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2010 International School on Nonsinusoidal Currents and Compensation

Date 15-18 June 2010

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  • [Front cover]

    Publication Year: 2010, Page(s): c1
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  • [Title page]

    Publication Year: 2010, Page(s): i
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  • [Copyright notice]

    Publication Year: 2010, Page(s): ii
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  • Contents

    Publication Year: 2010, Page(s):iii - v
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  • Preface

    Publication Year: 2010, Page(s): 1
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  • Committees

    Publication Year: 2010, Page(s): 2
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  • Conference subject matter

    Publication Year: 2010, Page(s): 3
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  • [Blank page]

    Publication Year: 2010, Page(s): 4
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  • Reflections on power theories for poly-phase nonsinusoidal voltages and currents

    Publication Year: 2010, Page(s):5 - 16
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (435 KB) | HTML iconHTML

    This tutorial paper reviews the fundamentals of different methods for current decomposition and non-active power compensation in poly-phase power systems. The basic concepts and the properties of the instantaneous active and reactive power theory and of the active/reactive average power theory are discussed and critically compared. View full abstract»

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  • Instantaneous p–q power theory for control of compensators in micro-grids

    Publication Year: 2010, Page(s):17 - 26
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1324 KB) | HTML iconHTML

    The main objective of this tutorial is to present the basic concepts on the instantaneous p-q Theory and then show its applicability for controlling switching converters connected in a micro-grid. These converters can be used for connecting renewable energy sources (solar, wind, and others) to the micro-grids or for harmonic, reactive power or unbalance compensation, and even for voltage regulatio... View full abstract»

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  • CPC-based comparison of compensation goals in systems with nonsinusoidal voltages and currents

    Publication Year: 2010, Page(s):27 - 36
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (347 KB) | HTML iconHTML

    There is some level of confusion upon goals of compensation in systems with nonsinusoidal voltages and currents (NV&C), especially considering that compensation with switched compensators is a recursive process. This recursive nature of compensation is often ignored in discussions on compensation. This paper presents results of studies on recursive compensation with a switching compensator, ai... View full abstract»

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  • Conservative Power Theory, sequence components and accountability in smart grids

    Publication Year: 2010, Page(s):37 - 45
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (902 KB) | HTML iconHTML

    Smart grids offer a new challenging domain for power theories and compensation techniques, because they include a variety of intermittent power sources which can have dynamic impact on power flow, voltage regulation, and distribution losses. When operating in the islanded mode, smart micro-grids can also exhibit considerable variation of amplitude and frequency of the voltage supplied to the loads... View full abstract»

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  • Distributed intelligence for smart grid control

    Publication Year: 2010, Page(s):46 - 58
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1587 KB) | HTML iconHTML

    This paper provides an overview of the challenges, their potential solutions and the trends in the control of electrical power distribution in presence of distributed generation. Power grids are supposed to go through a significant transformation in the close future. Distribution is supposed to be mostly affected. The tutorial reviews the current practice and outlines the possible evolutions towar... View full abstract»

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  • Dynamic grid-flux-based control for grid connected voltage-source converters

    Publication Year: 2010, Page(s):59 - 68
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (309 KB) | HTML iconHTML

    Power-grid connected voltage-source converters provide two-way energy exchange with the grid. They are used for renewable energy applications, combined heat and power, active filtering and loads with dynamically changing working conditions. Aggravated grid codes and dynamic loads require very fast control methods. A control based on the integral of the grid voltage (called grid flux) offers extrem... View full abstract»

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  • Flux-based control of 3-phase Active Front End

    Publication Year: 2010, Page(s):69 - 73
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1884 KB) | HTML iconHTML

    Active Front End converters (AFE) connect a DC link to a grid, usually with three phases. They allow energy flow in both directions, reduce grid-current harmonics, needed short-circuit power and non-active power in comparison to diode or thyristor-based devices. One more advantage, with is in the center of this paper, is the dynamic reaction to load variations combined with the need for robust con... View full abstract»

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  • p–q power theory: Some theoretical and practical aspects

    Publication Year: 2010, Page(s):74 - 79
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (129 KB) | HTML iconHTML

    This paper presents an analysis of Akagi's p-q theory for active filtering under real nonsinusoidal voltage conditions. It is ascertained that compensating the alternative parts of the instantaneous active and reactive powers leads to a sinusoidal power source current only under sinusoidal voltage conditions. The mathematical demonstration is found and it is verified on some practical examples. It... View full abstract»

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  • Hybrid power filter with single tuned passive filter - dynamical properties

    Publication Year: 2010, Page(s):80 - 83
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1843 KB) | HTML iconHTML

    The paper has been intended to present the analysis of hybrid power filter (HPF) dynamical properties. The hybrid power filter with single tuned passive filter has been taken into consideration. The present paper deals with influence of control algorithm and its components on dynamical properties of HPF. Experimental results of transient states have also been included in the article. View full abstract»

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  • The use of geometric algebra in circuit analysis and its impact on the definition of power

    Publication Year: 2010, Page(s):89 - 95
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB) | HTML iconHTML

    Geometric algebras of the Euclidean 2-dimensional and 3-dimensional spaces have been used to analyze electric circuits with linear and harmonic generating loads (HGLs). It is shown in this paper that with both loads, time domain signals may be transformed to the Gn domain such that the resulting multivectors permit circuit analysis through rotations and dilation-contractions of the exci... View full abstract»

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  • The effect of PWM frequency on the effectiveness of protection against electric shock using residual current devices

    Publication Year: 2010, Page(s):96 - 100
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (339 KB) | HTML iconHTML

    In the paper spectral analysis of the distorted earth fault currents in circuits with variable speed drives is performed. The impact of these distorted currents on the fibrillation effect is evaluated. Effectiveness of protection against electric shock using residual current devices in circuits with variable speed drives for various PWM frequencies is discussed. Operational characteristic of the p... View full abstract»

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  • Three-phase AC systems interfaced by current source matrix converter with space vector modulation

    Publication Year: 2010, Page(s):107 - 112
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1452 KB) | HTML iconHTML

    The paper deals with three-phase AC systems interfaced by frequency converter without DC storage. As an interface between AC systems the current source matrix converter (CSMC) with space vector modulation (SVM) is used. First the averaged state space models are formulated. Next, the results of the analysis based on two frequency D-Q transformation method are presented. Furthermore simulation and e... View full abstract»

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  • The properties of the method of frequency errors correction of input circuits within the range of nonlinear operation

    Publication Year: 2010, Page(s):113 - 116
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB) | HTML iconHTML

    The paper concerns the method of the correction of frequency errors of input circuits, elaborated for correction of module errors and phase errors of linear input circuits. The method is implemented in the spectral domain in a programmed manner. The author presents the findings of experimental research which show the efficiency of the method in measurements of rms value of nonsinusoidal current wi... View full abstract»

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  • CPC based converter control for systems with non-ideal supply voltage

    Publication Year: 2010, Page(s):117 - 122
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (805 KB) | HTML iconHTML

    In recent years there have been many strategies proposed for use of proportional plus resonant P-R controllers both in the stationary and in the synchronous reference frame that demonstrate grid-connected converter performance can be improved under non-ideal supply conditions such as supply asymmetry and supply voltage distortion. However, when employed in systems with high frequency variability s... View full abstract»

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  • Power electronics active filter with controlled dynamics and improved EMC

    Publication Year: 2010, Page(s):123 - 126
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1680 KB) | HTML iconHTML

    Present tendencies of evaluation current distortion compensation methods aim to work out such compensator (serial or parallel active filter) which would be able to realize real time compensation of current distortions. The assumed aim of parallel active filter work is dynamic compensation of differential current which is the difference between load current and reference current. Unfortunately, dyn... View full abstract»

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  • Orthogonality of functions describing power states in electrical circuits in Budeanu's concept

    Publication Year: 2010, Page(s):127 - 131
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB) | HTML iconHTML

    The Budeanu's concept of circuit analyses with nonsinusoidal voltages and currents has been presented in details with Author's comments. It has been reminded that Bunet was the first who proposed summing up reactive powers of the harmonics of nonsinusoidal waveforms. This postulate was included in so called Boucherot theorem. It has been shown that proposed by Budeanu vectors presenting the reacti... View full abstract»

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  • Pole-restraining control of three-phase Active Front End

    Publication Year: 2010, Page(s):132 - 137
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (810 KB) | HTML iconHTML

    State-of-the-art control approaches often neglect the time-variant characteristics of power-electronic systems in favour of a time-averaged approach. In consequence, the resulting system is partly instable, thus not optimally controlled. The pole-restraining control (PRC) removes the inherent instability, giving considerably improved dynamic behaviour. These improvements are demonstrated for three... View full abstract»

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