Forward-Backward Sweep Method for Three-Phase Unbalanced Distribution Network Power Flow Calculation

This presentation describes a power flow calculation method for three-phase unbalanced distribution networks using the Forward-Backward Sweep Method, applicable to nodes under various conditions. The method employs a matrix decomposition approach to solve linear equation systems numerically. Widely adopted in power system analysis, this algorithm efficiently handles large-scale linear equations while accommodating unbalanced loads and asymmetric network configurations to deliver accurate computational results. Key implementation aspects include: - Forward sweep: Calculating branch currents from end nodes to the root node using Kirchhoff's Current Law - Backward sweep: Updating node voltages from the root to end nodes following voltage drop calculations - Iterative process: Repeating sweeps until voltage convergence criteria are met - Phase handling: Separate processing of three-phase components with mutual impedance considerations The method's computational efficiency makes it particularly valuable for distribution system design and analysis, where it can model realistic network imbalances through appropriate matrix formulations and convergence control mechanisms.