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Signal flow graph model and control of dual input boost converter with voltage multiplier cell
AEU - International Journal of Electronics and Communications ( IF 3.2 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.aeue.2020.153345
Mohan Appikonda , Dhanalakshmi Kaliaperumal

The dual input boost converter (DIBC) with dual boost and integrated voltage multiplier cell (VMC) operating in continuous conduction mode (CCM) at duty cycles larger than 0.5 is a necessity to deliver a high voltage gain for energy systems possessing two independent renewable energy resources (RES). However, the modelling of this higher order converter is challenging due to the overlapping switching signals, multi-stage operation and the parasitic elements. Thus this paper aims to develop the small-signal transfer function model by applying the signal flow graph (SFG) approach. In addition, to handle the output voltage regulation of this converter with unknown load values this paper presents the design of adaptive current-mode (ACM) control using an adaptive law to estimate the uncertain load resistance in terms of load conductance to compute the reference inductor currents. Two independent input inductor reference currents are considered to ensure the decoupling among the interacting loops. The dynamic performance of the ACM controller to handle unknown load and an improved version of a traditional control, the feedforward plus feedback controller for known values of load resistance are designed and assessed. A 200W converter model is built, and the controls are implemented using FPGA.



中文翻译:

具有倍压单元的双输入升压转换器的信号流图模型和控制

具有双升压和集成电压倍增单元(VMC)的双输入升压转换器(DIBC)以大于0.5的占空比在连续导通模式(CCM)下运行,对于拥有两个独立可再生能源的能源系统来说,有必要提供高电压增益资源(RES)。然而,由于重叠的开关信号,多级操作和寄生元件,该高阶转换器的建模具有挑战性。因此,本文旨在通过应用信号流图(SFG)方法来开发小信号传递函数模型。此外,为了处理具有未知负载值的该转换器的输出电压调节,本文提出了一种自适应电流模式(ACM)控制的设计,该方法使用自适应定律根据负载电导来估算不确定的负载电阻,以计算参考电感器电流。考虑两个独立的输入电感器参考电流,以确保相互作用的环路之间去耦。设计并评估了ACM控制器处理未知负载的动态性能以及传统控制的改进版本,即已知负载电阻值的前馈加反馈控制器。一种 设计并评估了ACM控制器处理未知负载的动态性能以及传统控制的改进版本,即已知负载电阻值的前馈加反馈控制器。一种 设计并评估了ACM控制器处理未知负载的动态性能以及传统控制的改进版本,即已知负载电阻值的前馈加反馈控制器。一种200w ^ 建立转换器模型,并使用FPGA实现控制。

更新日期:2020-08-01
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