Modeling Dual Active Bridge Converters in DC Distribution Systems
Modeling Dual Active Bridge Converters in DC Distribution Systems
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DOI：
10.1109/tpel.2018.2867434
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发表时间：
2019-06
影响因子：
6.7
通讯作者：
Jacob A. Mueller;J. Kimball
中科院分区：
文献类型：
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作者：
Jacob A. Mueller;J. Kimball
针对含有双有源桥式(DAB)变流器的系统提出了建模改进。首先，描述了一种建立多路变流器系统模型的系统方法。该方法生成适合于系统级分析和高效的时域仿真的连续时间大信号平均模型。虽然基本DAB模型是使用广义平均建模(GAM)得出的，但系统级构建不需要指定基本周期。其次，提出了一种重构高频DAB变压器电流的方法。这种方法极大地提高了变压器电流建模的准确性，这是使用GAM导出的DAB模型的一个关键弱点。此外，该方法可以根据需要离线应用，因此不会影响时域仿真的计算复杂度。系统级建模过程和谐波重构方法在开关仿真和硬件实验中均得到了验证。
Modeling improvements are proposed for systems containing dual active bridge (DAB) converters. First, a systematic approach to constructing models of multiconverter systems is described. The method generates continuous-time large-signal average models that are suitable for system-level analysis and efficient time-domain simulation. Although the base DAB models are derived using generalized average modeling (GAM), the system-level construction does not require the specification of a base period. Second, a method of reconstructing currents in the high-frequency DAB transformer is proposed. This method significantly improves accuracy in modeling transformer current, which is a critical weakness of DAB models derived using GAM. Furthermore, the method is applied offline as needed, so it does not affect the computational complexity of time-domain simulation. Both the system-level model construction procedure and harmonic reconstruction method are validated in switching simulations and hardware experiments.