【摘要】 研究采用基于超级电容器的储能器来吸收城市轨道交通车辆的再生制动能量,并在适当的时候把能量回馈直流供电电网,以减少能源浪费,达到能量的高效利用。本文提出了模块化结构的储能器功率变换方案,采用多个模块串联以适应不同供电制式牵引电网的应用场合;采用多通道电路拓扑降低了变换器功率管的电流应力;提出一种双闭环控制策略,既实现了能量的双向流动又实现了串联模块的输入端电压的自然均压;提出了一套超级电容器组均压策略以保证超级电容器组高效可靠工作,主要分为组内均压和组间均压两组电路。最后通过小功率实验平台对该再生制动能量吸收系统的关键技术进行了实验验证。更多还原

【Abstract】 This paper presents an energy storage system based on ultra-capacitor to absorbing the regenerating energy of urban railway vehicles and releasing the energy when the train starts, which can cut down the energy waste. A modular power conversion scheme is proposed to accommodate the application of different electric supply system, where several modules are connected in series to endure high supply voltage. Multi-phase power conversion topology is adopted to share the high current, and a dual-loop control system is proposed to realize the bidirectional energy flow and achieve input voltage balance in series modules. A voltage balance scheme is also introduced to guarantee that the ultra-capacitor works reliably and efficiently, which consists of cells equalization in groups and voltage balancing between the groups. At last, a small scale prototype is build and the experimental results validate the feasibility of power conversion strategy.更多还原