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Techno-economic modelling for energy cost optimisation of households with electric vehicles and renewable sources under export limits

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  • Wu, Yan
  • Aziz, Syed Mahfuzul
  • Haque, Mohammed H.

Abstract

With the proliferation of electric vehicles (EVs), EV charging cost will become an integral part of household energy cost. This research proposes a novel household energy cost optimisation method for grid-connected homes with EV under power export constraints. It addresses the limitations of previous studies by incorporating more realistic variable EV charging characteristics, power export limits, degradation of battery energy storage (BES) and battery salvage revenue into a comprehensive techno-economic energy system model. Cost optimisation results are presented for four system configurations using relatively new time-of-use (ToU) tariff and real load and photovoltaic (PV) generation data for South Australian households. Sensitivity analysis for annual energy cost (AEC) is conducted by varying daily household load demand, PV/BES capacity, power export limits and PV/BES cost. Power flow and peak demand analyses are presented to the impacts of PV, BES and EV on household demand. Results show that PV with BES and EV is the most economical configuration for individual households, where the AEC can be reduced by up to 39.6% compared to a normal household without EV, PV and BES. The BES can effectively reduce household power and energy demands during peak periods by up to 80.4% and 89.1%, respectively.

Suggested Citation

  • Wu, Yan & Aziz, Syed Mahfuzul & Haque, Mohammed H., 2022. "Techno-economic modelling for energy cost optimisation of households with electric vehicles and renewable sources under export limits," Renewable Energy, Elsevier, vol. 198(C), pages 1254-1266.
    • Handle: RePEc:eee:renene:v:198:y:2022:i:c:p:1254-1266
    DOI: 10.1016/j.renene.2022.08.066
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    References listed on IDEAS

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    Cited by:

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    2. Shayan, Mostafa Esmaeili & Najafi, Gholamhassan & Ghobadian, Barat & Gorjian, Shiva & Mamat, Rizalman & Ghazali, Mohd Fairusham, 2022. "Multi-microgrid optimization and energy management under boost voltage converter with Markov prediction chain and dynamic decision algorithm," Renewable Energy, Elsevier, vol. 201(P2), pages 179-189.

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