Fractional-Order Lead-Lag Compensation Control for Interleaved Buck-Boost Converters

IF 1.6 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Lingling Xie, Enkun Tan, Jiajia Huang, Bin Liu
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Abstract

As an important element of the renewable energy distribution generations, the modeling accuracy and control performance of the interleaved Buck-Boost converter directly affects the stability and efficiency of the renewable power generation. Based on the fact that the inductor and capacitance are fractional-order (FO) elements, the Buck-Boost converter is FO system. At present, most FO control strategy research has focused on the integer-order (IO) converters, which is inconsistent with the fractional order nature of converters. In order to improve the stability and dynamical performance of the FO interleaved Buck-Boost converter control system, a dual-loop control system based on the fractional-order lead-lag compensation control (FOLLCC) strategy is proposed. To begin with, the FO state space average model for interleaved Buck-Boost converter operating in continuous conduction mode (CCM) is established according to the FO calculus theory and state space average method. Then, the FOLLCC of the FO interleaved Buck-Boost is designed by using the peak current closed-loop control with inner current loop outer voltage loop. The impact of different FO controllers on the steady-state performance of the system is analyzed to improve the control effect. Using MATLAB for simulation, the simulation results show that the control system based on FOLLCC has shorter rise times, faster response speed, stronger robustness, and better dynamic performance. Finally, the experiments verify the effectiveness of the proposed approach.

Abstract Image

交错降压-升压转换器的分数阶前导滞后补偿控制
作为可再生能源分布式发电的重要组成部分,交错降压-升压转换器的建模精度和控制性能直接影响到可再生能源发电的稳定性和效率。基于电感和电容是分数阶(FO)元素这一事实,降压-升压转换器属于 FO 系统。目前,大多数 FO 控制策略研究都集中在整数阶(IO)转换器上,这与转换器的分数阶性质不符。为了提高 FO 交错降压-升压转换器控制系统的稳定性和动态性能,本文提出了一种基于分数阶前导滞后补偿控制(FOLLCC)策略的双环控制系统。首先,根据 FO 微积分理论和状态空间平均法,建立了连续导通模式(CCM)下交错降压-升压转换器的 FO 状态空间平均模型。然后,利用内电流环外电压环的峰值电流闭环控制设计了 FO 交错降压-升压转换器的 FOLLCC。分析了不同 FO 控制器对系统稳态性能的影响,以改善控制效果。使用 MATLAB 进行仿真,仿真结果表明,基于 FOLLCC 的控制系统具有更短的上升时间、更快的响应速度、更强的鲁棒性和更好的动态性能。最后,实验验证了所提方法的有效性。
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来源期刊
Journal of Electrical Engineering & Technology
Journal of Electrical Engineering & Technology ENGINEERING, ELECTRICAL & ELECTRONIC-
CiteScore
4.00
自引率
15.80%
发文量
321
审稿时长
3.8 months
期刊介绍: ournal of Electrical Engineering and Technology (JEET), which is the official publication of the Korean Institute of Electrical Engineers (KIEE) being published bimonthly, released the first issue in March 2006.The journal is open to submission from scholars and experts in the wide areas of electrical engineering technologies. The scope of the journal includes all issues in the field of Electrical Engineering and Technology. Included are techniques for electrical power engineering, electrical machinery and energy conversion systems, electrophysics and applications, information and controls.
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