Large & small signal modeling of dual active bridge converter using improved first harmonic approximation
Large & small signal modeling of dual active bridge converter using improved first harmonic approximation
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DOI：
10.1109/apec.2017.7930844
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
S. Bhattacharya
中科院分区：
文献类型：
--
作者：
S. Shah;S. Bhattacharya
提出了一种基于单相双有源电桥(DAB)的移相DC-DC转换器的大信号和小信号状态空间建模方法。通过在传统的一次谐波近似(FHA)技术中引入修正因子，提出了一种改进的一次谐波近似(I-FHA)方法。以输出直流电压和对应于有功功率和环流功率的变压器电流的两个正交次谐波分量作为状态变量。由此推导出的大信号模型形式简单，对于理想的变流器来说是准确的。在I-FHA模型的基础上发展了一个小信号模型。最后，通过时域仿真和实验结果对大信号和小信号模型进行了验证。
The paper derives a technique to develop large and small signal state-space models of a single-phase dual active bridge (DAB) based DC-DC converter operated in phase-shift mode. An improved first harmonic approximation (I-FHA) method is proposed by introducing a correction factor to the conventional first harmonic approximation (FHA) technique. The output DC voltage and the two orthogonal components of first harmonic of transformer current, corresponding to active and circulating powers, are used as state-variables. The large-signal model, thus derived, is of simple form and accurate for ideal converter. A small-signal model is also developed from the I-FHA model. Finally, the large and small signal models are validated through time-domain simulations and experimental results.