MODIFIED TOPOLOGY FOR DSTATCOM WITH REDUCED FILTER SIZE AND VSI RATING

Volume: 2    Issue: 5

Year of Publication: 2015

Pages: (7-13)

Authors: D.Niranjana Devi, S.Sangeetha

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Abstract

Design of voltage source inverter and the interfacing filter are two important issues while implementing DSTATCOM. In this paper, a new DSTATCOM topology has been proposed which reduces the rating of VSI as well as the size of interfacing filter. In order to reduce the rating of VSI, a capacitor is used in series with the interfacing filter, which reduces the dc link voltage, which in turn reduces the rating of VSI, as rating of VSI is proportional to dc link voltage. A traditional L filter is replaced with LCL filter, which reduces the size of interfacing filter. An LCL filter provides excellent switching harmonics elimination capability as compared to conventional L filter. Therefore, proposed topology will reduce weight, cost, rating, and size of the DSTATCOM as compared to conventional topology. Effectiveness of the proposed DSTATCOM topology over traditional topology is verified through MATLAB/Simulink.

References

1. J. Pomilio and S. Deckmann, “Characterization and compensation of harmonics and reactive power of residential and commercial loads,” IEEE Trans. Power Del.,vol.22,no.2, pp.1049–1055, Apr. 2007.

2. Singh and J. Solanki, “Load compensation for diesel generator-based isolated generation system employing DSTATCOM,” IEEE Trans. Ind. Appl., vol. 47, no. 1,pp. 238– 244, Jan.-Feb. 2011.

3. J. Liu, P. Zanchetta, M. Degano, and E. Lavopa, “Control design and implementation for high performance shunt active filters in aircraft power grids,” IEEE Trans. Ind. Electron., vol.59, no. 9, pp. 3604–3613, Sep. 2012.

4. George and Mahesh K. Mishra, “DSTATCOM topologies for three phase high power applications,” vol. 2, no. 2, 2010,pp. 107–124.

5. Corasaniti, M. Barbieri, P. Arnera, and M. Valla, “Hybrid active filterfor reactive and harmonics compensation in a distribution network,”IEEE Trans. Ind. Electron., vol. 56, no.3, pp. 670–677, Mar. 2009.

6. S. Karanki, N. Geddada, Mahesh K. Mishra, and B. Kumar,“A DSTATCOM topology with reduced dc-link voltage rating for load compensation with nonstiff source,” IEEE Trans.Power Electron., vol. 27, no. 3, pp. 1201–1211, Mar. 2012.

7. M. Tavakoli Bina and E. Pashajavid, “An efficient procedure to design passive LCL-filters for active power filters,” ElectricPower Systems Research, vol. 79, no. 4, pp. 606–614, 2009.

8. J. Massing, M. Stefanello, H. Grundling, and H. Pinheiro,“Adaptivecurrent control for grid-connected converters with LCL filter,” IEEETrans. Ind. Electron., vol. 59, no. 12, pp.4681–4693, Dec. 2012.330.

9. Y. Tang, P. C. Loh, P. Wang, F. H. Choo, F. Gao, and F.Blaabjerg,“Generalized design of high performance shunt active power filter with output LCL filter,” IEEE Trans. Ind.Electron., vol. 59, no. 3, pp. 1443–1452, Mar. 2012.

10. Mahesh K. Mishra and K. Karthikeyan, “An investigation on design and switching dynamics of a voltage source inverter to compensateunbalanced and nonlinear loads,” IEEE Trans.Ind.Electron., vol. 56,no. 8, pp. 2802–2810, Aug. 2009.

11. N. Mohan and T. Undeland, Power electronics: converters,applications, and design. John Wiley & Sons, 2007.

12. Y. Tang, P. C. Loh, P. Wang, F. H. Choo, and F. Gao,“Exploring inherent damping characteristic of LCL-filters for three-phase grid-connected voltage source inverters,” IEEE Trans. Power Electron., vol. 27, no. 3, pp. 1433–1443,Mar.2012.

13. Gabe, V. Montagner, and H. Pinheiro, “Design and implementation of a robust current controller for VSI connected to the grid through an LCL filter,” IEEE Trans.Power Electron., vol. 24, no. 6, pp. 1444–1452, Jun. 2009.

14. E. Wu and P. Lehn, “Digital current control of a voltage source converter with active damping of LCL resonance,”IEEE Trans. Power Electron., vol. 21, no. 5, pp. 1364–1373, Sep. 2006.

15. O. Vodyakho and C. Mi, “Three-level inverter-based shunt active powerfilter in three-phase three-wire and four-wire systems,” IEEE Trans. Power Electron., vol. 24, no. 5, pp.1350–1363, May 2009.

16. H. Akagi and R. Kondo, “A transformerless hybrid active filter using a three-level pulsewidth modulation (PWM) converter for a mediumvoltage motor drive,” IEEE Trans.Power Electron., vol. 25, no. 6, pp.1365–1374, Jun. 2010.

17. U. Rao, Mahesh K. Mishra, and A. Ghosh, “Control strategies for load compensation using instantaneous symmetrical component theory under different supply voltages,” IEEE Trans. Power Del., vol. 23, no. 4, pp.2310–2317, Oct. 2008.

18. Singh and S. Arya, “Adaptive theory-based improved linear sinusoidal tracer control algorithm for DSTATCOM,”IEEE Trans. Power Electron., vol. 28, no. 8, pp. 3768–3778, Aug. 2013.

19. Singh, P. Jayaprakash, S. Kumar, and D. Kothari, “Implementation of neural-network-controlled three-leg VSC and a transformer as three phase four-wire dstatcom,” IEEE Trans. Ind. Appl., vol. 47, no. 4, pp.1892–1901, Jul.-Aug.2011.

20. C.-S. Lam, W.-H. Choi, M.-C.Wong, and Y.-D. Han, “Adaptive dc link voltage-controlled hybrid active power filters for reactive power compensation,” IEEE Trans. Power Electron., vol. 27, no. 4, pp. 1758– 1772, Apr. 2012

21. R. de Araujo Ribeiro, C. de Azevedo, and R. de Sousa, “A robust adaptive control strategy of active power filters for power-factor correction, harmonic compensation, and balancing of nonlinear loads,” IEEE Trans. Power Electron., vol. 27, no. 2, pp. 718–730, Feb. 2012.

Keywords

DSTATCOM, dc link voltage, L filter, LCL filter, series capacitor.