A Dual-Mode Modulation Technique for Controlling the Average Neutral Point Current in Neutral-Point-Clamped Converters

Beniwal, Neha; Farivar, Glen G.; Tafti, Hossein Dehghani; Pou, Josep; Ceballos, Salvador; Konstantinou, Georgios; Townsend, Christopher D.

doi:10.1109/tpel.2020.3030678

Cited by 11 publications

(18 citation statements)

References 26 publications

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Section: Introductionmentioning

confidence: 99%

“…An alternative to the hardware-based approach, is controlbased approach where different modulation techniques are used to produce ANC [6], [7], [16], [17]. Broadly, three popular ways of modulation techniques exist, direct module predictive control (MPC) [6], [7], space vector modulation (SVPWM) [17], and carrier-based modulation (CBPWM) [16]. Finite control set MPC has been employed in wind energy NPC systems in [6], [7], however, the computational complexity of this solution increases for a prediction horizon greater than one.…”

Section: Introductionmentioning

confidence: 99%

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Dual-Layer Pulsewidth Modulation Technique for Average Neutral Point Current Control in Neutral-Point-Clamped Converters

Beniwal

Farivar

Lam

et al. 2022

IEEE Trans. Power Electron.

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This paper proposes a dual-layer modulation technique that combines two-and three-level modulation techniques to control the average neutral-point current (ANC) in neutralpoint-clamped (NPC) converters. In the proposed technique, two modulation layers are employed to independently synthesize the desired ac-side voltage reference and ANC reference. The first (outer) modulating layer operates at a lower frequency and synthesizes the ANC reference from the three phase currents. It determines the duration of applying each modulation technique, based on the ANC reference and the maximum ANC injection limits of the converter. The second (inner) modulating layer operates at the switching frequency and synthesizes the three phase voltages of the NPC converter from the common dc voltages by comparing the calculated duty cycles and a carrier waveform. The proposed dual-layer modulation technique has advantages of faster dynamics and reduced mathematical computations compared to the conventional approach. The feasibility of the proposed modulation technique is demonstrated experimentally on a laboratory prototype. A detailed performance comparison among different modulation techniques is also presented.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual-Layer Pulsewidth Modulation Technique for Average Neutral Point Current Control in Neutral-Point-Clamped Converters

Beniwal

Farivar

Lam

et al. 2022

IEEE Trans. Power Electron.

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“…The challenges encountered with NPC converters vary from applications-to-applications [11,15,[33][34][35][36][37][38][39]. For systems with total dc-link voltage regulated and zero average NP current required [13, 16, 18-22, 30, 32], it is important to keep the dc-link capacitor voltages (CVs) balanced.…”

Section: Review Of Previous Researchmentioning

confidence: 99%

“…For a balanced bipolar dc-bus, such that I d1 = I d2 , no average current flows through the NP. However, a nonzero average NP current flows when unbalanced dc-loads/sources are connected to Chapter 1: Introduction 11 the bipolar dc-bus (I d1 = I d2 ) which, if not compensated, causes the CVs to diverge, and hence destabilizes the converter [38,39].…”

Section: Generation Of Nonzero Average Np Currentmentioning

confidence: 99%

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Modulation and control strategies for neutral-point-clamped converters

Beniwal¹

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I take this opportunity to express my sincere gratitude to my supervisor, Prof. Josep Pou, for his invaluable guidance, constant supervision, continuous encouragement during all the stages of this work and immense assistance in preparation of this thesis. Working under his guidance has helped me in gaining deep insight in this field of research. I am thankful to my co-supervisor Assoc. Prof. Alessandro Romagnoli and my mentor Assoc. Prof. Tang Yi for their valuable guidance and support during my PhD journey. Their extensive knowledge and helpful attitude gain my sincere admiration. I would like to express my gratitude to Prof. F. Blaabjerg for giving me the opportunity to collaborate virtually following the cancellation of my exchange at Aalborg University due to Covid. A special thanks to him for his kind effort and help during his busy schedule.

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An Improved SI-ANPC Grid-Connected Inverter Without Short-Circuit and Circulating-Current Issues

Wang

Xiao

2023

2023 IEEE International Conference on Environment and Electrical Engineering and 2023 IEEE Industrial and Commercial Power Syst

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A Dual-Mode Modulation Technique for Controlling the Average Neutral Point Current in Neutral-Point-Clamped Converters

Abstract: A dual-mode modulation technique for controlling the average neutral point current in neutral-point-clamped converters. IEEE Transactions on Power Electronics, 36(5), 6079-6091.

Cited by 11 publications

References 26 publications

Dual-Layer Pulsewidth Modulation Technique for Average Neutral Point Current Control in Neutral-Point-Clamped Converters

Dual-Layer Pulsewidth Modulation Technique for Average Neutral Point Current Control in Neutral-Point-Clamped Converters

Modulation and control strategies for neutral-point-clamped converters

An Improved SI-ANPC Grid-Connected Inverter Without Short-Circuit and Circulating-Current Issues

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