Capacitor voltage balancing with Reduction of Arm current and THD control of MMC: A modified triangular injection approach.

Authors

  • Md. Abul Munjer Begum Rokeya University, Rangpur-5404
  • Md. Rafiqul Islam Sheikh Rajshahi University of Engineering & Technology, Rajshai-6204,
  • Venkatesh Boddapati Boddapati BMS College of Engineering, Bengaluru, Karnataka, India,
  • Md. Akramul Alim University of Rajshahi, Rajshai-6204,

Abstract

For high power applications, in recent time, multilevel converter has become popular because of the composition of a number of DC sources. In both variable and controllable frequency system, stair voltage output waveform of this type of converter is controllable. Different types of DC sources like as batteries, fuel cells, solar cell, wind and micro turbines are used in Modular Multilevel Converter (MMC) topology has been popular in the distributed energy resources area. Harmonic profile of a converter with a modulation scheme much depends on the carrier frequency used in it. On the other hand, with the control of Total Harmonic Distortion (THD), the arm current control is also the necessity to drive an MMC in smooth operation. Imbalance of the SM capacitor voltage affect the arm current as well as the life time of the capacitor. In this way the overall performance of the converter could be affected. As a result, several efforts of research in this area focuses on to minimize THD, to balance the capacitor voltage of Sub-module (SM) and to control the arm current of the converter. This paper proposed a modified triangular injection modulation structure for MMC converters to maintains minimum harmonic profile as well as to achieve lower arm current and capacitor voltage balancing of SM within a single algorithm structure. Some well-known modulation methods are compared with proposed method so that percentage of THD and arm current can be identified as minimum and quality of the output voltage is better.

References

M. A. Munjer, M. R. I. Sheikh, M. A. Alim, V. Boddapati, and M. A. Musaib, "Minimization of THD for Multilevel Converters with triangular injection approach," 2018 3rd International Conference for Convergence in Technology (I2CT), Pune, 2018, pp. 1-4.

Li, B., Yang, R., Xu, D., Wang, G., & Wang, W. “Analysis of the Phase-Shifted Carrier Modulation for Modular Multilevel Converters”, IEEE transaction of Power Electronics, Jan 2014.

N. V. Nguyen, B. X. Nguyen, and H. H. Lee, “An optimized discontinuous PWM method to minimize switching loss for multilevel inverters,” IEEE Trans. Ind. Electron., vol. 58, no. 9, pp. 3958–3966, Sep. 2011.

T. D. Nguyen, J. Hobraiche, N. Patin, G. Friedrich, and J. Vilain, “A direct digital technique implementation of general discontinuous pulse width modulation strategy,” IEEE Trans. Ind. Electron., vol. 58, no. 9, pp. 4445–4454, Sep. 2011.

Ghazal Falahi, Wensong Yu, Alex. Q. Huang, “THD Minimization of Modular Multilevel Converter With Unequal DC Values” IEEE Energy Conversion Congress and Exposition (ECCE) September 2014): pp. 2153-5158.

BARIŞ ÇİFTÇİ , “Selection of suitable PWM switching and control methods for modular multilevel converter drives” M. Sc thesis, Middle East Technical University, December 2014.

S. Allebrod.; R. Hamerski.; R. Marquardt., "New transformerless, scalable Modular Multilevel Converters for HVDC- transmission," Power Electronics Specialists Conference, June 2008.

Saeedifard, Maryam, and Reza Iravani. "Dynamic performance of a modular multilevel back-to-back HVDC system." Power Delivery, IEEE Transactions on 25.4 (2010): 2903-2912.

M. R. Islam, Y. G. Guo, and J. G. Zhu, “A high-frequency link multilevel cascaded medium-voltage converter for direct grid integration of renewable energy systems,” IEEE Trans. Power Electron., vol. 29, no. 8, pp. 4167–4182, Aug. 2014.

M. A. Munjer, M. R. I. Sheikh, M. A. Alim, V. Boddapati and M. A. Musaib, " Minimization of THD for MMC with triangular injection approach" International Conference on Electrical, Electronics, Computers, Communication, Mechanical and Computing (EECCMC-2018), Tamil Nadu, India, 2018.

BARIŞ ÇİFTÇİ , “Selection of suitable PWM switching and control methods for modular multilevel converter drives” M. Sc thesis, Middle East Technical University, pp. 7-8, December 2014.

S. Sedghi, A. Dastfan, and A. Ahmadyfard, "A new multilevel carrier based pulse width modulation method for modular multilevel inverter," Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on, pp.1432-1439, May 30 - June 3 2011.

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Published

2020-10-30

How to Cite

Munjer, M. A., Sheikh, M. R. I., Boddapati, V. B., & Alim, M. A. (2020). Capacitor voltage balancing with Reduction of Arm current and THD control of MMC: A modified triangular injection approach. International Journal of Electrical Engineering and Applied Sciences (IJEEAS), 3(2), 27–34. Retrieved from https://ijeeas.utem.edu.my/ijeeas/article/view/5938

Issue

Vol. 3 No. 2 (2020): Electrical Engineering and Applied Sciences

Section

Power Electronics, Machine Design and Drives

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