TY  - JOUR
AU  - Kušljević, Miodrag
AU  - Vujičić, Vladimir
AU  - Tomić, Josif
AU  - Poljak, Predrag
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7161
AB  - The use of a filter bank of IIR filters for the spectral decomposition and analysis of signals has been popular for many years. As such, a new filter-bank resonator-based structure, representing an extremely hardware-efficient structure, has received a good deal of attention. Recently, multiple-resonator (MR)-based and general cascaded-resonator (CR)-based filters have been proposed. In comparison to single-resonator-based analyzers, analyzers with a higher multiplicity of resonators in the cascade provide lower side lobes and a higher attenuation in stopbands. In previous works, it was shown that the CR-based filter bank with infinite impulse response (IIR) filters, which is numerically more efficient than one with finite impulse response (FIR) filters, is suitable for dynamic harmonic analysis. This paper uses the same approach to design complex digital filter banks. In the previous case, the optimization task referred to the frequency responses of harmonic filters. In this work, the harmonic filters of the mother filter bank are reshaped so that the frequency response of the sum (or difference, depending on the parity of the number of resonators in the cascade) of two adjacent harmonic filters is optimized. This way, an online adaptive filter base can be obtained. The bandwidth of the filters in the designed filter bank can be simply changed online by adding or omitting the output signals of the corresponding harmonics of the mother filter.
PB  - MDPI
T2  - Acoustics
T1  - IIR Cascaded-Resonator-Based Complex Filter Banks
VL  - 5
IS  - 2
SP  - 535
EP  - 552
DO  - 10.3390/acoustics5020032
ER  - 

@article{
author = "Kušljević, Miodrag and Vujičić, Vladimir and Tomić, Josif and Poljak, Predrag",
year = "2023",
abstract = "The use of a filter bank of IIR filters for the spectral decomposition and analysis of signals has been popular for many years. As such, a new filter-bank resonator-based structure, representing an extremely hardware-efficient structure, has received a good deal of attention. Recently, multiple-resonator (MR)-based and general cascaded-resonator (CR)-based filters have been proposed. In comparison to single-resonator-based analyzers, analyzers with a higher multiplicity of resonators in the cascade provide lower side lobes and a higher attenuation in stopbands. In previous works, it was shown that the CR-based filter bank with infinite impulse response (IIR) filters, which is numerically more efficient than one with finite impulse response (FIR) filters, is suitable for dynamic harmonic analysis. This paper uses the same approach to design complex digital filter banks. In the previous case, the optimization task referred to the frequency responses of harmonic filters. In this work, the harmonic filters of the mother filter bank are reshaped so that the frequency response of the sum (or difference, depending on the parity of the number of resonators in the cascade) of two adjacent harmonic filters is optimized. This way, an online adaptive filter base can be obtained. The bandwidth of the filters in the designed filter bank can be simply changed online by adding or omitting the output signals of the corresponding harmonics of the mother filter.",
publisher = "MDPI",
journal = "Acoustics",
title = "IIR Cascaded-Resonator-Based Complex Filter Banks",
volume = "5",
number = "2",
pages = "535-552",
doi = "10.3390/acoustics5020032"
}

Kušljević, M., Vujičić, V., Tomić, J.,& Poljak, P.. (2023). IIR Cascaded-Resonator-Based Complex Filter Banks. in Acoustics
MDPI., 5(2), 535-552.
https://doi.org/10.3390/acoustics5020032

Kušljević M, Vujičić V, Tomić J, Poljak P. IIR Cascaded-Resonator-Based Complex Filter Banks. in Acoustics. 2023;5(2):535-552.
doi:10.3390/acoustics5020032 .

Kušljević, Miodrag, Vujičić, Vladimir, Tomić, Josif, Poljak, Predrag, "IIR Cascaded-Resonator-Based Complex Filter Banks" in Acoustics, 5, no. 2 (2023):535-552,
https://doi.org/10.3390/acoustics5020032 . .

TY  - JOUR
AU  - Kušljević, Miodrag
AU  - Poljak, Predrag
AU  - Tomić, Josif
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5627
AB  - Merenje u nesinusoidalnim uslovima je u centru istraživanja i mnogo se napora ulaže da se pojam reaktivne snage star više od sedamdeset godina definiše na nov način. Postoji niz pristupa rešavanju problema definisanja snaga i/ili pokušaja koncipiranja merne instrumentacije za merenje snaga u sistemima naizmenične struje pod nesinusoidalnim uslovima. Jedini standard koji se odnosi na specifične zahteve za tačnost i odgovarajuće uslove testiranja u prisustvu harmonijskih izobličenja je IEEE Std. 1459-2010, koji ne daje definiciju reaktivne snage u nesinusoidalnim uslovima. Koncept ovog IEEE standarda je baziran na raz-dvajanju snage na fundamentalni i nefundamentalni deo. U literaturi su prisutne različite tehnike za imple-mentaciju standarda IEEE Std. 1459-2010. Ovaj standard je implementiran pomoću dva osnovna prilaza: (1) dvostepeni algoritam sa estimacijom harmonijskih spektara naponskog i strujnog signala u prvom koraku i računanjem nepoznatih komponenti snage u drugom koraku i (2) filterska implementacija kombinovana sa Clarke-Park transformacijom u slučaju trofaznog sistema. U radu je prikazana nova metoda za merenje električnih veličina definisanih standardom IEEE 1459-2010 koristeći drugi pristup. Ključni elementi su adaptivni pojasni i niskopropusni FIR filteri koji izdvajaju fundamentalnu i jednosmernu komponentu. U radu su korišćene tehnike oversemplinga i decimacionih filtera, čime se izbegavaju problemi vezani za osetljivost na zaokruživanje koeficijenata FIR kaskadnih filtera velikog reda, smanjuje obim numeričkih računanja i povećava tačnost merenja. Estimacija simetričnih komponenti vrši se pomoću matrice adaptivnih faznih korektora. U cilju procene performansi algoritma izvršene su računarske simulacije i dati njihovi rezultati.
AB  - In this paper, the design and implementation of a novel recursive method for the power measurement ac-cording to the IEEE Standard 1459-2010 have been described. The most important parts are adaptive band and low-pass FIR filters that extract fundamental and dc components, respectively. In addition, by using oversampling techniques and decimation filters, coefficient sensitivity problems of the large-order FIR comb cascade structure are overridden and the parameter estimation accuracy is improved. The symmetrical components are estimated through a transformation matrix of adaptive phase shifters. The effectiveness of the proposed techniques is demonstrated by simulation results.
PB  - Novi Sad : Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi
T2  - Journal on Processing and Energy in Agriculture
T1  - Electric power components estimation according to IEEE Standard 1459-2010
T1  - Merenje komponenti električne snage po standardu IEEE 1459-2010
VL  - 25
IS  - 4
SP  - 123
EP  - 130
DO  - 10.5937/jpea25-34576
ER  - 

@article{
author = "Kušljević, Miodrag and Poljak, Predrag and Tomić, Josif",
year = "2021",
abstract = "Merenje u nesinusoidalnim uslovima je u centru istraživanja i mnogo se napora ulaže da se pojam reaktivne snage star više od sedamdeset godina definiše na nov način. Postoji niz pristupa rešavanju problema definisanja snaga i/ili pokušaja koncipiranja merne instrumentacije za merenje snaga u sistemima naizmenične struje pod nesinusoidalnim uslovima. Jedini standard koji se odnosi na specifične zahteve za tačnost i odgovarajuće uslove testiranja u prisustvu harmonijskih izobličenja je IEEE Std. 1459-2010, koji ne daje definiciju reaktivne snage u nesinusoidalnim uslovima. Koncept ovog IEEE standarda je baziran na raz-dvajanju snage na fundamentalni i nefundamentalni deo. U literaturi su prisutne različite tehnike za imple-mentaciju standarda IEEE Std. 1459-2010. Ovaj standard je implementiran pomoću dva osnovna prilaza: (1) dvostepeni algoritam sa estimacijom harmonijskih spektara naponskog i strujnog signala u prvom koraku i računanjem nepoznatih komponenti snage u drugom koraku i (2) filterska implementacija kombinovana sa Clarke-Park transformacijom u slučaju trofaznog sistema. U radu je prikazana nova metoda za merenje električnih veličina definisanih standardom IEEE 1459-2010 koristeći drugi pristup. Ključni elementi su adaptivni pojasni i niskopropusni FIR filteri koji izdvajaju fundamentalnu i jednosmernu komponentu. U radu su korišćene tehnike oversemplinga i decimacionih filtera, čime se izbegavaju problemi vezani za osetljivost na zaokruživanje koeficijenata FIR kaskadnih filtera velikog reda, smanjuje obim numeričkih računanja i povećava tačnost merenja. Estimacija simetričnih komponenti vrši se pomoću matrice adaptivnih faznih korektora. U cilju procene performansi algoritma izvršene su računarske simulacije i dati njihovi rezultati., In this paper, the design and implementation of a novel recursive method for the power measurement ac-cording to the IEEE Standard 1459-2010 have been described. The most important parts are adaptive band and low-pass FIR filters that extract fundamental and dc components, respectively. In addition, by using oversampling techniques and decimation filters, coefficient sensitivity problems of the large-order FIR comb cascade structure are overridden and the parameter estimation accuracy is improved. The symmetrical components are estimated through a transformation matrix of adaptive phase shifters. The effectiveness of the proposed techniques is demonstrated by simulation results.",
publisher = "Novi Sad : Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi",
journal = "Journal on Processing and Energy in Agriculture",
title = "Electric power components estimation according to IEEE Standard 1459-2010, Merenje komponenti električne snage po standardu IEEE 1459-2010",
volume = "25",
number = "4",
pages = "123-130",
doi = "10.5937/jpea25-34576"
}

Kušljević, M., Poljak, P.,& Tomić, J.. (2021). Electric power components estimation according to IEEE Standard 1459-2010. in Journal on Processing and Energy in Agriculture
Novi Sad : Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi., 25(4), 123-130.
https://doi.org/10.5937/jpea25-34576

Kušljević M, Poljak P, Tomić J. Electric power components estimation according to IEEE Standard 1459-2010. in Journal on Processing and Energy in Agriculture. 2021;25(4):123-130.
doi:10.5937/jpea25-34576 .

Kušljević, Miodrag, Poljak, Predrag, Tomić, Josif, "Electric power components estimation according to IEEE Standard 1459-2010" in Journal on Processing and Energy in Agriculture, 25, no. 4 (2021):123-130,
https://doi.org/10.5937/jpea25-34576 . .

TY  - JOUR
AU  - Kušljević, Miodrag
AU  - Tomić, Josif
AU  - Poljak, Predrag
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5626
AB  - Liberalizacijom tržišta električne energije merenje električne snage i energije u nesinusoidalnim uslovima dobilo je veliki značaj. Ta tema je još uvek predmet aktivnih rasprava, tako da ne postoji neka generalizovana teorija koja se može uzeti kao osnova za potrebe obračuna, evaluacije kvaliteta energije, detekcije izvora harmonika i kompenzacije u energetskim sistemima. Kao posledica, postojeći standardi se odnose na sinusoidalne slučajeve i ne daju definiciju reaktivne energije (i/ili snage) u nesinusoidalnim uslovima. Slično, oni ne daju specifične zahteve za tačnost i odgovarajuće uslove testiranja u prisustvu harmonijskih izobličenja. Jedini standard koji se odnosi na ovu problematiku je IEEE Std. 1459-2010 koji ne daje definiciju reaktivne snage u nesinusoidalnim uslovima. Koncept ovog IEEE standarda je baziran na razdvajanju snage na fundamentalni i nefundamentalni deo. Ovaj prilaz separacije na fundamentalni i harmonijski deo može se primeniti na najbitnije veličine i može se iskoristiti kao indikator kvaliteta. U radu je prikazana jedna efikasna algoritamska struktura za računanje električnih veličina definisanih standardom IEEE 1459-2010. Struktura se sastoji od dva dekuplovana dela. Za estimaciju spektra napona i struje korišćena je efikasna metoda bazirana na paralelnoj strukturi rezonantnih filtera sa zajedničkom povratnom vezom. U drugom delu strukture se na osnovu poznatog spektra naponskog i strujnog signala računaju komponente snage i indikatori kvaliteta na osnovu definicija datih u standardu IEEE 1459-2010. Predloženi algoritam je pogodan za primene u realnom vremenu. Realizacijom virtualnog instrumenta baziranog na PC računaru i programskom paketu LabVIEW, u cilju procene performansi algoritma, izvršene su računarske simulacije i eksperimentalna merenja i dati njihovi rezultati.
AB  - This paper proposes an accurate and computationally efficient implementation of the IEEE Std. 1459-2010 for power measurements. An implementation is based on digital resonators embedded in a feedback loop. In the first algorithm stage, the unknown signal harmonic parameters are estimated. By this, the voltage and current signals are processed independently of each other. In the second algorithm stage, the unknown power components are estimated (calculated) based on estimated spectra. To demonstrate the performance of the developed algorithm, computer-simulated data and laboratory testing records are processed. Simple LabView implementation, based on the point-by-point processing feature, demonstrates techniques modest computation requirements and confirms that the proposed algorithm is suitable for real-time applications.
PB  - Novi Sad : Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi
T2  - Journal on Processing and Energy in Agriculture
T1  - Resonator-based metering of power components according to IEEE Standard 1459-2010
T1  - Merenje snage po standardu IEEE 1459-2010 upotrebom rezonatorskih filterskih struktura
VL  - 25
IS  - 4
SP  - 139
EP  - 147
DO  - 10.5937/jpea25-34575
ER  - 

@article{
author = "Kušljević, Miodrag and Tomić, Josif and Poljak, Predrag",
year = "2021",
abstract = "Liberalizacijom tržišta električne energije merenje električne snage i energije u nesinusoidalnim uslovima dobilo je veliki značaj. Ta tema je još uvek predmet aktivnih rasprava, tako da ne postoji neka generalizovana teorija koja se može uzeti kao osnova za potrebe obračuna, evaluacije kvaliteta energije, detekcije izvora harmonika i kompenzacije u energetskim sistemima. Kao posledica, postojeći standardi se odnose na sinusoidalne slučajeve i ne daju definiciju reaktivne energije (i/ili snage) u nesinusoidalnim uslovima. Slično, oni ne daju specifične zahteve za tačnost i odgovarajuće uslove testiranja u prisustvu harmonijskih izobličenja. Jedini standard koji se odnosi na ovu problematiku je IEEE Std. 1459-2010 koji ne daje definiciju reaktivne snage u nesinusoidalnim uslovima. Koncept ovog IEEE standarda je baziran na razdvajanju snage na fundamentalni i nefundamentalni deo. Ovaj prilaz separacije na fundamentalni i harmonijski deo može se primeniti na najbitnije veličine i može se iskoristiti kao indikator kvaliteta. U radu je prikazana jedna efikasna algoritamska struktura za računanje električnih veličina definisanih standardom IEEE 1459-2010. Struktura se sastoji od dva dekuplovana dela. Za estimaciju spektra napona i struje korišćena je efikasna metoda bazirana na paralelnoj strukturi rezonantnih filtera sa zajedničkom povratnom vezom. U drugom delu strukture se na osnovu poznatog spektra naponskog i strujnog signala računaju komponente snage i indikatori kvaliteta na osnovu definicija datih u standardu IEEE 1459-2010. Predloženi algoritam je pogodan za primene u realnom vremenu. Realizacijom virtualnog instrumenta baziranog na PC računaru i programskom paketu LabVIEW, u cilju procene performansi algoritma, izvršene su računarske simulacije i eksperimentalna merenja i dati njihovi rezultati., This paper proposes an accurate and computationally efficient implementation of the IEEE Std. 1459-2010 for power measurements. An implementation is based on digital resonators embedded in a feedback loop. In the first algorithm stage, the unknown signal harmonic parameters are estimated. By this, the voltage and current signals are processed independently of each other. In the second algorithm stage, the unknown power components are estimated (calculated) based on estimated spectra. To demonstrate the performance of the developed algorithm, computer-simulated data and laboratory testing records are processed. Simple LabView implementation, based on the point-by-point processing feature, demonstrates techniques modest computation requirements and confirms that the proposed algorithm is suitable for real-time applications.",
publisher = "Novi Sad : Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi",
journal = "Journal on Processing and Energy in Agriculture",
title = "Resonator-based metering of power components according to IEEE Standard 1459-2010, Merenje snage po standardu IEEE 1459-2010 upotrebom rezonatorskih filterskih struktura",
volume = "25",
number = "4",
pages = "139-147",
doi = "10.5937/jpea25-34575"
}

Kušljević, M., Tomić, J.,& Poljak, P.. (2021). Resonator-based metering of power components according to IEEE Standard 1459-2010. in Journal on Processing and Energy in Agriculture
Novi Sad : Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi., 25(4), 139-147.
https://doi.org/10.5937/jpea25-34575

Kušljević M, Tomić J, Poljak P. Resonator-based metering of power components according to IEEE Standard 1459-2010. in Journal on Processing and Energy in Agriculture. 2021;25(4):139-147.
doi:10.5937/jpea25-34575 .

Kušljević, Miodrag, Tomić, Josif, Poljak, Predrag, "Resonator-based metering of power components according to IEEE Standard 1459-2010" in Journal on Processing and Energy in Agriculture, 25, no. 4 (2021):139-147,
https://doi.org/10.5937/jpea25-34575 . .

TY  - CONF
AU  - Kušljević, Miodrag D.
AU  - Tomic, Josif J.
AU  - Poljak, Predrag
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2116
AB  - In this paper, a modified and improved approach to the recently proposed multiple-resonator-based observer structure for harmonic estimation has been proposed. In the previous papers, two inherent particular cases have been considered. In the first case, estimation is performed in the point located in the middle of the observation interval, and exhibits good noises and unwanted harmonics attenuation but possesses a large response delay. In the second case, the estimation point is at the end of the observation window. In this case, the filters are able to form a zero-flat phase response about the operation frequency and hence able to provide instantaneous estimates, but with large overshoots caused by resonant frequencies at the edges of the pass band, and the high level of the sidelobs. In this paper, the estimation point is shifted along the observation interval reshaping frequency responses to tradeoff between those opposite requirements. The effectiveness of the proposed algorithm is shown through simulations.
PB  - Institute of Electrical and Electronics Engineers Inc.
C3  - 19th International Symposium on Power Electronics, Ee 2017
T1  - Group-Delay-Controlled Multiple-Resonator-Based Harmonic Analysis
DO  - 10.1109/PEE.2017.8171696
ER  - 

@conference{
author = "Kušljević, Miodrag D. and Tomic, Josif J. and Poljak, Predrag",
year = "2017",
abstract = "In this paper, a modified and improved approach to the recently proposed multiple-resonator-based observer structure for harmonic estimation has been proposed. In the previous papers, two inherent particular cases have been considered. In the first case, estimation is performed in the point located in the middle of the observation interval, and exhibits good noises and unwanted harmonics attenuation but possesses a large response delay. In the second case, the estimation point is at the end of the observation window. In this case, the filters are able to form a zero-flat phase response about the operation frequency and hence able to provide instantaneous estimates, but with large overshoots caused by resonant frequencies at the edges of the pass band, and the high level of the sidelobs. In this paper, the estimation point is shifted along the observation interval reshaping frequency responses to tradeoff between those opposite requirements. The effectiveness of the proposed algorithm is shown through simulations.",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
journal = "19th International Symposium on Power Electronics, Ee 2017",
title = "Group-Delay-Controlled Multiple-Resonator-Based Harmonic Analysis",
doi = "10.1109/PEE.2017.8171696"
}

Kušljević, M. D., Tomic, J. J.,& Poljak, P.. (2017). Group-Delay-Controlled Multiple-Resonator-Based Harmonic Analysis. in 19th International Symposium on Power Electronics, Ee 2017
Institute of Electrical and Electronics Engineers Inc...
https://doi.org/10.1109/PEE.2017.8171696

Kušljević MD, Tomic JJ, Poljak P. Group-Delay-Controlled Multiple-Resonator-Based Harmonic Analysis. in 19th International Symposium on Power Electronics, Ee 2017. 2017;.
doi:10.1109/PEE.2017.8171696 .

Kušljević, Miodrag D., Tomic, Josif J., Poljak, Predrag, "Group-Delay-Controlled Multiple-Resonator-Based Harmonic Analysis" in 19th International Symposium on Power Electronics, Ee 2017 (2017),
https://doi.org/10.1109/PEE.2017.8171696 . .