储能科学与技术 ›› 2019, Vol. 8 ›› Issue (2): 379-385.doi: 10.12028/j.issn.2095-4239.2018.0180

• 研究开发 • 上一篇    下一篇

应用于电动汽车复合储能系统的升压型直流变换器控制策略

聂金泉1,2, 吴华伟1,2, 邝勇3, 童晓辉3, 任晔路3   

  1. 1 湖北文理学院纯电动汽车动力系统设计与测试湖北省重点实验室, 湖北 襄阳 441053;
    2 湖北文理学院汽车与交通工程学院, 湖北 襄阳 441053;
    3 东风襄阳旅行车有限公司, 湖北 襄阳 441000
  • 收稿日期:2018-09-05 修回日期:2018-11-16 出版日期:2019-03-01 发布日期:2018-11-20
  • 通讯作者: 吴华伟。E-mail:whw_xy@163.com
  • 作者简介:聂金泉(1987-),男,博士,研究方向为测试与控制技术,E-mail:niejinquan_hbuas@163.com
  • 基金资助:
    湖北省技术创新专项重大项目(2017AAA133);“机电汽车”湖北省优势特色学科群开放基金(XKQ2018002)

Study on the control strategy for a boost converter used in hybrid energy storage system of electric vehicles

NIE Jinquan1,2, WU Huawei1,2, KUANG Yong3, TONG Xiaohui3, REN Yelu3   

  1. 1 Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle, Hubei University of Arits and Science, Xiangyang 441053, Hubei, China;
    2 School of Automotive and Traffic Engineering, Hubei University of Arits and Science, Xiangyang 441053, Hubei, China;
    3 Dongfeng Xiangyang Touring Car Co., Ltd., Xiangyang 441000, Hubei, China
  • Received:2018-09-05 Revised:2018-11-16 Online:2019-03-01 Published:2018-11-20

摘要: 升压型直流变换器采用滑模变结构控制策略存在收敛速度较慢、抖振剧烈等导致的动态响应品质差问题。本文提出一种双幂次滑模趋近滞环控制策略,在电流跟踪误差估计值的基础上定义滑模面以实现电流跟踪控制,依据系统的未知扰动和负载变化建立自适应状态观测器,结合李雅普诺夫函数设计自适应律,并计算自适应占空比。提出一种双幂次趋近律,根据系统不同趋近过程的特点制定参数选择标准,对系统的动态响应品质进行目的性调节,并设计滑模滞环控制器以削弱由符号函数项所引起的抖振。对以上方法进行了仿真验证,结果显示可有效改善系统的动态特性和电流控制鲁棒性。

关键词: 升压型直流变换器, 双幂次趋近律, 滑模控制, 自适应观测器, 滞环控制器

Abstract: The boost converter suffers the low convergence speed and chattering phenomenon in the scheme with sliding mode variable structure control. A double power reaching law-based sliding mode hysteresis control strategy is proposed. To achieve the current tracking control, a sliding surface is defined based on the estimated tracking current error. By considering the unmodeled dynamics and the unknown disturbances, the adaptive state observer is established. The adaptation laws are designed based on the Lyapunov function and the adaptive duty ratio is calculated. A double power reaching law is proposed, which can set the parameter selection standard according to the different features of system approaching process and purposefully adjust the dynamic response quality. A sliding mode hysteresis controller is designed, which aims at reducing chattering phenomenon caused by the sign function. Simulation results show that the dynamic response performance and robustness of current control are improved effectively.

Key words: double power reaching law, sliding-mode control, adaptive state observer, hysteresis controller, boost converter

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