The paper proposes a new power flow model and calculation procedure for large-scale multi-phase (unbalanced) distribution networks with simultaneous phase interruptions. Differently from traditional linear models for calculations of networks with simultaneous short-circuits and phase interruptions, phase interruptions are treated in this paper much more realistically—as outages which are incorporated in a nonlinear phase-domain distribution power flow model. Using the compensation method, this model is decoupled per phases. The calculation of the energized part of the network is carried out using a backward–forward sweep (BFS)-based procedure. The calculation of the state of the deenergized part of the network, which appeared due to phase interruptions, is based on the linear loop current method. Thus, the efficiency of BFS is retained in the proposed procedure. The robustness and efficiency of the proposed procedure are demonstrated by calculating both a small test network and a real-life large-scale network.

提出了一种同时相间中断的大型多相（不平衡）配电网潮流模型和计算程序。与用于计算具有同时短路和相间中断的网络的传统线性模型不同，本文将相间中断的处理更为实际，因为故障已纳入非线性相域配电潮流模型中。使用补偿方法，该模型按相位解耦。网络的通电部分的计算是使用基于前向后向扫描（BFS）的过程进行的。由于相位中断而出现的网络断电部分的状态的计算基于线性环路电流方法。因此，建议的程序保留了BFS的效率。通过计算小型测试网络和现实生活中的大规模网络，证明了所提出程序的鲁棒性和效率。