Stochastic Measurement of Power Grid Frequency Using a Two-Bit A/D Converter

Radonjić, Aleksandar; Sovilj, Platon; Vujičić, Vladimir

doi:10.1109/tim.2013.2277515

Cited by 20 publications

(15 citation statements)

References 17 publications

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“…Recent results in domain of power measurement [15] expose high accuracy reached with only dual bit A/D converter structure improved with offset error suppression technique. Similar technique is also extended to frequency measurement system [16] where noise immunity creates valuable advantage.…”

Section: Related Workmentioning

confidence: 99%

Acceleration of Digital Stochastic Measurement Simulation Based on Concurrent Programming

Pjevalica¹,

Pjevalica²,

Kaštelan³

et al. 2018

ElAEE

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A/D conversion methods improved through stochastic signal superposition, along with oversampling techniques present significant research direction in the area of signal processing and measurement. Concerning that accuracy of those methods rises with length of measurement interval, i.e. integration time; it turns them appropriate for calculation / measurement of the orthogonal transformations. Simulation and validation of above mentioned digital stochastic methods, requires significant computing resource allocation. Long measurement intervals assigned for processing of numerous arithmetic operations over oversampled input signals presents the most demanding computing requirements. In this paper, a novel digital stochastic measurement simulation approach is presented and validated. Simulation approach is based on Concurrent Programming technique. General orthogonal transformations are analysed through the stochastic measurement technique. As a reference test case Discrete Fourier Transform is calculated over several periodic input signals converted by the stochastic A/D converter. Time required for a simulation test case accomplishment is analysed as a main performance metric. Final results have proven that Concurrent Programming technique improves simulation speed, without other consequences on measurement performance.

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Section: Related Workmentioning

confidence: 99%

Acceleration of Digital Stochastic Measurement Simulation Based on Concurrent Programming

Pjevalica¹,

Pjevalica²,

Kaštelan³

et al. 2018

ElAEE

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“…Frequency measurement using mentioned method is discussed in detail in [9]. Calculation of the error limit is also provided, as well as the assessment of measurement uncertainty which is of the order of 100 ppm.…”

Section: Frequency Measurementmentioning

confidence: 99%

Concept of stochastic measurements in the Fourier domain

Vujičić

Beljic

Sovilj

et al. 2014

2014 16th International Conference on Harmonics and Quality of Power (ICHQP)

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“…They have been introduced in applications of stochastic digital measurement method (SDMM) [6,7] for precise and accurate measurements. The key feature is the simplification of addition, subtraction, multiplication and integration (accumulation) of signals [8,9], which is especially beneficial for measurements in frequency domain.…”

Section: Introductionmentioning

confidence: 99%

“…The key feature is the simplification of addition, subtraction, multiplication and integration (accumulation) of signals [8,9], which is especially beneficial for measurements in frequency domain. Regardless of the resolution of base functions, the mathematical operations are reduced to addition, subtraction and accumulation, performed in integer arithmetic [7]. In other words, the most complex operation -digital multiplication -is completely eliminated.…”

Section: Introductionmentioning

confidence: 99%

Grid fundamental harmonic measurement in presence of Gaussian frequency deviation using 2-bit flash A/D converter

et al. 2017

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Original scientific paper The paper proposes a novel approach to the measurement of the power grid voltage and/or current fundamental harmonic, using stochastic digital measurement method (SDMM) and 2-bit flash A/D converters. The power grid frequency variation in the European interconnection has been found as Gaussian. The influence of the frequency disturbance on the results of fundamental harmonic measurements is examined in detail. As theoretical analyses are extremely complex due to a high nonlinearity and stochastic nature of the problem, simulation analysis is employed as the primary method for fast testing and confirmation of the paper hypothesis. The results of realistic simulations give the measurement uncertainties below 0,01 % and 0,013 %, for the measured grid voltage and current, respectively. Experimental validation has been carried out by comparison of the commercial instrument measurements and the measurements of SDMM based prototype instrument. It has been found that results are in accordance. Keywords: digital measurements; fundamental harmonic measurement; power grid; simulation; stochastic processes Mjerenje osnovnog harmonika u mreži uz prisustvo Gaussovog poremećaja frekvencije uporabom 2-bitnih flash A/D konverteraIzvorni znanstveni članak U radu se predlaže novi pristup mjerenju osnovnog harmonika mrežnog napona i/ili struje, pomoću stohastičke digitalne mjerne metode i 2-bitnih flash A/D konvertera. Utvrđeno je da je varijacija mrežne frekvencije u Europskoj interkonekciji Gaussova. Podrobno je ispitan utjecaj poremećaja frekvencije na rezultate mjerenja osnovnog harmonika. Kako su teorijske analize iznimno složene zbog velike nelinearnosti i stohastičke prirode problema, simulacijska analiza se koristi kao primarna metoda za brzo ispitivanje i potvrđivanje hipoteze rada. Rezultati realističnih simulacija daju mjerne nesigurnosti ispod 0,01 % i 0,013 % za mjerene mrežne napone i struje, respektivno. Provedena je eksperimentalna provjera, usporedbom mjerenja komercijalnog instrumenta i mjerenja prototipa instrumenta koji se temelji na SDMM metodi. Utvrđeno je da su rezultati u skladu.

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Stochastic Measurement of Power Grid Frequency Using a Two-Bit A/D Converter

Cited by 20 publications

References 17 publications

Acceleration of Digital Stochastic Measurement Simulation Based on Concurrent Programming

Acceleration of Digital Stochastic Measurement Simulation Based on Concurrent Programming

Concept of stochastic measurements in the Fourier domain

Grid fundamental harmonic measurement in presence of Gaussian frequency deviation using 2-bit flash A/D converter

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