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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29912

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Improving the Voltage Level in High Voltage Direct Current Systems by Using Modular Multilevel Converter
This paper presented an intend scheme of Modular-Multilevel-Converter (MMC) levels for move towering the practical conciliation flanked by the precision and divisional competence. The whole process is standard by a Thevenin-equivalent 133-level MMC model. Firstly the computation scheme of the fundamental limit imitation time step is offered to faithfully represent each voltage level of waveforms. Secondly the earlier industrial Improved Analytic Hierarchy Process (IAHP) is adopted to integrate the relative errors of all the input electrical factors interested in one complete virtual fault on each converter level. Thirdly the stable AC and DC ephemeral condition in virtual faults effects of all the forms stabilize and curve integral stand on the standard form. Finally the optimal MMC level will be obtained by the drown curves and it will give individual weights allowing for the precision and efficiency. And the competence and potency of the scheme are validated by model on MATLAB Simulink.
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[1] D. Jovcic and F. Jamshidi, “Phasor model of modular multilevel converter with circulating current suppression control,” IEEE Trans. Power Del., vol. 30, no. 4, pp. 1889–1897, Aug. 2015.
[2] J. Xu, A. M. Gole, and C. Zhao, “The use of averaged-value model of modular multilevel converter in dc gird,” IEEE Trans. Power Del., vol. 30, no. 2, pp. 519–528, Apr. 2015.
[3] F. B. Ajaei and R. Iravani, “Enhanced equivalent model of the modular multilevel converter,” IEEE Trans. Power Del., vol. 30, no. 2 1, pp. 666–673, Apr. 2015.
[4] R. Zeng, L. Xu, L. Yao, and B. W. Williams, “Design and operation of a hybrid modular multilevel converter,” IEEE Trans. Power Electron., vol. 30, no. 3, pp. 1137–1146, Mar. 2015.
[5] H. Saad et al., “Modular multilevel converter models for electromagnetic transients,” IEEE Trans. Power Del., vol. 29, no. 3, pp. 1481–1489, Jun. 2014.
[6] J. Xu, C. Zhao, W. Liu, and C. Guo, “Accelerated model of modular multilevel converters in PSCAD/EMTDC,” IEEE Trans. Power Del., vol. 28, no. 1, pp. 129–136, Jan. 2013.
[7] S. Denneti`ere, S. Nguefeu, H. Saad, and J. Mahseredjian, “Modeling of Modular Multilevel Converters for the France-Spain link,” Int. Conf. onPower Syst. Transients, IPST’13, Vancouver, Canada, July 2013.
[8] N. Ahmed, L. Angquist, S. Norrga, and H. Nee, “Validation of the continuous model of the modular multilevel converter with blocking/de-blockingcapability,” in Proc. IET Int. Conf. AC and DC Power Transm., 2012,pp.1–6.
[9] J. Peralta, H. Saad, S. Dennetiere, J. Mahseredjian, and S. Nguefeu, “Detailed and averaged models for a 401-level MMC-HVDC system,” IEEETrans. Power Del., vol. 27, no. 3, pp. 1501–1508, Jul. 2012.
[10] D. C. Ludois and G. Venkataramanan, “Simplified dynamics and control of modular multilevel converter based on a terminal behavioral model,” in Proc. IEEE Energy Convers. Congr. Expo., 2012, pp. 3520–3527.
[11] S. P. Teeuwsen, “Modeling the trans bay cable project as voltage-sourced converter with modular multilevel converter design,” in Proc. IEEE PowerEnergy Soc. Gen. Meeting, Jul. 24–29 2011, pp. 1–8.
[12] Q. Tu and Z. Xu, “Impact of sampling frequency on harmonic distortion for modular multilevel converter,” IEEE Trans. Power Del., vol. 26, no. 1, pp. 298–306, Jan. 2011.
[13] U. N. Gnanarathna, A. M. Gole, and R. P. Jayasinghe, “Efficient modeling of modular multilevel HVDC converters (MMC) on electromagnetic transient simulation programs,” IEEE Trans. Power Del., vol. 26, no. 1, pp. 316–324, Jan. 2011.
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[15] M. Saeedifard and R. Iravani, “Dynamic performance of a modular multilevel back-to-back HVDC system,” IEEE Trans. Power Del., vol. 25, no. 4, pp. 2903–2912, Oct. 2010.
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