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首页> 外文期刊>Journal of power electronics >Modeling and controller optimization for current-fed isolated bidirectional DC-DC converters
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Modeling and controller optimization for current-fed isolated bidirectional DC-DC converters

机译：用于电流送频双向DC-DC转换器的建模与控制器优化

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Current-fed isolated bidirectional DC-DC converters (CF-IBDCs) play an important role in battery energy storage systems. However, the closed-loop dynamics is rather slow with conventional proportional-integral controllers because a precise mathematic model remains absent for optimization. In this paper, a simple precise mathematical model is presented to describe the large and small-signal behaviors of the CF-IBDC. The full-order continuous model can accurately capture the dynamic behaviors and cover all operation conditions. The small-signal model is derived, and the DC filter inductors and clamp capacitors are found to be the natural causes of instability. Based on this finding, special controllers are proposed to optimize the dynamic response of the full closed-loop control system. The dynamic response time of the CF-IBDC is greatly reduced with the proposed controller. The correctness of the presented model and the dynamic response of the optimized closed-loop control system are verified by simulations.
机译：电流供给的隔离双向DC-DC转换器（CF-IBDCS）在电池储能系统中起重要作用。然而，闭环动态与传统的比例积分控制器相当慢，因为精确的数学模型保持不存在优化。在本文中，提出了一种简单的精确数学模型来描述CF-IBDC的大小信号行为。全阶连续模型可以准确地捕获动态行为并覆盖所有操作条件。衍生小信号模型，发现直流滤波器电感器和钳位电容是不稳定性的自然原因。基于该发现，建议特殊控制器优化完整闭环控制系统的动态响应。 CF-IBDC的动态响应时间与所提出的控制器大大减少。通过模拟验证所呈现的模型和优化闭环控制系统的动态响应的正确性。

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