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Mitigation of DC Components Using Adaptive BP-PID Control in Transformless Three-Phase Grid-Connected Inverters

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  • Long Bo

    (School of Mechanical and Electrical Engineering, Institute for Electric Vehicle Driving System and Safety Technology, University of Electronic Science and Technology of China, Chengdu 611731, China
    State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)

  • Lijun Huang

    (School of Mechanical and Electrical Engineering, Institute for Electric Vehicle Driving System and Safety Technology, University of Electronic Science and Technology of China, Chengdu 611731, China)

  • Yufei Dai

    (School of Mechanical and Electrical Engineering, Institute for Electric Vehicle Driving System and Safety Technology, University of Electronic Science and Technology of China, Chengdu 611731, China)

  • Youliang Lu

    (School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China)

  • Kil To Chong

    (Department of Electronics & Information Engineering, Chonbuk National University, Jeonju 567, Korea)

Abstract

Transformerless grid-connected inverters, due to their advantages of high efficiency, small volume and light weight, have been the subject of more research and interest in recent years. Due to the asymmetrical driving signal in pulse width modulation (PWM) caused by time-delay, zero-drift of the current sensors and imparities of the power transistors, output of the grid current contains dc component. As a result, power quality of the grid is degraded. In this paper, a dc (direct current) component suppression scheme with adaptive back-propagation (BP) neural network proportional-integral-differential (PID) control is proposed for dc component minimization. Moreover, sliding-window-double-iteration-method (SWDIM) is utilized for fast dc component extraction. Compared with the conventional method, the proposed scheme shows better performance, and the dc component can be attenuated to be within 0.5% of the rated current.

Suggested Citation

  • Long Bo & Lijun Huang & Yufei Dai & Youliang Lu & Kil To Chong, 2018. "Mitigation of DC Components Using Adaptive BP-PID Control in Transformless Three-Phase Grid-Connected Inverters," Energies, MDPI, vol. 11(8), pages 1-22, August.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:2047-:d:162366
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    References listed on IDEAS

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    1. Yitao Liu & Ching-Ming Lai, 2018. "LCL Filter Design with EMI Noise Consideration for Grid-Connected Inverter," Energies, MDPI, vol. 11(7), pages 1-14, June.
    2. Marwa Ben Said-Romdhane & Mohamed Wissem Naouar & Ilhem Slama Belkhodja & Eric Monmasson, 2017. "An Improved LCL Filter Design in Order to Ensure Stability without Damping and Despite Large Grid Impedance Variations," Energies, MDPI, vol. 10(3), pages 1-19, March.
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    Cited by:

    1. Saleh Masoud Abdallah Altbawi & Ahmad Safawi Bin Mokhtar & Saifulnizam Bin Abdul Khalid & Nusrat Husain & Ashraf Yahya & Syed Aqeel Haider & Rayan Hamza Alsisi & Lubna Moin, 2023. "Optimal Control of a Single-Stage Modular PV-Grid-Driven System Using a Gradient Optimization Algorithm," Energies, MDPI, vol. 16(3), pages 1-23, February.
    2. Lei Song & Lijun Huang & Bo Long & Fusheng Li, 2020. "A Genetic-Algorithm-Based DC Current Minimization Scheme for Transformless Grid-Connected Photovoltaic Inverters," Energies, MDPI, vol. 13(3), pages 1-18, February.

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