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Peak-off-peak load shifting for hybrid power systems based on Power Pinch Analysis

Nor Erniza Mohammad Rozali, Sharifah Rafidah Wan Alwi, Zainuddin Abdul Manan and Jiří Jaromír Klemeš

Energy, 2015, vol. 90, issue P1, 128-136

Abstract: Electricity load distribution tends to vary throughout the day depending on the time of operations of equipment and processes and the ambient weather conditions. Load shifting from peak to off-peak hours changes the electricity load profile and allows users to control the peak electricity demand and optimise the electricity cost. Power Pinch Analysis (PoPA) has been used recently to guide load shifting aimed at reducing the electricity maximum demand. This work applies the PoPA to optimise the overall electricity cost for a hybrid power system by performing cost-effective load shifting that takes advantage of the peak and off-peak electricity tariffs. Two new heuristics for load shifting have been proposed in this work. The results show that the total outsourced electricity during the peak hours has been successfully distributed to the off-peak hours to minimise the electricity cost.

Keywords: Power pinch analysis (PoPA); Hybrid power systems (HPS); Renewable energy (RE); load shifting; electricity tariff (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (11)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:90:y:2015:i:p1:p:128-136

DOI: 10.1016/j.energy.2015.05.010

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