(Generator synchroniczny do prób napięciem indukowanym jedno- i Keywords: synchronous generator, induced AC voltage test, power transformer. PRZETWORNICA CZĘSTOTLIWOŚCI 50/i. Generator synchroniczny GAdi. kVA, V, obr/kin, Silnik synchroniczny GAd tj. 6BO kW. W artykule wykazano że generator synchroniczny może być z powodzeniem użyty jako Keywords: distributed generation, synchronous generator, stand- alone.
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Assessment of the accuracy of synchronous generator model
Structural model of the generating unit in Matlab — Simulink environment 0. It was assumed that the generator load was close to the rated one. It can result in errors arising in the process of electromagnetic parameter estimation of a synchronous generator. It was also assumed that the generator was operating in a single-machine power system PS under a load close to the rated one [7,10,11]. The model consists of: Exemplary waveform of errors resulting from filtration of the stator voltage in the d axis Ifd, p.
Akademicka 10, Gliwice, E-mail: We invite you to work with us in the supply and maintenance of our range of generators and electrical motors. From Wikimedia Commons, the free media repository. Documents Flashcards Grammar checker. For estimation there was used the least squares method by defining the following objective function [7, 9]: In Chrome, first click on a language pair and change the search keyword in the field ‘Keyword’ to a keyword eg: Possibility of large synchronous generator parameters estimation via on-line field tests using genetic algorithm.
To avoid additional estimation errors caused by the abovementioned disturbance components, the measurement signals should be filtered.
Those waveforms were disturbed with Gaussian noise with zero mean value, thus approximately simulating the real measurement signals. Views View Edit History. There syncnroniczny examined the influence of a type and parameters of the filter used on the electromagnetic parameter estimation results of the generator model.
The least squares method was used for parameter estimation, and the gradient method was applied to minimization of the mean square error. The phenomenon of saturation of the magnetic core by the machine main field was approximately taken into account in the synchronous generator model by means of a correction being a function of the stator flux linkage absolute value .
Separating magnets and electromagnetic separators used to remove ferromagnetic elements and impurities from non-magnetic material carried on belt conveyors in mining, food and power industry. In the investigations, there was assumed that the dynamic waveforms caused by a small disturbance of the voltage regulator reference gdnerator in the form of a step change or a pseudorandom signal PRBS Pseudo Random Binary Sequence are the basis of parameter estimation .
Application of the stationary DC decay test to industrial turbogenerator model parameter estimation.
It can be seen that the maximum error is small because it does not exceed 0. It provides a constant group delay and, in consequence, does not result in a change of the filtered signal shape. This licensing tag was added to this file as part of the GFDL licensing update.
Finite and infinite impulse response, zero-phase digital filters were used for filtering the disturbed waveforms. Look at the complete list of languages: Each filter introduces a phase shift unwanted from the point of view of parameter estimation. The generating unit, including a turbine driven generator and an excitation system with a voltage regulator and a power system stabilizer, is connected to an infinite bus via a transmission line.
That is why a low-pass filter was used for filtration of the noisy waveforms. In the paper, there are presented the results of parameter estimation of the mathematical model of a synchronous generator operating in a single-machine power system. DC motors used as drives for hoisting machines in coal, metal ore and other mining industries.
Regardless of the selected measuring method, the main problem of the parameter estimation of synchronous generator mathematical models is to remove the erroneous data and to filter the disturbances from measurement waveforms.
The vapour expands through the turbine dropping significantly in generztor and temperature to state 4. Synchronous motors used as drives for hoisting machines in coal, metal ore and other generaror industries. Before performing the estimation, one should filter synchronkczny data and noise from the waveforms. Polish – English Results for: Zero-phase filtering provides elimination of the effect of the filter phase response on the signal phase angle, independently of the type of filtering.
Finally the vapour is condensed back to a liquid and fed back in the pump. Parameter estimation results for the pseudorandom signal Table 2. Similar difficulties in determining these parameters are mentioned in [11, 19].
You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Heat is added in the boiler by the burning of fuel although h. Now you can drag this link from Bookmarks to the Bookmarks Toolbar. The voltages and currents of the stator in the dq0 coordinate system as well as the field voltage and excitation current contain mainly a constant component.
In the next stage of calculations, the waveforms filtered with the use of a FIR filter designed using the time window method were the basis of estimation.
File:Rankine cycle layout PL w gen.png
Synchronous motors in standard or Ex synchronifzny Exp, Exn, Exe used as drives for fans, pumps, mills, compressors, mixers, belt conveyors and other industrial equipment. Diagram showing the basic layout of a Rankine cycle transform heat, in turbogenerators, to electric energy; Fluid is pumped to high pressure going from state 1 to 2.
generator – Wikisłownik, wolny słownik wielojęzyczny
Smaller estimation errors were obtained for the Butterworth filter. The excitation system with the voltage regulator and power system stabilizer and the turbine with its governor influenced these waveforms.
The large error of stator resistance estimation can be avoided by assuming in the computational model the resistance from the catalogue data provided by manufacturers or the resistance determined by the technical method instead of the estimation of this parameter.
Siemens Power Technologies Inc. Filtered and simulation output waveforms in the first iteration step for a disturbance in the form of the step signal Table 1.