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An Evolutionary Algorithm-Based PWM Strategy for a Hybrid Power Converter
Mathematics ( IF 2.3 ) Pub Date : 2020-07-31 , DOI: 10.3390/math8081247
Alma Rodríguez , Avelina Alejo-Reyes , Erik Cuevas , Francisco Beltran-Carbajal , Julio C. Rosas-Caro

In the past years, the interest in direct current to direct current converters has increased because of their application in renewable energy systems. Consequently, the research community is working on improving its efficiency in providing the required voltage to electronic devices with the lowest input current ripple. Recently, a hybrid converter which combines the boost and the Cuk converter in an interleaved manner has been introduced. The converter has the advantage of providing a relatively low input current ripple by a former strategy. However, it has been proposed to operate with dependent duty cycles, limiting its capacity to further decrease the input current ripple. Independent duty cycles can significantly reduce the input current ripple if the same voltage gain is achieved by an appropriate duty cycle combination. Nevertheless, finding the optimal duty cycle combination is not an easy task. Therefore, this article proposes a new pulse-width-modulation strategy for the hybrid interleaved boost-Cuk converter. The strategy includes the development of a novel mathematical model to describe the relationship between independent duty cycles and the input current ripple. The model is introduced to minimize the input current ripple by finding the optimal duty cycle combination using the differential evolution algorithm. It is shown that the proposed method further reduces the input current ripple for an operating range. Compared to the former strategy, the proposed method provides a more balanced power-sharing among converters.

中文翻译:

基于进化算法的混合功率变换器PWM策略

在过去的几年中,由于直流到直流转换器在可再生能源系统中的应用,人们对它的兴趣增加了。因此,研究团体正在努力提高其效率,以最低的输入电流纹波为电子设备提供所需的电压。最近,已经引入了以升压方式组合升压和Cuk转换器的混合转换器。该转换器的优点是通过以前的策略可以提供相对较低的输入电流纹波。然而,已经提出以相关的占空比来操作,限制了其进一步减小输入电流纹波的能力。如果通过适当的占空比组合获得相同的电压增益,则独立的占空比可以显着减少输入电流纹波。不过,找到最佳占空比组合并不是一件容易的事。因此,本文为混合交错式升压-Cuk转换器提出了一种新的脉冲宽度调制策略。该策略包括开发一种新颖的数学模型,以描述独立占空比与输入电流纹波之间的关系。通过使用差分演化算法找到最佳占空比组合,引入了该模型以最小化输入电流纹波。结果表明,所提出的方法进一步减小了工作范围内的输入电流纹波。与以前的策略相比,所提出的方法在转换器之间提供了更加平衡的功率共享。本文为混合交错式boost-Cuk转换器提出了一种新的脉冲宽度调制策略。该策略包括开发一种新颖的数学模型,以描述独立占空比与输入电流纹波之间的关系。引入该模型以通过使用差分演化算法找到最佳占空比组合来最小化输入电流纹波。结果表明,所提出的方法进一步减小了工作范围内的输入电流纹波。与以前的策略相比,所提出的方法在转换器之间提供了更加平衡的功率共享。本文为混合交错式boost-Cuk转换器提出了一种新的脉冲宽度调制策略。该策略包括开发一种新颖的数学模型,以描述独立占空比与输入电流纹波之间的关系。引入该模型以通过使用差分演化算法找到最佳占空比组合来最小化输入电流纹波。结果表明,所提出的方法进一步减小了工作范围内的输入电流纹波。与以前的策略相比,所提出的方法在转换器之间提供了更加平衡的功率共享。通过使用差分演化算法找到最佳占空比组合,引入了该模型以最小化输入电流纹波。结果表明,所提出的方法进一步减小了工作范围内的输入电流纹波。与以前的策略相比,所提出的方法在转换器之间提供了更加平衡的功率共享。通过使用差分演化算法找到最佳占空比组合,引入了该模型以最小化输入电流纹波。结果表明,所提出的方法进一步减小了工作范围内的输入电流纹波。与以前的策略相比,所提出的方法在转换器之间提供了更加平衡的功率共享。
更新日期:2020-07-31
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