A Mitigation Technique for Inrush Currents in Load Transformers for the Series Voltage Sag Compensator

Authors

  • Besta Hari Prasad JNTU ANANTHAPUR
  • Poreddy Harshavardhan Reddy JNTU ANA
  • M. Padma Lalitha JNTU ANANTHAPUR.

Keywords:

voltage sag, Flux linkage, inrush current, Transformer, power quality, voltage sag compensator.

Abstract

In many countries, high-tech manufacturers concentrate in industry parks. Survey results suggest that 92% of interruption at industrial facilities is voltage sag related. An inrush mitigation technique is proposed and implemented in a synchronous reference frame sag compensator controller. The voltage sag compensator consists of a three phase voltage source inverter and a coupling transformer for serial connection. It is the most cost effective solution against voltage sags. When voltage sag happen, the transformers, which are often installed in front of critical loads for electrical isolation, are exposed to the disfigured voltages and a DC offset will occur in its flux linkage. When the compensator restores the load voltage, the flux linkage will be driven to the level of magnetic saturation and severe inrush current occurs. The compensator is likely to be interrupted because of its own over current protection. This paper proposes an inrush current mitigation technique together with a state-feedback controller for the Voltage sag compensator.

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Author Biographies

Besta Hari Prasad, JNTU ANANTHAPUR

ELECTRICAL & ELECTRONICS ENGINEERING . AITS, RAJAMPET

Poreddy Harshavardhan Reddy, JNTU ANA

ELECTRICAL & ELECTRONICS ENGINEERING. AITS, RAJAMPET

M. Padma Lalitha, JNTU ANANTHAPUR.

ELECTRICAL & ELECTRONICS ENGINEERING. AITS, RAJAMPET

References

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Published

01.04.2014

How to Cite

Prasad, B. H., Reddy, P. H., & Lalitha, M. P. (2014). A Mitigation Technique for Inrush Currents in Load Transformers for the Series Voltage Sag Compensator. International Journal of Intelligent Systems and Applications in Engineering, 2(2), 16–21. Retrieved from https://ijisae.org/index.php/IJISAE/article/view/55

Issue

Section

Research Article