Article
Thermodynamics
Tabbi Wilberforce, Afaaq Anser, Jangam Aishwarya Swamy, Richard Opoku
Summary: This study aims to develop a hybrid energy storage system (HESS) comprising battery and supercapacitor cells for a commercial Hybrid Electric Vehicle model (Hyundai Sonata) and evaluate its impact on battery health and vehicle performance. Different configurations of the energy storage devices are discussed, with a semi-active configuration used in simulations and testing. The addition of the supercapacitor stabilizes the battery's working status, reducing peak current and improving battery state of charge and temperature. However, there is a slight increase in fuel consumption due to losses in the supercapacitor system. A parametric study suggests that using 2 supercapacitor modules provides optimal results for battery behavior.
Article
Engineering, Electrical & Electronic
Na Fu, Junjun Deng, Zhenpo Wang, Wenbo Wang, Shuo Wang
Summary: An efficiency-oriented control strategy is proposed for LCC-LCC-compensated wireless power transfer (WPT) system to achieve zero-voltage-switching operation over a wide current regulation range. The strategy combines full-bridge and half-bridge modes, identifies ZVS boundaries, and introduces an optimization method to fit theoretical control trajectories into smooth curves. A 4.4-kW WPT prototype verifies the feasibility and validity of the proposed control strategy, achieving high system efficiency even at 20% rated power.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Yubin Pang, Xiaohui Qu, Zijun Ren, Jun Mei
Summary: This paper proposes a steady-state and transient control strategy for the multi-terminal DC distribution power system to address the voltage fluctuation caused by the integration of large capacity LCC and control flexibility VSC. The strategy involves power allocation ratio and switching strategy to stabilize the DC bus voltage. Additionally, a virtual DC generator method and inertia coordinated control strategy are proposed to fully utilize the characteristics of LCC and VSC and further decrease the voltage fluctuation.
IEEE JOURNAL ON EMERGING AND SELECTED TOPICS IN CIRCUITS AND SYSTEMS
(2023)
Article
Computer Science, Information Systems
Manuele Bertoluzzo, Abhay Kumar, Amritansh Sagar
Summary: The advancements in the charging strategy of electric vehicles will have inevitable effects on the electric grid. Electric vehicle battery chargers can perform bidirectional power transfer and offer valuable services to the distribution grid or to the domestic grid. Wireless power transfer chargers provide a safe and user-friendly approach to electric vehicles. Bidirectional wireless power transfer chargers capable of vehicle to grid services are the natural evolution of these concepts.
Article
Thermodynamics
Jaesu Han, Jongbin Woo, Younghyeon Kim, Sangseok Yu
Summary: To address the durability issue in hydrogen fuel cell vehicles, it is important to broaden the studies on fuel cell durability, especially focusing on the mechanical shapes of essential parts or establishing control strategies at the stack level. A study was conducted to establish a control strategy at the vehicle system level using a fuel cell system analysis model and a simulation model equipped with a battery model. Three fuel cell control strategies considering the State of Charge and vehicle speed were evaluated for their durability and fuel efficiency through repeated simulations.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Jiayi Hu, Jianqiu Li, Zunyan Hu, Liangfei Xu, Minggao Ouyang
Summary: This study introduces a novel dual-engine system with the incorporation of dynamic programming algorithm for energy management, achieving lower fuel consumption compared to conventional hybrid systems.
Article
Engineering, Mechanical
Shilei Zhou, Paul Walker, Jinglai Wu, Nong Zhang
Summary: This study investigates the power on gear shift control of a parallel hydraulic hybrid vehicle (PHHV) by developing a multibody dynamic model and designing a control strategy to improve driving comfort and reduce powertrain vibration. The Extended Kalman filter is utilized for parameter estimation, and the torque compensation capability of the hydraulic pump/motor is assessed by analyzing traction force requirements during gear shift.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Construction & Building Technology
Taerang Jung, Henrique Raduenz, Petter Krus, Victor J. De Negri, Jangmyung Lee
Summary: This paper proposes and evaluates a fuel recovery hydraulic system and its controller for an excavator. By using only electronically controlled hydraulic components and defining different operation modes, the system aims to improve performance, efficiency, or a balance between the two. Mathematical analysis and experimental verification on a Volvo 30-ton class excavator demonstrate that the system can increase working cycle speed and reduce fuel consumption.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Automation & Control Systems
Shu Liu, Hongyu You, Yan Liu, Wanfu Feng, Shuo Fu
Summary: This article proposes an optimal control method for a wind-solar storage complement device designed using power prediction. By establishing simulation models and utilizing a wavelet packet neural network to build a power prediction model, a MPPT optimal control strategy that combines the hysteresis loop comparison-based P&O algorithm and the improved firefly algorithm is introduced. It ensures the dynamic tracking ability, speed, and optimization capability of both single and multiple peaks.
Article
Energy & Fuels
Bo Wang, Fan-Rong Cheng, Xian-Zhi Tang
Summary: This paper presents the control strategy for a parallel hydraulic hybrid vehicle based on a compound accumulator and uses dynamic programming algorithm to optimize energy management and torque distribution. Simulation and real-city cycle tests verify the effectiveness of the control strategy and the energy-saving performance of the system.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Analytical
Jiawei Tian, SangHoon An, Azharul Islam, KyungHi Chang
Summary: The research proposes a hybrid power and rate control management strategy for distributed congestion control in 5G-NR-V2X sidelink communications. By dynamically adjusting transmission parameters, this strategy aims to enhance network performance while preventing congestion effectively. Simulation results show that the proposed method improves performance by 6% compared to the conventional approach, controlling the maximum CBR value at 64% during high congestion scenarios, and extending the signal reception range by 20m while maintaining a 90% packet reception ratio (PRR). This study contributes to optimizing the quality and reliability of 5G-NR-V2X sidelink communication, promising advancements in V2X applications in intelligent transportation systems.
Article
Engineering, Chemical
Xin Fang, Juan Li, Yubo Yuan, Xiaodong Yuan
Summary: With the increasing number of electric vehicles (EVs) connected to distribution networks, concentrated high-power charging during peak hours can cause undervoltage issues. This paper proposes a novel decentralized voltage control scheme with the participation of EVs and charging stations (EVCSs), which effectively addresses the undervoltage problems by dividing the distribution network into clusters and optimizing the control strategy.
Article
Computer Science, Information Systems
Lei Liu, Yufei Teng, Xiaopeng Li, Yong Tang, Xiaofeng Jiang
Summary: Based on the hybrid-cascaded topology of UHVDC engineering, this study clarified the mechanism of unbalanced power generation among MMCs and proposed a power equalization strategy. By controlling the active power deviation and designing control enabling logic, automatic power equalization among MMCs can be achieved after a fault, avoiding the detrimental effect on the connected AC system. Simulation results using PSCAD/EMTDC platform validated the effectiveness of the proposed strategy.
Article
Energy & Fuels
Xi Chen, Chunxi Wang, Jianghai Xu, Shichun Long, Fasen Chai, Wenbin Li, Xingxing Song, Xuepeng Wang, Zhongmin Wan
Summary: Dynamic humidity control is crucial for the performance of PEMFC system. A dynamic control model and a PI lambda D mu control strategy are proposed to balance membrane humidity. The PI lambda D mu control method shows better performance in terms of response time, overshoot, and power generation efficiency compared to traditional PID control methods. The power generation efficiency of PEMFC under PI lambda D mu control is improved by 2.1% and 3.9% compared to fuzzy PID and conventional PID control methods.
Article
Energy & Fuels
Yijie Zhang, Qimeng Xue, Diju Gao, Weifeng Shi, Wanneng Yu
Summary: Compared with ground power systems, the intermittent and random fluctuation of ship load power demand poses challenges to the energy management system of ship power systems. To address this issue, a hybrid energy storage system and a two-level model predictive control strategy are proposed to optimize fuel economy and power distribution.
JOURNAL OF ENERGY STORAGE
(2022)