- Type of paper
: Paper in journal
Title: Stress analysis in pole fixing elements of sinchronous
generators
- Authors:
- Sirotić, Zvonimir (43325)
- Švigir, Nikola (77156)
- Jarić, Vladimir (105383)
Journal: ELEKTROTEHNIKA
Number: 1 2
ISSN: 0013-5844
Volume: 36
Year: 1993
Pages: from 15 to 21
Number of references: 9
Language: hrvatski
Summary: Modes of poles fixation synchronous generators with T-heads
andoblique T-heads, in this paper are examined. Stresses in theT-head and
oblique T-head projections are calculated, andstresses concentration
factors are determinated by usingphotoelastic models. It is seen that this
factors rapidlydecrease with incresing angle alfa up to 25 degrees and
thenslowlier to 45. There is no significant difference in the
averagestresses of the T-head and oblique T-head, but the
stressconcentrations of the later are remarcable lower. This fact willgive
preference to use of the oblique T-head, especially by themachines which
are submitted to frequent runaways, i.e. when thelow cycle fatigue is of
big influence.
Keywords: stress analysis, synchronous generator, pole fixations
- Type of paper
: Paper in journal
Title: Subsynchronous oscillations in the network as a couse of
rotor torsional strain in turbines
- Authors:
- Maljković, Zlatko (27746)
Journal: Energija
Number: 1
Volume: 40
Year: 1991
Pages: from 7 to 13
Number of references: 14
Language: hrvatski
Summary: Torsional oscillations in the axle complex of
largetubine-generators caused by disturbances in the electical networkare
discussed. A specific cause for such potentially dangerousoscillations is
the subsynchronous resonance of theturbine-generator and electrical network
with series compensationof the transmission lines. As a concrete example,
the influenceof this compensation on the subsynchronous oscillations of
therotational moments in the axle is analyzed for a 250 MVAturbogenerator.
Keywords: subsynchronous oscillations, torsional strains, turbine-generator
- Type of paper
: Paper in journal
Title: Small hydel plants
- Authors:
- Šaban, Josip (67155)
Journal: Strojarstvo
Number: 4
Volume: 33
Year: 1991
Pages: from 265 to 266
Language: hrvatski
- Type of paper
: Paper in proceedings
Title: The influence of mechanical damping on torsional
oscillations in turbine-generator shaft
- Authors:
- Maljković, Zlatko (27746)
- Glavan, Boris
- Editors
- Solina, Franc
- Zajc, Baldomir
Proceedings title: Zbornik prve Elektrotehniške in računalniške konference ERK'92
Language: engleski
Place: Portorož, SLOVENIJA
Year: 1992
Pages: from 83 to 86
Meeting: ERK'92 Elektrotehniška in računalniška konferenca
Held: from 09/28/92 to 09/30/92
Summary: An analysis of torsional oscillations in a shaft
turbogeneratorset is presented. Calculation of the torsional oscillations
of aturbine shaft, using a complete mathematical model ispresented, whereby
the shaft is represented by several
concentrated rotating masses (Benchmark model by CIGRE). As a
concrete example, the influence of mechanical damping on the sub-
synchronous oscillations of the shaft torques is analyzed for a
850 MVA turbine-generator. The electrical air-gap torques as well
as the shaft torques were calculated for a variation of fault
clearing times (FCT) of a three-phase close-in fault.
- Type of paper
: Paper in proceedings
Title: Impact of network disturbances on turbogenerator dynamic
strains
- Authors:
- Maljković, Zlatko (27746)
- Kuterovac, Ljiljana (190751)
- Novak, Davor
- Glavan, Boris
- Editors
- Solina, Franc
- Zajc, Baldomir
Proceedings title: Zbornik druge Elektrotehniške in računalniške konference ERK'93
Language: engleski
Place: Portorož, SLOVENIJA
Year: 1993
ISBN/ISSN: 961-6062-00-X
Pages: from 327 to 330
Meeting: ERK'93 Elektrotehniška in računalniška konferenca
Held: from 09/27/93 to 09/29/93
Summary: The torsional oscillation computation for one combined
networkdisturbance is shown for five different turbogenerator sets.
Themodes of torsional modal vibrations, the electrical air-gaptorque
responses and the shaft torques at coupling zones for thedisturbance
mentioned are presented for the nuclear power plant(NPP) Krško. Performed
computations show that the torsionalstrains should be computed separately
because each turboset hasits own vibration mode.
Keywords: turbogenerator torsional strains, network disturbances
- Type of paper
: Paper in proceedings
Title: Mathematical model of two synchronous generators with
turbine drive and field regulation
- Authors:
- Maljković, Zlatko (27746)
- Glavan, Boris
- Editors
- Kecman, Vojislav
Proceedings title: Zbornik radova 37.MEĐUNARODNI GODIŠNJI SKUP KoREMA
Language: hrvatski
Place: Zagreb
Year: 1992
ISBN/ISSN: 86-81571-11-7
Pages: from 111 to 114
Meeting: 37. Međunarodni godišnji skup KoREMA
Held: from 04/26/92 to 04/29/92
- Type of paper
: Paper in proceedings
Title: The accuracy of fem magnetic field computation - a
synchronous machine designer's approach -
- Authors:
- Mandić, Ivan (27930)
- Vidović, Damir
Proceedings title: 5-th International IGTE Symposium
Language: engleski
Place: Graz, Austrija
Year: 1992
Pages: from 1 to 6
Meeting: 5-th International IGTE Symposium
Held: from 09/28/92 to 09/30/92
- Type of paper
: Paper in proceedings
Title: Control of electric field on the bar surface at the slot
end of the stator core of high voltage machines
- Authors:
- Galić, Jozo
- Miletić, Boris (31370)
Proceedings title: JUKO CIGRE - Rotacioni strojevi
Language: hrvatski
Place: Neum, -
Year: 1991
Pages: from 91 to 99
Meeting: XX Savjetovanje JUKO CIGRE
Held: from 04/21/91 to 04/26/91
- Type of paper
: Paper in proceedings
Title: Automized computer analysis of the test results of a
sudden three phase short circuit of a synchronous generator
- Authors:
- Radonić, Biserka
- Mandić, Ivan (27930)
- Rupec, Mladen
Proceedings title: JUKO CIGRE - Rotacioni strojevi
Language: hrvatski
Place: Neum, -
Year: 1991
Pages: from 179 to 186
Meeting: XX Savjetovanje JUKO CIGRE
Held: from 04/21/91 to 04/26/91
Summary: The physical phenomenon at a sudden three-phase short
circuit of a synchronous generator is determined by several parameters,
which influence the dynamic behaviour of the machine. It is possible to
determine these parameters from a sudden three-phase short circuit test,
and it is usually done by a grapho-analytical procedure. A numerical
procedure, which has some advantages, is proposed in the paper. A method of
least squares is applied, which transforms the problem into a task of
finding a minimum of a nonlinear function of several variables. This task
is solved by a procedure based upon the steepest descent method. The
procedure is implemented on an IBM AT compatible computer. The influence of
different kind of noise in the signal is analyzed by numerical experiments.
This is illustrated by a graphical presentation of two examples. The
results can be presented in a convinient graphical or numerical form.
- Type of paper
: Paper in proceedings
Title: Mathematical model of the voltage regulation system of
self-exciting brushless synchronous compound generator
- Authors:
- Erceg, Gorislav (11305)
- Sirotić, Danko (107666)
- Staklenac, Vitomir
- Editors
- Kecman, Vojislav
Proceedings title: Zbornik radova 37.Međunarodni skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1992
ISBN/ISSN: 86-81571-11-7
Pages: from 115 to 118
Meeting: 37. Međunarodni godišnji skup KoREMA
Held: from 04/26/92 to 04/27/92
- Type of paper
: Paper in proceedings
Title: New generation of standardized synchronous generators
- Authors:
- Šaban, Josip (67155)
- Čulig, Zvonko (8510)
- Zaharija-Tiška, Dubravka
Proceedings title: JUKO CIGRE - Rotacioni strojevi
Language: hrvatski
Place: Neum, -
Year: 1991
Pages: from 109 to 119
Meeting: XX Savjetovanje JUKO CIGRE
Held: from 04/21/91 to 04/26/91
- Type of paper
: Paper in proceedings
Title: Valve electrical motors in nuclear power plants - problem
and solution
- Authors:
- Šaban, Ivka
- Šaban, Josip (67155)
- Flegar, LJ.
Proceedings title: VI međunarodno savjetovanje o elektromotornim pogonima
Language: hrvatski
Place: Brijuni, Hrvatska
Year: 1992
Pages: from 248 to 251
Meeting: VI međunarodno savjetovanje o elektromotornim pogonima
Held: from 10/13/92 to 10/15/92
- Type of paper
: Paper in proceedings
Title: Test of synchronous generator sudden three phase short
circuit and analysis of results on computer
- Authors:
- Kovačić, Tihomir (163003)
- Maljković, Zlatko (27746)
- Editors
- Kecman, Vojislav
Proceedings title: Zbornik radova 37.Međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 38 to 41
Meeting: 37. Međunarodni godišnji skup KoREMA
Held: from 04/26/92 to 04/27/92
- Type of paper
: Paper in proceedings
Title: Synchronous generators for diesel-electrical sets
- Authors:
- Šaban, Josip (67155)
- Čulig, Zvonko (8510)
- Zaharija-Tiška, Dubravka
- Rodinis, Dag
Proceedings title: I Savjetovanje HK CIGRE - Elementi postrojenja
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 9 to 17
Meeting: I Savjetovanje HK CIGRE
Held: from 10/10/93 to 10/13/93
- Type of paper
: Paper in proceedings
Title: An approach to the life extension and refurbishment
problem of generator excitation system
- Authors:
- Sirotić, Zvonimir (43325)
- Ban, Drago (1914)
- Erceg, Gorislav (11305)
- Galić, Damjan
- Maljković, Zlatko (27746)
- Puzak, Milivoj (57626)
- Tešnjak, Sejid (49425)
Proceedings title: I Savjetovanje HK CIGRE
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 31 to 40
Meeting: I Savjetovanje HK CIGRE
Held: from 10/10/93 to 10/13/93
Summary: The current state of larger power plants excitation systems
in Croatia is briefly presented in this paper, and general trends in
refurbishment of synchronous generator excitation system are considered. An
approach to the problem of life extension, reconstruction and refurbishment
of turbogenerator excitation system, which operates more than twenty years,
is described on the example of one turbogenerator. The problems of worn out
state of some excitation system components, and trends of new, modern
solutions are considered. For the concrete example, the static excitation
system is prefered. The influence of change of excitation system on
stability of electric power system of Istria is also considered.
Keywords: synchronous generator, excitation system, life extension
- Type of paper
: Paper in proceedings
Title: Limitative speed of vertical umbrella type hydrogenerators
- Authors:
- Sirotić, Zvonimir (43325)
- Jarić, Vladimir (105383)
- Kauzlarić, Gordan
Proceedings title: I Savjetovanje HK CIGRE
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 93 to 102
Meeting: I Savjetovanje HK CIGRE
Held: from 10/10/93 to 10/13/93
Summary: Low speed generators are often designed as so called
umbrella type. This type of the complete generator unit (generator and
turbine) has two bearings only. The rotor spider is bend down (together
with the yoke and poles) in order to shorten the distance between the rotor
centerline and the upper bearing centerline and the rotor gets a shape
which is umbrella like. The advantages of this design can be found in lower
price, lower losses and easier access to the generator from the upper side,
thus making the maintenace somewhat easier. The static excitation system
makes the shaft above the rotor unnecessary. The small distance between
rotor and upper guide bearing reduces the shaft deflection what enables the
smooth run of the machine at higher speeds. The paper analyses factor which
are limiting the maximum speed of the unit, and gives the algorithm to
calculate its maximum permissible value.
Keywords: synchronous generator, umbrella type
- Type of paper
: Paper in proceedings
Title: Some life extension specialities of hydrogenerator
excitation system
- Authors:
- Maljković, Zlatko (27746)
- Erceg, Gorislav (11305)
- Šimunić, Zoran (118650)
- Smolčić, Zlatko (105403)
Proceedings title: I Savjetovanje HK CIGRE
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 51 to 60
Meeting: I Savjetovanje HK CIGRE
Held: from 10/10/93 to 10/13/93
- Type of paper
: Paper in proceedings
Title: Cracks arising in main components of electrical generator
and evaluation their stability
- Authors:
- Jarić, Vladimir (105383)
- Pustaić, Dragan
Proceedings title: I Savjetovanje HK CIGRE
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 71 to 81
Meeting: I Savjetovanje HK CIGRE
Held: from 10/10/93 to 10/13/93
- Type of paper
: Paper in proceedings
Title: Selection of generators and excitation system for small
hydro power plant
- Authors:
- Vrzić, Velimir
- Zeman, Damir
- Kufner, Damir
- Sirotić, Danko (107666)
Proceedings title: I Savjetovanje HK CIGRE
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 123 to 132
Meeting: I Savjetovanje HK CIGRE
Held: from 10/10/93 to 10/13/93
Summary: On the basis of many years experience the authors have
presented the effect of required characteristics and quality of grid for
selection and design of generators and excitation system for small hydro
power plants. The paper also contains some concrete solutions.
Keywords: small power plant, synchronous generator, excitation system, induction generator
- Type of paper
: Paper in proceedings
Title: Working life of rotor rings of turbogenerator
- Authors:
- Jarić, Vladimir (105383)
- Kanižanec, Krešimir
Proceedings title: I Savjetovanje HK CIGRE
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 143 to 152
Meeting: I Savjetovanje HK CIGRE
Held: from 10/10/93 to 10/13/93
- Type of paper
: Paper in proceedings
Title: Collecting and computer analysis of test results of a
sudden short circuit of a synchronous generator
- Authors:
- Mandić, Ivan (27930)
- Kurtović, Ivan
- Radonić, Darko (84075)
Proceedings title: 36. skup JUREMA
Language: hrvatski
Place: Tuheljske Toplice, Hrvatska
Year: 1991
Pages: from 111 to 114
Meeting: 36. Skup JUREMA
- Type of paper
: Paper in proceedings
Title: Synchronous Generator Dynamic Strains During Combined
Network Disturbances
- Authors:
- Maljković, Zlatko (27746)
- Kuterovac, Ljiljana (190751)
- Editors
- Vukić, Zoran
Proceedings title: Zbornik radova 39. godišnji skup KoREMA
Language: engleski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6037-02-5
Pages: from 327 to 330
Meeting: 39. Godišnji skup KoREMA
Held: from 04/25/94 to 04/27/94
Summary: An analysis of torsional oscillations in a shaft of a
turbogenerator set is presented. Calculation of the torsional oscillations
of a turbine shaft, using a complete mathematical model, is presented for
one combined network disturbance. As an example, the influence of damping
on the subsynchronous oscillations of the shaft torques is analyzed for a
250 MVA turbine-generator. The method used to damp the oscillations
includes additional feedback signal added to generator armature voltage.
Asynchronous operating caused by the loss of the excitation is analyzed for
the same turbine-generator set, for the case with and without turbine
governor.
Keywords: synchronous generator, transient behaviour
- Type of paper
: Paper in proceedings
Title: Effect of Two-Phase Short Circuit on Turbine-Generator
Shaft
- Authors:
- Maljković, Zlatko (27746)
- Kuterovac, Ljiljana (190751)
- Editors
- Zajc, Baldomir
- Solina, Franc
Proceedings title: Zbornik tretje Elektrotehniške in računalniške konference ERK'94
Language: engleski
Place: Ljubljana, Slovenija
Year: 1994
ISBN/ISSN: 961-6062-03-4
Pages: from 425 to 428
Meeting: ERK'94 Elektrotehniška in računalniška konferenca
Held: from 09/26/94 to 09/28/94
Summary: Unsymmetrical short circuits, especially ones close to a
generator, belong to a group of faults which can result with fatigue life
expenditure of a turbine-generator shaft. The paper presents computation
results and an analysis of two-phase short circuit transients. Results of
measuring the currents and torsional torque on a 4-pole model synchronous
generator are presented. Additionaly, results of computation the transients
at line-to-line fault for turbogenerator 813 MVA (NPP Krško) are presented.
Keywords: turbine-generator set, two-phase short circuit, transient behaviour
- Type of paper
: Paper in proceedings
Title: Turbine-Generator Set Transients Caused by a Single-Phase
Short Circuit: a Comparison of Simulated and Test Results
- Authors:
- Maljković, Zlatko (27746)
- Kuterovac, Ljiljana (190751)
- Gašparac, Ivan (75402)
- Editors
- Ertan, H.Bulent
- Uctug, M. Yildirim
Proceedings title: Proc. of International Aegean Conf. on Electrical Machines and Power Electronics
Language: engleski
Place: Ankara, Turska
Year: 1995
ISBN/ISSN: 975-429-081-4
Pages: from 181 to 185
Meeting: ACEMP'95 International Aegean Conference on Electrical Machines and Power Electronics
Held: from 06/05/95 to 06/07/95
Summary: Unbalanced short circuits, especially ones close to a
generator, belong to a group of faults which, beside electrical, result
with considerable mechanical strains of a turbine-generator set and can
eventualy bring to its life expenditure. Although not the severest from the
standpoint of strains per incident, they occur more often than some more
severe disturbances and can contribute to the cumulative damaging of a
turbine-generator shaft. The paper presents the comparison of the results
of computing transient phenomena after a phase-to-neutral short circuit by
a mathematical model to the results obtained by measurements on a
laboratory model. A 2d-1q mathematical representation of a synchronous
generator usual in transient power system studies is used with addition of
a mathematical representation of motion of masses of a turbine-generator
set. Electrical and mechanical occurrences important for the evaluation of
turbine-generator strains are presented.
Keywords: synchronous generator, single-phase short circuit transients, torsional torques
- Type of paper
: Paper in proceedings
Title: Turbine-Generator Set Transients Caused by Unbalanced
Short Circuits
- Authors:
- Maljković, Zlatko (27746)
- Kuterovac, Ljiljana (190751)
- Editors
- Correia de Barros, Maria Teresa
Proceedings title: Proceedings of International Conference of Power Systems Transients IPST'95
Language: engleski
Place: Lisabon, Portugal
Year: 1995
Pages: from 221 to 226
Meeting: IPST'95 International Conference on Power Systems Transients
Held: from 09/03/95 to 09/07/95
Summary: In the paper transient phenomena at unbalanced short
circuits are analyzed. The emphasis is given to the analysis of torsional
torques in the shafts of a turbogenerator set. Measurements on a laboratory
model of a turbine-generator including a 4-pole synchronous generator and a
DC motor drive connected by a torque transducer and a flexible joint are
carried out. Adding a flexible joint natural frequencies similar to those
of large turbogenerator sets are obtained. The results of the measurements
are compared to the results of calculation by a mathematical model of a
synchronous generator completed with the equations of motion of the partial
masses of the turbine-generator set. Measured and calculated results show
that significant torsional strains are present at unbalanced short circuits
close to the generator.
Keywords: synchronous generator, unbalanced short circuits transients, torsional torques
- Type of paper
: Paper in proceedings
Title: Parameters of Permanent Magnet Synchronous Motors
- Authors:
- Berberović, Sead (57663)
- Manenica, Goran
- Maljković, Zlatko (27746)
- Editors
- Zajc, Baldomir
- Solina, Franc
Proceedings title: Zbornik tretje Elektrotehniške in računalniške konference ERK'94
Language: engleski
Place: Ljubljana, Slovenija
Year: 1994
ISBN/ISSN: 961-6062-03-4
Pages: from 421 to 424
Meeting: ERK'94 Elektrotehniška in računalniška konferenca
Held: from 09/26/94 to 09/28/94
Summary: The determination of permanent magnet synchronous motor
parameters is given in this paper. The motor has three phases winding in
the stator and arc permanent magnet pasted on the rotor. A classical
analythical procedures of rotor inertia moment, stator winding resistance
and inductance are described in details. A new technique of inductance
determination from FEM magnetic field distribution in the motor is
introduced.
- Type of paper
: Paper in proceedings
Title: Preparation and Maintenance of a Data Base for the Design
of Electrical Machines
- Authors:
- Pužar, Milica (39413)
- Tomljenović, Vesna
- Mandić, Ivan (27930)
- Editors
- Kalpić, Damir
Proceedings title: Zbornik radova 39. godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6037-02-5
Pages: from 475 to 478
Meeting: 39. Godišnji skup KoREMA
Held: from 04/25/94 to 04/27/94
Summary: An electrical machine design process represents a series of
activities carried out on the unique data base. These activities are
specific computations (eg. computation of performance of the designed
machine) and also preparation of data for calculations and output
documents, ie. description of the machine. In order to computerize the
design process it is necessary to prepare a knowledge base. It consists of
software modules for dimensioning, parameter calculation and generation of
the description of the machine, as well as the unique definition of all
parameters. These parameters are placed in the central file of the whole
system. Descriptions of different models and characteristics of diffferent
parts of machines ( in differnt languages) are also placed in system
files. As requirements on the system change constantly, the data base
requires constant updating. Organization and updating of the knowledge base
represents a complex work. Several computer programs have been produced for
the realization of this work, which are described in the paper.
- Type of paper
: Paper in proceedings
Title: The Analyses of Retardation Consequences on Turboset with
Field Current
- Authors:
- Maljković, Zlatko (27746)
- Sirotić, Zvonimir (43325)
- Ban, Drago (1914)
- Editors
- Cvetković, Zorko
- Velebir, Vesna
Proceedings title: Zbornik drugog savjetovanja HK CIGRE, Sekcija I - Oprema
Language: hrvatski
Place: Šibenik-Primošten, Hrvatska
Year: 1995
ISBN/ISSN: 953-6408-01-5
Pages: from 15 to 24
Meeting: II Savjetovanje HK CIGRE
Held: from 05/14/95 to 05/18/95
Summary: The consequences of 376 MVA turbine-generator set
retardation are analyzed. Turboset was disconnected from the network
because of electrical system disturbance but owing to field current switch
failure, excitation wasn't switched off. Using computer's program, rotor
and stator winding heating are computed and influence of overheating on
insulation is evaluated. The time of retardation and field current value
limiting are the most important factors in this case. Rotor temperature was
not higher than 159C assuming the duration of retardation with excitation
was 10 min. Stator heating was within the limits taking into account the
changing of stator losses.
Keywords: turbine-generator, losses, excitation
- Type of paper
: Paper in proceedings
Title: Quality Assurance of Rotating Machines
- Authors:
- Kuterovac, Vladimir (78486)
- Editors
- Cvetković, Zorko
- Velebir, Vesna
Proceedings title: Zbornik drugog savjetovanja HK CIGRE, Sekcija I - Oprema
Language: hrvatski
Place: Šibenik-Primošten, Hrvatska
Year: 1995
ISBN/ISSN: 953-6408-01-5
Pages: from 37 to 45
Meeting: II Savjetovanje HK CIGRE
Held: from 05/14/95 to 05/18/95
Summary: Regarding to description of the CIGRE Study Committees
activities, at the end of the year 1993 in Paris a new entry of "quality
assurance" appeared as a field of activity in STK 11 - Rotacijski strojevi.
The article discusses the possible scopes and ways of activities on the
field of contemporary quality assurance conception and other actions in the
SC 11, as well as the work organization in a small National Committee in
the frame of CIGRE.
Keywords: quality assurance, rotating machines, ISO 9000 family, Croatia Committee CIGRE
- Type of paper
: Paper in proceedings
Title: Necessity of Overspeed Test of the Electrical Rotating
Machines
- Authors:
- Jarić, Vladimir (105383)
- Kuterovac, Vladimir (78486)
- Editors
- Cvetković, Zorko
- Velebir, Vesna
Proceedings title: Zbornik drugog savjetovanja HK CIGRE, Sekcija I - Oprema
Language: hrvatski
Place: Šibenik-Primošten, Hrvatska
Year: 1995
ISBN/ISSN: 953-6408-01-5
Pages: from 47 to 54
Meeting: II Savjetovanje HK CIGRE
Held: from 05/14/95 to 05/18/95
Summary: Overspeed test is procedure which confirms the rotor
monolithism and the function of other machine parts which take part
actively. The test is performed with the highest possible expected speed
which machine can experience during operation. Specifications of the
overspeed tests are standarized by international standards. Latest edition
of IEC 34-1 1994 standard is repeating the conclusion of former editions
that overspeed test is normally considered as not necessary, but can be
performed when agreed upon and specified so between manufacturer and
customer. Therefore, the request should be pointed out regarding design of
machines withstanding the speed standarized by this standard. This report
considers elements influencing the decision on performing the overspeed
test with their comprehensiveness.
Keywords: electrical rotating machines, overspeed test, runaway speed, overspeed, risk, reliability of structure
- Type of paper
: Paper in proceedings
Title: Improvement of Design Process of Synchronous Generator
- Authors:
- Pužar, Milica (39413)
- Mandić, Ivan (27930)
- Tomljenović, Vesna
- Editors
- Cvetković, Zorko
- Velebir, Vesna
Proceedings title: Zbornik drugog savjetovanja HK CIGRE, Sekcija I - Oprema
Language: hrvatski
Place: Šibenik-Primošten, Hrvatska
Year: 1995
ISBN/ISSN: 953-6408-01-5
Pages: from 65 to 71
Meeting: II Savjetovanje HK CIGRE
Held: from 05/14/95 to 05/18/95
Summary: A design of a synchronous generator consists of a series of
actions by which the generator is dimensioned, its parameters are computed
and design documentation produced. For a large generator, it is almost
always necessary to make new design according to customer requests. These
requests are becoming more and more detailed and stringent, and terms for
the design and tendering documentation production are shorter. In many
cases the machine is designed only to make commercial offer, and the
machine is never built. Regardless to this, high quality technical
documentation is expected. If the ofer is accepted, a little can be changed
afterwards. It is therefore important to make the best possible design at
this stage. In this process the use of computers has become necessary, and
the best solution represent incorporation of different design processes
into a unified information system. Such system enables simple data input,
computation and presentation of different parameters and also survey and
use of data and solutions of earlier designs. The design and documentation
production process is accelerated. The designer communicates with the
system interactively, by means of menus and data editors. The requests upon
the designer regarding the knowledge about software system configuration
are minimal.
- Type of paper
: Paper in proceedings
Title: Experimental Determination of Brushless DC Motor
Parameters
- Authors:
- Gašparac, Ivan (75402)
- Ban, Drago (1914)
- Maljković, Zlatko (27746)
- Editors
- Jakopović, Željko (111672)
- Kovačić, Zdenko
Proceedings title: Zbornik radova 40. jubilarni godišnji skup KoREMA
Language: engleski
Place: Zagreb
Year: 1995
ISBN/ISSN: 953-6037-08-4
Pages: from 571 to 574
Meeting: 40. Jubilarni godišnji skup KoREMA
Held: from 04/19/95 to 04/21/95
Summary: The article deals with a method of determining the
inductance and electrical time constant of electronically commutated motors
provided with permanent magnets on the rotor. By recording and analyzing
the current response of a stator winding connected to a constant voltage
source, the values of inductance and time constant necessary for the
analysis of motor behaviour in transient conditions are obtained. The
experiment was carried out for direct and quadrature position of stator
winding axis in relation to the axis of the permanent magnet on the rotor.
The measurement results obtained on a concrete brushless DC motor are
presented.
Keywords: brushless DC (electronically commutated) motor, inductances, time constants
- Type of paper
: Paper in proceedings
Title: One Solution of Electrical Drive of Bicycle
- Authors:
- Nevešćanin, Mate
- Maljković, Zlatko (27746)
- Miletić, Marinko (87633)
- Ban, Drago (1914)
- Gašparac, Ivan (75402)
- Editors
- Benčić, Zvonko (3062)
- Perić, Nedjeljko
- Rajković, Borivoje
- Srb, Neven
Proceedings title: Proc. of the 8th International Conf. on Electrical Drives and Power Electronics
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6037-04-1
Pages: from 283 to 286
Meeting: EDPE'94 8th International Conference on Electrical Drives and Power Electronics
Held: from 09/12/94 to 09/14/94
Summary: In the paper some solution of additional bicycle electrical
drive are presented. Permanent magnet synchronous motor drive connected
with drive wheel through cog-wheels and chains system is described in
detail. Characteristics of motor and transistor-converters which represnted
energy part of this electromotor drive are described.
Keywords: bicycle drive, permanent-magnet synchronous motor
- Type of paper
: Paper in proceedings
Title: A Computerised Design Process of Large Electrical
Generators
- Authors:
- Mandić, Ivan (27930)
- Pužar, Milica (39413)
- Tomljenović, Vesna
- Editors
- Čerić, Vlatko
- Hljuz-Dobrić, Vesna
Proceedings title: Proc. of the 16th International Conference on Information Technology Interfaces
Language: engleski
Place: Pula
Year: 1994
ISBN/ISSN: 1330-1012
Pages: from 331 to 334
Meeting: ITI'94 16th International Conference on Information Technology Interfaces
Held: from 06/14/94 to 06/17/94
Summary: The paper describes a software system for the design and
production of tendering documentation of large synchronous generators. They
are manufactured as one-of, or in small series. The range of requiremqnts
is so wide that it is necessary to make a preliminary design of the
generator upon the receipt of a request. Often, the offer may not be
accepted by the customer, and the designed generator is never built. These
preliminary designs may present a heavy workload on the designer, and the
computerisation of the process offers a valuable help.
Keywords: CAD, synchronous generators, tendering
- Type of paper
: Paper in proceedings
Title: A Methodology of Generating Documents in Electrical
Machine Design Software
- Authors:
- Mandić, Ivan (27930)
- Pužar, Milica (39413)
- Editors
- Kalpić, Damir
- Hljuz-Dobrić, Vesna
Proceedings title: Proc. of the 17th International Conference on Information Technology Interfaces
Language: engleski
Place: Pula
Year: 1995
ISBN/ISSN: 1330-1012
Pages: from 91 to 94
Meeting: ITI'95 17th International Conference on Information Technology Interfaces
Held: from 06/13/95 to 06/16/95
Summary: The paper describes methodology for the production of
technical description of the design of large electrical generators. A
standard description cannot be used for this purpose, because the designs
may differ from each other significantly.
Keywords: CAD, electrical machine, synchronous generators, tendering
- Type of paper
: M.A.
Title: Synchronous Generator at Unbalanced Short Circuits
Faculty: Fakultet elektrotehnike i računarstva Sveučilište u Zagrebu
Author: KUTEROVAC LJILJANA
Date of defense: 06/15/95
Language: hrvatski
Number of pages: 135
- Type of paper
: Mentorship
Title: Unbalanced Short Circuits of Synchronous Generator
Faculty: Fakultet elektrotehnike i računarstva Sveučilište u Zagrebu
Mentor: MALJKOVIĆ ZLATKO
Date of defense: 02/16/94
Number of pages: 125
Author: Samaržija Damir
Degree level: D.A.
- Type of paper
: Mentorship
Title: Synchronous Generator at Unbalanced Short Circuits
Faculty: Fakultet elektrotehnike i računarstva Sveučilište u Zagrebu
Mentor: MALJKOVIĆ ZLATKO
Date of defense: 06/15/95
Number of pages: 135
Author: Kuterovac mr.sc. Ljiljana
Degree level: M.A.
- Type of paper
: Survey/Study
Title: ZES 447. Work out and testing of parts of a composed
mathematical model of synchronous generator.
- Authors:
- Maljković, Zlatko (27746)
- Glavan, Boris
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 45
Language: hrvatski
- Type of paper
: Survey/Study
Title: E 5724. A mathematical model and a program for analysis of
sudden two-phase short circuit of a synchronous generator running at no
load.
- Authors:
- Čulig, Zvonko (8510)
Ordering party: ETI - Rade Končar
Institution depot: ETI - Rade Končar
Year: 1991
Number of pages: 17
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 448. Criteria for choice of pole fixing elements for
salient pole rotors.
- Authors:
- Švigir, Nikola (77156)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 24
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 450. Design of a contactless excitation systems and
theirs structures in dependence of speciality of the generator
- Authors:
- Šaban, Josip (67155)
- Erceg, Gorislav (11305)
- Sirotić, Danko (107666)
- Zeman, Damir
- Staklenac, Vitomir
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 30
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 449. A mathematical model of a contactless excitation
system for synchronous generator in a selfexcited connection with
compoundation
- Authors:
- Erceg, Gorislav (11305)
- Staklenac, Vitomir
- Sirotić, Danko (107666)
- Zeman, Damir
- Novak, Davor
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 119
Language: hrvatski
- Type of paper
: Survey/Study
Title: E 5725. Draft of multiple criterion optimization of
hydrogenerator.
- Authors:
- Petrinić, Marijan (84790)
Ordering party: ETI - Rade Končar
Institution depot: ETI - Rade Končar
Year: 1991
Number of pages: 15
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 441. An information system for generators design -
draft of the system.
- Authors:
- Mandić, Ivan (27930)
- Pužar, Milica (39413)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 23
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 442. An information system for generators desigm -
Draft of a subsystem for setting up and maintenance of knowledge data base.
- Authors:
- Pužar, Milica (39413)
- Tomljenović, Vesna
- Šindler, Miroslav (57716)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 25
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 443. An information system for generators design -
Draft of a subsystem for operative exploitation.
- Authors:
- Pužar, Milica (39413)
- Mandić, Ivan (27930)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 85
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 444. An information system for generators design -
Draft of a subsistem for making up exit documents.
- Authors:
- Mandić, Ivan (27930)
- Pužar, Milica (39413)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 13
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 445. An information system for generators design -
Subsystem for setting up and exploitation the knowledge data base - Draft
of a structure of inlet data bases for preparation of system data bases for
making up exit documents.
- Authors:
- Mandić, Ivan (27930)
- Pužar, Milica (39413)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 0
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 446. An information system for generators design -
Subsystem for operative exploitation - Draf of a modulus for definition of
exit documents.
- Authors:
- Mandić, Ivan (27930)
- Pužar, Milica (39413)
- Tomljenović, Vesna
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1991
Number of pages: 31
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 453. Draft of a multicriteria optimisation of
hydrogenerators.
- Authors:
- Petrinić, Marijan (84790)
- Kuterovac, Ljiljana (190751)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1992
Number of pages: 16
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 458. Modification of a lap winding wiring scheme.
- Authors:
- Kuterovac, Vladimir (78486)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1992
Number of pages: 32
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 466. A mathematical model and a program for analysis
of a sudden twoo-phase short circuit to ground and one-phase short circuit
of a synchronous generator running at no load.
- Authors:
- Čulig, Zvonko (8510)
- Kulčar, Zdenka
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1993
Number of pages: 19
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 467. Implementation of a hydrogenerator mathematical
model in the program for multicriteria optimisation.
- Authors:
- Petrinić, Marijan (84790)
- Kuterovac, Ljiljana (190751)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1993
Number of pages: 33
Language: hrvatski
- Type of paper
: Survey/Study
Title: ZES 447. Turbine-Generator Set Dynamic Strains at Some
Network Faults
- Authors:
- Maljković, Zlatko (27746)
- Kuterovac, Ljiljana (190751)
Ordering party: Elektrotehnički fakultet
Institution depot: Elektrotehnički fakultet
Year: 1994
Number of pages: 37
Language: hrvatski
- Type of paper
: Survey/Study
Title: Analysis of causes of frequent failures of power
transformers in 110 kV network of Elektroprijenos - Opatia distribution
area
- Authors:
- Kelemen, Tomislav (20682)
- Marušić, Ante (107554)
- Maljković, Zlatko (27746)
Ordering party: HEP Zagreb, Prijenosno područje Elektroprijenos - Opatija
Institution depot: Elektrotehnički fakultet
Year: 1995
Number of pages: 54
Language: hrvatski
- Type of paper
: Survey/Study
Title: Analysis of consequences of one abnormal state of
turbogenerator in TPP Rijeka
- Authors:
- Wolf, Radenko (54263)
- Sirotić, Zvonimir (43325)
- Maljković, Zlatko (27746)
- Ban, Drago (1914)
Ordering party: HEP - Termoelektrana Rijeka
Institution depot: Elektrotehnički fakultet
Year: 1994
Number of pages: 51
Language: hrvatski
- Type of paper
: Survey/Study
Title: Report from review of drafts and projects
- Authors:
- Maljković, Zlatko (27746)
- Sirotić, Zvonimir (43325)
- Erceg, Gorislav (11305)
- Šulc, Ivica
Ordering party: HEP Zagreb, PP HE Split, Pogon HE Zakučac
Institution depot: Elektrotehnički fakultet
Year: 1995
Number of pages: 25
Language: hrvatski
