- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
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| Citation: | WANG Wei, HUANG Xiaohong, GUO Kai, QIN Ken, LI Qunzhan, LIU Bingrui, LUAN Xiaoyong. Energy Storage-Based Co-Phase Power Supply System Considering Photovoltaic Integration and Its Cooperative Control Strategy[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20250192
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To promote energy conservation and emission reduction, as well as green and low-carbon development of electrified railways, two technical schemes for a photovoltaic-integrated energy storage-based co-phase power supply system were first proposed. Then, the operating conditions of the system were analyzed, and the negative sequence compensation principle was formulated. On this basis, according to the photovoltaic power generation output and lithium battery state of charge (SOC), a two-layer cooperative control strategy was constructed with the control objectives of achieving load peak shaving and valley filling and efficient energy utilization. The upper layer was responsible for energy management and negative sequence control, while the lower layer controlled the converter operation in real time. Finally, through case analysis, the curtailment of photovoltaic generation, charging and discharging, and negative sequence compensation were controlled under comprehensive consideration of multi-dimensional factors, such as load magnitude under traction and regeneration conditions, solar irradiance, and lithium battery charging and discharging. The results indicate that the system exhibits good adaptability and stability under different operating conditions, and the correctness and effectiveness of the proposed control strategy are verified. The photovoltaic integration scheme eliminates 50% of electrical phase separations, realizes controllable negative sequence, promotes multi-energy integration and complementarity, facilitates local and nearby consumption of photovoltaics, and mitigates severe fluctuations of traction load.
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