Tomasz Tarasiuk

Tomasz Tarasiuk
Gdynia Maritime University

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83
Publications
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Publications

Publications (83)
Article
Full-text available
The conventional port distribution power system is being disrupted by increasing distributed generation (DG) levels based on integrated energy. Different new energy resources combine with conventional generation and energy storage to improve the reliability of the systems. Reliability assessment is one of the key indicators to measure the impact of...
Article
Full-text available
This paper discusses contemporary problems concerning ship microgrids. It focuses on the role of power electronics and power quality issues, both conventional, such as voltage and frequency variations, and new issues, such as waveform distortions ensuing from the wide proliferation of power electronics in ship microgrids. The paper also contains a...
Article
Full-text available
This paper deals with new challenges regarding power quality in ship technology resulting from the novelisation and implementation of IACS (International Association of Classification Societies) rules and requirements. These rules, known as IACS E24 2016/2018, address harmonic distortion for ship electrical distribution systems, including harmonic...
Article
Full-text available
The chief aim of the proposed paper is to compare the behavior of supply voltage registered onboard three vessels equipped with high power converters during normal operation. The vessels considered are a chemical tanker with shaft generator working via power converter, a research-training ship with bow thruster, and a research vessel with dynamic p...
Article
Full-text available
All-electric ships (AES) are considered an effective solution for reducing greenhouse gas emissions as they are a platform to use clean energy sources such as lithium-ion batteries, fuel cells and solar cells instead of fossil fuel.Even though these batteries area promising alternative, the accuracy of the battery state of charge (SOC) estimation i...
Article
Full-text available
Fluctuation of frequency is arguably the most characteristic feature of marine microgrids. This concerns both frequency drift during step load change and all quasi-periodic fluctuation due to the impact of various factors like generators' prime movers, the governor's characteristic, and sea conditions. This article aims to provide insight into the...
Article
Full-text available
Ship power systems are characterised by a comparatively high level of various power quality disturbances, such as voltage deviations, frequency deviations, voltage waveform distortions and sometimes voltage unbalance, which exert a detrimental effect on energy receivers. Among other things, power quality disturbances may cause an extraordinary incr...
Article
Full-text available
The reduction of greenhouse gas emissions is a major contemporary challenge. This has prompted the requirements concerning energy efficiency for ships, among other things. Improvement in efficiency of ship operations could be achieved by reducing unnecessary power consumption by induction motors. Specifically, the occurrence of power quality distur...
Article
High power motor loads are widely used in shipboard microgrids (SMGs) consuming about 70% of generated electrical power. Voltage dips, which are usually caused by the starting current of high power motors, are one of the main causes of onboard sensitive electrical equipment dropout. This phenomenon must be considered in design of SMGs to comply wit...
Conference Paper
The article presents the results of experimental research into ship subsystem loaded with nonlinear load (thruster supplied by power electronic converter). The recorded voltages and currents were analyzed for chaotic behavior. Phase trajectories and Poincare maps were determined on the basis of registered samples to identify chaos state.
Conference Paper
Full-text available
The paper presents the experimental results of harmonics measurements in example ship microgrid containing varying nonlinear load, namely high power adjustable speed drive of bow thruster. The research concentrates on voltage harmonics variations caused by the drive load changes from zero up to full load. The aim is to determine local minima (if pr...
Conference Paper
Full-text available
The proposed paper deals with the problem of power quality (PQ) assessment in marine microgrids. Particularly, the problem of voltage and current waveform distortions is considered. The paper’s main aim is experimental assessment of electromagnetic transient program (EMTP) PSCAD model of bow thruster sub-system onboard of example ship. The real sub...
Article
Power quality (PQ) is becoming more and more critical issue in shipboard microgrid systems (SMG). Especially, the impact of voltage unbalance combined with harmonic distortions on the SMG behavior has not been fully investigated. In this paper, simple power quality assessment models and a series of controlled experiments are proposed and carried ou...
Article
Full-text available
At sea, the electrical power system of a ship can be considered as an islanded microgrid. When connected to shore power at berth, the same power system acts as a grid connected microgrid or an extension of the grid. Therefore, ship microgrids show some resemblance to terrestrial microgrids. Nevertheless, due to the presence of large dynamic loads,...
Article
Full-text available
p>The paper presents results of an experimental study of two methods of voltage dip tracking. The first is based on half cycle absolute peak value monitoring, whereas the second is based on low-pass filtration of squares of voltage samples. Both methods are devised for application in low-cost integrated circuits, dedicated to power quality monitori...
Article
Full-text available
The papers in this special section focus on energy conversion in next generation electric ships. These papers bring together papers focused on the recent advancements in energy conversion techniques used in electric ship technologies.
Article
This study presents a simple method for measuring the fundamental reactive power concurrently with the other basic power components defined in IEEE Standard 1459-2010. The method has low hardware requirements and is suitable for implementation in low cost devices, e.g. application-specific integrated circuits (ASICs). The algorithm is based on volt...
Article
The paper is focused on the problem of load sharing between generators running in parallel in ship microgrids loaded by variable-speed drives with power converters. It is based on an experimental study of a number of real cases recorded on three ships. Chosen power quantities defined in the IEEE 1459-2010 standard are calculated, and their sharing...
Article
The aim of this study is to discuss the challenges that will be faced by the designers of measuring instruments in future, in the wake of the proliferation of microgrids. In this context, the fluctuations in the angular frequency of the fundamental component of the voltage and the resulting changes in the duration of the measurement windows are con...
Article
Induction motors are usually considerably oversized and consequently often work inefficiently because of various factors such as the relatively poor voltage quality that is allowed in public and industrial networks. A possible solution is the amendment of power quality rules. This paper presents a preliminary proposal to modify the power quality st...
Article
This paper addresses the problem of electrical power quality and its influence on ship safety. There has been a perceptible increase in the importance of power quality in recent years due to the introduction of new methods for electrical energy production and utilization in ship systems. As a result, new challenges for ship designers, crew members,...
Article
Full-text available
An improved harmonic detection method based on average arithmetic is proposed. According to the research results, the designed solution uses an LPF (low-pass-filter) and a mean value module connected in series instead of the conventional mean value module, and simultaneously, a three-phase voltage phase-locked module instead of commonly used PLL (p...
Conference Paper
The paper is focused on the problem of insufficient synchronization of measurement time window with actual duration of integer number of cycles of input signal and its impact on accuracy of harmonic subgroups measurement. It is analyzed in the wake of chief provisions of IEC Standard 61000-4-7. Particularly, the harmonics order, their phases and th...
Conference Paper
The paper presents results of experimental study of two methods of voltage dip tracking. First is based on half cycle absolute peak value monitoring, whereas second is based on low-pass filtration of squares of voltage samples. Both methods are devised for application in low-cost integrated circuits, dedicated to power quality monitoring. The real...
Conference Paper
Full-text available
The proposed paper is to discuss the problem of accuracy of unbalance factor measurement by discrete Fourier transform (DFT). Particularly, a problem of inappropriate sampling frequency is considered, when signals are sampled non-coherently. The measurement window width and its shape are considered as well. All analyses are based on analytical solu...
Article
The paper’s aim is to describe and discuss the results of an experimental investigation of power quality parameters in exemplary two ships. The measurements have been carried out during the disturbing non-linear loads operation on both vessels. Particularly, the voltage waveform distortions have been considered. In fact, the research has been carri...
Article
The paper deals with measurement and control aspects of active power filtering at ship systems. A main focus of the paper is concentrated on the analysis of the solutions for the improvement of algorithms of compensating current generation. Two aspects of the problem are discussed. Firstly, a choice of an appropriate algorithm focused on hardware a...
Conference Paper
The paper’s aim is to analyze and discuss results of experimental investigation of power quality parameters at two points of exemplary ship power system. Namely, the bus-bars of the main switchboard and terminal of exemplary load (the electric motor of deck crane pump) have been considered. Particularly, measured voltage and frequency deviations ar...
Conference Paper
Full-text available
The paper’s aim is to describe and discuss the results of an experimental investigation of power quality parameters in an exemplary ship. The measurements have been carried out during the disturbing load operation. Particularly, the voltage waveform distortions have been considered, completed by voltage and frequency deviations analysis. In fact, t...
Article
Full-text available
The paper deals with measurement and control aspects of active power filtering in ship systems. The main focus of the paper is concentrated on improvement of harmonic current measurement algorithms based on ip–iq method with application of low-pass filter (LPF) module and, alternatively, on ip–iq method with application of mean value module
Article
Full-text available
The paper is to investigate seemingly a simple problem of THD interpretation in the wake of standards’ definitions and measurement methods. The consequences of application of various definitions of the considered factor are profoundly discussed on the basis of the real voltage waveforms registered in two different ship systems. Particularly, the re...
Article
The paper deals with measurement and control aspects of active power filtering in ship systems. A main focus of the paper is concentrated on improvement of harmonic current measurement algorithms based on ip-iq method with application of LPF module and, alternatively, on ip-iq method with application of mean value module.
Article
Full-text available
This paper presents problems related to transient detection and monitoring in electric power systems. It consists of two parts. Firstly, a problem of frequency characteristic of real impulses is considered. Parameters of the selected transient and notching disturbances are determined after extracting disturbances by pass-band filters with various c...
Article
Full-text available
The paper presents the new instrumentation for power quality assessment, called the estimator–analyzer of power quality. It is consistent with the general idea of waveform parameters measurement set out in IEC Standard 61000-4-7, although it utilizes the authors’ original methods of measurement of power quality parameters. The applied methods and a...
Article
Full-text available
The paper presents a method of estimation of frequency groups with 200Hz bandwidth in the frequency range from the 50th harmonic up to 9kHz. The method consists of the application of a fast Fourier transform (FFT) for wavelet coefficients after input signal decomposition and partial synthesis for chosen frequency bands. It enables the computational...
Article
Full-text available
- The paper presents original methods and algorithms of measurement of power quality parameters which were implemented in a new kind of measurement device called an estimator-analyzer of power quality. The main idea was to overcome the shortcomings of current power quality analyzers, namely their sensitivity to fast fluctuations of input signal par...
Article
In the paper, divided into two parts, a problem of electric power quality assessment in the isolated systems based on the case of ship networks is discussed. Part I is devoted for defining the subject under consideration and presentation of the parameters and legal instruments of the assessment. Part II is addressed to problems of the measurement m...
Article
In the paper, divided into two parts, a problem of electric power quality assessment in the isolated systems based on the case of ship networks is discussed. Part I is devoted for defining the subject under consideration and presentation of the parameters and legal instruments of the assessment. The second part (Part II) is dedicated to the problem...
Article
Full-text available
The paper is to present the new DSP-based device shown in the wake of hitherto development of power quality instrumentation for power quality assessment in ship systems. The motivation of the research is presented and problems of power quality assessment in ship systems is discussed. The basic features of the new power quality estimator–analyser ar...
Article
Full-text available
This paper discusses various methods of calculating coefficients in Fourier series. In particular, the methods recommended in IEC Standard 61000-4-7 and the methods applied in commercial power quality analyzers were investigated. The analysis was carried out for a simulated signal and based on the real voltage registered in an isolated electric pow...
Article
This paper deals with the effect of lowered voltage quality in ship power systems on windings temperature of low-power induction cage machines. The results of investigations carried out with experimental and analytical methods are presented. The thermal impact of power quality disturbances permitted by ship classification societies is discussed. A...
Article
Full-text available
This paper concerns the problem of reliable assessment of a power quality in naval networks. Two aspects of the problem were discussed. Firstly, the parameters for electric power quality assessment and their permissible levels were presented. Further, the methods of their measurement were analyzed. Especially the critical analysis of relevant IEC s...
Conference Paper
Full-text available
Abstract-This paper is focused on the problem of transient and notching recognition. Especially, a problem of frequency characteristic of real impulses are considered. Aim of the paper is to determine a minimum,covered frequency bandwidth, when dealing with this kind of disturbances. Parameters of the selected transient and notching disturbances ar...
Article
One of the features of ship power systems is the presence of different power quality disturbances, such as frequency and voltage root-mean-square (rms) value deviations, unbalance, and voltage waveform distortions. The disturbances (including their synergy) cause an increase in the windings temperature of marine induction machines that are exposed...
Article
Full-text available
This paper deals with the problem of fast recognition of harmonic distortions by means of a wavelet transform. A method of fast detection of a frequency band affected by the high-frequency content and time of its occurrence is described. It is based on the auxiliary waveform distortion band factors (DBFs) calculated on the basis of wavelet coeffici...
Article
This paper is an extended version of the original author’s work presented during XIV IMEKO TC-4 Symposium [T. Tarasiuk, Estimation of measurement window width by interpolation based on wavelet coefficients – case study, in: Proceedings of 14th IMEKO TC-4 International Symposium, Poland, Gdynia/Jurata 2005, pp. 352–357]. Especially, new results have...
Conference Paper
Full-text available
This paper is focused on problems of power quality in systems with varying frequency, equipped with passive harmonics filter. Main differences between the ship system and land network have been pointed out. Influence of varying frequency on proper work of harmonic passive filters frequency change was presented. Simulation circuit and simulations re...
Conference Paper
Full-text available
This paper deals with problems of electric power quality evaluation in ship's network. The measurements of voltage waveform distortion have been carried out on an all electric ship - a research vessel equipped with electric propulsion comprising AC active front end (AFE) drives. The exemplary results of experimental research have been shown and com...
Conference Paper
This paper deals with problem of signals spectrum estimation in systems with varying frequency and harmonic content. The shortcomings of methods described in current IEC standards have been pointed out. Further, the application of chirp-z transform for the aim has been discussed. Especially, its application concurrently with wavelet transform has b...
Conference Paper
Marine induction machines are exposed to different disturbances appearing simultaneously in a ship power system: frequency and voltage rms value deviations, unbalance and voltage waveform distortions. As a result, their windings temperature-rise may reach extremely high level, even if the voltage parameters fulfill the requirements of ship classifi...
Conference Paper
One of the features of ship power systems is presence of different power quality disturbances -frequency and voltage rms value deviations, unbalance and voltage waveform distortions. The disturbances (including their synegry) cause an increase in windings temperature of marine induction machines that are exposed to overheating even if the voltage p...
Article
Full-text available
This paper deals with a problem of fast and reliable waveform disturbances recognition. It means real-time detection and evaluation of different kinds of waveform distortions such as harmonics, interharmonics, as well as transients and notching. In this paper, the problems of sampling frequency, a resulting number of samples and a complementary app...
Conference Paper
This paper deals with the problem of power quality estimation in ship systems during their exploitation stage. The exemplary results of experimental research have been shown and present rules concerning power quality in ship's networks have been discussed. Especially, two methods of THD defining have been compared on the basis of chosen ship voltag...
Conference Paper
Full-text available
This paper concerns the problem of proper evaluation of power quality in naval networks. Two aspects of the problem have been addressed. Firstly, the appropriate choice of power quality parameters for the aim has been discussed. Secondly, the methods of their estimation especially concerning aggregating of measurement intervals have been discussed....
Conference Paper
This paper deals with a problem of fast estimation of waveform distortions by means of Fourier transform as well as wavelet transform. The method of fast recognition of frequency band affected by high frequency content has been described. It has been based on the auxiliary waveform distortion band factors DBF. Merits of presented method as well as...
Conference Paper
This paper deals with the problem of power quality estimation in ship systems during their exploitation stage. The exemplary results of experimental research have been shown and present rules concerning power quality in ship's networks have been discussed. Especially, two methods of THD defining have been compared on the basis of chosen ship voltag...
Article
Jednostkę pływającą, statek czy okręt, trudno porównywać z jakimkolwiek innym środkiem transportu. Od strony nawigacji i łączności może przypominać trochę samolot, a może nawet prom kosmiczny, natomiast od strony swojej maszynowni bardziej podobny jest do wielkiej fabryki przemysłowej z dziesiątkami urządzeń obsługujących silniki napędowe.
Article
Summary Publication treats of advanced diagnostic technolog ies used for electrical power quality measure- ments in isolated electrical power systems, applied on ships, small islands, territories occupied by fighting sides, etc. Publication includes observati ons made during the present cooperation and tests carried out onboard three different ship...
Article
Full-text available
the paper is focused on a problem of electric power quality in ship electric power networks. Some current standards relevant to the discussed problem have been presented but the main part of the paper has described the research of voltage and frequency deviations on chosen ship. This research has been carried out on the ship owner request due to un...
Article
This paper is focused on problems of power quality estimation in ships' electric power networks. The characteristic of electricity in the networks has been laid. Many examples of the original research have been presented. Some differences between the ship systems and land networks have been pointed out. The consequences of the differences for measu...
Conference Paper
Full-text available
This paper has been focused on the problem of analysis of notching occurring in electric power systems. Especially a choice of appropriate sampling frequency and its consequence for results of the analysis have been considered. Moreover, the problem of wavelet filter length and, in some respect, wavelet family has been analyzed as well. All analyse...
Article
Full-text available
This paper deals with the problem of estimation of voltage and current spectrum, especially harmonics, in the field of electrical power engineering. After description of hitherto used methods, a method of the combined wavelet-Fourier spectrum analysis has been proposed. The method consists in applying the wavelet transform for samples of the origin...
Conference Paper
The presented paper deals with the problem of electrical power quality estimation in isolated electrical power systems such as ship systems. The main features of such systems, as well as the results of the original research on voltage quality in these systems, are presented. The problems of electrical power quality estimation in ship systems are di...
Conference Paper
The presented paper deals with the problems of electrical power quality estimation, especially in multi-disturbances conditions. The synergy effect of different kinds of supply voltage disturbances have been pointed out and it have been described in relation to additional temperature rise of induction motor windings. The practical consequences for...
Article
The problem of proper power quality and its estimation in electrical power systems is not quite new. But nowadays, it conveys a new meaning. An increasing number of receivers sensitive to supply voltage quality installed in electrical power systems is on par with an increasing volume of disturbing load, especially power converters. These problems c...
Article
Full-text available
Presented paper concerns the problem of signal period estimation improvement by means of the wavelet coefficients. In particular, the interpolation based on the wavelet coefficient has been proposed for this aim. The method does not require virtually any additional computational power of measurement device, under assumption that the wavelet transfo...
Article
W pracy przedstawiono strukturę i model fizyczny analizatora jakości energii elektrycznej opracowanego dla potrzeb energetyki okrętowej. Wspomniany model zrealizowany został z wykorzystaniem procesorów sygnałowych i przeszedł z wynikiem pozytywnym badania swoich właściwości w warunkach laboratoryjnych. Ostatecznej weryfikacji walorów użytkowych mod...
Conference Paper
Presented paper concerns a problem of fast and reliable estimation of voltage waveform quality in ships' electrical power systems. Especially, a problem of detection and further estimation of transient disturbances as well as harmonics of higher order has been shown. The proposed method is based on both digital Fourier transform DFT and digital wav...
Article
The paper focuses on problems of estimation of supply voltage parameters in ships’ electrical power systems. The relevant parameters have been shown and algorithms of their measurement have been presented. Moreover, applicability of presented approach has been laid. Particularly, parameters of voltage during changing of ship’s power plant configura...
Article
W pracy przedstawiono problematykę oceny jakości energii elektrycznej w okrętowych systemach elektroenergetycznych. Zaproponowano reprezentatywny zestaw wskaźników jakości energii elektrycznej dla potrzeb bieżącej jej oceny w rozważanych systemach. Następnie przedstawiono odpowiednie algorytmy pomiarowe i omówiono rezultaty ich weryfikacji. Dalej p...
Article
In the presented paper the preliminary and exemplary results of voltage analysis on bus bars of main switchboard were shown. The special attention was paid on voltage and its frequency deviation from their nominal values as well as different kinds of voltage waveform distortions. The research consists of measurement results of two objects. It means...
Conference Paper
This paper presents the basic problems connected with reliable estimation of quality of electrical energy. The critique of traditional approach to these problems is included as well as the approaches based on simple parametric factors and new synthetic factors have been shortly described. Some preliminary results based on the analysis of the real r...
Conference Paper
This paper presents the problems of electrical energy quality estimation in ship electrical power system and describes the appropriate factors of this. These factors were worked out with the criterion of safe operation of ship technical systems. Economical aspects of the presented problems have only auxiliary importance. Special attention has been...
Article
In this paper basic information concerning the quality of electrical energy in a ship's power engineering system has been presented and new concepts of measurement of its factors in the system under consideration are proposed. Criteria of selection and proposals for defining related factors describing the electrical energy quality are presented. Th...

Projects

Projects (4)
Project
The project want to explore the possibility of integrate microgrid technologies in next generation shipboard power systems. The idea is to test different electrical topologies including AC, DC, and hybrid AC/DC ones. Energy storage systems like batteries, flywheels or supercaps will be studied. Different controllers including centralized, decentralized, distributed, or hierarchical will be also compared and tested.