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Coordinated control of three-phase AC and DC type EV-ESSs for efficient hybrid microgrid operations

机译：三相AC和DC型EV-ESS的协调控制，可实现高效的混合微电网运行

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This paper presents a three-layered coordinated control to incorporate three-phase (3P) alternating current (AC) and direct current (DC) type electric vehicle energy storage systems (EV-ESSs) for improved hybrid AC/DC microgrid operations. The, first layer of the algorithm ensures DC subgrid management by regulating the DC bus voltage and DC side power management. The second and third layer manages AC subgrid by regulating the AC bus voltage and the frequency by managing reactive and active power respectively. The multi-layered coordination is embedded into the microgrid central controller (MGCC) which controls the interlinking controller in between AC and DC microgrid and the interfacing controllers of the participating electric vehicles (EVs) and distributed generation (DG) units. The whole system is designed in MATLAB/SIMULINK environment resembling the under construction microgrid at Griffith University, Australia. Extensive case studies are performed using real life irradiation data and commercial loads of the campus buildings. Impacts of homogeneous and heterogeneous single-phase EV charging are investigated to observe both balanced and unbalanced scenarios. Synchronization during the transition from the islanded to grid-tied mode is tested considering a contingency situation. From the comparative simulation results it is evident that the proposed controller exhibits effective, reliable and robust performance for all the cases. (C) 2016 Elsevier Ltd. All rights reserved.
机译：本文提出了一种三层协调控制，将三相（3P）交流电（AC）和直流（DC）型电动汽车储能系统（EV-ESS）结合在一起，以改善混合AC / DC微电网的运行。该算法的第一层通过调节DC总线电压和DC侧电源管理来确保DC子电网管理。第二层和第三层通过分别管理无功功率和有功功率来调节交流总线电压和频率，从而管理交流电网。多层协调被嵌入到微电网中央控制器（MGCC）中，该中央控制器控制AC和DC微电网之间的互连控制器以及参与的电动汽车（EV）和分布式发电（DG）单元的接口控制器。整个系统在MATLAB / SIMULINK环境中设计，类似于澳大利亚格里菲斯大学正在建设的微电网。使用真实的辐射数据和校园建筑的商业负荷进行了广泛的案例研究。研究了均相和异相单相EV充电的影响，以观察平衡和不平衡情况。考虑到意外情况，测试了从孤岛模式过渡到并网模式期间的同步。从比较仿真结果可以看出，所提出的控制器在所有情况下均表现出有效，可靠和强大的性能。 （C）2016 Elsevier Ltd.保留所有权利。

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