Publication detail

Peak-off-peak load shifting for optimal storage sizing in hybrid power systems using Power Pinch Analysis considering energy losses

Mohammad Rozali, N.E. Ho, W.S. Wan Alwi, S.R. Manan, Z.A. Klemeš, J.J. Mohd Yunus, M.N.S. Syed Mohd Zaki, S.A.A.

Original Title

Peak-off-peak load shifting for optimal storage sizing in hybrid power systems using Power Pinch Analysis considering energy losses

Type

journal article in Web of Science

Language

English

Original Abstract

The difference in electricity pricing based on the time of power use has led to load shifting from peak to off-peak hours in hybrid power systems (HPS). Apart from optimising electricity cost, shifting of the load may also change the capacity of storage in the system. Power Pinch Analysis has been recently applied to guide load shifting aiming to minimise the cost of electricity, considering the peak and off-peak electricity pricing. The HPS was assumed to be ideal with 100% efficiency, which is not achievable in actual operational condition. This work extends the study by scrutinising the effects of peak-off-peak load shifting on the capacity of storage in HPS. The effects of energy losses due to the inefficiency during power conversion, transfer and storage in the HPS are considered in developing shifting heuristics to ensure optimal storage size is achieved. Implementation of the proposed load shifting strategy on a case study demonstrates that a reduction of up to 30% in the storage size can be achieved, which led to a minimum storage cost. The distribution of peak hours’ demand to off-peak hours also successfully provide significant savings in the electricity bill.

Keywords

Energy losses; Hybrid power systems (HPS); Load shifting; Power pinch analysis (PoPA); Renewable energy (RE)

Authors

Mohammad Rozali, N.E.; Ho, W.S.; Wan Alwi, S.R.; Manan, Z.A.; Klemeš, J.J.; Mohd Yunus, M.N.S.; Syed Mohd Zaki, S.A.A.

Released

1. 8. 2018

Publisher

Elsevier Ltd

ISBN

0360-5442

Periodical

Energy

Year of study

156

Number

156

State

United Kingdom of Great Britain and Northern Ireland

Pages from

299

Pages to

310

Pages count

12

BibTex

@article{BUT151474,
  author="Mohammad Rozali, N.E. and Ho, W.S. and Wan Alwi, S.R. and Manan, Z.A. and Klemeš, J.J. and Mohd Yunus, M.N.S. and Syed Mohd Zaki, S.A.A.",
  title="Peak-off-peak load shifting for optimal storage sizing in hybrid power systems using Power Pinch Analysis considering energy losses",
  journal="Energy",
  year="2018",
  volume="156",
  number="156",
  pages="299--310",
  doi="10.1016/j.energy.2018.05.020",
  issn="0360-5442"
}