A Multifunctional and Wireless Droop Control for Distributed Energy Storage Units in Islanded AC Microgrid Applications
A Multifunctional and Wireless Droop Control for Distributed Energy Storage Units in Islanded AC Microgrid Applications
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DOI：
10.1109/tpel.2016.2531379
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发表时间：
2017
影响因子：
6.7
通讯作者：
Xiaofeng Sun;Yancong Hao;Qingfeng Wu;Xiaoqiang Guo;Baocheng Wang
中科院分区：
文献类型：
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作者：
Xiaofeng Sun;Yancong Hao;Qingfeng Wu;Xiaoqiang Guo;Baocheng Wang
提出了一种适用于交流微网分布式储能单元的多功能无线下垂控制方法。为了延长DESU的使用寿命，有效利用DESU的可用容量，本文采用基于SoC的P-f下垂控制方法，实现了SOC的局部均衡。此外，受传统的P-f下垂控制的启发，本文提出了一种fQdt- V下垂控制，以消除无功功率分配误差。f Qdt - V下垂控制通过与无功功率的积分成比例地降低电压而不是无功功率本身来实现。同时，在该方法中加入了与精确分摊有功功率积分成正比的电压补偿项，以使电压恢复到可接受的范围内。该控制策略易于实现，并且不需要通信链路以及增益调度。本文还提出了相应的小信号稳定性的分析所提出的下垂控制方法。仿真和实验结果验证了该方法的可行性和有效性。
A multifunctional and wireless droop control method for distributed energy storage units (DESUs) in ac microgrids is presented in this paper. This paper achieves the state-of-charge (SoC) balancing by employing the SoC-based P-f droop control method locally for the purpose to prolong the service life of DESUs and effectively utilizing the available capability of the DESUs. Besides, inspired by the conventional P-f droop control, a f Qdt - V droop control is proposed in this paper to eliminate the reactive power sharing errors. The f Qdt - V droop control is realized by reducing the voltage proportional to the integration of the reactive power instead of the reactive power itself. Meanwhile, the voltage compensation term which is proportional to the integration of the accurately shared active power is added to this method in order to restore the voltage to the acceptable range. The control strategy is straightforward to implement and does not require communication links as well as the gain scheduling. This paper also presents the analysis of the corresponding small-signal stability of the proposed droop control method. Simulation and experimental results are provided to validate the feasibility and effectiveness of the proposed approach.