PQ Decomposition Method for Power Flow Calculation in IEEE 14-Bus and 30-Bus Systems

The PQ decomposition method is a MATLAB program designed for power flow calculation in IEEE 14-bus and 30-bus power systems. This method represents a widely-used power system analysis technique that classifies network nodes into P-nodes (active power nodes) and Q-nodes (reactive power nodes) to accurately compute voltage magnitudes and power distributions throughout the electrical network. In this MATLAB implementation, the PQ decomposition method employs an iterative algorithm that decouples active and reactive power equations, utilizing Jacobian matrix simplification for efficient computation. The program processes bus admittance matrices, performs power mismatch calculations, and implements convergence checks to determine optimal power flow solutions. This approach enables comprehensive analysis of power system operational conditions, providing valuable insights for grid stability assessment and system planning. The code structure includes modular functions for data input, matrix operations, and result visualization, making it suitable for both educational and research applications in power system engineering.