Effects of the 2&lt;sup&gt;nd&lt;/sup&gt; order harmonic leg current in a MMC converter

Bordignon, P.; Maragliano, G.; Marchesoni, M.; Vaccaro, Luis

doi:10.1109/epe.2014.6911029

Cited by 4 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regardless of this deviation, it is experimentally verified that the total cell losses can be reduced with respect to zero circulating current, with a great reduction of the energy ripple. This reduction in both objectives with respect to case A for φ = 0°has been reported in [37,38], while the always negative effect of the second harmonic on the losses for φ = 90°is observed in [39]. Regarding the energy ripple model, the voltage drop of the semiconductors is an important source of error in low-voltage MMCs, which is not taken into account by the model.…”

Section: Implementation and Experimental Resultsmentioning

confidence: 91%

Pareto Frontier of the Arm Energy Ripple and the Conduction Losses of a Modular Multilevel Converter

López¹,

Fehr²,

Pérez³

et al. 2021

Energies

View full text Add to dashboard Cite

Modular multilevel converters can achieve high power quality and voltage ratings, becoming a good alternative for high-voltage direct-current applications. However, the circulating current and capacitor voltage ripple remain significant drawbacks, mainly due to the impact on efficiency and power density. In this work, a stationary operation of a modular multilevel converter is optimized by calculating the Pareto frontier of the arm energy ripple and the conduction losses for different operating conditions. From the set of optimal solutions, the best trade-off between energy ripple and power losses can be chosen depending on the application requirements. Therefore, an optimal operating point regarding capacitor voltage ripple and circulating current was found, optimizing efficiency and allowing a reduction of capacitance, hence size and cost. The theoretical analysis and results are validated experimentally on a prototype test-bench.

show abstract

Section: Implementation and Experimental Resultsmentioning

confidence: 91%

Pareto Frontier of the Arm Energy Ripple and the Conduction Losses of a Modular Multilevel Converter

López¹,

Fehr²,

Pérez³

et al. 2021

Energies

View full text Add to dashboard Cite

show abstract

“…The dc-link capacitor voltage ripple reduction methods can be classified into three principals. The first group is the second harmonic circulating current injection method [5][6][7][8][9][10]. The second group uses the circulating current with a combination of 2nd and 4th harmonic components.…”

Section: Introductionmentioning

confidence: 99%

A DC-Link Capacitor Voltage Ripple Reduction Method for a Modular Multilevel Cascade Converter With Single Delta Bridge Cells

Tanaka

Wang

Blaabjerg

2019

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

This paper proposes a capacitor voltage ripple reduction method used for a Modular Multilevel Cascade Converter (MMCC) with Single Delta Bridge Cells (SDBC), by applying a third harmonic zero-sequence current. A practical case study on an 80 MVar/ 33 kV MMCC-SDBC based STATCOM is used to demonstrate the method. The impact of the third harmonic zero-sequence current level of the capacitor ripple reduction and the electro-thermal stresses on IGBT modules are analyzed. An optimal parameter of the current level is obtained by compromising the above performance factors. The obtained result shows that the required capacitance, as well as capacitor bank volume, are reduced by 20 % without increasing the total power semiconductor losses by using the proposed method.

show abstract

A second-order harmonic circulating current injection method for MMC capacitance reduction in offshore DC wind turbine

Xie

Tan

et al. 2021

International Journal of Electrical Power & Energy Systems

View full text Add to dashboard Cite

Effects of the 2<sup>nd</sup> order harmonic leg current in a MMC converter

Cited by 4 publications

References 4 publications

Pareto Frontier of the Arm Energy Ripple and the Conduction Losses of a Modular Multilevel Converter

Pareto Frontier of the Arm Energy Ripple and the Conduction Losses of a Modular Multilevel Converter

A DC-Link Capacitor Voltage Ripple Reduction Method for a Modular Multilevel Cascade Converter With Single Delta Bridge Cells

A second-order harmonic circulating current injection method for MMC capacitance reduction in offshore DC wind turbine

Contact Info

Product

Resources

About