Renewable energy & power quality journal最新文献_第7页

Characterization of the effect of pyrolysis in torrefied wood chips 热解对碳化木屑影响的表征

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/REPQJ16.371

L. Nunes, R. Godina, J. Matias, J. Catalão

{"title":"Characterization of the effect of pyrolysis in torrefied wood chips","authors":"L. Nunes, R. Godina, J. Matias, J. Catalão","doi":"10.24084/REPQJ16.371","DOIUrl":"https://doi.org/10.24084/REPQJ16.371","url":null,"abstract":"The pyrolysis behavior of torrefied wood produced in Portugal was investigated. Torrefaction is the thermochemical upgrading of biomass at approximately 300oC in an atmosphere free of oxidizing agents to increase fuel density and to improve fuel quality, decreasing moisture and increasing heating value. Torrefied woodchips were pyrolysed at pressurized conditions in an inert atmosphere at 600oC. All the condensable liquids were sampled for analyses. All pyrolysis hydrocarbon liquids were analysed using simulated distillation (simdis) and gas chromatography mass spectrometry (GCMS). Torrefied wood hydrocarbon liquid showed higher concentrations of aliphatic aldehydes liquid. A decrease in all the other molecular components was observed for the torrefied wood hydrocarbon liquid. The main organic components in the torrefied wood pyrolysis water fractions were acids, alcohols and aliphatic oxygenates. Torrefied wood pyrolysis water exhibited a significantly lower acid concentration when compared to nontorrefied wood pyrolysis water. The biomass chars (prepared at 600oC) were analysed using proximate analyses and carbon dioxide char reactivity. Proximate analyses showed that volatile matter was still present in the torrefied wood, but was almost completely devolatilized after pyrolysis.","PeriodicalId":21007,"journal":{"name":"Renewable energy & power quality journal","volume":"42 1","pages":"516-521"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76273266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Proposal to Evaluate the Potential of Biogas and Lifetime of Landfills for the Production of Electrical Energy 评估沼气在堆填区产生电能的潜力及寿命的建议

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/repqj16.201

M. N. Goncalves, Matheus Ribeiro Martins, J. Camacho

引用次数: 1

Modeling of a New Super-Gain BJT and an innovative Low-loss AC Switch based on Gummel-Poon model 基于Gummel-Poon模型的新型超增益BJT和创新型低损耗交流开关建模

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/repqj16.390

Z. Ren, J. Wang, P. Schellmanns, N. Batut, G. Goubard

引用次数: 0

Nontechnical Loss Detection for Metered Customers in Alexandria Electricity Distribution Company Using Support Vector Machine 基于支持向量机的亚历山德里亚配电公司计量用户非技术损耗检测

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/repqj16.353

Hatem Tameem Alfarra, Maritime Transpotation Aastmt. Egypt, A. Attia, C. S. M. E. Safty

{"title":"Nontechnical Loss Detection for Metered Customers in Alexandria Electricity Distribution Company Using Support Vector Machine","authors":"Hatem Tameem Alfarra, Maritime Transpotation Aastmt. Egypt, A. Attia, C. S. M. E. Safty","doi":"10.24084/repqj16.353","DOIUrl":"https://doi.org/10.24084/repqj16.353","url":null,"abstract":"Non-technical losses (NTL) during transmission and distribution (T&D) of electrical energy is a major problem faced by utility companies which is very difficult to fight and detect. For that, more of power utilities spend thousands dollar for research centres to find efficient methods for detecting and controlling abnormalities. Electricity theft and billing irregularities forms the main portion of NTL. With the introduction of smart meter, the frequency of reporting energy consumption data to the utility company has been increased. Incoming and outgoing energy could be monitored and analyzed. Electricity theft is a complex problem with many parameters to be evaluated before implementing any measures to detect and control that. These parameters include some issues like social, economic, regional, managerial, infrastructural, and corruption. In recent years, several data mining and research studies on fraud detection and prediction techniques have been carried out in the electricity distribution sector. Support vector machine (SVM) technique has dominated the research for classifying data and detecting fraudulent electricity customers. SVM technique has good ability in data mining and data classification. The paper objective is to analyze the metered energy consumption data recorded and predict the pattern or the form of daily user’s energy consumption, then using SVM to classify the data whether normal or theft. The suggested technique is then tested using real data from Alexandria Electricity Distribution Company (AEDC). The proposed technique was able to distinguish between healthy and theft cases.","PeriodicalId":21007,"journal":{"name":"Renewable energy & power quality journal","volume":"38 1","pages":"468-474"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86964004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

EDP Serviço Universal’s energy market performance EDP服务公司的能源市场表现

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/REPQJ16.269

A. Taborda, Sa. Coimbra. Portugal Edp Servico Universal, P. Andrade

引用次数: 0

Potential benefits of distributed generation in the reduction of non-technical losses 分布式发电在减少非技术损失方面的潜在好处

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/repqj16.208

Eduardo Baffi, Comptroller-General Brasília. Brazil, Rafael Martin Lamaison Urioste, M. Peñalba

引用次数: 1

Voltage Sourced Converter (VSC) based on multiple FACTS controllers for the improvement of power quality 基于多个FACTS控制器的电压源变换器(VSC)用于改善电能质量

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/REPQJ16.213

S. A. Mohamed, N. Luo, T. Pujol, L. Pacheco

引用次数: 7

A 380 V High Efficiency and High Power Density Switched-Capacitor Power Converter using Wide Band Gap Semiconductors 一种380 V高效率、高功率密度宽禁带半导体开关电容功率变换器

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/REPQJ16.422

L. Fan, A. Knott, I. Jørgensen

引用次数: 4

Using ANFIS to Predict Harmonic Distortion in Residential Building Loads: A case study in the Amazonian Region of Brazil 应用ANFIS预测住宅建筑荷载谐波畸变:以巴西亚马逊地区为例

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/REPQJ16.291

Albino Moisés Faro de Morais Junior, M. Tostes, U. Bezerra, T. M. Soares

引用次数: 0

Measurement of the Current-Voltage Curve of Photovoltaic Cells Based on a DAQ and Python 基于DAQ和Python的光伏电池电流-电压曲线测量

Renewable energy & power quality journal Pub Date : 2018-04-01 DOI: 10.24084/REPQJ16.223

I. Reyes-Ramírez, Unidad Profesional Interdisciplinaria en Ingeniería y Tec México, J. Fonseca-Campos, J. L. M. Machuca

引用次数: 0