Improved Multi-String Inverter –Based STATCOM for High-Power Applications

Authors

  • S. Sabarisan  Department of Electrical and Electronics Engineering, SNS College of Technology, Coimbatore, Tamilnadu, India
  • Dr. R. Subramanian  Department of Electrical and Electronics Engineering, SNS College of Technology, Coimbatore, Tamilnadu, India
  • C. Ramakrishnan   Department of Electrical and Electronics Engineering, SNS College of Technology, Coimbatore, Tamilnadu, India

Keywords:

Multi-String multilevel inverter, power quality (PQ), static compensator (STATCOM).

Abstract

This Paper presents a comparative study between Cascaded Multi-level Inverter based STATCOM and Multi-String Multi-level Inverter based STATCOM and finally concludes on the possible design and implementation of the Multi-String Inverter based STATCOM for High Power applications. This conceptual design addresses the Voltage stability of the STATCOM inverters during unbalance conditions, Maximum percentage of sag voltage that can be compensated, Maximum swell voltage that can be absorbed by the STATCOM. A New control strategy is also proposed where the DC source of the inverter is controlled, rather controlling the inverter switching pulses as in any conventional system. Though this system may seem to insist more on the usage of coupling transformers, when compared to modern transformerless STATCOMs, this proposed method seems to be more economical and stable when compared to reference[1]. The THD analysis of the proposed system is also addressed for a comparative study using MATLAB SIMULINK.

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International Journal of Scientific Research in Science, Engineering and Technology

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Published

2015-04-25

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Volume 1, Issue 2, March-April-2015

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Research Articles

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How to Cite

[1]
S. Sabarisan, Dr. R. Subramanian, C. Ramakrishnan "Improved Multi-String Inverter –Based STATCOM for High-Power Applications" International Journal of Scientific Research in Science, Engineering and Technology (IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 1, Issue 2, pp.162-167, March-April-2015.