Dead time compensation for grid-connected PWM inverter

Han, Sang-Hyub; Jo, Tack-Hyun; Park, Jong-Hyoung; Kim, Heung-Geun; Chun, Tae-Won; Nho, Eui‐Cheol

doi:10.1109/icpe.2011.5944633

Cited by 12 publications

(12 citation statements)

References 10 publications

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“…In the past, various methods have been proposed, especially for single and three-phase systems, where dead-time compensation has been made possible by the means of calculating and compensating the voltage error [13][14][15], or by the use of current control methods [10], [16] knowledge of the system parameters and the phase current polarity, which causes difficulties in implementation. An interesting modification of the method was presented in [17] where the output from the d-axis PI controller was used to estimate the voltage error that needs to be compensated.…”

Section: B Dead-time Compensationmentioning

confidence: 99%

Current Control Methods for an Asymmetrical Six-Phase Induction Motor Drive

Seng

Levi

Jones

et al. 2014

IEEE Trans. Power Electron.

237

188

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Abstract-Using the vector space decomposition (VSD) approach, the currents in a multiphase machine with distributed winding can be decoupled into the flux and torque producing α-β components, and the loss-producing x-y and zero-sequence components. While the control of α-β currents is crucial for flux and torque regulation, control of x-y currents is important for machine/converter asymmetry and dead-time effect compensation. In this paper, an attempt is made to provide a physically meaningful insight into current control of a six-phase machine, by showing that the fictitious x-y currents can be physically interpreted as the circulating currents between the two three-phase windings. Using this interpretation, the characteristics of x-y currents due to the machine/converter asymmetry can be analysed. The use of different types of x-y current controllers for asymmetry compensation and suppression of dead time induced harmonics is then discussed. Experimental results are provided throughout the paper, to underpin the theoretical considerations, using tests on a prototype asymmetrical six-phase induction machine.

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Section: B Dead-time Compensationmentioning

confidence: 99%

Current Control Methods for an Asymmetrical Six-Phase Induction Motor Drive

Seng

Levi

Jones

et al. 2014

IEEE Trans. Power Electron.

237

188

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“…1). VSIs produce a distortion of the output voltage with respect to the commanded voltage, mainly due to the blanking time (dead-time) needed for safe commutation within each inverter leg [19][20][21][22][23][24]. Though other effects due to the non-ideal behavior of the switches (turn-on/turn-off time and voltage drop on the diodes and power switches,…) also influence, they are less important.…”

Section: Introductionmentioning

confidence: 99%

“…Though other effects due to the non-ideal behavior of the switches (turn-on/turn-off time and voltage drop on the diodes and power switches,…) also influence, they are less important. The distortion due to the inverter dead-time is known to be a function of the inverter current sign [22,23], -5 th , 7 th … harmonics of the fundamental frequency being typically produced due to this effect [19,21].…”

Section: Introductionmentioning

confidence: 99%

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Islanding detection in grid-connected power converters using harmonics due to the non-ideal behavior of the inverter

Reigosa

Briz

Blanco

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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This paper analyzes the use of the voltage distortions in PWM voltage-source-inverters (VSIs) caused by the non-ideal behavior of the inverter for islanding detection purposes. The non-ideal characteristic of the inverters, mainly due to the dead-time needed to have safe commutations, produces fundamental frequency dependent harmonics (-5th, 7th…) in the output voltage. Although these harmonics are in principle an unwanted effect, since they reduce the power quality, they can potentially be used for islanding detection purposes. The physical principles of the method would be the same as for high frequency signal injection methods that have already been proposed but without the need of injecting a high frequency signal. 1

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“…데드타임 보상 전의 크기는 피크 전류에 따라 좌우 되는데 이를 테이블을 사용하여 보상함으로써 개선된 성능의 데드타임 보상기법을 구현하였다. 다른 기법으로 는 데드타임에 의한 맥동을 적분기를 통해 그 크기를 검출하여 전향보상하는 기법과 적응 제어기를 통한 데 드타임 보상기법을 소개하였다 [7]- [10] . 하지만 이러한 논 문들에서는 직류단 전압 변동에 따른 보상기법의 동작 특성에 대해서는 언급되지 않았다.…”

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Dead time Compensation of Single-phase Grid-connected Inverter Using SOGI

Seong¹,

Lee²,

Kim³

2017

The Transactions of the Korean Institute of Power Electronics

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This study proposes a compensation method for the dead-time effects on a single-phase grid-connected inverter. Dead time should be considered in the pulse-width modulation gating signals to prevent the simultaneous conduction of switching devices, considering that a switching device has a finite switching time. Consequently, the output current of the grid-connected inverter contains odd-numbered harmonics because of the dead time and the nonlinear characteristics of the switching devices. The effects of dead time on output voltage and current are analyzed in this study. A new compensation algorithm based on second-order generalized integrator is also proposed to reduce the dead-time effect. Simulation and experimental results validate the effectiveness of the proposed compensation algorithm.

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Dead time compensation for grid-connected PWM inverter

Cited by 12 publications

References 10 publications

Current Control Methods for an Asymmetrical Six-Phase Induction Motor Drive

Current Control Methods for an Asymmetrical Six-Phase Induction Motor Drive

Islanding detection in grid-connected power converters using harmonics due to the non-ideal behavior of the inverter

Dead time Compensation of Single-phase Grid-connected Inverter Using SOGI

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