Supervisory Control of an Adaptive-Droop Regulated DC Microgrid With Battery Management Capability
Supervisory Control of an Adaptive-Droop Regulated DC Microgrid With Battery Management Capability
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DOI：
10.1109/tpel.2013.2257857
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发表时间：
2014-02
影响因子：
6.7
通讯作者：
T. Dragičević;J. Guerrero;J. Vasquez;D. Skrlec
中科院分区：
文献类型：
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作者：
T. Dragičević;J. Guerrero;J. Vasquez;D. Skrlec
由于直流电源系统与光伏（PV）系统和二次电池等直流输出型电源的良好匹配，直流电源系统在可再生能源应用中获得了越来越多的关注。在本文中，几个分布式发电机（DG）已合并在一起，一对电池和负载，形成一个自治的直流微电网（MG）。为了克服与一个独立的MG内的多个电池的协调相关的控制挑战，提出了一种双层递阶控制策略。1)单元级主控制层采用自适应电压降方法建立，目的是调节公共母线电压，并在适度补充时维持电池的荷电状态（SOC）彼此接近。每个单元的控制扩展到单元特定的算法，即，电池充电结束和可再生能源的最大功率点跟踪（MPPT），设计了平滑的在线重叠; 2）监控层设计为使用中央控制器和电源之间的低带宽通信接口，以收集虚拟电阻（VR）自适应计算所需的数据以及改变单元级运行模式的传输标准。整个VR范围内的小信号稳定性。开发的控制性能进行了评估，通过实验结果。
DC power systems are gaining an increasing interest in renewable energy applications because of the good matching with dc output type sources such as photovoltaic (PV) systems and secondary batteries. In this paper, several distributed generators (DGs) have been merged together with a pair of batteries and loads to form an autonomous dc microgrid (MG). To overcome the control challenge associated with coordination of multiple batteries within one stand-alone MG, a double-layer hierarchical control strategy was proposed. 1) The unit-level primary control layer was established by an adaptive voltage-droop method aimed to regulate the common bus voltage and to sustain the states of charge (SOCs) of batteries close to each other during moderate replenishment. The control of every unit was expanded with unit-specific algorithm, i.e., finish-of-charging for batteries and maximum power-point tracking (MPPT) for renewable energy sources, with which a smooth online overlap was designed and 2) the supervisory control layer was designed to use the low-bandwidth communication interface between the central controller and sources in order to collect data needed for adaptive calculation of virtual resistances (VRs) as well as transit criteria for changing unit-level operating modes. A small-signal stability for the whole range of VRs. The performance of developed control was assessed through experimental results.