To realize energy conservation and emission reduction of railways, as well as alleviate the contradiction between supply and demand of energy, a hybrid traction power supply system integrated with photovoltaic sources (HTPSS-PVSs) is proposed. HTPSS-PVS can achieve the on-site access and consumption of photovoltaic (PV) sources along the railway line, without affecting the original structure of the traction power supply system (TPSS). Considering the strong stochastic volatility of traction loads and PV sources, the adaptability of HTPSS-PVS is analyzed to fully reveal the dynamic interaction mechanism among different subsystems, particularly in port electrical quantity and power quality. The quantitative evaluation methods of different power quality indices are also introduced after PV access. Afterward, the joint simulation and experimental investigation of the whole system are carried out. The results not only demonstrate the feasibility of the proposed scheme but also point out that this coupling system has good adaptability. Compared with other schemes, it can be easily applied to the majority of conventional ac-fed two-phase TPSSs already operated or under construction due to their lower investment cost and shorter construction cycle. Finally, the relevant application suggestions are given to better match different tradeoff indicators and operation modes of the system.

中文翻译：

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交流供电铁路光伏电源混合牵引供电系统实验研究及适应性分析


为实现铁路节能减排，缓解能源供需矛盾，提出一种光伏电源混合牵引供电系统（HTPSS-PVS）。 HTPSS-PVS可以实现铁路沿线光伏电源的就地接入和消纳，而不影响牵引供电系统（TPSS）原有结构。考虑到牵引负荷和光伏电源的强随机波动性，对HTPSS-PVS的适应性进行了分析，以充分揭示不同子系统之间的动态相互作用机制，特别是在港口电量和电能质量方面。还介绍了光伏接入后不同电能质量指标的量化评价方法。随后，对整个系统进行了联合仿真和实验研究。结果不仅证明了该方案的可行性，而且表明该耦合系统具有良好的适应性。与其他方案相比，该方案投资成本较低，建设周期较短，可以很容易地应用于大多数已运行或在建的传统交流两相TPSS。最后给出了相关的应用建议，以更好地匹配系统的不同权衡指标和运行模式。