A DC–DC Multiport-Converter-Based Solid-State Transformer Integrating Distributed Generation and Storage
A DC–DC Multiport-Converter-Based Solid-State Transformer Integrating Distributed Generation and Storage
复制标题
DOI：
10.1109/tpel.2012.2215965
复制
发表时间：
2013
影响因子：
6.7
通讯作者：
S. Falcones;R. Ayyanar;X. Mao
中科院分区：
文献类型：
--
作者：
S. Falcones;R. Ayyanar;X. Mao
在未来的智能电网中，研究人员提出用固态变压器取代常规配电变压器。SST为存储和分布式发电（如光伏）的集成提供接口，并实现电能质量特性。本文提出了一种基于四有源桥式（QAB）变换器的SST拓扑结构，它不仅对负载提供隔离，而且对DG和存储也提供隔离。针对通用多有源桥转换器（MAB），建立了基于旋转器的平均模型，推导了MAB端口额定功率的表达式。然后将这些结果应用于QAB转换器的分析。为了控制基于QAB的集成光伏和电池的SST的dc-dc级，介绍了一种考虑QAB变换器交叉耦合特性的技术，以改善高压-直流链路的调节。这是通过将干扰转移到电池上来完成的。控制回路采用不同带宽的单输入单输出技术设计。通过大量的仿真和实验结果验证了控制策略的动态性能。
The Solid-state transformer (SST) has been proposed by researchers to replace the regular distribution transformer in the future smart grid. The SST provides ports for the integration of storage and distributed generation (DG), e.g., photovoltaic (PV), and enables the implementation of power quality features. This paper proposes a SST topology based on a quad-active-bridge (QAB) converter which not only provides isolation for the load, but also for DG and storage. A gyrator-based average model is developed for a general multiactive-bridge (MAB) converter, and expressions to determine the power rating of the MAB ports are derived. These results are then applied to analyze the QAB converter. For the control of the dc-dc stage of the proposed QAB-based SST integrating PV and battery, a technique that accounts for the cross-coupling characteristics of the QAB converter in order to improve the regulation of the high-voltage-dc link is introduced. This is done by transferring the disturbances onto the battery. The control loops are designed using single-input single-output techniques with different bandwidths. The dynamic performance of the control strategy is verified through extensive simulation and experimental results.