Ma Chao-Tsung, Tian Yi-Hung
Department of Electrical Engineering, CEECS, National United University, Miaoli 36063, Taiwan.
Micromachines (Basel). 2020 Dec 12;11(12):1099. doi: 10.3390/mi11121099.
An energy storage system using secondary batteries combined with advanced power control schemes is considered the key technology for the sustainable development of renewable energy-based power generation and smart micro-grids. The performance of energy storage systems in practical application mainly depends on their power conditioning systems. This paper proposes a silicon carbide-based multifunctional power conditioning system for the vanadium redox flow battery. The proposed system is a two-stage circuit topology, including a three-phase grid-tie inverter that can perform four-quadrant control of active and reactive power and a bi-directional multi-channel direct current converter that is responsible for the fast charging and discharging control of the battery. To achieve the design objectives, i.e., high reliability, high efficiency, and high operational flexibility, silicon carbide-based switching devices, and advanced digital control schemes are used in the construction of a power conditioning system for the vanadium redox flow battery. This paper first describes the proposed system topologies and controller configurations and the design methods of controllers for each converter in detail, and then results from both simulation analyses and experimental tests on a 5 kVA hardware prototype are presented to verify the feasibility and effectiveness of the proposed system and the designed controllers.
一种采用二次电池并结合先进功率控制方案的储能系统，被视为基于可再生能源的发电和智能微电网可持续发展的关键技术。储能系统在实际应用中的性能主要取决于其功率调节系统。本文提出了一种用于钒氧化还原液流电池的基于碳化硅的多功能功率调节系统。所提出的系统采用两级电路拓扑结构，包括一个能够对有功功率和无功功率进行四象限控制的三相并网逆变器，以及一个负责电池快速充放电控制的双向多通道直流变换器。为了实现高可靠性、高效率和高运行灵活性等设计目标，在构建钒氧化还原液流电池功率调节系统时采用了基于碳化硅的开关器件和先进的数字控制方案。本文首先详细描述了所提出的系统拓扑结构和控制器配置以及每个变换器的控制器设计方法，然后给出了在一个5 kVA硬件原型上进行的仿真分析和实验测试结果，以验证所提出系统和所设计控制器的可行性和有效性。
