Different Convergence Strategies for Power Flow Stability Enhancement in Difficult Nonconvergent Cases: A Simulation-Based Study

Power grid planning relies heavily on accurate power flow calculations, making the achievement of convergent power flow conditions crucial for various system analysis tasks. This paper addresses the critical need for achieving convergent power flow conditions in power grid planning, essential for accurate system analysis. Using a PSS/E node-breaker model, we tackle the challenge of nonconvergence in power flow computations by analyzing key control parameters and proposing effective strategies. These developments are integral to the EPOPE (Étude de la Planification Opérationnelle Prévisionnelle par Écoulement de Puissance) tool, currently under development by Hydro-Québec. EPOPE transforms how electrical system operators handle forecast data by automating integration and adaptation in power flow studies. This automation significantly enhances operational efficiency and accuracy by eliminating manual labor, simplifications, and the need for corrections. The tool represents a significant advancement in optimizing workflow and ensuring reliable decision-making in power system management. Our findings offer valuable insights for both academia and industry professionals seeking to deepen their understanding of convergence issues in power flow. By implementing these strategies, power system engineers can enhance the reliability and performance of power grids, ensuring their performance in the face of nonconvergence scenarios.