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All Journal International Journal of Electrical and Computer Engineering Bulletin of Electrical Engineering and Informatics
Vu Hoang Phuong
Hanoi University of Science and Technology
Computer Science & IT Electrical & Electronics Engineering

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Speed profile optimization of an electrified train in Cat Linh-Ha Dong metro line based on pontryagin's maximum principle An Thi Hoai Thu Anh; Nguyen Van Quyen; Nguyen Thanh Hai; Nguyen Van Lien; Vu Hoang Phuong
International Journal of Electrical and Computer Engineering (IJECE) Vol 10, No 1: February 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1070.058 KB) | DOI: 10.11591/ijece.v10i1.pp233-242

Abstract

An urban railway is a complex technical system that consumes large amounts of energy, but this means of transportation still has been obtained more and more popularity in densely populated cities because of its features of high-capacity transportation capability, high speed, security, punctuality, lower emission, reduction of traffic congestion. The improved energy consumption and environment are two of the main objectives for future transportation. Electrified trains can meet these objectives by the recuperation and reuse of regenerative braking energy and by the energy - efficient operation. Two methods are to enhance energy efficiency: one is to improve technology (e.g., using energy storage system, reversible or active substations to recuperate regenerative braking energy, replacing traction electric motors  by energy-efficient traction system as permanent magnet electrical motors; train's mass reduction by lightweight material mass...); the other is to improve operational procedures (e.g. energy efficient driving including: eco-driving; speed profile optimization; Driving Advice System (DAS); Automatic Train Operation (ATO); traffic management optimization...). Among a lot of above solutions for saving energy, which one is suitable for current conditions of metro lines in Vietnam. The paper proposes the optimization method based on Pontryagin's Maximum Principle (PMP) to find the optimal speed profile for electrified train of Cat Linh-Ha Dong metro line, Vietnam in an effort to minimize the train operation energy consumption.
Implementation of FOC algorithm using FPGA for GaN-based three phase induction motor drive Tung Duong Do; Nam Duong Le; Vu Hoang Phuong; Nguyen Tung Lam
Bulletin of Electrical Engineering and Informatics Vol 11, No 2: April 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v11i2.3569

Abstract

Induction motor is widely used in industrial applications due to its low cost, simple design, and reliability. In this paper, the induction motor control structure FOC will be implemented on the FPGA platform for the drive system using GaN devices. By using GaN technology, the switching frequency can be up to 100 kHz instead of 2 to 20 kHz when using IGBT transistors. It leads to a significant reduction in switching loss as well as increasing the power density of the power electronic converter. The control structure will be programmed in VHDL language on the system-on-chip environment of Xilinx Zybo z7010 FPGA development board. The validity of the research is verified by some results when operating with HIL device.
Co-Authors An Thi Hoai Thu Anh Nam Duong Le Nguyen Thanh Hai Nguyen Tung Lam Nguyen Van Lien Nguyen Van Quyen Tung Duong Do