束条件。然后结合负荷转供的安全约束条件和开关总动作次数最少的目标函数分析分布了式发电（distributed generation，DG）和负荷的不确定性，获得合环电流机会约束，建立了计及源荷不确定性的负荷转供优化模型。最后对某地区配电网接线进行分析，验证了所提模型的可行性和有效性。

In the process of reversing the load of the distribution network, the loop current formed during the loop operation is large, resulting in the failure of the load transfer, and with the access of new energy, the load transfer is more and more complex. In order to quickly and efficiently conduct the load transfer of distribution network, a load transfer optimization model of source and load uncertainty is proposed. Firstly, the calculation method of measuring the coupling characteristics of the transmission element namely the transmission impedance electrical distance method is proposed. By describing the coupling degree between elements, the goal of reducing the loop current is achieved, forming an electrical distance constraint condition. Then, by integrating the safety constraints of load transfer and the objective function of minimizing the total number of switch operations, the uncertainties of distributed generation (DG) and load are analyzed to obtain the chance constraints of loop closing current, establishing an optimal load transfer model that accounts for the uncertainties of sources and loads. Finally,the wiring configuration of a regional distribution network is analyzed to verify the feasibility and effectiveness of the proposed model.