Abstract
The electricity in Gaza, Palestine, is limited and scheduled for 4-10 hours per day due to political reasons. This status represents a real problem for different sectors. This paper presents an effective solution especially for the energy supply problem in the residential sector by using an unconventional PV system which operates in stand-alone and grid-connected modes. The system includes a storage battery block with a proper capacity to secure for continuous power supply of a residential house with a daily energy load of 10 kWh. It was found that an unconventional PV system of 3.2 kWp and a storage battery block of 19.2 kWh will be able to cover the total daily energy demands of the house including the outlined electricity cutoff hours. The design of this system and specifics of its components are presented in this paper. The system was simulated by Matlab software, where the daily load curve, grid cutoff hours, and the monthly solar radiation are considered. The obtained simulation results show that the produced PV energy exceeds the load demands during nine months of the year, and thereby, a high battery state of charge (SOC) in the range of 73-84% is achieved. During the three months of the lowest solar radiation (Dec.-Feb.), the produced PV energy is equal to the load demand while the battery state of charge varies in the range of 40-49% which verifies the appropriateness of the proposed PV system. The daily energy yield of the PV system varies between 2.6 and 5.4 kWh/kWp in January and July, respectively, which corresponds to a performance ratio of 90% and 66.25%, respectively.
Highlights
Background and Problem StatementIn Palestine, most of the electrical energy is purchased and controlled from Israeli Electric Company (IEC) [1]
This paper presents an effective solution especially for the energy supply problem in the residential sector by using an unconventional PV system which operates in stand-alone and grid-connected modes
The system includes a storage battery block with a proper capacity to secure for continuous power supply of a residential house with a daily energy load of 10 kWh
Summary
Background and Problem StatementIn Palestine, most of the electrical energy is purchased and controlled from Israeli Electric Company (IEC) [1]. Especially in Gaza, the electrical demand is more than the supply limit; this obliges the distribution companies to schedule the power supply over different periods varying from four to ten hours a day [2, 3]. This status represents a real problem for residents and all other sectors. The electrical power generated from the PV system during blackout hours will be lost if no storage battery is available in the PV system This leads to a considerable energy loss and will result in increasing the payback period of the PV systems. The aim of this paper is to present a solution for such a problem by introducing an unconventional PV system which includes storage batteries, charge
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