A New Generation of Modular Multilevel Converters Integrating Energy Storage Devices for Dual-Voltage Railways

适用于双电压铁路的新一代集成储能器件的模块化多电平变流器

• 批准号: EP/L023261/1
• 负责人: Pietro Tricoli
• 金额: $ 12.57万
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2014
• 资助国家: 英国
• 起止时间: 2014 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FL023261%2F1
• 关键词: New; Generation; Modular; Multilevel; Converters

Historically, supply voltages of traction systems were developed independently in different parts of the UK and in different countries. This led to the proliferation of several types of railway electrification systems, either DC or AC. Nowadays the permissible range of voltages of traction systems are set out in the standard BS EN 50163. Due to the high capital costs involved, it is unlikely that a single standard railway electrification system will be adopted in the near future. The large range of voltages and the AC and DC supply require that services operated across more than one electrification system are operated by rolling stock equipped by dual-voltage traction drives. Since the formation of the European Union and the subsequent increase in the amount of cross border traffic, new needs for multi-voltage trains have arisen.Traditional traction converters have a DC bus and provide three-phase power for the traction motors. The DC bus voltage is usually the same of the DC power line and, hence, traction converters are directly connected to the DC supply. For AC supply, the direct connection is not possible and an additional AC/DC four quadrant converter is needed. Moreover, a fault in one of the switches affects the functionality of the whole traction converter. When energy storage devices are used, the voltage level of the DC bus requires necessarily the connection in series of the storage cells and, hence, the presence of balancing circuits and balancing control.Traction converters for dual-voltage trains would benefit significantly by the introduction of new topologies with "universal" input voltages, because the AC/DC four quadrant converter could be removed. Modular multilevel converters present this characteristic and can be designed for a wide range of input and output voltages. Their topology is intrinsically fault-tolerant and the replacement cost of one module is significantly lower than that of the whole converter. Each module has an accessible DC link that gives the possibility of the integration of the storage elements without their direct series connection. Thus there is now a critical opportunity to develop a dual-voltage traction system with modular multilevel converters and integrated storage devices.A major technical hurdle for the widespread application of dual-voltage trains with integrated storage devices is that the controllers of the converter have to be properly modelled and characterised if to be used for traction applications. The research group at the University of Birmingham will take the timely step of investigating for the first time how a modular multilevel converter with integrated storage devices can improve the performance of dual-voltage trains to benefit the connections between different electrification systems in the UK and the rest of Europe. A novel controller, based on extensive modelling of the converter, will be created to obtain optimal torque performance for the full range of the output frequency. A kW-range demonstrator with a modular multilevel converter and supercapacitors will be designed and constructed. The experimental results will give us confidence in applying the design methodology for future designs of large-scale dual-voltage converters. The research outcomes will deliver specific recommendations to train manufacturers for complementing traditional traction drives with flexible and modular solutions.

从历史上看，牵引系统的供电电压是在英国不同地区和不同国家独立开发的。这导致了几种类型的铁路电气化系统的扩散，无论是直流还是交流。目前，牵引系统的电压允许范围在标准BS EN 50163中规定。由于涉及高昂的资本成本，在不久的将来不太可能采用单一标准的铁路电气化系统。大范围的电压以及AC和DC电源要求在多个电气化系统上运行的服务由配备双电压牵引驱动器的机车车辆运行。随着欧盟的形成以及随后的跨境交通量的增加，对多电压列车的新需求出现了。传统的牵引变流器具有直流母线，为牵引电机提供三相电源。DC总线电压通常与DC电力线的电压相同，因此，牵引转换器直接连接到DC电源。对于交流电源，直接连接是不可能的，并且需要额外的AC/DC四象限转换器。此外，其中一个开关中的故障影响整个牵引转换器的功能。当使用能量存储装置时，直流母线的电压水平需要串联的存储单元，因此需要平衡电路和平衡控制。双电压列车的牵引变换器将通过引入具有“通用”输入电压的新拓扑而显著受益，因为AC/DC四象限变换器可以被移除。模块化多电平变换器具有这种特性，可以设计用于宽范围的输入和输出电压。它们的拓扑结构具有固有的容错性，一个模块的更换成本明显低于整个转换器的更换成本。每个模块都有一个可访问的DC链路，该链路可以集成存储元件，而无需直接串联连接。因此，开发具有模块化多电平变流器和集成储能装置的双电压牵引系统是一个关键的机遇。集成储能装置的双电压列车广泛应用的一个主要技术障碍是变流器的控制器必须正确建模和表征，才能用于牵引应用。伯明翰大学的研究小组将及时采取措施，首次调查具有集成存储设备的模块化多电平转换器如何提高双电压列车的性能，以促进英国和欧洲其他地区不同电气化系统之间的连接。一种新的控制器，广泛的建模转换器的基础上，将创建获得最佳的转矩性能的输出频率的全范围。将设计和建造一个具有模块化多电平转换器和超级电容器的千瓦级演示器。实验结果将给我们信心，在未来的大规模双电压转换器的设计应用的设计方法。研究成果将为列车制造商提供具体建议，以灵活和模块化的解决方案补充传统的牵引驱动器。

项目成果

A new state of charge control of modular multilevel converters with supercapacitors for traction drives

用于牵引驱动的具有超级电容器的模块化多电平转换器的新充电状态控制

• DOI: 10.1109/ecce.2015.7310179
• 发表时间: 2015
• 作者: Mukherjee N

A state-of-charge equalisation technique of super-capacitor energy storage systems using sub-module dc-dc converter control within modular multilevel converter (MMC) for high speed traction drive applications

超级电容器储能系统的充电状态均衡技术，在模块化多电平转换器 (MMC) 内使用子模块 DC-DC 转换器控制，用于高速牵引驱动应用

• DOI: 10.1109/upec.2015.7339948
• 发表时间: 2015
• 作者: Mukherjee N

Low frequency operation of Modular Multilevel Converters with embedded battery cells for traction drives

用于牵引驱动的带有嵌入式电池的模块化多电平转换器的低频操作

• DOI: 10.1109/speedam.2016.7525982
• 发表时间: 2016
• 作者: D'Arco S

Design and Control of Modular Multilevel Converters for Battery Electric Vehicles

• DOI: 10.1109/tpel.2015.2408435
• 发表时间: 2016
• 期刊: IEEE Transactions on Power Electronics
• 影响因子: 6.7
• 作者: M. Quraan;Tae-Jung Yeo;P. Tricoli

Modular multilevel converter based supercapacitor integration strategies and their comparative evaluation for railway traction drive systems

基于模块化多电平变流器的铁路牵引驱动系统超级电容器集成策略及其比较评估

• DOI: 10.1109/epe.2015.7309217
• 发表时间: 2015
• 作者: Mukherjee N