Active Fault Management for Microgrids
Active Fault Management for Microgrids
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DOI：
10.1109/iecon.2018.8591522
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发表时间：
2018-10
期刊：
影响因子：
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通讯作者：
Wenfeng Wan;Yan Li;B. Yan;Mikhail A. Bragin;J. Philhower;P. Zhang;P. Luh;Guy Warner
中科院分区：
文献类型：
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作者：
Wenfeng Wan;Yan Li;B. Yan;Mikhail A. Bragin;J. Philhower;P. Zhang;P. Luh;Guy Warner
故障管理对于有效地支持日益增长的微电网在配电网中的渗透至关重要，但仍然是一个悬而未决的问题。现有的穿越方法都不能在不增加故障电流大小的情况下穿越对称和不对称故障，同时平衡微网功率，消除微网逆变器的双频纹波。本文通过提出一种新的主动故障管理（AFM）方法弥补了这一空白。新的贡献包括：1)开发了一个新的概念AFM来控制电压下降期间的多个变量；2)基于优化的AFM，根据指导协调不同目标；3)优化与反馈控制相结合，其中优化方法提供不同目标之间的最优权衡，反馈控制保证所选工作点的准确实现。针对不同类型故障的仿真结果表明，与传统的平顺方法相比，所开发的AFM可以更好地实现各控制目标之间的权衡和协调。
Fault management is critical for efficiently supporting the increasing microgrids' penetration in distribution networks but remains an open problem. No existing ride through methods can ride through symmetrical and asymmetrical faults without increasing the fault current magnitude, meanwhile balancing microgrid power and eliminating double frequency ripples in microgrid inverters. The paper bridges this gap by contributing a novel active fault management (AFM) method. The new contributions include: 1) the development of a new conceptual AFM to control multiple variables during voltage dips; 2) the optimization-based AFM to coordinate different objectives according to a guidance and 3) a combined optimization and feedback control, during which optimization method provides the optimal trade-offs among different objectives and the feedback control ensures accurate realization of chosen operation points. Simulations with different types of faults prove that the developed AFM can achieve better trade-offs and coordination among various control objectives in comparison to the conventional ride through method.