Lifecycle Collaborative Planning for Traction Power Supply Systems With Integrated Energy Access

As global energy transition and electrified transportation continue to advance, traction power supply systems (TPSS) are becoming increasingly vital in rail transit. To solve problems that traditional planning for TPSS often overlooks the integrated energy access and the collaborative optimization of economic security throughout the life cycle, a lifecycle economic-security collaborative planning (LE-SCP) model for TPSS with integrated energy access (IEA-TPSS) is proposed. This model integrates an equipment performance correction matrix (EPCM) to address the performance degradation over the lifecycle of equipment. In addition, it considers <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${N} -1$ </tex-math></inline-formula> security to ensure the resilience of IEA-TPSS under contingent conditions. Furthermore, a scenario-based hierarchical decomposition (SHD) method is introduced to solve this model. A case study analysis using actual data was conducted to validate the LE-SCP model and SHD method. The simulation results show that the LE-SCP model and the SHD method effectively address the comprehensive lifecycle planning issues of IEA-TPSS, considering both equipment degradation and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${N} -1$ </tex-math></inline-formula> security. Moreover, compared to traditional solution algorithms, the proposed SHD method can effectively reduce the model-solving time by 8.61%.