Bodan Velkovski, Marija Markovska, Zivko Kokolanski, Vladimir Dimchev, Dimitar Taskovski
This paper presents the metrological evaluation of a proposed virtual power quality (PQ) disturbance generator. The calibration and measurement uncertainty estimation procedures for the RMS voltage and frequency of the generator are explained in detail and the obtained results are presented and discussed. The results show that the measurement uncertainty of the PQ disturbance generator for all reference points is satisfactory, making it suitable for generation of PQ signals for research purposes, especially in the development, testing and improvement of PQ event classifiers.
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.20
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Kiril Demerdziev, Vladimir Dimchev
Harmonic distortion of electrical waveforms results in a need for instrumentation performance evaluation in non-sinusoidal conditions. This is especially challenging in case of power and/or energy measuring devices, because of their place in the regulated trade of electrical energy. The measurement uncertainty evaluation procedure commences with determination of influence factors, which are correlated to harmonic components’ magnitude and phase shift recording. For overall uncertainty budget modelling, a GUM based approach is implemented. The model validation and the uncertainty propagation,...
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.19
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C. Simões, A. S. Ribeiro, M. C. Almeida, D. Covas
This study applies a Monte Carlo method (MCM) to estimate the uncertainty related to the determination of the annual flow duration curve determined at a river weir, considering the dynamic behaviour of processes and the intrinsic uncertainty contributions to the raw data. The computation of the curve uses a time series of average daily flow data collected at a hydrometric station at an upstream river section. This curve was used for a hydropower plant feasibility study. Results show how model uncertainty can be estimated from the measurement uncertainty of raw data and mathematical...
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.18
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M. Aleksic, M. Bjelic, M. Dolinic
This paper describes a comparative overview of different methods of surface plates flatness calibration in the accredited Calibration Laboratory MAGAT Tech. A parallel analysis of methods, together with calculation of the measurement uncertainty, will be presented in detail in this paper. The conclusion of the paper refers to the authors position for the application of the most suitable calibration method of surface plates used in industry, taking into account the measurement uncertainty of calibration and the statement of conformity, in accordance with the level of risk and the requirements...
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.17
· Download
Omar-Jair Purata-Sifuentes, Luis-Eduardo Hernández-Balandrán, Mirna-Guadalupe Tornero-Navarro
The guard banding approach is tested to meet the NLGI grade of lubricating grease specifications. Different guard band formulae were tried to compare the customer and manufacturer risks during production release testing. The results show that the called risk management approach for guard banding offers the best results for the trade-off between the producer risk without compromising the targeted level of consumer risk for the particular case of symmetrical but high-preferred specifications limits.
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.16
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Elvia-Andrea Purata-Funes, Omar-Jair Purata-Sifuentes, Luis-Armando Torres-Pérez, Ramón Navarrete-Reynoso
The guard banding approach is tested to meet the legal requirements for NAWIs. Different guard band multipliers were tried to compare the customer and manufacturer risks when initial and subsequent verification or service inspection were done. The results show that the producer’s risk is always greater than the customer’s risk, no matter if the metrological control is for initial and subsequent verification or service inspection.
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.15
· Download
Haris Memić, Zijad Džemić, Jasmin Kevrić, Dejan Jokić
In this paper, the possibilities and important factors that can influence the prediction of the life time (life cycle) of a measuring instrument used in the field of legal metrology, which is found in everyday work and in different working conditions, are considered. Based on the measurement history and a large number of measurement results data, significant factors (history of measurements, different provider of services, measurement uncertainty and environmental conditions) that can influence the judgment of the life cycle of the measuring instrument were analysed. The presented results...
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.14
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Tzvetelin Gueorguiev
The purpose of this paper is to outline the advantages of integrating quality management systems with innovation management systems. The paper presents the chronology of ISO standards for management systems, the evolution from quality management systems based on ISO 9001 to innovation management systems based on ISO 56002. The discussion evolves into a summary of the lessons learned from the implementation of such systems. The conclusions highlight a number of opportunities for improvement and suggestions for practical implementation of innovation management systems in universities.
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.13
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Szabolcs Benedek
The spreading of photovoltaic (PV) systems as solar panels can be seen around the entire world. The product authorisation and validation process in the case of standard size roof solar panels is a wellestablished practice, however there are an endless variety of non-standard size PV panels. The validation of such units is not always a standard and straightforward procedure, as it is not always clear whether a PV panel is an electrical device or a building material. This paper discusses a possible methodology of the validation of non-standard size PV elements according to the IEC 61215...
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.12
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A. B. Sotirov, B. M. Masheva, C. Tz. Gueorguev
The purpose of the paper is to represent a method for taximeter verification. Taximeters, as special measurement instruments, are subject to metrological control in order to protect the rights of taxi customers. The methodology applied for the theoretical study of the proposed method is derived from Measurement System Analysis, Root Cause Analysis, and similar taximeter verification methods applied in other European countries. The presented method is innovative for Bulgaria and about to be introduces for the need of metrological control.
Joint IMEKO TC11 & TC24 hybrid conference
· TC11
· 2022
· 10.21014/tc11-2022.11
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