ELEKTRYKA - Issue 3-4/2017 (243-244) - Politechnika Śląska, Wydział Elektryczny

ELEKTRYKA - Issue 3-4/2017 (243-244)

ELEKTRYKAYear LXIII (2017)

KwartalnikIssue 1-2 (243-244)

Scientific Committee

CONTENTS

Foreword

Jerzy HICKIEWICZ Piotr RATAJ : DZIAŁALNOŚĆ IGNACEGO MOŚCICKIEGO W DZIEDZINIE ELEKTROTECHNIKI -W 150 ROCZNICĘ JEGO URODZIN
Andrzej ZAWADZKI, Maciej WŁODARCZYK: CFE METHOD – QUALITY ANALYSIS OF THE APPROXIMATION OF REVERSE LAPLACE TRANSFORM OF FRACTIONAL ORDER
Jarosław SZCZEPANIAK, Maciej WŁODARCZYK : PROPAGATION OF RECTANGULAR PULSES IN THE CASCADE OF FOUR-TERMINAL NETWORKS
Roman KORAB, Robert OWCZAREK, Marcin POŁOMSKI : COORDINATION OF PHASE SHIFTING TRANSFORMERS BY MEANS OF THE SWARM ALGORITHM
Robert WÓJCICKI, Krzysztof DĘBOWSKI : THE IMPACT OF PROSUMER PHOTOVOLTAIC INSTALLATIONS ON SHAPING THE PROFILE OF THE POWER DEMAND IN POLAND
Bartłomiej TWOREK : ERRORS PRESENT IN THE DESIGN OF CAR ELECTRICAL INSTALLATIONS
Wojciech LUBICKI, Maksymilian PRZYGRODZKI : SELECTED METHODS OF DETERMINING PROBABILISTIC POWER FLOW

Jerzy HICKIEWICZ

Politechnika Opolska, Oddział Opolski Stowarzyszenia Elektryków Polskich

Piotr RATAJ

Uniwersytet Opolski, Oddział Opolski Stowarzyszenia Elektryków Polskich

DZIAŁALNOŚĆ IGNACEGO MOŚCICKIEGO W DZIEDZINIE ELEKTROTECHNIKI -W 150 ROCZNICĘ JEGO URODZIN

Summary. Artykuł przybliża elektrotechniczną działalność Ignacego Mościckiego, wybitnego naukowca, technika, a później prezydenta II RP. Podkreślono w nim wszechstronność, jako cechę którą się szczególnie wyróżniał. Działał on bowiem na wszystkich polach działalności technicznej, od wynalazcy, badacza, poprzez konstruktora, technologa wreszcie organizatora produkcji. Wynalazł on wydajną metodę pozyskiwania azotu z powietrza przy użyciu elektryczności i skonstruował aparaturę elektryczną służącą do tego celu. W jej skład wchodziły bezkonkurencyjne w owym czasie kondensatory wysokiego napięcia, zwane ,,Kondensatorami Mościckiego’’, których był konstruktorem.

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Andrzej ZAWADZKI, Maciej WŁODARCZYK

Kielce University of Technology

CFE METHOD – QUALITY ANALYSIS OF THE APPROXIMATION OF REVERSE LAPLACE TRANSFORM OF FRACTIONAL ORDER

Summary. The paper presents the CFE (Continued fraction expansion) method, which allows determination of inverse transform of expression containing element sby expanding it into a continued fraction. On the basis of the presented method, analysis of selected electrical circuits containing quasi-elements described with fractional derivatives was performed. Calculations and numerical simulations were also carried out.

Wersja elektroniczna artykułu

Jarosław SZCZEPANIAK, Maciej WŁODARCZYK

Kielce University of Technology

PROPAGATION OF RECTANGULAR PULSES IN THE CASCADE OF FOUR-TERMINAL NETWORKS

Summary. The paper presents a method of determining the transmittance of circuits with distributed parameters, in this case a transmission line consisting of a cascade of identical four-terminal networks. To construct the transmittance, signal flow graph theory was used. The result is provided in the form of a rational function which has two single poles and four multiple poles ((N-2)-tuple poles), if network consists of N four-terminal networks loaded with resistance. On the basis of the transmittance we calculated load voltage with unit step function or rectangular pulse at the input. Conclusions on transmission possibilities for digital signals have been formulated on the basis of obtained results.

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Roman KORAB, Robert OWCZAREK, Marcin POŁOMSKI

Silesian University of Technology, Gliwice

COORDINATION OF PHASE SHIFTING TRANSFORMERS BY MEANS OF THE SWARM ALGORITHM

Summary. The use of several phase shifting transformers (PSTs) in an interconnected power system must be coordinated in order to take full advantage of these devices and to avoid adverse interactions. This paper presents an optimization method of PST settings based on the particle swarm optimization (PSO) algorithm. The minimization of an unscheduled flow through a given system was used as the optimization criterion. Simulation results for an IEEE 118-bus test system are given.

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Robert WÓJCICKI, Krzysztof DĘBOWSKI

Silesian University of Technology, Gliwice

THE IMPACT OF PROSUMER PHOTOVOLTAIC INSTALLATIONS ON SHAPING THE PROFILE OF THE POWER DEMAND IN POLAND

Summary. The paper discusses the impact of prosumer photovoltaics installations on shaping the profile of the KSE power demand in Poland at different times of the year. Predictions were made on the basis of the partial data from photovoltaic installations operating in Poland in 2014. The analysis was performed in accordance with new regulations contained in the Renewable Energy Act.

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Bartłomiej TWOREK

Silesian University of Technology, Gliwice

ERRORS PRESENT IN THE DESIGN OF CAR ELECTRICAL INSTALLATIONS

Summary. The article presents a case of bad construction solutions in the design of electrical systems in vehicles. Author presents practical cases of badly designed wire harnesses as well as repair methods and good practices.

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Wojciech LUBICKI, Maksymilian PRZYGRODZKI

Silesian University of Technology, Gliwice

SELECTED METHODS OF DETERMINING PROBABILISTIC POWER FLOW

Summary. Taking into consideration the variability of the future conditions determining the branches load, it might be interesting to use probabilistic power flow for solving power flow. To determine the probabilistic power flow analytical methods (including approximation) or simulation methods may be applied. The choice of calculation method is the result of a compromise between the quality of the results obtained and the required time of calculations. In this paper, we have characterized cumulates method and point estimation method (these are analytical methods). We have cited Polish research initializing these issues (convolution method and the method of voltage orthogonal components). Existing possibilities of probabilistic power flow implementation issues are discussed in terms of available software.

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