International Journal of Power and Energy Research

Download PDF (1583 KB) PP. 53 - 68 Pub. Date: October 8, 2018

DOI: 10.22606/ijper.2018.24001

• Mohammad Aman Yaqobi^*
  Department of Electrical and Electronic, University of The Ryukyu, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
• Hidehito Matayoshi
  Department of Electrical and Electronic, University of The Ryukyu, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
• Mir Sayed Shah Danish
  Department of Electrical and Electronic, University of The Ryukyu, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
• Naomitsu Urasaki
  Department of Electrical and Electronic, University of The Ryukyu, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan
• Abdul Motin Howlader
  Hawaii Natural Energy Institute, University of Hawaii, Mohoa, Honolulu, Hawaii 96822, USA
• Tomonobu Senjyu
  Department of Electrical and Electronic, University of The Ryukyu, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan

The recent evolution in technology and lifestyle has been led to a dramatic increase in electricity demand so that the local communities are encountered with challenges of huge initial costs, and sustainable extension to a national grid. Here in this paper, a DC microgrid cluster with three small areas (A, B and C) is proposed. Control and power stability of small-scale electrical system using renewable resources is a big challenge. In this study, the operation of DC microgrid and behavior of the system at different operating conditions is evaluated under different condition of the solar radiation and temperature changes for specific time periods. The DC Converters with PI control strategies are integrated to control the system performance and load-power balancing. The DC bus voltage level is employed as an information carrier for controller to maintain operation stability, improve efficiency, and enhance the redundancy of a system. At the meanwhile, the Maximum Power Point Trucking Incremental Conductance (MPPT-IC) algorithm is applied to maximize the efficiency and regulate the output voltage of the PV system to desired DC bus voltage. The PV arrays with battery and bidirectional converter are simulated to overcome the intermittency problems of PV outputs. Some typical operation modes are simulated using MATLABR /Simulink to confirm the proposed model preference compared to the literature.

DC microgrid, storage system, interfaced converters, PI control strategy, rural electrification.

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