Anovel Approach to Solve Voltage Unbalance of the Dc Links In Multilevel H-Bridges Based Solid State Transformer Connected To Grid

Authors

  • M Akshitha  PG Scholar, Department of EEE, Amalapuram Institute of Management Sciences & College of Engineering
  • G Mohan Krishna  Asst Professor, Department of EEE, St Peters Engineering College, Hyderabad, Telangana, India
  • D Mohan Reddy  Professor & Principal, Amalapuram Institute of Management Sciences and College of Engineering, Mummidivaram, East Godavari District, Andhra Pradesh, India

Keywords:

Cascaded H-Bridge converter,dqvector control, solid-state transformer (SST), voltage and power balance.

Abstract

As the expansion of the dc distribution system and the augment of the penetration of distributed generations an intelligent transformer with the capability to actively supervise the power and allowing for the easy connection of the distribution resources is becoming essential. The cascaded H-bridge multilevel inverter (CHMI)-based solid state transformer (SST) has the features of immediate voltage regulation, voltage sag compensation, fault isolation, power factor correction, harmonic isolation and dc output. Acting very much like an energy router, each SST has bidirectional energy flow control potential allowing it to control active and reactive power flow and to handle the fault currents on both low- and high-voltage sides. Its large control bandwidth offers the plug-and-play feature for distributed resources to speedily recognize and respond to changes in the system. This paper proposes a 20-kVA cascaded H-Bridge multilevel converter-based SST to directly interface with 7.2-kV single-phase distribution voltage level. The SST consists of a cascaded multilevel ac/dc rectifier, dual active bridge (DAB) converters with high-frequency transformers. The DAB converter regulates the 400-V-low-voltage dc bus and added dc/ac inverters can be added to present a 60 Hz 120/240-V ac residential voltage.

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International Journal of Scientific Research in Science, Engineering and Technology

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Published

2018-02-28

Issue

Volume 4, Issue 1, January-February-2018

Section

Research Articles

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How to Cite

[1]
M Akshitha, G Mohan Krishna, D Mohan Reddy, " Anovel Approach to Solve Voltage Unbalance of the Dc Links In Multilevel H-Bridges Based Solid State Transformer Connected To Grid, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 4, Issue 1, pp.1153-1160, January-February-2018.