Synchronous PI Decoupling Control Scheme for DVR against a Voltage Sag in the Power System

  • Published : 2004.07.01

Abstract

This paper proposes a new control strategy for the dynamic voltage restorer (DVR). It is based on a synchronous PI decoupling control strategy which features fast response time and low steady state error. Therefore, the proposed control strategy produces faster action time against voltage sag and guarantees more than enough compensation for reduced supply voltage. Experimental results, implemented with the TMS320C3${\times}$DSP control unit, are shown to validate the effectiveness of the proposed control strategy.

References

  1. AKAGI, H., 'New trends in active filters for power conditioning,' IEEE Trans. Ind. Appl., 1996, 32, (6), pp.1312-1322
  2. GREBE, T.E, 'Application of distribution system capacitor banks and their impact on power quality,' IEEE Transaction on Industry Application, 1996,32, (3), pp.714-719
  3. NELSON, R.J., WOODLEY, N.H., RAMEY, D.G., and GULACHENSKI, E.M., 'Requirement for dynamic voltage restoration to relieve distribution voltage sags,' Proc. of American Power Conf. 1995
  4. RAMACHANDARAMURTHY, V.K., FITZER, C., ARULAMPALAM,A., ZHAN, C. BARNES, M., and JENKINS, N., 'Control of a battery supported dynamic voltage restorer,'lEE Proceeding Generation, Transmission and Distribution, 2002, 149, (9), pp.533-542
  5. JAUCH, T., KARA, A., RAHMANI, M., and WESTERMANN, D., 'Power quality ensured by dynamic voltage correction,' ABB Review, 1998,4
  6. VILATHGAMUWA, M., PERERA, A.A.D.R., and CHOI, S.S., 'Performance improvement of the dynamic voltage restorer with closed-loop load voltage and current-mode control,' IEEE Trans. Power Electronics, 2002, 17, (9), pp.824-834
  7. STUMP, M.D., KEANE, G.J., and LEONG, F.K.S., 'The role of custom power products in enhancing power quality at industrial facilities,' Proceedings of IEEE EMPD, 1998, pp.507-517,1998