Author
Tomas Wittassek
Bio: Tomas Wittassek is an academic researcher from Technical University of Ostrava. The author has contributed to research in topics: Instrumentation (computer programming) & Phasor. The author has an hindex of 2, co-authored 2 publications receiving 5 citations.
Papers
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01 Sep 2011
TL;DR: National Instruments® (NI) pioneered virtual instrumentation more than 25 years ago with the introduction of LabVIEW — fully graphical development system and on several platforms they offer software products that deliver the proven productivity gains ofvirtual instrumentation.
Abstract: National Instruments® (NI) pioneered virtual instrumentation more than 25 years ago with the introduction of LabVIEW — fully graphical development system. On several platforms they offer software products that deliver the proven productivity gains of virtual instrumentation. Over twenty years at the Department of Measurement and Control VSB — Technical University of Ostrava the students have taken advantage of the flexibility and open development model to solve applications in a wide variety of cases. Computer laboratories equipped by flexible hardware components make education and research cheaper and more productive and improve the way students learn. Rather than focusing on sometimes tedious methods of software development for gathering data, educators and students can focus on results and concepts. Students still learn methodology, but spend the majority of their time executing their experiments instead of building them.
3 citations
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TL;DR: The PMU (Phasor Measurement Unit) is used for accurate measurement of synchronous phasor of voltages and currents based on synchronous Phasor continuous measurement at the different location of distribution network is possible prevent fault which can cause blackout Synchronous phaseor measurement is described in IEEE C37118-2005 standard.
Abstract: The PMU (Phasor Measurement Unit) is used for accurate measurement of synchronous phasor of voltages and currents Based on synchronous phasor continuous measurement at the different location of distribution network is possible prevent fault which can cause blackout Synchronous phasor measurement is described in IEEE C37118-2005 standard The IEEE C37118-2005 is primarily focused on communication with the PMU and precision of the measurement at steady state PMU manufacturers declare compliance with IEEE C371182005, which doesn't mean correct behaviour of the PMU for dynamic changes in the power network The new standard for the PMU is currently developing This standard should contain both the issues included in IEEE C37118-2005 and description of PMU testing in connection with dynamic changes in power network This article deals with the implementation of tests for testing the dynamic properties of PMU These tests are conducted by tester, which was designed and implemented based on virtual instrumentation The results of several tests of commercial PMUs are presented in the article (4 pages)
2 citations
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TL;DR: The real-time education and research platform is presented with seven experiments that provide the various concepts of these courses for different state-of-the-art wireless and digital communications techniques such as signal detection, data modulation, frequency, phase offset estimation, etc.
Abstract: The paper presents the real-time education and research platform as an effective means for describing wireless and digital communications courses with Wi-Fi standards. To this end, a Real-Time Wi-Fi Laboratory platform, called RTWiFi-Lab is designed and implemented as part of these courses using NI USRP 2921 and LabVIEW. Laboratory experiments of these courses give benefits for utilizing a hardware platform since these experiments greatly facilitate the understanding of significant effects introduced by real-time receivers. Hence, this platform is presented with seven experiments that provide the various concepts of these courses for different state-of-the-art wireless and digital communications techniques such as signal detection, data modulation, frequency, phase offset estimation, etc. The RTWiFi-Lab has been considered to provide computer engineering undergraduate students and qualified graduate students with the basic introduction to wireless and digital communications concepts in a short time at Kocaeli University, Turkey.
13 citations
TL;DR: The VI generates a Routh-Hurwitz array for analyzing system stability based on obtaining the characteristic D (s) equation and is able to identify situations where there is a space or row of zeros within the array.
Abstract: This paper describes the design of a virtual instrument (VI) to analyze stability in control systems implemented in LabVIEW virtual instrumentation software. The VI generates a Routh-Hurwitz array for analyzing system stability based on obtaining the characteristic D (s) equation and is able to identify situations where there is a space or row of zeros within the array. Furthermore, the VI shows the graphical location of the poles and zeros of the transfer function in closed loop, the graphical system response to a unitary step input and peak time, overshoot, settling time and peak value of the step response. Finally a case study on a DC-DC buck type converter operating in continuous and discontinuous conduction is reviewed.
4 citations
01 May 2019
TL;DR: A simple reconfigurable hardware prototype is proposed that provides a fast, time-synchronous and efficient way to perform all the compliance tests on the PMU under investigation and is carried out using National Instruments' Compact RIO family of reconfigured hardware.
Abstract: Pre-compliance tests are intended to be used to assess Phasor Measurement Unit(PMU)s' performance during their design and implementation before sending them for certification or using them for grid dynamic measurements. Methodologies for pre-compliance testing of PMUs based on the dynamic requirements of the IEEE C37.118.1-2014 standard are discussed and reported in recent literature. However, these tests are mostly performed through software simulations and there are limited test-hardwares available. To address this issue, a simple reconfigurable hardware prototype is proposed in this paper. The implementation is carried out using National Instruments' Compact RIO family of reconfigurable hardware and it provides a fast, time-synchronous and efficient way to perform all the compliance tests on the PMU under investigation.
2 citations
01 Nov 2018
TL;DR: Developing a virtual instrument that performs real-time video recording to replace existing DVR hardware that will be implemented in surveillance systems and to employ the analog-to-digital conversion for the multiplexing of the analog input signal coming from the CCTV camera as well as Python programming language was utilized.
Abstract: This paper is all about developing a virtual instrument that performs real-time video recording to replace existing DVR hardware that will be implemented in surveillance systems and to employ the analog-to-digital conversion for the multiplexing of the analog input signal coming from the CCTV camera as well as Python programming language was utilized.
TL;DR: In this paper, the authors presented the calculation of power system steady stable parameters in real time using a PMU prototype with FPGA technology for monitoring, control and protection of electrical system using a user-friendly interface.
Abstract: In the Ecuadorian electrical system the high electricity transfers have had in more than one occasion instability, so the use of new technologies based on PMUs is a solution to address these drawbacks. This article presents the calculation of power system steady stable parameters in real time using a PMU prototype with FPGA technology for monitoring, control and protection of electrical system using a user-friendly interface.