Shanshan Ma, Da Lu, Yubo Yang, Jing Wang, Xuewei Wang
This paper is concerned with the influence of the dynamic error of smart electricity meter (hereinafter referred to as smart meter) in the condition of dynamic current. Firstly, the random fluctuation of the dynamic load current amplitude is analysed and two typical run lengths are found out. Secondly, dynamic models of every unit in the smart meter are established. These models reflect the dynamic transfer relationship between the input and output signals of every unit. Thirdly, the dynamic errors of smart meter are simulated and analysed in the condition of dynamic current with typical run...
Meng Zhu, Da Lu, Yubo Yang, Jing Wang, Xuewei Wang
With the widely use of non-linear electrical equipment , the load signal in the smart grids exhibits distortion and dynamic characteristics. Simultaneously, non-integer-period sampling is inevitable in the power and energy estimation of the smart meter, which brings errors to the energy accumulation. In this paper, firstly, a new window is proposed based on the traditional filter power measurement algorithm and the frequency characteristics of the window are analyzed. Then, based on the window and structured model of smart meter, a new active power measurement algorithm is proposed. And...
Jianhua Li, Xueshen Wang, Pingwei Lin, Xinhua Chen, Longfa Zhang, Shuo Liu
This paper reported a research on conducting tin-doped indium oxide (ITO) films fabricated by dc magnetron sputtering for transparent heating. ITO films with a thickness of 130 nm were deposited on BF33 glass substrates, followed by an annealing process in N 2 atmosphere for 2 h at 450 ?. The crystal structure, surface morphology, optical and electrical properties of ITO films were characterized. The predominant crystal face orientation was (222). The transmittance from 400 nm to 800 nm was 92.5%. The sheet resistance and resistivity increased, and the temperature coefficient of resistance...
Xueshen Wang, Jinjin Li, Yuan Zhong, Qing Zhong
Nano-SQUIDs are sensitive devices for quantum detection and precision measurements due to the ultra-low noise level. This paper reports the fabrication and characterization of nano-SQUIDs fabricated by e-beam lithography and reaction ion etching (RIE). The Nano-SQUIDs were comprised by two Dayem nanobridges and a loop based on the monolayer Nb film. The width of the nanobridges was 94 nm and the diameter of the loop was 20 µm. A measurement system based on a physical properties measurement system and source-meters. The voltage-bias current ( I bias - V ) properties at different temperatures...
Damiano Crescini, Alessio Galli, Davide Alghisi, Farid Touati
Capillary wireless sensor networks dedicated to air quality monitoring have provided essential information on hazardous air condition, generating early warnings to prevent danger situation for human health. The main challenge of capillary networks is the adoption of environmentally generated energy as primary and/or unique energy source instead of the replacement of hundreds or even thousands of batteries on a regular basis that leads to high costs and practical problems of devices management. We present in this paper a battery-less, autonomous, multi-parametric sensing platform for air...
O. Velychko, S. Karpenko
SE "UKRMETRTESTSTANDARD" provided and carried out the interlaboratory comparison (ILC) as reference measurements provider for all Ukraine accredited calibration laboratories (CL’s) for electric power (EP) measurements at industrial frequency. This paper presents the assessment of CL’s which participated at ILC within EP measurements at industrial frequency. The main goal of this ILC was the assessment of CL’s capabilities that perform calibration in EP measurement.
Oleh Velychko, Tetyana Gordiyenko
The global metrological traceability fully depends on the implementation of international mutual recognition agreements in field of metrology. The linked results of international comparisons of national standards and national inter-laboratory comparison for AD/DC voltage transfer difference measurements was presented.
Jakub Svatos, Jan Holub
To reduce the construction costs and to increase energy savings and the indoor environmental quality in a woodhouse, an energy consumption measuring system for diagnostics of thermal and technical properties of buildings envelope is introduced. At present, the vast majority of calculations for the thermal and technical characteristics of buildings are based on simple mathematical models of building envelope behaviour derived primarily from the thermal conductivity of individual materials. However, the thermal conductivity is measured in a stable laboratory environment. Therefore, the...
Piotr Bilski
The paper presents the application of the combined group of regression algorithms to identify state of the analog circuit. Implementing the fusion of regression machines is aimed at obtaining high accuracy of the diagnosed system’s state, especially compared to the single parameter identification algorithm. The large number of simple methods (such as linear regression techniques) is expected to give the high accuracy without the need of time consuming and complex optimization of the selected approach (such as Support Vector Machines – SVM). The approach consists in preparing the ensemble...
TC10 Conference 2019
· TC10
· 2019
· Download
Weiqiang Zhao, Eduard Egusquiza, Carme Valero, Mònica Egusquiza, David Valentín, Alexandre Presa
Due to the entrance of new renewable energies, water-storage energy has to be regulated more frequently to keep the stability of power grid. Consequently, pump-turbines have to work under off- design conditions more than before, which will cause more damage and decrease their useful life. Advanced monitoring methodologies that can balance the degradation of machine and revenues to the power plant has been required. To develop an innovative condition monitoring approach, vibration data was collected from different components of a pump-turbine which is running in an extended operating range....
TC10 Conference 2019
· TC10
· 2019
· Download