Hybrid PWM rectifiers to reduce electromagnetic interference

Sato, Yukihiko; Kawamura, K.; Morimoto, H.; Nezu, Kazuyoshi

doi:10.1109/ias.2002.1043827

Cited by 20 publications

(21 citation statements)

References 7 publications

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“…The proposed hybrid concept shown in Fig. 1 is similar to [10] where the auxiliary inverter cancels the main current switching ripple which is a fraction of the main inverter current. With respect to the hybrid filter idea, most papers are using a Voltage Source Inverter as the auxiliary bridge which if used to synthesize currents would require a fast current controller and for that reason very fast switching.…”

mentioning

confidence: 98%

“…The problem is outlined in [21] where the concept of virtual harmonic content is introduced in order to design the LCL filter to comply with grid code requirements with the lowest possible filter size whilst [10] proposed the additional use of the computationally demanding selective harmonic elimination PWM (SHE-PWM) to eliminate harmonics up to the 29 th order to allow for higher resonant frequency placement and therefore achieve smaller filter size. Although in this paper, a more simplistic approach was taken towards the LCL filter design, the considerations are in line with existing literature [20][21][22].…”

Section: Lcl Connected Hybrid Topologymentioning

confidence: 99%

“…The Modular Multilevel Converter (MMC) proposed few years ago [6,7] has gained increased popularity in a short period of time due to its reliance on a large number of identical building blocks that would enable cost effective mass production and allow flexibility in implementing any custom design system solutions. Hybrid converter implementations have been proposed in the past to enhance the behaviour of passive filters [8,9] or to improve the waveform quality of slow converters by adding low current rated auxiliary converters [10][11][12][13][14][15][16][17].…”

Section: Index Terms-active Filters Noise Cancellation Nonlinear Fimentioning

confidence: 99%

“…The use of a series capacitor with a CSI has been investigated in [12,18] but for low voltage APF applications and in [19]for photovoltaic applications. The novelty in relation to [10] is that it addresses medium/high voltage applications and that the installed power of the auxiliary inverter is further reduced by using a series connected capacitor to cancel most of the fundamental (50Hz) AC voltage, similar to [11]. By using a current source inverter (CSI) as in [12] the circuit does not need the current controllers that a VSI would need in an active filter application, since the AC reference currents are synthetized directly, therefore, being able to switch slower for a similar current tracking performance.…”

Section: Investigations In the Modellingmentioning

confidence: 99%

See 3 more Smart Citations

Investigations in the Modeling and Control of a Medium-Voltage Hybrid Inverter System That Uses a Low-Voltage/Low-Power Rated Auxiliary Current Source Inverter

Papadopoulos

Rashed

Klumpner

et al. 2016

IEEE J. Emerg. Sel. Topics Power Electron.

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Investigations in the modelling and control of a medium voltage hybrid inverter system that uses a low voltage /low power rated auxiliary current source inverter. IEEE Journal of Emerging and Selected Topics in Power Electronics, 4 (1). pp. 126-140. ISSN 2168-6785 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/32220/1/Investigations%20in%20the%20Modelling%20and %20Control%20of%20a%20Medium%20Voltage%20Hybrid%20Inverter%20System_final %20%282%29.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk  Abstract-Hybrid converters consist of a main inverter processing the bulk of the power with poor waveform performance and a fast and versatile auxiliary inverter to correct the distortion. In this paper, the main converter is a medium voltage NPC inverter and the auxiliary inverter is a low-voltage and low-current rated current source inverter (CSI), with series capacitor being used to minimize the CSI voltage stress. The result is a high output current quality which is obtained with a very low switching stress in the main converter and a very small added installed power (<4%) in the CSI. This paper expands this concept by investigating the hybridization of a medium voltage inverter with an existing LCL filter and investigates the additional challenges related to resonances and proposes a solution for stable operation. Experimental validation of active ripple cancellation has been provided at 3kW. Index Terms-Active filters, Noise cancellation, Nonlinear filtersI. INTRODUCTION onversion of DC into AC at medium and high voltage levels has become a very important research topic now when the need to transfer very large amounts of power (GW) over long distances favour HVDC transmission systems. In the medium term it is predicted that the distribution system will remain AC which will require the use of high voltage DC/AC inverters to interface the transmission and distribution systems. Standard two-level inverters built using series connected devices were initially used in the first generation of forced commutated HVDC systems for their simplicity and the easiness to embed redundancy by adding additional devices in series; however, difficulties in achieving static and more importantly dynamic voltage sharing during switching meant that the harmonic performance of su...

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mentioning

confidence: 98%

Section: Lcl Connected Hybrid Topologymentioning

confidence: 99%

Section: Index Terms-active Filters Noise Cancellation Nonlinear Fimentioning

confidence: 99%

Section: Investigations In the Modellingmentioning

confidence: 99%

See 2 more Smart Citations

Investigations in the Modeling and Control of a Medium-Voltage Hybrid Inverter System That Uses a Low-Voltage/Low-Power Rated Auxiliary Current Source Inverter

Papadopoulos

Rashed

Klumpner

et al. 2016

IEEE J. Emerg. Sel. Topics Power Electron.

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show abstract

“…The Modular Multilevel Converter (MMC) proposed few years ago [2] has gained increased popularity in a short period of time due to its reliance on a large number of identical building blocks that would enable cost effective mass production and allow flexibility in implementing any custom design system solutions. Hybrid converter implementations have been proposed in the past to enhance the behavior of passive filters [3] or to improve the waveform quality of slow converters by adding low current rated auxiliary converters [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

A hybrid inverter system for medium voltage applications using a low voltage auxiliary CSI

Papadopoulos

Rashed

Klumpner

et al. 2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-Hybrid converters consist of a main inverter processing the bulk of the power with poor waveform performance and a fast and versatile auxiliary inverter to correct the distortion. In this paper, the main converter is a medium voltage NPC inverter and the auxiliary inverter is a low-voltage and low-current rated current source inverter (CSI), with series capacitor being used to minimize the CSI voltage stress. The result is a high output current quality which is obtained with a very low switching stress in the main converter and a very small added installed power (<4%) in the CSI. This paper expands this concept by investigating the hybridization of a medium voltage inverter with an existing LCL filter and investigates the additional challenges related to resonances and proposes a solution for stabile operation.

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A Hybrid Inverter Solution for Medium Voltage Applications using Series Capacitor and a CSI Active Power Filter (SC-APF)

Papadopoulos¹,

Rashed²,

Klumpner³

et al. 2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

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This paper proposes a new hybrid inverter solution for medium/high voltage applications that consists of a slow switching inverter using high voltage or series connected switching devices, fitted with a low kVA rated auxiliary current source inverter to cancel the switching ripple produced by the main inverter. The reduction in CSI voltage stress is obtained by connecting it to the MV grid via a series capacitor which makes the solution suitable for retrofitting older inverters equipped with large passive filters. The paper describes the design procedure, the control scheme and validates the feasibility of the idea by including simulation results and evaluation of the waveform quality and also an estimation of the semiconductor losses.

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Hybrid PWM rectifiers to reduce electromagnetic interference

Cited by 20 publications

References 7 publications

Investigations in the Modeling and Control of a Medium-Voltage Hybrid Inverter System That Uses a Low-Voltage/Low-Power Rated Auxiliary Current Source Inverter

Investigations in the Modeling and Control of a Medium-Voltage Hybrid Inverter System That Uses a Low-Voltage/Low-Power Rated Auxiliary Current Source Inverter

A hybrid inverter system for medium voltage applications using a low voltage auxiliary CSI

A Hybrid Inverter Solution for Medium Voltage Applications using Series Capacitor and a CSI Active Power Filter (SC-APF)

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