Assortment of Dispatch Strategies with the Optimization of an Islanded Hybrid Microgrid

Sk. A.  Shezan; Md. Fatin  Ishraque; Liton Chandra  Paul; Md Rasel  Sarkar; Md Masud  Rana; Moslem  Uddin; Mohammad Belayet  Hossain; Md Asaduzzaman  Shobug; Md. Imran  Hossain

doi:10.47981/j.mijst.10(01)2022.318(15-24)

Sk. A. Shezan Engineering Institute of Technology, Melbourne, Australia
Md. Fatin Ishraque Pabna University of Science and Technology, Pabna-6600, Bangladesh
Liton Chandra Paul Pabna University of Science and Technology, Pabna-6600, Bangladesh
Md Rasel Sarkar The University of New South Wales, Canberra, ACT 2610, Australia
Md Masud Rana Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Tronoh, Perak, Malaysia
Moslem Uddin The University of New South Wales, Canberra, ACT 2610, Australia
Mohammad Belayet Hossain Deakin University Faculty of Science Engineering and Built Environment, Geelong, Victoria, Australia
Md Asaduzzaman Shobug Pabna University of Science and Technology, Pabna-6600, Bangladesh
Md. Imran Hossain Pabna University of Science and Technology, Pabna-6600, Bangladesh

DOI: https://doi.org/10.47981/j.mijst.10(01)2022.318(15-24)

Keywords: Microgrid, System stability, Dispatch strategies, Optimization, Renewable energy

Abstract

In this work, the optimization of an off-grid micro-hybrid system is evaluated. This is conducted with the estimation of the proper sizing of each element and the steady-state voltage, frequency, and power responses of the microgrid. Kangaroo Island in South Australia is considered to be the test case location and the grid incorporates solar PV (photo-voltaic), diesel generator, battery storage, and wind turbine. Optimal sizing of the studied microgrid is carried out for four various power dispatch techniques: (i) cycle charging (CC), (ii) generator order (GO), (iii) load following (LF), and (iv) combined dispatch (CD). The proposed off-grid micro-hybrid is optimized for three performance indices; minimal Levelized Cost of Energy (LCOE), CO₂emission, and Net Present Cost (NPC). Using iHOGA (improved hybrid optimization by genetic algorithm), microgrid optimization software, all the above-mentioned dispatch strategies have been implemented and following this, MATLAB/Simulink platform has been used for the steady-state studies. The results show that the LF strategy is the utmost optimum dispatch technique in terms of the studied performance indices i.e. considering the optimal size and voltage and frequency responses. The results obtained from these studies provide a pathway for the estimation of the resource-generation-load combination for the islanded off-grid microgrid for its optimal operation with the various dispatch strategies.

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