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Tytuł:
Characteristics simulations of the electrodynamic railgun different constructions and their measurement verification
Autorzy:
Piekielny, Paweł
Tomczuk, Bronisław
Waindok, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/27309948.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
3D field analysis
analysis of transients
analytical models
electrodynamic accelerator
experimental verification
field-circuit modeling
projectile velocity
Opis:
Dynamic characteristics for three types of railgun constructions were simulated and measured in this work. The simplest construction is the iron-less (IL) railgun, while the two other ones (IC and ICPM) have an iron-core. The iron-core permanent magnet (ICPM) railgun additionally has permanent magnets. To compare their characteristics, similar dimensions of the rails and iron cores were adopted, and the same power supply system was used. Numerical magnetic field analyses and our analytical models have been used to determine the electromagnetic parameters. They were verified experimentally. The transient states of the railguns were studied with our field-circuit mathematical model, and their results were also verified by experiments.
Źródło:
Archives of Electrical Engineering; 2023, 72, 4; 951--969
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Hydraulic Characteristics on Fluid Transients Analysis under Different Types of Control Valves
Autorzy:
Al-Zaidi, Basim M.
Ismaeel, Abaas J.
Powiązania:
https://bibliotekanauki.pl/articles/2202314.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hydraulic characteristics
fluid transients
valve
Opis:
In this study, several types of valves were used to study the impact of the valves types and closure characteristics on fluid transients. The valve closure curves, which are the variation of the effective valve opening as a function of percentage opening area, were derived for different selected valves. Six different types of valves were selected to study the effect of the valves types on fluid transient conditions. For simplification, a very simple pipeline system was assumed and presented in this study. The system is about two pipes connected in a series junction and they take the water from a constant-level reservoir at upstream and a valve at downstream. The duration of valve closure was taken as six seconds which plays an important role in the pressure development in the system. A method of characteristics is applied to compute the transient conditions under gradual closure of the valves. Valve data of various forms were compiled and reported as discharge and headloss coefficients as a function of valve opening. The effect of valve geometry and operation on the relative valve opening were compared. Discharge and headloss coefficients were also compared between valve types. The study concluded that transient conditions depend on the valve type. The comparison between the results of all valve types indicated that the changes in pressure and discharges depend on valve type where there is a difference in effective valve opening. It can be concluded that the valve with the highest value of valve effective opening has less effect on transient conditions, i.e., the faster changes of effective valve opening the larger the effect on transient conditions (discharge and the greater the magnitude of the pressure wave). This study would help to select the property valve in pipeline design.
Źródło:
Journal of Ecological Engineering; 2022, 23, 12; 111--123
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical criterion for the duration of non-chaotic transients in ODEs
Autorzy:
Szczebiot, Ryszard
Kaczyński, Roman
Gołdyn, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/2204683.pdf
Data publikacji:
2022
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
numerical criterion
non-chaotic transients
limit cycle
ODEs systems
Van der Pol oscillator
Opis:
The paper proposes an original numerical criterion for the duration analysis of non-chaotic transients based on the Euclidean norm of a properly defined vector. For this purpose, transient trajectories, prior to their entering a small neighbourhood of the limit cycle, are used. The vector has been defined with its components constituting the lengths of the sections, which connect the origin of the coordinate system with appropriately determined transient trajectory points. The norm of the vector for the analysis of non-chaotic transients has also been applied. As an assessment criterion of transients, the convergence of the norm to small neighbourhood of the limit cycle with the assumed accuracy is used. The paper also provides examples of the application of this criterion to the Van der Pol oscillators in the case of periodic oscillations.
Źródło:
Acta Mechanica et Automatica; 2022, 16, 4; 388--392
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of operability of Peltier modules in cooling systems based on the analysis of transient operating modes
Autorzy:
Kuzichkin, Oleg Rudolfovich
Konstantinov, Igor Sergeevich
Vasilyev, Gleb Sergeevich
Surzhik, Dmitry Igorevich
Powiązania:
https://bibliotekanauki.pl/articles/1845461.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermoelectric system
agriculture
complex
transients
peltier effect
identification algorithms
Opis:
The paper is devoted to the control of operability of Peltier modules based on the analysis of transient modes of their operation. Advantages of using low-power thermoelectric modules for the development of thermoelectric plants with adaptive control systems for the needs of the agricultural complex, which significantly reduce their cost characteristics, are shown. The problem of using the stationary mode of their operation, associated with the low efficiency of the modules, as well as the dynamic mode, associated with the presence of transient processes, is indicated. It is noted that overcoming this problem requires solution of the task of automation of reliability providing the well-known approaches to its solution are shown, for which the key advantages and disadvantages are given. An approach is proposed to complex control of the operability and quality of thermoelectric modules during their expluatation in three components of the physical process of thermoelectric conversion (Peltier thermoelectric effect, electrical and thermal transfer phenomena) by analyzing transients in the system based on identification algorithms. To justify it, the necessary equations and mathematical relations are given. Aprobating of the proposed approach was carried out experimentally by determining the time constants for operable and defective commercially available modules and showed its significant advantages over the standard verification procedure.
Źródło:
Archives of Thermodynamics; 2021, 42, 2; 31-42
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Transients in a 4-Level Flying Capacitor Converter: Time Domain Approach. Part 1: Large Normalised Voltage Command
Autorzy:
Reznikov, Boris
Ruderman, Alex
Galanina, Valentina
Powiązania:
https://bibliotekanauki.pl/articles/1193906.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
4-level DC-DC converter
flying capacitor
natural balancing
transients
Opis:
A 4-level flying capacitor converter (FCC) operation is considered on a base of discrete state-space model. A transition matrix is obtained for a pulse width modulation (PWM) period for large normalised voltage command values [1/3, 1). The transition matrix elements are expanded into power series by small parameters. The matrix eigenvalues are presented in the form of power series as well. Six separate transients are constructed for six possible initial FCC states on a PWM period. Inductor current and capacitors’ voltage transients are found for the voltage source power-up as the arithmetic average of the six separate transients. Finally, the discrete solutions are replaced by equivalent continuous ones. Simple and accurate formulas for inductor current and capacitors’ voltage transients demonstrate good agreement with simulation results.
Źródło:
Power Electronics and Drives; 2020, 5, 40; 27-40
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Transients in a 4-Level Flying Capacitor Converter: Time Domain Approach. Part 2: Small Normalised Voltage Command
Autorzy:
Reznikov, Boris
Ruderman, Alex
Galanina, Valentina
Powiązania:
https://bibliotekanauki.pl/articles/1193863.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
4-level DC–DC converter
flying capacitor
natural balancing
transients
Opis:
A 4-level flying capacitor converter (FCC) operation is considered on a base of discrete state-space model. A transition matrix is obtained for a pulse width modulation (PWM) period for small normalised voltage command values [0, 1/3]. The transition matrix elements are expanded into power series by small parameters. The matrix eigenvalues are presented in the form of power series as well. Six separate transients are constructed for six possible initial FCC states on a PWM period. Inductor current and capacitors’ voltage transients are found for the voltage source power-up as the arithmetic average of the six separate transients. Finally, the discrete solutions are replaced by equivalent continuous ones. Simple and accurate formulas for inductor current and capacitors’ voltage transients demonstrate good agreement with simulation results.
Źródło:
Power Electronics and Drives; 2020, 5, 40; 41-57
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration transients of reservoir-pipe-valve system caused by water hammer
Autorzy:
Miao, Yang
Jiang, Yuncheng
Qiu, Zaihui
Pan, Jun
Wang, Lu
Han, Zhenrong
Li, Kun
Zhang, Li
Zhang, Xiaolu
Powiązania:
https://bibliotekanauki.pl/articles/1839616.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
reservoir-pipe-valve system (RPV system)
water hammer
vibration
transients
Opis:
A severe oscillation, accompanied with an abnormal “click” sound, of a fuel feeding pipe system during valve closing, when the feeding flowrate reaches a certain value, is observed experimentally. A fluctuation model in which stiffness and damping coefficients of the vibration system are time varying is proposed. Each coefficient is composed of two parts, one of which is constant and the other is time varying. Based on this model, simulation transients of the vibration displacement, velocity and pressure in the pipe are presented. Simulations of the pressure transients are compared with experimental data detected by pressure transducer, which shows that both have fluctuations in the transient process at a large flowrate.
Źródło:
Journal of Theoretical and Applied Mechanics; 2020, 58, 4; 1037-1048
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical calculations of surges caused by direct lightning strike to underground intrusion detection system
Autorzy:
Aniserowicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/200287.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lightning
transients
overvoltages
analytical modeling
underground cable
błyskawica
transjenty
przepięcia
modelowanie analityczne
kabel podziemny
Opis:
The paper presents an analysis of overvoltages caused by a direct lightning strike in intrusion detection system equipped with underground radiating cable sensors. Waveforms of currents and voltages in the system components are calculated using analytical formulas basing on a transmission-line model in the frequency domain. The time-domain waveforms are computed using the inverse fast Fourier transform (IFFT). Three network configurations of the intrusion detection system are analyzed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 2; 263-270
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation on ferroresonance due to power transformer energization in high voltage 400 kV transmission grid
Autorzy:
Polewaczyk, Mateusz
Robak, Sylwester
Szewczyk, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/141509.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ferroresonance
high voltage
Poincaré map
power system transients
PSCAD
Opis:
This paper presents a study on ferroresonance occurring in a high voltage 400 kV transmission grid due to energization of power transformer under no-load conditions. The system scenarios analyzed in the present paper are considered as critical for development and modernization plans as currently announced by the national grid operator in Poland. The PSCAD simulation model was developed and applied for several study cases of a system with double-circuit arrangement of a transmission line. It is shown that the ferroresonant oscillations can be initiated by two-phase switching operation of a line circuit breaker. The impact of the double-circuit length on the ferroresonance mode and severity is demonstrated with the use of the Poincaré map analysis and Short Time Fourier Transform. It is demonstrated that the length of the transmission line that is mutually coupled in the double-circuit arrangement has a significant impact on the ferroresonance occurrence and on its mode. As the ferroresonance can pose severe threat to the power system components due to the severe overvoltage and overcurrent oscillations, the analysis presented in this paper demonstrates the necessity of the ferroresonance analyses for any re-designed transmission system.
Źródło:
Archives of Electrical Engineering; 2019, 68, 4; 771-786
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling transients in MV resonantly grounded industrial grid during single line to ground faults
Autorzy:
Warecki, Jurij
Gajdzica, Michał
Powiązania:
https://bibliotekanauki.pl/articles/377060.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
electrical grid
grounding methods
transients overvoltage
transient intermittent faults
Opis:
Medium voltage distribution power grids mostly operate with ungrounded neutral points of transformer. The philosophy about these power supply systems based on the assumption that the electrical grid is more reliable. However the practice of operation showed that currents of single phase or multiple faults to ground depend mostly on the earth capacitances of cables connected to power grid and configuration and structure in relation to the main substation buses. Moreover, this kind of arcing ground faults on the ungrounded system causes transient overvoltages several times than nominal value. In the consequence, it may be dangerous for the electrical devices connected to the power system. The article focuses on the transient impact the equipment insulation due to faults in the middle voltage industrial grid with adjustable speed drives. The examination results of transient voltages across the system was presented. The Matlab/ Simulink Software was used to modeling system behavior during intermittent faults.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2019, 98; 65-75
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Transient Performance of Partially-Undergrounded Overhead Lines in the Presence of Corona
Autorzy:
Saied, Mohamed M.
Powiązania:
https://bibliotekanauki.pl/articles/262791.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
distributed parameter circuits
non-uniform lines
power transmission lines
line modeling
transients
power networks
mixed
overhead-cable lines
partial undergrounding
distributions
mathematica
Opis:
The paper presents a method for investigating the electromagnetic transients of partially under-grounded high voltage overhead transmission lines in the presence of corona. It is based on a time domain model in which the corona is simulated by distributed voltage-dependent shunt current sources. The line segments and the inserted cable section are represented by a single equivalent transmission element having location-dependent circuit parameters per unit length. The numerical solution of the resulting set of differential equations yields the distributions of the voltage, the longitudinal current and the shunt corona current (per unit length) as functions of location and time. The presented two-, three-dimensional and contour plots proved to be helpful in discussing these distributions and in identifying any eventual current and/or voltage concentrations. The developed computer code in Mathematica can handle any time waveform of the source initiating the transients, any line termination as well as any lengths of the overhead line and cable section.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2019, 21, 1; 1-8
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ charakterystyk eksploatacyjnych sieci przemysłowych na dobór parametrów filtrów harmonicznych
Impact of industrial network operating characteristics on the harmonic filter parameters sizing
Autorzy:
Warecki, Jurij
Gajdzica, Michał
Powiązania:
https://bibliotekanauki.pl/articles/268765.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
filtr wyższych harmonicznych
stany ustalone
stany przejściowe
bateria kondensatora
dławik filtrujący
harmonic filter
steady state
transients
capacitor bank
air-core filter reactor
Opis:
Układy kompensacji mocy biernej oraz filtracji, oparte na kondensatorach znajdują powszechne zastosowanie w praktycznych rozwiązaniach systemów przemysłowych. Ich parametry znamionowe wyznaczane są wyłącznie w oparciu o harmoniczne prądów oraz napięć w stanach ustalonych, niemniej jednak tyczy się to głównie jednostek filtrujących o prostej topologii. Stąd, mając na uwadze bardziej złożone układy w większości przypadków istniejących lub nowoprojektowanych obiektów wymaga się, aby analizowane układy były dostosowane do pracy zarówno w warunkach ustalonych jak i przejściowych. Korzystając ze standardów oraz norm, w artykule omówiono procedurę doboru parametrów baterii kondensatorów oraz dławików układów filtrujących z pozycji ich bezawaryjnej pracy w elektrycznych sieciach przemysłowych. Zaproponowana metoda ma wspomóż działania projektowe filtrów harmonicznych.
The application of harmonic filter circuit based on power capacitor banks are widely used in practical solutions in industrial systems. The component ratings of these units are often specified based solely on a combination of steady state fundamental and harmonic voltages and currents. Although, this may be adequate in single-tuned or single branch units and method may not properly rate the components for more complex applications such as multiple, single-tuned harmonic filter circuits in compensated installations. Thus, in the most cases of commonly used or newly designed circuits are required to be adapted to operate as well in steady state and transients conditions. Using the exsisting Standards, the article propose a method for determining equipment ratings parameters of the capacitor banks and air-core filter reactors according to malfunctions. The study illustrated in this paper will be used to support and improve harmonic filter realiability and design. It is hoped that ideas will be a resource for a future filter application guide being contemplated by the capacitor subcommittee.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2019, 67; 47-51
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stany nieustalone towarzyszące pomiarowi impedancji pętli zwarcia w obwodach wyjściowych zasilaczy bezprzerwowych UPS
Transient states associating loop impedance measurement in the output line of UPS power supplies
Autorzy:
Olesz, M.
Katarzyński, J.
Powiązania:
https://bibliotekanauki.pl/articles/266602.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
stany nieustalone
zasilacze bezprzerwowe
pomiary jakości energii elektrycznej
impedancja pętli zwarcia
transients
uninterruptible power supplies
power quality measurements
fault loop impedance
Opis:
W pracy przedstawiono metodykę i wyniki pomiarów stanów nieustalonych w zasilaczu bezprzerwowym (UPS) typu on - line. Do rejestracji zdarzeń po stronie zasilania i na wyjściu UPS wykorzystano dwa przyrządy do pomiaru jakości energii elektrycznej zsynchronizowane czasowo. Rejestratory kompresują uzyskane dane pomiarowe, co może wprowadzać dodatkowe błędy pomiaru wielkości mierzonych – napięć i prądów. Dodatkowe rejestracje oscyloskopem wielokanałowym potwierdziły poprawność danych uzyskiwanych w celu określenia reakcji zasilacza na zaburzenia występujące na wejściu i wyjściu urządzenia. W pracy analizowano wyniki pomiarów impedancji pętli zwarciowej zmierzone przyrządem wymuszającym poziomy prądu zwarciowego na linii zasilającej odbiorniki energii elektrycznej we wszystkich stanach pracy zasilacza, a następnie porównywano je z wynikami obliczeń przeprowadzonych na uzyskanych przebiegach prądu i napięcia.
The paper presents the methodology and the results of transient measurement in on-line Uninterruptable Power Supply (UPS). There were two power quality measurement instruments (synchronised with time) used for registering the events in UPS input and output. The recorders compress the obtained measurement data, which may introduce additional measurement errors of measured values, i.e. voltage and current. Additional registrations with a multi-channel oscilloscope confirmed the correctness of the obtained data in order to determine the reaction of the UPS to the disturbances occurring in UPS input and output. The work analysed the results of loop impedance, measured by a meter that forces short-circuit current in the line supplying electric load, in all states of the UPS, and then they were compared with the results of calculations carried out on the obtained current and voltage waveforms. The measurement of fault loop impedance in UPS output line should be performed in active static switch (bypass mode), because UPS will operate in this mode after switching from inverter operation due to high current forcing during a short circuit in the UPS output. Measurement of fault loop impedance in UPS output circuits, when it is in AC-DC-AC double conversion mode, may result with loop impedance overstating by meters, which in turn limits recognition of the tested installation as safe from the protection against electric shock by automatic power off point of view. The values of calculated loop impedance at forced high current, i.e. 160 A in the UPS output, when it is respectively in the manual bypass and static switch mode, are 4% and 2.5% lower than the ones presented by meter after measure by forcing high current. Differences in impedance of the static switch and manual bypass UPS mode can be the basis for the estimation of the thyristor impedance. Estimation of direct measurement results with 14.6 m, and according to the calculation of recorded transients it is about 16.1 m.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2018, 61; 57-60
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of transformer modeling on riser pole arresters behavior during switching transients
Autorzy:
Abbaszadeh, A.
Abedi, M.
Doustmohammadi, A.
Powiązania:
https://bibliotekanauki.pl/articles/140474.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
arresters
ATP software
ferroresonance
transformer
power system transients
Opis:
Arresters are widely used in power systems to protect other equipment against overvoltages. However, in some conditions, they can’t operate successfully. One of the disturbances leading to the failure of the riser pole arresters is the ferroresonance overvoltages. In this paper, at first the influence of different transformer simulation models of ATP software on the occurrence of ferroresonance is studied and then the effect of ferroresonance on the riser pole arrester has been scrutinized through the thermal and electrical performance of the arrester in an underground distribution system. The results show that the arrester temperature rises due to energy dissipation in a ferroresonance circumstance, which indeed may result into the explosion of the arrester. Also, applying different models of the transformer in the ATP software and comparing the results, it is shown that the available models do not show the same effect on the arrester.
Źródło:
Archives of Electrical Engineering; 2017, 66, 4; 717-730
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-spark modeling of very fast transient overvoltages for the purposes of developing HV and UHV gas-insulated switchgear and of conducting insulation co-ordination studies
Autorzy:
Szewczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/200835.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
very fast transient overvoltages
VFTO
gas insulated switchgear
GIS
disconnector switch
DS
modeling
simulations
transients
switching
mitigation
breakdown voltage
BDV
odłącznik
modelowanie
symulacje
transjenty
przełączanie
łagodzenie
rozdzielnice izolowane gazem
Opis:
Very fast transient overvoltages (VFTO) originate from steep voltage breakdowns in SF6 gas that are inherent to operation of any switching device of the gas-insulated switchgear (GIS) type. For power stations with voltage ratings exceeding 500 kV, the ratio between equipment rated- and withstand-voltage levels becomes relatively low, which causes the VFTO peak values to reach the component’s insulation withstand-voltage levels, thus becoming a design factor for high- and ultra-high voltage GIS. While well-established approach to VFTO analyses involves only single VFTO events (the so-called single-spark approach), there is often the need to analyze the entire VFTO generation process, for which the multi-spark approach to VFTO modeling is to be employed. The multi-spark approach allows one to evaluate the VFTO impact on the GIS disconnector design along with the impact of the VFTO on selection and dimensioning of the VFTO damping solutions. As the multi-spark approach to VFTO modeling is now being increasingly used in UHV GIS developments as well as for the insulation co-ordination studies of power stations, the present paper is motivated by the need to report on the VFTO multi-spark modeling approach and to lay a common ground for development works that are supported extensively with VFTO simulations. The paper presents physical assumptions and modeling concepts that are in use in such modeling works. Development of the multi-spark GIS disconnector model for VFTO simulations is presented, followed by an overview of examples of the model application for the GIS development works and for insulation co-ordination studies.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 6; 871-882
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 39

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