Optimization-Based Fuzzy Energy Management Strategy for PEM Fuel Cell/Battery/Supercapacitor Hybrid Construction Excavat
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Optimization‑Based Fuzzy Energy Management Strategy for PEM Fuel Cell/Battery/Supercapacitor Hybrid Construction Excavator Hoang Vu Dao1 · Xuan Dinh To1 · Hoai Vu Anh Truong1 · Tri Cuong Do1 · Cong Minh Ho1 · Tri Dung Dang1,3 · Kyoung Kwan Ahn2 Received: 15 April 2020 / Revised: 18 August 2020 / Accepted: 25 August 2020 © Korean Society for Precision Engineering 2020
Abstract Fuel cell hybrid electric construction equipment (FCHECE) is known as a promising solution to achieve the goal of energy saving and environment protection. Energy management strategy is a key technology of FCHECE, which splits the energy flow between power sources. This paper presents a novel optimal energy management strategy for a hybrid electric-powered hydraulic excavator system to enhance power performance, power sources lifespan, and fuel economy. As for the proposed powertrain configuration, fuel cell serves as a primary energy source, and supercapacitor and battery are considered as energy storages. The integration of supercapacitor and battery in fuel cell vehicle has advantages of improving power performance and storing the regenerative energy for future usage. An energy management strategy based on fuzzy logic control and a rule-based algorithm is proposed to effectively distribute the power between the three sources and reuse the regenerative energy. Furthermore, the parameters of the fuzzy logic system are optimized using the combination of a backtracking search algorithm which provides a good direction to the global optimal region and sequential dynamic programming as a local search method to fine-tune the optimal solution in order to reduce the hydrogen consumption and prolong the lifetime of the power sources. Simulation results show that the proposed energy management strategy enhances the vehicle performance, improves fuel economy of the FCHECE by 10.919%, increase battery and supercapacitor charge-sustaining capability as well as efficiency of the fuel cell system. Keywords PEM fuel cell · Energy management strategy · Construction excavator · Fuzzy logic · Backtracking search algorithm · Sequential quadratic programming Nomenclature Abbreviations BAT Battery BSA Backtracking search algorithm EMS Energy management strategy Hoang Vu Dao, Xuan Dinh To and Hoai Vu Anh Truong contributed equally to the work * Kyoung Kwan Ahn [email protected] 1
Graduate School of Mechanical Engineering, University of Ulsan, 93, Daehak‑ro, Namgu, Ulsan 680‑749, South Korea
2
School of Mechanical Engineering, University of Ulsan, 93, Daehak‑ro, Namgu, Ulsan 680‑749, South Korea
3
Department of Mechatronics, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City 700000, Vietnam
ERS Energy regeneration system FCHECE Fuel cell hybrid electric construction equipment FCV Fuel cell vehicle GA Genetic algorithm PEMFC Polymer electrolyte membrane fuel cell SC Supercapacitor SQP Sequential quadratic programming Symbol Cdl Double-layer capacitance (F) c
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