Grid-connected photovoltaic system to mitigate momentary voltage dip based on the balance between the active and reactive powers

IF 0.6 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Acta Scientiarum-technology Pub Date : 2022-03-11 DOI:10.4025/actascitechnol.v44i1.58660
A. Piccini, G. C. Guimarães, A. C. Souza, Ana Maria Denardi, L. R. C. Silva, J. O. Rezende
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Abstract

With a great potential yet to be explored in Brazil, the grid-connected photovoltaic system, besides supplying the active power, can also contribute to improve the voltage level grid providing reactive power. Therefore, this work proposes to use a Grid-Connected Photovoltaic System (GCPVS) equipped with a control that uses the automatic voltage regulator (AVR) to balance the injection of the active and reactive powers, thus softening the short-duration voltage variation, more specifically the momentary voltage dip. For this purpose, the GCPVS was connected in part of a real distribution grid that attend the block 1106 South of Palmas city, state of Tocantins, northern region of Brazil. It is shown that the active and reactive power delivered to the grid can be controlled to help the power quality of the main grid during a disturbance. During a short-circuit situation, the active power is reduced, freeing up space from the inverter capacity for maximum supply of reactive power, in this way, helping the main grid to return to an adequate voltage level. The simulation results show that such voltage profile improvement is possible. Therefore, they confirm that photovoltaic systems, even though considered small, can also provide ancillary services to the low voltage distribution grid during abnormal conditions, adding to the actions normally performed by conventional power plants
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基于有功功率与无功功率平衡的并网光伏系统瞬时电压陡降缓解方案
巴西光伏并网系统在提供有功电力的同时,还可以提高电网无功电压水平,具有很大的发展潜力。因此,本研究提出在并网光伏系统(GCPVS)中安装自动电压调节器(AVR)来平衡有功功率和无功功率的注入,从而软化短时电压变化,更具体地说,是瞬间电压下降。为此,GCPVS作为一个真正的配电网的一部分连接到巴西北部地区Tocantins州帕尔马斯市南部1106街区。结果表明,在电网出现扰动时,可以通过控制输送到电网的有功和无功功率来改善主电网的电能质量。在短路情况下,有功功率减少,从逆变器容量中腾出空间,最大限度地提供无功功率,从而帮助主电网恢复到适当的电压水平。仿真结果表明,这种电压分布改善是可能的。因此,他们证实,光伏系统,即使被认为很小,也可以在异常情况下为低压配电网提供辅助服务,增加传统发电厂通常执行的行动
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来源期刊
Acta Scientiarum-technology
Acta Scientiarum-technology 综合性期刊-综合性期刊
CiteScore
1.40
自引率
12.50%
发文量
60
审稿时长
6-12 weeks
期刊介绍: The journal publishes original articles in all areas of Technology, including: Engineerings, Physics, Chemistry, Mathematics, Statistics, Geosciences and Computation Sciences. To establish the public inscription of knowledge and its preservation; To publish results of research comprising ideas and new scientific suggestions; To publicize worldwide information and knowledge produced by the scientific community; To speech the process of scientific communication in Technology.
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