Naslov
Influence of Dead-time on Design of LCL-filter for Three-phase Voltage Source Converter

Autori
Majić, Goran ; Despalatović, Marin ; Terzić Božo ; Slutej Alojz

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
EDPE 2013 Conference Proceedings / Kolonić, Fetah ; Matuško, Jadranko - Zagreb : Hrvatsko društvo za komunikacije, računarstvo, elektroniku, mjerenja I automatiku (KoREMA), 2013, 54-60

ISBN
978-953-56937-8-9

Skup
17th International Conference on Electrical Drives and Power Electronics EDPE 2013

Mjesto i datum
Dubrovnik, Hrvatska, 02.10.2013. - 04.10.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Dead-time; harmonic analysis; LCL-filter design; pulse width modulation; voltage source converters; virtual voltage harmonic spectrum

Sažetak
Today, three-phase voltage source converters (VSC) are connected to the grid through LCL-filters. This is because the LCL-filters can achieve higher damping than L-filters for the same volume, i.e. price. For the purposes of the LCL-filter design and optimization procedures usually all nonlinearities of the converter are neglected. The dead-time is a safety measure used to prevent the simultaneous conduction of semiconductor switches in the same phase leg of a given converter. Essentially, it represents a nonlinearity introduced into the system. This paper focuses on the deadtime concept and its influence on three-phase VSC performance in steady-state. The influence of dead-time is analysed by comparing harmonic spectrums of the converter AC voltage and the current at the point of common coupling for various values of dead-time. The use of simulation model is a simple and straightforward way to carry out this analysis. The simulation results, obtained for the case of zero dead-time and double-edge naturally sampled pulse width modulation (PWM), are numerically validated by comparing harmonic spectrums with well-known analytical solutions for the selected PWM strategy. The results presented in this paper clearly show that the dead-time should not be omitted from the harmonic spectrum analysis, and from the filter design and optimization procedures. This indicates that similar analysis should be done for other nonlinearities present in the system.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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