Co-Phase Traction Power Supply and Energy Storage Technology for Electrified Railway
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摘要: 为进一步优化电气化铁路牵引变电所经济节能运行，提出了一种电气化铁路同相储能技术研究方案. 该方案基于运行图和历史数据，以负荷削峰为控制目标，实时控制储能装置充放电，治理以负序为主的电能质量问题；同时，降低系统对设备容量要求，节省运行费用，并能有效利用列车再生制动能量. 以京沪高铁实测数据分析了同相储能供电系统解决负序的有效性，并以飞轮作为储能装置进行了仿真分析和试验验证，最后分析了同相储能供电系统的经济性能. 研究结果表明：同相储能供电技术可取消50%电分相环节，治理负序的效果由储能装置功率决定，当储能装置功率为牵引负荷功率95%概率大值的10%时，可降低负序限值10%.Abstract: In order to further optimize the economical and energy-efficient operation of electrified railway traction substations, a new scheme integrated with co-phase traction power supply and energy storage technology is proposed. Based on train diagrams and historical data, and with the intent of load peak clipping, it can achieve the real-time control on the charging or discharging of energy storage devices. As a result, the power quality problems mainly due to negative sequence can be solved. Meanwhile, the equipment capacity and operation costs are less demanded, and the regenerative braking energy can be utilized effectively. By means of the measured data of the Beijing－Shanghai high-speed railway, the proposed method shows the capability of improving negative sequence. The simulation analysis and experimental verification are performed through the flywheel energy storage device. Finally, its economic performance is also analyzed. The results show that the integration of co-phase traction power supply and energy storage can eliminate the neutral sections by 50%, and the function of eliminating negative sequence depends on the power of the energy storage device. When the energy storage device power is 10% of the large value of 95% probability for traction load power, the negative sequence limit can be reduced by 10%.
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图 1 同相储能供电系统构成
Figure 1. Configurations of co-phase power supply systems with energy storage technology
图 4 负载不同工况下削峰填谷仿真
Figure 4. Simulation of peak load shifting under different operation conditions
图 5 飞轮直流侧电压和电流仿真波形
Figure 5. Simulation waveforms of current and voltage for DC side of flywheel
图 6 变流器交流侧电压电流仿真波形
Figure 6. Simulation waveforms of current and voltage for AC side of converter
图 8 飞轮储能同相供电系统消峰填谷试验波形
Figure 8. Test waveforms of peak load shifting for co-phase power supply systems with flywheel energy storage
图 9 飞轮功率与直流侧电压波形
Figure 9. Test waveforms of real-time power and DC side voltage of flywheel
图 10 飞轮交流侧电压电流波形
Figure 10. Test waveforms of current and voltage for AC side of flywheel
图 11 削峰填谷前后最大需量曲线
Figure 11. Curves of maximum demand before and after peak load shifting
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