- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | YANG Jianwei, FENG Suhua, GUO Huibin, LIAO Kai, XIANG Yueping. Optimal Configuration of Photovoltaic and Hybrid Energy Storage System Capacity in Multi-Substation Interconnected Traction Power Supply System[J].Journal of Southwest Jiaotong University, 2025, 60(6): 1537-1549.doi:10.3969/j.issn.0258-2724.20240028
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With the continuous expansion of China’s electrified railways, the integration of photovoltaic (PV) and hybrid energy storage systems (HESS) into the traction power supply system (TPSS) has gradually become an effective approach to achieve energy conservation and emission reduction in electrified railways. In order to ensure the stable and economical operation of multi-substation interconnected TPSS, the optimal configuration method of PV and HESS capacity based on a techno-economic evaluation system was proposed. By analyzing the operation characteristics of traction load and the charging and discharging characteristics of mixed energy storage media, the operation conditions of the system were divided, and the energy management strategy considering energy conservation and three-phase voltage imbalance was given by controlling the power allocation under different conditions. On the basis of comprehensively considering the boundaries of stable operation and economic benefits of the system, the technical and economic effects of the system operation were quantitatively evaluated with the net benefit throughout the full life cycle, energy utilization rate, and negative-sequence capacity as optimization objectives. Furthermore, a two-layer optimization model for PV and HESS capacity configuration based on the proposed energy management strategy was established, and the parameters of the capacity optimization layer were iteratively modified according to the daily operation effect of the energy management layer. China’s high-speed railway was taken as an example for analysis. Simulation results have shown that the proposed method can effectively realize the optimal configuration of PV and HESS in multiple interconnected substations, where the total cost is reduced by 21.18%; the energy utilization rate is up to 74.61%, and the three-phase voltage unbalance meets the upper limit of 2% in the national standard.
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