{"title":"Impacts of power quality events on supplying loads in an experimental open structure DC nanogrid under different operating conditions","authors":"","doi":"10.1016/j.epsr.2024.111082","DOIUrl":null,"url":null,"abstract":"<div><p>This paper presents an experimental study on Power Quality (PQ) using indicators to assess the impact on loads supplied by a Low Voltage Open Structure Direct Current Nanogrid (LVOSDCN) utilizing off-the-shelf equipment and passively regulated in 24 V, implemented in real scale in the Amazon Region. Four tests were performed to evaluate the regular occurrence of PQ events with different irradiance profiles and commercial loads. The characteristics of the distribution grid, measurement instruments, and load groups are presented. As a result, variations in RMS voltage under the influence of the irradiance profile reach values above 1.1 PU with a duration of over 1 min, causing failures in some loads. Oscillatory transient events, resulting from the activation of DC-DC converters with time below a few milliseconds, without causing impacts. Finally, the evaluation of voltage ripple using the RMS ripple factor showed maximum values close to 5 %, with different magnitudes over time and at different points of the distribution grid, also having an increase in circulating non-active power. These results are important because the operation of the real scale nanogrid and experimental setup show the magnitudes at which these events can cause failures or damage to the loads supplied by this system.</p></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378779624009672/pdfft?md5=f2fb50c2b7ffe245f0b6835616f02d2c&pid=1-s2.0-S0378779624009672-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electric Power Systems Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378779624009672","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents an experimental study on Power Quality (PQ) using indicators to assess the impact on loads supplied by a Low Voltage Open Structure Direct Current Nanogrid (LVOSDCN) utilizing off-the-shelf equipment and passively regulated in 24 V, implemented in real scale in the Amazon Region. Four tests were performed to evaluate the regular occurrence of PQ events with different irradiance profiles and commercial loads. The characteristics of the distribution grid, measurement instruments, and load groups are presented. As a result, variations in RMS voltage under the influence of the irradiance profile reach values above 1.1 PU with a duration of over 1 min, causing failures in some loads. Oscillatory transient events, resulting from the activation of DC-DC converters with time below a few milliseconds, without causing impacts. Finally, the evaluation of voltage ripple using the RMS ripple factor showed maximum values close to 5 %, with different magnitudes over time and at different points of the distribution grid, also having an increase in circulating non-active power. These results are important because the operation of the real scale nanogrid and experimental setup show the magnitudes at which these events can cause failures or damage to the loads supplied by this system.
期刊介绍:
Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview.
• Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation.
• Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design.
• Substation work: equipment design, protection and control systems.
• Distribution techniques, equipment development, and smart grids.
• The utilization area from energy efficiency to distributed load levelling techniques.
• Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.