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Tytuł:
A highly accurate DFT-based parameter estimator for complex exponentials
Autorzy:
Tsui, J.
Reisenfeld, S.
Powiązania:
https://bibliotekanauki.pl/articles/309144.pdf
Data publikacji:
2006
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
frequency estimation
phase estimation
amplitude estimation
DFT-based parameter estimation
spectral estimation
digital signal processing algorithm
complex exponential parameter estimation
Opis:
A highly accurate DFT-based complex exponential parameter estimation algorithm is presented in this paper. It will be shown that for large number of samples and high signal to noise ratio (SNR), the phase estimation error variance performance is only 0.0475 dB above the Cramer-Rao lower bound (CRLB) for phase estimation with unknown frequency and phase. The amplitude estimation error variance performance was found to lay on the CRLB for amplitude estimation. Exact phase and amplitude estimation can be achieved in the noiseless case with this algorithm. The algorithm has low implementation computational complexity and is suitable for numerous real time digital signal processing applications.
Źródło:
Journal of Telecommunications and Information Technology; 2006, 1; 76-82
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new method to reduce electromagnetic interference using signal modeling
Autorzy:
Daneshvar, Milad
Parhizgar, Nasser
Oraizi, Homayoon
Powiązania:
https://bibliotekanauki.pl/articles/949874.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electromagnetic radiation
frequency response
interference
multi-component
signals
parameter modeling
transmission lines
Opis:
Controlling and reducing the radiation emitted by various systems helps the board designer improve systems’ performance. One proposed way to achieve these goals is to use an algorithm to control the radiation applied to systems. According to the executive structure of the algorithm and considering the nature of the existing signals in several components, the separation of the signal components is on the agenda of the algorithm. In fact, the goal is to create an intuitive view of the multi-component signals around the systems that enter the systems from different angles and have a detrimental effect on their performance. Using signal processing methods, we will be able to break down the signal into different components and simulate each component separately. To prevent high computational repetitions and increase simulation time in signal component analysis, by reducing the components, we reduce the number of mesh cells in the software and, using linear approximation, determine the exact position of the radiation signal applied to systems and thus the best linear relationship. The signal entry path is used to apply the rules required for prediction design.
Źródło:
Archives of Electrical Engineering; 2020, 69, 4; 829-840
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel method for separability of signal components to estimate radiation from a high-frequency subsystem
Autorzy:
Daneshvar, Milad
Parhizgar, Naser
Oraizi, Homayoon
Powiązania:
https://bibliotekanauki.pl/articles/140523.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electromagnetic interference
electromagnetic radiation
parameter estimation
multi-component signals
frequency response
radio frequency
Opis:
Specific requirements are designed and implemented in electronic and telecommunication systems for received signals, especially high-frequency ones, to examine and control the signal radiation. However, as a serious drawback, no special requirements are considered for the transmitted signals from a subsystem. Different industries have always been struggling with electromagnetic interferences affecting their electronic and telecommunication systems and imposing significant costs. It is thus necessary to specifically investigate this problem as every device is continuously exposed to interferences. Signal processing allows for the decomposition of a signal to its different components to simulate each component. Radiation control has its specific complexities in systems, requiring necessary measures from the very beginning of the design. This study attempted to determine the highest radiation from a subsystem by estimating the radiation fields. The study goal was to investigate the level of radiations received and transmitted from the adjacent systems, respectively, and present methods for control and eliminate the existing radiations. The proposed approach employs an algorithm which is based on multi-component signals, defect, and the radiation shield used in the subsystem. The algorithm flowchart focuses on the separation and of signal components and electromagnetic interference reduction. In this algorithm, the detection process is carried out at the bounds of each component, after which the separation process is performed in the vicinity of the different bounds. The proposed method works based on the Fourier transform of impulse functions for signal components decomposition that was employed to develop an algorithm for separation of the components of the signals input to the subsystem.
Źródło:
Archives of Electrical Engineering; 2019, 68, 3; 497-510
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A semiclassical model for a laser field inside an optical cavity
Autorzy:
Priyashanka, K. M.
Wijewardena Gamalath, K. A. I. L.
Powiązania:
https://bibliotekanauki.pl/articles/1194053.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Semi classical theory
cavity electric field
population inversion
pump parameter
resonance frequency
threshold population
Opis:
Treating the laser medium quantum mechanically and the laser electric field classically, a mathematical model was developed to study a laser field inside a single mode optical cavity by numerical and analytical techniques. The simulations for threshold population, population inversion and average population with electric field frequency for 500 kHz resonance frequency of the atom are presented. The gain coefficient and the pump parameter with the frequency of the cavity electric field for 1000 kHz resonance frequency of the atom were simulated. The threshold population is a minimum when the frequency of electric field is equal to the resonance frequency of the atom. The population inversion varies sinusoidal with time and the frequency of the electric field and is a maximum at the threshold frequency of the atom. The saturated laser intensity at steady state increases linearly with the pump parameter and for larger values of the pump parameter, a smaller time is needed to reach the saturation of the laser field.
Źródło:
World Scientific News; 2015, 13; 65-79
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accurate Frequency Estimation Based On Three-Parameter Sine-Fitting With Three FFT Samples
Autorzy:
Liu, X.
Ren, Y.
Chu, C.
Fang, W.
Powiązania:
https://bibliotekanauki.pl/articles/220451.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
frequency estimation
CRLB
three-parameter sine-fitting
RMSE
golden section
Opis:
This paper presents a simple DFT-based golden section searching algorithm (DGSSA) for the single tone frequency estimation. Because of truncation and discreteness in signal samples, Fast Fourier Transform (FFT) and Discrete Fourier Transform (DFT) are inevitable to cause the spectrum leakage and fence effect which lead to a low estimation accuracy. This method can improve the estimation accuracy under conditions of a low signal-to-noise ratio (SNR) and a low resolution. This method firstly uses three FFT samples to determine the frequency searching scope, then – besides the frequency – the estimated values of amplitude, phase and dc component are obtained by minimizing the least square (LS) fitting error of three-parameter sine fitting. By setting reasonable stop conditions or the number of iterations, the accurate frequency estimation can be realized. The accuracy of this method, when applied to observed single-tone sinusoid samples corrupted by white Gaussian noise, is investigated by different methods with respect to the unbiased Cramer-Rao Low Bound (CRLB). The simulation results show that the root mean square error (RMSE) of the frequency estimation curve is consistent with the tendency of CRLB as SNR increases, even in the case of a small number of samples. The average RMSE of the frequency estimation is less than 1.5 times the CRLB with SNR = 20 dB and N = 512.
Źródło:
Metrology and Measurement Systems; 2015, 22, 3; 403-416
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Algorithm for simultaneous parameter estimation of a multi-harmonic signal
Autorzy:
Petrović, P. B.
Powiązania:
https://bibliotekanauki.pl/articles/221172.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
band-limited signals
fundamental frequency and Fourier coefficient estimation
signal reconstruction
finite-impulse-response (FIR) comb filter
Opis:
Estimating the fundamental frequency and harmonic parameters is basic for signal modelling in a power supply system. Differing from the existing parameter estimation algorithms either in power quality monitoring or in harmonic compensation, the proposed algorithm enables a simultaneous estimation of the fundamental frequency, the amplitudes and phases of harmonic waves. A pure sinusoid is obtained from an input multi-harmonic input signal by finite-impulse-response (FIR) comb filters. Proposed algorithm is based on the use of partial derivatives of the processed signal and the weighted estimation procedure to estimate the fundamental frequency, the amplitude and the phase of a multi-sinusoidal signal. The proposed algorithm can be applied in signal reconstruction, spectral estimation, system identification, as well as in other important signal processing problems. The simulation results verify the effectiveness of the proposed algorithm.
Źródło:
Metrology and Measurement Systems; 2012, 19, 4; 693-702
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An identification procedure of electromagnetic parameters for an induction motor equivalent circuit including rotor deep bar effect
Autorzy:
Rolek, J.
Utrata, G.
Powiązania:
https://bibliotekanauki.pl/articles/141612.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
induction motors
equivalent circuits
parameter identification
frequency-domain analysis
genetic algorithms
Opis:
The paper presents an identification procedure of electromagnetic parameters for an induction motor equivalent circuit including rotor deep bar effect. The presented procedure employs information obtained from measurement realised under the load curve test, described in the standard PN-EN 60034-28: 2013. In the article, the selected impedance frequency characteristics of the tested induction machines derived from measurement have been compared with the corresponding characteristics calculated with the use of the adopted equivalent circuit with electromagnetic parameters determined according to the presented procedure. Furthermore, the characteristics computed on the basis of the classical machine T-type equivalent circuit, whose electromagnetic parameters had been identified in line with the chosen methodologies reported in the standards PN-EN 60034-28: 2013 and IEEE Std 112TM-2004, have been included in the comparative analysis as well. Additional verification of correctness of identified electromagnetic parameters has been realised through comparison of the steady-state power factor-slip and torque-slip characteristics determined experimentally and through the machine operation simulations carried out with the use of the considered equivalent circuits. The studies concerning induction motors with two types of rotor construction – a conventional single cage rotor and a solid rotor manufactured from magnetic material – have been presented in the paper.
Źródło:
Archives of Electrical Engineering; 2018, 67, 2; 279--291
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza toru sygnałowego flickermetru dla napięcia sieciowego zmodulowanego przebiegiem harmonicznym
Analysis of flickermeter signal chain for supply voltage modulated with harmonic waveform
Autorzy:
Wiczyński, G.
Powiązania:
https://bibliotekanauki.pl/articles/152095.pdf
Data publikacji:
2005
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
jakość napięcia
flickermeter
charakterystyka amplitudowo-częstościowa
wskaźnik Pst
power quality
amplitude-frequency characteristics
Pst parameter
Opis:
Normatywną miarą uciążliwości wahań napięcia są wskaźniki długookresowego Plt i krótkookresowego Pst migotania światła. Wartości wskaźników określane są na podstawie sygnału wyjściowego otrzymywanego z układu "Flickermetru". Tor sygnałowy tego układu jest na tyle złożony, że wyznaczenie wartości wyjściowych nie jest proste. Uznano więc za celowe przeanalizowanie kolejnych etapów przetwarzania dla harmonicznej zmienności wartości skutecznej napięcia. W wyniku uzyskano pełną charakterystykę amplitudowo-częstościową zawierającą fragmenty nie objete normalizacją normatywną.
Normalized measures of disturbances caused by light flickers resulting fromvoltage fluctuations are factors of the long-term and short-term light flickers, respectively, determinated by the flickermeter output signal. Because the signal circuit of this device is very complex, the following steps of processing were analyzed. For this purpose, the simplest case the supply voltage modulation with a harmonic signal has been selected. A segment function is used in processing realized with a simplified flickermeter circuit. The following effects of performed processing are described. A full amplitude frequency characteristic for a range over 50 Hz, which is often omitted in the literature, has been obtained.
Źródło:
Pomiary Automatyka Kontrola; 2005, R. 51, nr 9, 9; 30-33
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applicability of Park transformation for the analysis of transient performance during subsynchronous resonances
Autorzy:
Kreischer, Ch.
Kulig, S.
Göbel, C.
Powiązania:
https://bibliotekanauki.pl/articles/140498.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
subsynchronous resonances
parameter identification
equivalent circuit
standstill frequency response test
three phase short circuit test
evolutionary strategy
Opis:
Long transmission lines have to be compensated to enhance the transport of active power. But a wrong design of the compensation may lead to subsynchronous resonances (SSR). For studies often park equivalent circuits are used. The parameters of the models are often determined analytically or by a three-phase short-circuit test. Models with this parameters give good results for frequencies of 50 Hz and 100 Hz resp. 60 Hz and 120 Hz. But SSR occurs at lower frequencies what arises the question of the reliability of the used models. Therefore in this publication a novel method for the determination of Park equivalent circuit parameters is presented. Herein the parameters are determined form time functions of the currents and the electromagnetic moment of the machine calculated by transient finite-element simulations. This parameters are used for network simulations and compared with the finite-element calculations. Compared to the parameters derived by a three-phase short-circuit a significant better accuracy of simulation results can be achieved by the presented method.
Źródło:
Archives of Electrical Engineering; 2013, 62, 3; 401-415
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of selected frequency characteristics of vibration signal for the evaluation of the braking process for railway disc brake
Zastosowanie wybranych charakterystyk widmowych sygnału drganiowego do oceny procesu hamowania kolejowego hamulca tarczowego
Autorzy:
Sawczuk, W.
Powiązania:
https://bibliotekanauki.pl/articles/327880.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
railway disc brake
friction coefficient
RMS parameter of vibration accelerations
kolejowy hamulec tarczowy
współczynnik tarcia
amplituda skuteczna przyspieszeń drgań
Opis:
The article presents a new method for the evaluation of the braking process through analysis of the braking vibration during braking to stop with a permanent the analysis of temporal signals of vibration acceleration in the frequency domain. The problem of research assembled in the article was determined by estimating the braking process one value of the diagnostic parameter of the vibration signal generated by the disc braking level set during braking.
Artykuł przedstawia autorską metodę oceny procesu hamowania poprzez analizę drgań układu hamulcowego w czasie hamowań zatrzymujących dokonując analizy czasowych sygnałów przyspieszeń drgań w dziedzinie częstotliwości. Problem badawczy podejmowany w artykule określony został poprzez ocenę procesu hamowania jedną wartością parametru diagnostycznego drgań generowanych przez układ hamulca tarczowego w czasie hamowania.
Źródło:
Diagnostyka; 2015, 16, 3; 33-38
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dopasowanie wartości parametrów pomiaru cyfrowego nierówności profilu do charakteru powierzchni przedmiotu
Matching the parameter values of digital measurement to workpiece surface profile irregularities
Autorzy:
Boryczko, K.
Powiązania:
https://bibliotekanauki.pl/articles/157754.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
pomiary powierzchni
warunki pomiaru
struktura geometryczna powierzchni
analiza częstotliwościowa
surface measurement
measurement conditions
surface geometrical structure
frequency analysis
Opis:
W pracy przedstawiono dopasowanie parametrów pomiaru do rodzaju powierzchni i analizy częstotliwościowej nierówności powierzchni toczonych dla celów rozpoznawania ich głównych składowych. Podano zależności parametrów cyfrowych pomiaru nierówności warunkujące ich częstotliwościowe zakresy rozpatrywania. W podsumowaniu podano zakres analizy częstotliwościowej nierówności powierzchni z dolno- i górnopasmowymi rodzajami ograniczeń oraz wskazówki doboru parametrów pomiaru dla otrzymania właściwego zakresu analizy nierówności powierzchni.
Conditions of measurement, the analogue-to-digital conversion and the frequency analysis of turned surface irregularities for the purpose of its main components identification are presented in the paper. A range of digital parameters have been defined along with their relation to each other, specifying the ranges in which they should be used in order to measure surface irregularity (Tab.1). The parameter values obtained by digital measurement vary within specific ranges, and hence determine the surface irregularities [1, 2, 3]. For this measurement, it is essential to select proper sampling interval hp and the number of measured data N for the value and character of the irregularities measured [4, 5] (Fig.2). The method of frequency analysis for periodical surface irregularities, with the application of power spectral density and the use of fast Fourier transformation (FFT), has been presented in papers [6, 7]. The required conditions for the method presented in this paper, and the possible matching of frequency to wide-band surface irregularities are presented. The maximum frequency of the given irregularity is determined by the value of the sampling interval. Due to this fact, the sampling interval values should be selected in a way to include the low-frequency range of dominant components of the surface irregularity [8] (Fig.3). To summarise, the resulting frequency range of surface irregularities, with high and low-frequency limitations, has been given. Furthermore, the indication of the suitable selection range to capture significant surface irregularities has been included.
Źródło:
Pomiary Automatyka Kontrola; 2010, R. 56, nr 9, 9; 1063-1066
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic characteristics of the technological complex based on parallel mechanisms of kinematics
Charakterystyki dynamiczne mechanizmów technologicznych opartych na kinematyce równoległej
Autorzy:
Gurzhіj, A. A.
Strutins'kij, S. V.
Powiązania:
https://bibliotekanauki.pl/articles/258380.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
technological complex spatial system
drive
frequency response
pulse characteristic
natural frequencies
damping parameter
mathematical model
transfer function
złożony system przestrzenny
napęd
pasmo przenoszenia
charakterystyki impulsowe
częstotliwości naturalne
parametr tłumienia
model matematyczny
Opis:
The technique and results of experimental studies of dynamic characteristics of spatial Drive Systems, which includes six coordinate parallel kinematic machine and system manipulation as six coordinate table. The amplitude-frequency and impulse response relative movement of the table and platform machine based on the analysis of characteristics from the mathematical model of the spatial system drive as the transfer function and defines the numerical parameters of the model. Technological complex spatial systems, drives, frequency response, pulse characteristics, natural frequencies, damping parameters, mathematical models, transfer functions.
W artykule przedstawiono metodykę oraz wyniki badań eksperymentalnych charakterystyki dynamicznej przestrzennych systemów napędowych maszyny, na które składa się sześć współrzędnych równoległej kinematyki i manipulacji systemu. Częstotliwości i amplitudy odpowiedzi impulsowej względnego ruchu maszyny, obejmującej stolik oraz platformę ustalono na podstawie analizy cech modelu matematycznego systemowego dysku przestrzennego, który traktowano jako funkcję przenoszenia umożliwiającą zdefiniowanie parametrów numerycznych modelu.
Źródło:
Problemy Eksploatacji; 2014, 1; 57-69
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of material non-homogeneity and two parameter elastic foundation on fundamental frequency parameters of Timoshenko beams
Autorzy:
Avcar, M.
Powiązania:
https://bibliotekanauki.pl/articles/1070359.pdf
Data publikacji:
2016-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Bn
62.20.-x
62.25.Jk
89.20.Kk
Opis:
In the present study, effects of material non-homogeneity and two-parameter elastic foundation on the fundamental frequency parameters of the simply supported beams are examined. Material non-homogeneity is characterized taking into account the parabolic variations of Young's modulus and density along the thickness direction of the beam while the value of Poisson's ratio is assumed to remain constant. The foundation medium is assumed to be linear, homogeneous and isotropic, and it is modeled by the Pasternak model with two parameters for describing the reaction of the elastic foundation on the beam. At first, the equation of the motion including the effects of the material non-homogeneity and two-parameter elastic foundation is provided. Then, the solutions including fundamental frequency parameters versus various non-homogeneity, density and foundation parameters, and length to depth ratio adopting the Timoshenko beam theory as well as the Euler-Bernoulli beam theory are presented. To show the accuracy of the present results, a comparison is carried out and a good agreement is found.
Źródło:
Acta Physica Polonica A; 2016, 130, 1; 375-378
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Free Vibration Analysis of Mindlin Plates Resting on Pasternak Foundation Using Coupled Displacement Method
Autorzy:
Rajesh, K.
Saheb, K. M.
Powiązania:
https://bibliotekanauki.pl/articles/139827.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fundamental frequency parameter
Mindlin plate
linear free vibrations
computational fluid dynamics
CFD
Pasternak foundation
parametr częstotliwości podstawowej
płyta Mindlina
liniowe drgania swobodne
obliczeniowa mechanika płynów
podłoże Pasternaka
Opis:
The authors developed a simple and efficient method, called the Coupled Displacement method, to study the linear free vibration behavior of the moderately thick rectangular plates in which a single-term trigonometric/algebraic admissible displacement, such as total rotations, are assumed for one of the variables (in both X,Y directions), and the other displacement field, such as transverse displacement, is derived by making use of the coupling equations. The coupled displacement method makes the energy formulation to contain half the number of unknown independent coefficients in the case of a moderately thick plate, contrary to the conventional Rayleigh-Ritz method. The smaller number of undetermined coefficients significantly simplifies the vibration problem. The closed form expression in the form of fundamental frequency parameter is derived for all edges of simply supported moderately thick rectangular plate resting on Pasternak foundation. The results obtained by the present coupled displacement method are compared with existing open literature values wherever possible for various plate boundary conditions such as all edges simply supported, clamped and two opposite edges simply supported and clamped and the agreement found is good.
Źródło:
Archive of Mechanical Engineering; 2018, LXV, 1; 107-128
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of control parameters on synchronization stability of virtual synchronous generator
Autorzy:
Zhang, Yanxia
Cheng, Yachao
Liu, Kaixiang
Han, Yue
Powiązania:
https://bibliotekanauki.pl/articles/2172794.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
control parameter
frequency modulation coefficient
phase plane method
synchronization stability
virtual synchronous generator
Opis:
Different from the synchronization mechanism of synchronous generators, the non-synchronous generators must be synchronized with the grid through a controller. Generally, the virtual synchronous generator (VSG) control strategy is adopted for this purpose. In view of the current situation, where the control loops are not comprehensively considered in the research of the synchronization stability of the VSG, this paper considers multiple control loops, such as active frequency loops, virtual governors, power filters and current constraint control, to establish the mathematical model of the VSG and infinite system. On this basis, the correlation formula between power angle difference and control parameters is deduced. Adopting the phase plane method, the influence of different control loops and their parameters on the transient synchronization stability is analyzed. Finally, a setting principle of the frequency modulation coefficient of virtual governors is proposed, which not only meets the response speed of control systems, but also has good control performance.
Źródło:
Archives of Electrical Engineering; 2022, 71, 4; 811--828
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 31

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