An efficiency comparison between a 18 pulses diode rectifier and a multi-cell AFE rectifier operating with FCS &amp;#x2014; MPC

Espinosa, Eduardo; Rohten, Jaime; Ramirez, Roberto; Reyes, Marcelo; Muñoz, Javier; Melín, Pedro

doi:10.1109/iecon.2014.7048657

Cited by 9 publications

(8 citation statements)

References 22 publications

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“…The diodes used in modern IGBTs are fast recovery diodes; thus, the losses due to switching on the diode are less than 1% compared to the losses due to switching off the diode [28]; they are neglected in the analysis. The loss estimation considers the IGBT switching on, the IGBT switching off, and the losses due to the diode switching off, as reviewed in [26].…”

Section: Switching Lossesmentioning

confidence: 99%

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An Efficiency Analysis of 27 Level Single-Phase Asymmetric Inverter without Regeneration

et al. 2021

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For medium voltage applications, multilevel inverters are used. One of its classic topologies is the Cascaded H-Bridge, which requires isolated DC voltages to work. Depending on the DC voltage ratio used in the Cascaded H-bridge can be classified into symmetric and asymmetric. In comparison between symmetric and asymmetric inverters, the latter can generate an AC output voltage with more output voltage levels. DC voltage ratio most documented are binary and trinary. The last can generate an AC voltage of 3n = 27 levels is obtained, using n = 3 inverters in cascade and NLM modulation, which generates a flow power of the load to the inverters (regeneration). This work analyzes the semiconductor losses (switching and conduction) and the THD of the AC output voltage in function of index modulation, considering a non-regenerative modulation technique for a 27-level single-phase asymmetric inverter. To confirm the theoretical analyzes, simulation and experimental results are shown.

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Section: Switching Lossesmentioning

confidence: 99%

“…In the fifth step, the energy dissipated is estimated in the semiconductor devices considering [26], and finally the sixth step, the efficiency is computed.…”

Section: Introductionmentioning

confidence: 99%

An Efficiency Analysis of 27 Level Single-Phase Asymmetric Inverter without Regeneration

et al. 2021

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“…The input current references contain the 17th and 19th harmonics, as shown in Figure 2a-c, in which: (i) the harmonic content in the input current in each AFE rectifier is fixed, improving a drawback that has the FCS-MPC spread spectrum, obtaining a fixed spectrum; (ii) the equipment is modular and allows the generation of input current i abc g with low THD (0.561%), from currents i abc pi of inferior quality; (iii) there is an extension of the conventional power cell of the multicell converter to the input transformer, because harmonic minimization is performed through the control scheme; and (iv) the proposed input transformer (wye-wye with K-Factor = 3.00) has a simpler design than multipulse transformers (K-Factor = 9.00) [22].…”

Section: Topology and Harmonic Cancellationmentioning

confidence: 99%

Finite Control Set—Model Predictive Control with Non-Spread Spectrum and Reduced Switching Frequency Applied to Multi-Cell Rectifiers

et al. 2021

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Multi-cell converters are widely used in medium-voltage AC drives. This equipment is based on power cells that operate with low-voltage-rating semiconductors and require an input multipulse transformer. This transformer cancels the low-frequency current harmonics generated by the three-phase diode-based rectifier. Unfortunately, this transformer is bulky, heavy, expensive, and does not extend the existing power cell (three-phase rectifier—Direct Current (DC) voltage-link—single-phase inverter) to the transformer. In this study, a harmonic cancelation method based on finite control set-model predictive control (FCS–MPC), extending the power cell’s modularity to the input transformer. On the other hand, it considers treating the two disadvantages of the FCS–MPC: High switching frequency and spread spectrum. The details were developed in theory and practice to obtain satisfactory experimental results.

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“…Fast recovery diodes are used in modern IGBTs; resulting in diode turn-on losses less than 1% compared to the diode turnoff losses [21], so they are neglected for this analysis. Then, the estimation methods will only consider the IGBT turn-on, IGBT turn-off and diode turn-off losses [22], Fig. 5.…”

Section: A Switching Lossesmentioning

confidence: 99%

Finite control set model predictive control with reduced switching frequency applied to multi-cell rectifiers

Espinosa

Rohten

Silva

et al. 2015

2015 IEEE International Conference on Industrial Technology (ICIT)

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The utilization of multi-cell converters, through the use of low voltage semiconductors, has permitted to implement medium and high voltage applications as PV farms and AC drives. In conventional AC drives, this converter requires an input multipulse transformer, which allows the low frequency harmonic cancellation that are generated by the three-phase diode rectifiers included in each cell. This multipulse transformer is bulky, heavy, expensive, and must be designed according to the number of power cells, making the transformer topology dependent. This work proposes and evaluates a harmonic minimization strategy based on a Finite Control Set -Model Predictive Control (FCS -MPC), which emulates the harmonic cancellation of a multi-pulse transformer. This feature allows the minimization of the Total Harmonic Distortion (THD) of the AC grid current of the multi-cell converter. The evaluation is focused in one disadvantage of the FCS -MPC which is its high switching frequency that causes high losses in the semiconductors.To overcome this disadvantage, an additional objective function is proposed. Simulation results prove the theory, with satisfactory results.

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An efficiency comparison between a 18 pulses diode rectifier and a multi-cell AFE rectifier operating with FCS — MPC

Cited by 9 publications

References 22 publications

An Efficiency Analysis of 27 Level Single-Phase Asymmetric Inverter without Regeneration

An Efficiency Analysis of 27 Level Single-Phase Asymmetric Inverter without Regeneration

Finite Control Set—Model Predictive Control with Non-Spread Spectrum and Reduced Switching Frequency Applied to Multi-Cell Rectifiers

Finite control set model predictive control with reduced switching frequency applied to multi-cell rectifiers

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