Limitations in Energy Management Systems: A Case Study for Resilient Interconnected Microgrids
Limitations in Energy Management Systems: A Case Study for Resilient Interconnected Microgrids
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DOI：
10.1109/tsg.2018.2890108
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发表时间：
2019-09
影响因子：
9.6
通讯作者：
Leong Kit Gan;A. Hussain;D. Howey;Hak-Man Kim
中科院分区：
文献类型：
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作者：
Leong Kit Gan;A. Hussain;D. Howey;Hak-Man Kim
本文探讨的影响，能源管理系统（EMS）的差异，微电网可能会遇到由于不同的时间范围和实施环境中的高层EMS相比，较低级别的控制框架。这些包括可再生能源和负荷需求曲线的时移、幅度偏差和平均效应。我们使用弹性微电网的概念作为案例研究，考虑到这种系统的可靠性是至关重要的，特别是在孤岛模式。我们通过实验证明，非理想效应自然发生在微电网系统中，导致测量和预期的理想电池荷电状态之间的差异。因此，如果为了不违反电池荷电状态的下限而发生非计划的甩负荷，则微电网的弹性可能受到影响。允许电池在更高的深度放电可以暂时解决问题，但是，这是以更高的电池退化率为代价的。相反，我们提出了一种功率共享方案，通过互连微电网，可以提高弹性。
This paper explores the impact of energy management systems (EMSs) discrepancies that a microgrid may experience due to different time horizon and implementation environment in higher-level EMS as compared to lower level control frameworks. These include time-shifting, magnitude deviation, and averaging effect of the renewables and load demand profiles. We use the resilient microgrid concept as a case study considering that the reliability of such system is crucial, especially during islanding mode. We demonstrate through experiment that the non-ideal effects naturally take place in a microgrid system, resulting a discrepancy between the measured and expected ideal battery state-of-charge. Accordingly, the resiliency of the microgrid may be affected if unplanned load shedding took place in order to not violate the lower limit of the battery state-of-charge. Allowing the battery to discharge at a higher depth may temporarily solve the problem, however, this comes at the expense of a higher rate of battery degradation. Instead, we proposed a power sharing scheme and by interconnecting the microgrids, the resiliency may be improved.