MPPT Algorithm of Vehicle Exhaust Thermoelectric Power Generation System Based on Linear Extrapolation

Wang Zhewei1, Zhu Wenchao1,2, Huang Liang1, Xie Changjun1,2, Li Hao1

1. School of Automation, Wuhan University of Technology, Wuhan 430070; 2. Hubei Key Laboratory of Modern Auto Parts （

Technology, Wuhan University of Technology, Wuhan 430070）

Abstract Based on the vehicle exhaust electricity generation system with the local stepwise topology optimization,【 】this paper proposes a Maximum Power Point Tracking (MPPT) algorithm based on linear extrapolation. With the circuit impedance adjusted in real time to complete the impedance matching of the target load, the simulation model of thermoelectric power generation system is established to verify the feasibility of the algorithm that has passed the bench test, and the sensitivity and error of MPPT algorithm based on linear extrapolation and the classical disturbance observation method are compared in different working conditions. Test results show that the tracking error of MPPT algorithm based on linear extrapolation is 4.09% at the engine speed of 3 500 r/min, and the minimum tracking error in the different working conditions is 3.55% . The results show that the proposed algorithm has shorter tracking time and smaller error and can maximize the system power output.

Key words: Waste heat electricity generation device, Topology of thermoelectric module, Linear extrapolation, Maximum power point tracking

【引用格式】 , , , . [J]. , 2021(8):

王喆伟 朱文超 黄亮 等 基于线性外推的汽车尾气热电发电系统最大功率跟踪算法 汽车技术14-19.

WANG Z W, ZHU W C, HUANG L, et al. MPPT Algorithm of Vehicle Exhaust Thermoelectric Power Generation System Based on Linear Extrapolation[J]. Automobile Technology, 2021(8): 14-19.