scholarly journals The New Brazilian Power Quality Standard and a Low Cost Device Meter

2012 ◽  
Vol 04 (03) ◽  
pp. 144-152
Author(s):  
Guilherme P. Colnago ◽  
Jose L. F. Vieira ◽  
Gilberto C. D. Sousa ◽  
Jose R. Macedo Jr.
Keyword(s):  
Power Quality ◽  
Low Cost ◽  
Quality Standard

Low-Cost NB-IoT Microgrid Power Quality Monitoring System

2021 ◽  
Author(s):  
Dmitry Petrov ◽  
Konstantin Kroschewski ◽  
Ibrahim Mwammenywa ◽  
G. Mark Kagarura ◽  
Ulrich Hilleringmann
Keyword(s):  
Power Quality ◽  
Monitoring System ◽  
Low Cost ◽  
Quality Monitoring ◽  
Power Quality Monitoring

scholarly journals Evaluation of Residents’ Satisfaction with Building Features in Some Public Housing Estates in Benin City, Nigeria

2019 ◽  
Vol 8 (2) ◽  
pp. 117-125
Author(s):  
Kingsley Okechukwu Dimuna ◽  
Abiodun Olukayode Olotuah
Keyword(s):  
Low Cost ◽  
Quality Standard ◽  
Housing Quality ◽  
Benin City ◽  
Neighbourhood Satisfaction ◽  
Level Of Satisfaction ◽  
Acceptable Quality ◽  
The Family ◽  
Housing Estates

Abstract Residential and neighbourhood satisfaction are important indicators of housing quality and conditions which affect individual’s quality of life. This study which was conducted in 2018 evaluated the level of satisfaction in terms building features in six completed and occupied housing estates in Benin city, namely the federal owned estate at Ikpoba hill, and state owned housing estates located at Ugbowo, Oregbeni, Oluku, Evboriaria and Iyekogba. Data were collected from 1000 heads of households and analysed using descriptive statistical tools, categorical regression and factor analyses. The findings showed that the building features significantly affect the level of resident’s satisfaction. The RSI scores for the relatively old estates; EDPA, Ikpoba hill and Oregbeni and are on the dissatisfied region (RSI: 1.1-2.00) while for the relatively newer ones; Andrew Wilson and Oluku, the RSI scores are on the satisfied level (RSI=. 3.1-4.00) with building features features. The study recommends that the design for future low cost housing should consider the family sizes of average Nigerian family, kitchen design that make use of cooking gas, kerosene and outdoor kitchen possible. The paper concludes that the buildings should maintain an acceptable quality standard in terms of functional spaces, structural stability and aesthetics as this will result to resident's housing satisfaction.

scholarly journals Evaluating Pfeiffer Chromatography for Its Validation as an Indicator of Soil Quality

2020 ◽  
Vol 8 (3) ◽  
pp. 420
Author(s):  
Igor Graciano ◽  
Leopoldo Sussumu Matsumoto ◽  
Gilberto Bueno Demétrio ◽  
Erika Cosendey Toledo Mello Peixoto
Keyword(s):  
Production Systems ◽  
Sodium Hydroxide Solution ◽  
Low Cost ◽  
Central Zone ◽  
Principal Component ◽  
Quality Standard ◽  
Soil Extract ◽  
Soil Monitoring ◽  
Internal Medium ◽  
Physical Chemical

Soil monitoring is fundamental to promote sustainability agroecosystems. It is necessary to consider indicators that bring together biological, physical, chemical and inter-relational attributes. Pfeiffer chromatography (PC) represents an important method for soil diagnosis, so the present study aims to analyze it in order to contribute to its validation. The soil samples of 12 production systems were evaluated in quintuplicate. The chromas were elaborated using Whatman no 4 filter paper, and the soil extract was performed by sodium hydroxide solution 1%. The results were obtained using revealing solution (AgNO3 0.5%) ascension by capillarity, and the chrome zones: central, internal, medium and external were correlated to soil penetration, chemical, biological and enzymatic parameters, respectively. Variance analysis was applied to the results that presented normal distribution and the means were compared by Scott-Knott test. T-test for Spearman correlations and principal component analysis were used to evaluate the correlations. There was negative correlation between the central zone and the average penetration resistance within the range 0-40 cm in depth. The internal, medium and external zones presented positive correlation with organic matter, carbon microbial biomass, and enzymatic activities, respectively. Quality standard features such as coloration, size and proportion of zones, presence of enzymatic clouds, peaks and radial lines were also confirmed. Thus, the standardization developed by this study contributed to validation of PC. Since PC is a low-cost and easy-to-perform method, it proves to be a useful tool allowing farmers autonomy to monitoring different agricultural systems, contributing to their production sustainable.

scholarly journals PQ and Harmonic Assessment Issues on Low-Cost Smart Metering Platforms: A Case Study

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6361
Author(s):  
Giovanni Artale ◽  
Giuseppe Caravello ◽  
Antonio Cataliotti ◽  
Valentina Cosentino ◽  
Dario Di Cara ◽  
...  
Keyword(s):  
Power Quality ◽  
Feasibility Study ◽  
Low Voltage ◽  
Low Cost ◽  
Distribution Networks ◽  
Smart Metering ◽  
Energy Metering ◽  
Instrument Transformers ◽  
The Impact

This paper presents a feasibility study on how to implement power quality (PQ) metrics in a low-cost smart metering platform. The study is aimed at verifying the possibility of implementing PQ monitoring in distribution networks without replacing existing smart metering devices or adding new modules for PQ measurements, thus zeroing the installation costs. To this aim, an electronic board, currently used for remote energy metering, was chosen as a case study, specifically the STCOMET platform. Starting from the specifications of this device, the possibility of implementing power quality metrics is investigated in order to verify if compliance with standard requirements for PQ instruments can be obtained. Issues related to device features constraints are discussed; possible solutions and correction algorithms are presented and experimentally verified for different PQ metrics with a particular focus on harmonic analysis. The feasibility study takes into account both the use of on-board voltage and current transducers for low voltage applications and also the impact of external instrument transformers on measurement results.

A Low-cost Smart Plug with Power Quality and Energy Analyzer Features

2019 ◽  
Author(s):  
Tiago M. Serrano ◽  
Luiz C. P. da Silva ◽  
Leandro Pereira ◽  
Feliphe Andreoli ◽  
Tuo Ji ◽  
...  
Keyword(s):  
Power Quality ◽  
Low Cost ◽  
Energy Analyzer
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