Power losses of multilevel converters in terms of the number of the output voltage levels

Kashihara, Yugo; Itoh, J-I

doi:10.1109/ipec.2014.6869853

Cited by 17 publications

(9 citation statements)

References 6 publications

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“…Therefore, the semiconductor losses of only one leg in the H-bridge cell are calculated. The average value of the conduction loss during one cycle P con is given by (15) (36) .…”

Section: Calculation Of Conduction Lossmentioning

confidence: 99%

“…where V 0 is the voltage drop of the switching device when the current is zero, R is the on-resistance of the device, i B cell is the current which flows to the device, d SD is the duty of each switching device (36) . The voltage drop V 0 and the onresistance R are obtained from the datasheets.…”

Section: Calculation Of Conduction Lossmentioning

confidence: 99%

“…where w is the loss energy which is described in the datasheet, V dcd and I md are the voltage value and the current value when w is measured, f c is the carrier frequency (36) . Each switching loss in S 1 and S 2 is given by (27) and (28) respectively.…”

Section: Calculation Of Switching Loss and Recovery Lossmentioning

confidence: 99%

“…From (35), the relationship between the input voltage V in ch and the output voltage V out ch is given by (36). By substituting (36) into (34), the peak-to-peak value Δi Lpp ch and the maximum value Δi Lm ch is given by (37) and (38) respectively.…”

Section: Relationship Between Duty Of Switching Device and Ripple Curmentioning

confidence: 99%

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Design Guidelines of Circuit Parameters for Modular Multilevel Converter with H-bridge Cell

Nakanishi

Itoh

2017

IEEJ Journal IA

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This paper presents theoretical formulae for circuit parameter design as design guidelines in a step-down rectifier in a power system connected to a 6.6-kV AC power grid, where a modular multilevel converter (MMC) is applied. In particular, this paper focuses on the design of heat sinks, capacitors, and arm inductors. In addition, the worst case for each component design is shown as the first step of the converter design. First, the formula for the ripple current in the electrolytic capacitor is derived in order to evaluate the capacitor lifetime. Second, the formulae for the semiconductor losses are clarified on the basis of the analysis of the arm current. Third, the formula for the ripple current in the arm inductor is derived on the basis of the ripple current model of a chopper circuit. Finally, all formulae are verified by experiments with a miniature model. It is confirmed that theoretical values from formulae agree with the measured values with the errors lower than 12%.

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“…Therefore, the semiconductor losses of only one leg in the H-bridge cell are calculated. The average value of the conduction loss during one cycle P con is given by (15) (36) .…”

Section: Calculation Of Conduction Lossmentioning

confidence: 99%

Section: Calculation Of Conduction Lossmentioning

confidence: 99%

Section: Calculation Of Switching Loss and Recovery Lossmentioning

confidence: 99%

Section: Relationship Between Duty Of Switching Device and Ripple Curmentioning

confidence: 99%

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Design Guidelines of Circuit Parameters for Modular Multilevel Converter with H-bridge Cell

Nakanishi

Itoh

2017

IEEJ Journal IA

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“…Power loss is the most significant parameter in power system analysis and its adequate calculation directly effects the economic and technical evaluation [6], [7]. The power losses in a converter circuit comprises of conduction loss, switching loss, snubber loss, and off-state loss.…”

Section: Introductionmentioning

confidence: 99%

Power Loss Calculation in 11-Level Cascaded H-Bridge Inverter using Harmony Search Optimized Switching Scheme

Singla,

Sharma

2019

IJEAT

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Power loss is the most significant parameter in power system analysis and its adequate calculation directly effects the economic and technical evaluation. This paper aims to propose a multi-objective optimization algorithm which optimizes dc source magnitudes and switching angles to yield minimum THD in cascaded multilevel inverters. The optimization algorithm uses metaheuristic approach, namely Harmony Search algorithm. The effectiveness of the multi-objective algorithm has been tested with 11-level Cascaded H-Bridge Inverter with optimized DC voltage sources using MATLAB/Simulink. As the main objective of this research paper is to analyze total power loss, calculations of power loss are simplified using approximation of curves from datasheet values and experimental measurements. The simulation results, obtained using multi-objective optimization method, have been compared with basic SPWM, optimal minimization of THD, and it is confirmed that the multilevel inverter fired using multi- objective optimization technique has reduced power loss and minimum THD for a wide operating range of multilevel inverter.

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Real‐time implementation of transformerless dynamic voltage restorer based on T‐type multilevel inverter with reduced switch count

Rajkumar

Parthiban

Lokesh

2019

Int Trans Electr Energ Syst

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Summary This paper presents T‐type multilevel inverter topology‐based dynamic voltage restorer (DVR) with reduced switch count. In medium voltage and high‐power applications, two‐level voltage source inverters are insufficient because of more voltage stress on switches, large dv/dt, size, and cost of the filter. To overcome these problems, multilevel inverter‐based DVR is suitable, which can be directly connected to the medium voltage distribution system without injection transformer. In addition, the control of the DVR is implemented by abc to dq controller. The voltage compensation capability of the proposed DVR is enhanced by employing the in‐phase compensation technique with reduced carrier pulse width modulation scheme, and also the total harmonic distortion(THD) in the load voltage is reduced. The design and analysis of the proposed system are discussed, and its performance is validated in MATLAB/Simulink and in the OPAL‐RT real time processor.

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Power losses of multilevel converters in terms of the number of the output voltage levels

Cited by 17 publications

References 6 publications

Design Guidelines of Circuit Parameters for Modular Multilevel Converter with H-bridge Cell

Design Guidelines of Circuit Parameters for Modular Multilevel Converter with H-bridge Cell

Power Loss Calculation in 11-Level Cascaded H-Bridge Inverter using Harmony Search Optimized Switching Scheme

Real‐time implementation of transformerless dynamic voltage restorer based on T‐type multilevel inverter with reduced switch count

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