The electrical energy impact of small-scale onsite generation: A case study of a 75 kWp grid-tied PV system

IF 0.6 4区工程技术 Q4 ENERGY & FUELS

Journal of Energy in Southern Africa Pub Date : 2020-11-30 DOI:10.17159/2413-3051/2020/v31i4a8808

Russel Mhundwa, M. Simon, J. Yongoua

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引用次数: 3

Abstract

This study presents an analysis of a 75 kWp grid-tied solar photovoltaic (PV) system with a grid tie limiter to provide energy requirements for an aquaculture centre in the Eastern Cape province of South Africa. A data acquisition system, comprising power and energy consumption meters, was deployed to measure solar PV generation, demand for the facility, and energy drawn from the utility grid. Statistical analysis was conducted on the data to determine the impact of the solar PV plant in reducing demand from the utility grid throughout the day, and this was extrapolated into monthly and annual contributions by the PV system to meeting the energy requirements. Findings reveal that the annual energy yield for the system was 1 864.29 kWh/kWp. The solar contribution to the total load requirement on a 24 hour cycle was 28% (139.82 MWh) from July 2018 to June 2019. Summer and winter average contributions by the PV system were 62% and 57% respectively for the period of 05:30–18:30. The mean monthly solar fraction for operating the farm between sunrise and sunset was 0.44. Furthermore, a total of 141.07 tCO2 has been avoided due to the operation of the PV system.

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小规模现场发电对电能的影响:以75kwp并网光伏系统为例

本研究介绍了一个75千瓦时并网太阳能光伏(PV)系统的分析，该系统具有并网限制器，可为南非东开普省的一个水产养殖中心提供能源需求。一个数据采集系统，包括电力和能源消耗仪表，用于测量太阳能光伏发电、设施需求和从公用事业电网获取的能源。对数据进行统计分析，以确定太阳能光伏电站在减少电网全天需求方面的影响，并将其外推为光伏系统每月和每年对满足能源需求的贡献。结果表明，该系统的年发电量为1 864.29 kWh/kWp。从2018年7月到2019年6月，太阳能对24小时周期总负荷需求的贡献为28%(139.82兆瓦时)。夏季和冬季05:30-18:30期间，光伏系统的平均贡献率分别为62%和57%。在日出和日落之间经营农场的月平均太阳分数为0.44。此外，由于光伏系统的运行，共避免了141.07 tCO2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Energy in Southern Africa ENERGY & FUELS-

CiteScore

3.00

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： The journal has a regional focus on southern Africa. Manuscripts that are accepted for consideration to publish in the journal must address energy issues in southern Africa or have a clear component relevant to southern Africa, including research that was set-up or designed in the region. The southern African region is considered to be constituted by the following fifteen (15) countries: Angola, Botswana, Democratic Republic of Congo, Lesotho, Malawi, Madagascar, Mauritius, Mozambique, Namibia, Seychelles, South Africa, Swaziland, Tanzania, Zambia and Zimbabwe. Within this broad field of energy research, topics of particular interest include energy efficiency, modelling, renewable energy, poverty, sustainable development, climate change mitigation, energy security, energy policy, energy governance, markets, technology and innovation.