Simulation of transients for designing multiple power filter circuits

: pp. 117-123
Lviv Polytechnic National University

The practice of operating multiple single-tuned filters in industrial power supply systems has shown that technological transformer capacitors in switching filters within the systems can cause the damage of filters. The most disturbing loads on the power supply systems are powerful AC arc furnaces. Static Var compensators used in the power supply systems contain multiple harmonic filters for harmonic mitigation and reactive power compensation. For examining the impact of the supply system and filter configuration on transient overvoltages and overcurrents in the reactor and capacitor bank of the filter during switching events, an arc furnace power supply system was chosen as an example. The transient analysis has been carried out by simulating transients within Matlab/Simulink software. In the research, the most typical switching events and harmonic impact on the transient overvoltages have been analysed. The paper focuses on the selection of ratings for capacitors and air-core reactors used in multiple single-tuned harmonic filter configurations based on the ANSI/IEEE Standards and the results of transient simulations. The comparison of reactor and capacitor bank ratings of the filter circuits selected on the base of steady state operation and transient requirements has been shown.

  1. M. Pasko and A. Lange, “Reactive Power Compen­sation and Harmonic Mitigation by Reactive Filters LC”, Przeglad Electrotechniczny, no.4, pp.126 – 129, 2010.
  2. C.-J.Chou, C.-W.Liu, J.-Y.Lee, and K.-D.Lee, “Op­timal Planning of Large Passive-Harmonic-Filters Set at High Voltage Level”, IEEE Transactions on Power Systems, vol. 15, no.1, pp. 433–441, 2000.
  3. IEEE Guide for Application and Specification of Harmonic Filters, IEEE Std 1531-2003.
  4. J.A. Bonner, et al., “Selecting Ratings For Capaci­tors And Reactors In Applications Involving Mul­tiple Single-Tuned Filters”, IEEE Transactions on Power Delivery, vol. 10, no.1, pp.547-555, 1995.
  5. R. F. Dudley et al., “Special Design Considerations for Filter Banks in Arc Furnace Installations”, IEEE Transactions on industry applications, vol. 33, no.1, 226 – 232, 1997.
  6. J.Warecki and M. Gajdzica, “Energizing Arc Fur­nace Transformer in Power Grid Involving Harmo­nic Filter Installation”, Przeglad Electrotechniczny, no.4, pp. 64 – 69, 2015.
  7. M. Gajdzica and J. Warecki, Transients in Multiple Power Filter Circuits. LAP LAMBERT Academic Publishing, 2017.
  8. IEEE Draft Standard Requirements, Terminology, and Test Code for Dry Type Air Core Series Connected Reactors, IEEE Std. P57.16/d7 – 2010. New York, USA: IEEE, 2010.
  9. IEEE Standard for Shunt Power Capacitors, IEEE Std. 18-2012, New York, USA: IEEE, 2013.