Forward-Backward Sweep Algorithm for Three-Phase Unbalanced Power Flow in IEEE 33-Bus System (PQ Nodes Only)

This MATLAB implementation employs the forward-backward sweep algorithm to solve three-phase unbalanced power flow problems in the IEEE 33-bus system, which contains exclusively PQ nodes. The code leverages MATLAB's computational capabilities to generate immediate results upon execution. Users can modify and extend this base program to accommodate additional requirements and application scenarios. The algorithm effectively handles three-phase unbalanced power flow calculations in the IEEE 33-bus system, providing reliable computational tools for power system stability analysis. The implementation features iterative voltage updates and power flow calculations through distribution network branches. Key computational functions include nodal voltage magnitude calculations, phase angle determinations, and line power flow computations. Through this algorithm, users can rapidly obtain critical parameters including nodal voltages and line power flows, enabling comprehensive analysis and optimization of power system operational conditions. Beyond applications specific to the IEEE 33-bus system, this algorithm can be adapted to other similar power systems with appropriate adjustments and improvements. The implementation demonstrates high flexibility and scalability through its modular structure, allowing parameter modifications and method extensions to meet diverse user requirements. The code structure supports easy integration of additional features such as different load types, transformer models, and contingency analysis capabilities.