Affiliation:
1. College of Information and Electrical Engineering, Hunan University of Science and Technology, Xiangtan 411100, China
2. College of Computer and Electrical Engineering, Hunan University of Arts and Science, Changde 415000, China
3. Key Laboratory of Hunan Province for Control Technology of Distributed Electric Propulsion Air Vehicle, Changde 415000, China
Abstract
This paper focuses on the high-performance bidirectional DC-DC converter required in distributed electric propulsion (DEP) systems, with the dual active bridge (DAB) converter chosen as the subject of study. To achieve the goal of stabilizing the output voltage while improving the converter’s anti-interference ability and dynamic performance, this paper proposes a novel strategy. In particular, it combines the Linear Extended State Observer (LESO) with a sliding mode control (SMC), proposing a sliding mode control strategy based on the Linear Extended State Observer (LESO-SMC). Notably, this control strategy not only retains the fast dynamic performance of Linear Active Disturbance Rejection Control (LADRC) and the robustness of SMC but also addresses the significant chattering issue inherent in traditional SMC. Comparing the traditional PI, LADRC, and SMC strategies, the results show that when the load changes, the voltage fluctuation of the LESO-SMC strategy proposed in this paper is 0.165 V (0.25 V) in the Matlab/Simulink and RT-Lab platforms, and the average adjustment time is 4 ms (3.5 ms). In contrast, the average voltage fluctuations of PI and LADRC strategies were 3.7 V (4.9 V) and 0.55 V (1.35 V), and the average adjustment times were 99.5 ms (201 ms) and 71.5 ms (77.5 ms), respectively. When the input voltage changes, the proposed LESO-SMC strategy adjusts faster and has almost no voltage fluctuations, while the average voltage fluctuations of the PI and LADRC strategies in the simulation are 0.5 V and 0.1 V, and the average adjustment times are 89.5 ms and 35 ms, and the change in the input voltage in the RT-Lab platform has very little effect on the output voltage. Compared with SMC, the LESO-SMC strategy has no chattering problem. In summary, compared to the other three control strategies, the LESO-SMC strategy proposed in this paper exhibits superior performance in terms of voltage fluctuation and adjustment time during load changes and input voltage changes. It shows a robust anti-interference ability and a rapid dynamic response performance.
Funder
National Natural Science Foundation of China
Hunan Provincial Natural Science Foundation Regional Joint Fund
Science Furthermore Technology Innovation Program of Hunan Province
Subject
Electrical and Electronic Engineering,Computer Networks and Communications,Hardware and Architecture,Signal Processing,Control and Systems Engineering
Reference29 articles.
1. Review of electric power system of distributed electric propulsion aircraft;Kong;Acta Aeronaut. Astronaut. Sin.,2018
2. Improving system efficiency for the more electric aircraft: A look at DC/DC converters for the avionic onboard dc microgrid;Buticchi;IEEE Ind. Electron. Mag.,2017
3. Analysis, design, and implementation of a differential power processing DMPPT with multiple buck–boost choppers for photovoltaic module;Jiang;IEEE Trans. Power Electron.,2021
4. A comprehensive optimization control of dual-active-bridge DC–DC converters based on unified-phase-shift and power-balancing scheme;Hou;IEEE Trans. Power Electron.,2018
5. Bai, H., Mi, C., Wang, C., and Gargies, S. (2008, January 10–13). The dynamic model and hybrid phase-shift control of a dual-active-bridge converter. Proceedings of the 2008 34th Annual Conference of IEEE Industrial Electronics, Orlando, FL, USA.
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献