Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Vera Novakova Zachovalova"'
Autor:
Vera Novakova Zachovalova, Martin Šíra
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 64:1350-1354
Nonintrusive load meters (NILMs) with a load identification ability have been developed in several institutes and companies. All load identification algorithms (LIAs) have a common characteristic: load identification is based on the current waveform.
Autor:
Vera Novakova Zachovalova
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 63:1620-1627
This paper describes mathematical modeling of cage-type ac current shunts. A calculable model was developed using lumped circuit elements. The transimpedance, ac–dc difference, and the phase angle error of a shunt can be derived from the model. An
Publikováno v:
2016 Conference on Precision Electromagnetic Measurements (CPEM 2016).
A new software toolbox QWTB is presented. It aims for aggregation of high-quality algorithms required for data processing of sampled measurements. Algorithms include frequency, amplitude and phase estimators, stability quantifiers, flicker calculator
Publikováno v:
2016 Conference on Precision Electromagnetic Measurements (CPEM 2016).
This paper describes a simple, affordable and easily replicable 10 Ω resistance standard with calculable frequency dependence and time constant. The resistor is a bifilar type made from an enameled manganin wire. A time constant of 6.05 ns with unce
Publikováno v:
2016 Conference on Precision Electromagnetic Measurements (CPEM 2016).
This paper describes an investigation of single junction thermal converters (SJTC) resulting in development of a primary standard of ac-dc current difference. Frequency characteristic of the primary standard was determined by special measurement meth
Publikováno v:
2016 Conference on Precision Electromagnetic Measurements (CPEM 2016).
This paper describes a universal digital sampling setup for measurement of a complex voltage ratio. The setup was primarily designed for calibration of a phase angle error of current shunts, but it can be used for calibration of wide range of impedan
Publikováno v:
2016 Conference on Precision Electromagnetic Measurements (CPEM 2016).
This paper describes a construction of the high current shunts of cage design up to 100 A based on known model. Investigation of dependence of their dc resistance and frequency characteristic on current level is presented and followed by improvement
Autor:
Domenico Giordano, Vera Novakova Zachovalova, Gabriella Crotti, Martin Šíra, Stanislav Maslan
Publikováno v:
2016 Conference on Precision Electromagnetic Measurements (CPEM 2016).
The Phasor Measurement Unit (PMU) simulator is presented in this paper. The aim of the simulator is to calculate the uncertainty of a PMU by means of the Monte Carlo method. A whole measurement chain is modeled in the simulator, including a transduce
Publikováno v:
2016 Conference on Precision Electromagnetic Measurements (CPEM 2016).
This paper describes digital sampling bridge for impedance measurement up to few tens of kHz in four terminal pair definition. It is primarily dedicated for low impedance measurements with comparison currents over 10 A however it can be used at least
Autor:
K. Lind, Umberto Pogliano, Bostjan Voljc, Vera Novakova Zachovalova, M. Garcocz, Valter Tarasso, G.C. Bosco, Gert Rietveld
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 60:2359-2365
A comparison of the phase error of existing shunts for currents between 10 and 100 A and frequencies from 500 Hz to 100 kHz has been organized. Measurement processes were performed at Istituto Nationale di Ricerca Metrologica on some shunts using the