Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Strategies of voltage controllers in delta-connected H-bridge STATCOMs

  • Son, Gum Tae (HVDC Solution, LSIS Co., Ltd) ;
  • Baek, Seung-Mook (Division of Electrical, Electronic, and Control Engineering, Kongju National University)
  • Received : 2019.09.04
  • Accepted : 2019.10.21
  • Published : 2020.01.20
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Abstract

This paper presents strategies for a voltage controller in which droop control and var reserve control (an auxiliary controller) are included in delta-connected H-bridge STATCOM. To supply the linear property and load sharing effect, the droop control has been applied to a voltage controller. In addition, the var reserve control has been chosen to enlarge the output margin depending on the dead band range. According to the installation environment, the two auxiliary controllers are chosen. However, the combination control of two auxiliary inputs has not been determined. In this paper, three different control strategies (combination methods) are proposed, and the trajectory of equilibrium point is identified. The three combination methods are implemented from HILS tests.

Keywords

Acknowledgement

This work was supported by a research grant from Kongju National University in 2019.

References

  1. Yonezawa, H., Shimato, T., Tsukada, M., Matsuno, K., Iyoda, I., Paserba J.J., Reed G.F.: Study of a STATCOM application for voltage stability evaluated by dynamic PV curves and time simulations, In: Proc. Power Engineering Society Winter Meeting, 2000
  2. Dixon, J., Moran, L., Rodriguez, J., Domke, R.: Reactive power compensation technologies: state-of-the-art review. Proc. IEEE, vol. 93, no. 12, 2005
  3. Guerrero, J.M., Loh, P.C., Lee, T.-L., Chandorkar, M.: Advanced control architectures for intelligent microgrids-Part II: power quality, energy storage, and AC/DC microgrids. IEEE Trans. Ind. Electron. 60(4), 1263-1270 (2013)
  4. Qiao, W., Venayagamoorthy, G.K., Harley, R.G.L.: Real-time implementation of a STATCOM on a wind farm equipped with doubly fed induction generator. IEEE Trans. Ind. Appl. 45(1), 98-107 (2009) https://doi.org/10.1109/TIA.2008.2009377
  5. Kundur, P.: Power system stability and control. McGraw-Hill, Emeryville (1993)
  6. Akagi, H.: Classification, terminology, and application of the modular multilevel cascade converter (MMCC). IEEE Trans. Power Electron. 26(11), 3119-3130 (2011) https://doi.org/10.1109/TPEL.2011.2143431
  7. Son, G.T., Lee, H.-J., Nam, T.S., Chung, Y-.H., Lee, U-.H., Baek, S-.T., Hur, K., Park, J.-W.: Design and control of a modular multilevel HVDC converter with redundant power modules for noninterruptible energy transfer. IEEE Trans. Power Deliv. 27(3), 1611-1619 (2012) https://doi.org/10.1109/TPWRD.2012.2190530
  8. Jung, J.-J., Lee, J.-H., Sul, S.-K., Son, G.T., Chung,Y.-H.: DC capacitor voltage balancing control for delta-connected cascaded h-bridge STATCOM considering the unbalanced grid and load conditions. In Proc. 2016 IEEE Energy Conversion Congress and Exposition, 1-8, 2016
  9. Son, G.T., Park, J.-W.: Current Limit Strategy of Voltage Controller of Delta-Connected H-Bridge STATCOM under Unbalanced Voltage Drop. J. Electr. Eng. Technol. 13, 2 (2018)
  10. Hingorani, N., GyuGyi, L.: Understanding FACTS concepts and technology of flexible AC transmission systems. Wiley, New York (2002)
  11. CIGRE WG 14.19, "STATIC Synchronous compensator (STATCOM), August 2000