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Electrical Engineering

, Volume 100, Issue 2, pp 435–459 | Cite as

Simulation analysis of the switching of \(230\hbox { kV}\) substation shunt capacitor banks with a 6% series reactor for limiting transient inrush currents and oscillation overvoltage

  • Theerasak Patcharoen
  • Atthapol Ngaopitakkul
  • Chaichan Pothisarn
  • Monthon Leelajindakrairerk
Original Paper
  • 180 Downloads

Abstract

This paper presents the simulation and investigation of switching large shunt capacitor banks in a \(230\hbox { kV}\) Thailand substation system. Simulations are performed using PSCAD/EMTDC to determine the peak of the transient inrush currents, the oscillation overvoltage and the frequency of the inrush current. The inrush current is generated by energizing the \(4 \times 72\) Mvar, \(230\hbox { kV}\) shunt capacitor banks. The purpose is to observe and investigate the behaviour of transient inrush currents and oscillation overvoltages to ensure the safe and successful operation of shunt capacitor banks. The methodology of inrush current transient analysis and transient reduction control was studied. The proposed method for controlling system transients during capacitor energization is through the use of a switching shunt capacitor bank with a series 6% reactor. The simulation cases for transient mitigation are numerically conducted for six different cases: a base case, with a pre-insertion resistor, with a pre-insertion inductor, with a current-limiting reactor, with a series 6% reactor and using synchronous closing control. The effects of parameters such as the sizing of the current-limiting reactor, the capacitor bank rating and the short-circuit impedance of the system are investigated. The simulation results demonstrate that the switching shunt capacitor bank with a series 6% reactor is effective in reducing the high transient inrush currents and oscillation overvoltages.

Keywords

Shunt capacitor bank Inrush current Switching transients Oscillation overvoltage Current-limiting reactor 6% reactor Back-to-back capacitor switching 

Notes

Acknowledgements

The authors wish to gratefully acknowledge financial support for this research (No. KREF045507) from the King Mongkut’s Institute of Technology Ladkrabang Research fund, Thailand.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Theerasak Patcharoen
    • 1
  • Atthapol Ngaopitakkul
    • 1
  • Chaichan Pothisarn
    • 1
  • Monthon Leelajindakrairerk
    • 1
  1. 1.Faculty of EngineeringKing Mongkut’s Institute of Technology LadkrabangBangkokThailand

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