Browse > Article
http://dx.doi.org/10.6113/JPE.2014.14.2.383

Compensation Strategy to Eliminate the Effect of Current Measurement Offsets in Grid-Connected Inverters  

Lee, Chang-Hee (Department of Electrical Eng., Kyungpook National University)
Choi, Jong-Woo (Department of Electrical Eng., Kyungpook National University)
Publication Information
Journal of Power Electronics / v.14, no.2, 2014 , pp. 383-391 More about this Journal
Abstract
For the digital control of systems such as grid-connected inverters, measuring inverter output currents accurately is essential. However, current measurement offsets are inevitably generated by current measurement paths and cause DC current components in real inverter output currents. Real inverter output currents with DC components cause the DC-link capacitor voltage to oscillate at the frequency of a utility voltage. For these reasons, current measurement offsets deteriorate the overall system performance. A compensation strategy to eliminate the effect of current measurement offsets in grid-connected inverters is proposed in this study. The validity of the proposed compensation strategy is verified through simulations and experiments. Results show that the proposed compensation strategy improves the performance of grid-connected inverters.
Keywords
Current control; Current offset; DC component; DC current injection; Grid-connected inverter; Power quality;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Mohamed Adel, Sherif Zaid, and Osama Mahgoub, "Improved active power filter performance based on an indirect current control technique," Journal of Power Electronics, Vol. 11, No. 6, pp. 931-937, Nov. 2011.   과학기술학회마을   DOI
2 J. K. Jeong, B. M. Han, J. Y. Lee, and N. S. Choi, "High-efficiency grid-tied power conditioning system for fuel cell power generation," Journal of Power Electronics, Vol. 11, No. 4, pp. 551-560, Jul. 2011.   과학기술학회마을   DOI
3 K. Kirubakaran, S. Jain, and R. K. Nema, "DSP-controlled power electronic interface for fuel-cell-based distributed generation," IEEE Trans. Power Electron., Vol. 26, No. 12, pp. 3853-3864, Dec. 2011.   DOI
4 B. Singh, K. Al-Haddad, and A. Chandra, "A review of active filters for power quality improvement," IEEE Trans. Ind. Electron., Vol. 46, No. 5, pp. 960-971, Oct. 1999.
5 K. H. Kwan, P. L. So, and Y. C. Chu, "An output regulation-based unified power quality conditioner with Kalman filters," IEEE Trans. Ind. Electron., Vol. 59, No. 11, pp. 4248-4262, Nov. 2012.   DOI
6 IEEE Standard for Interconnecting Distributed Resources with Electric Power Systems, IEEE Standard 1547-2003.
7 D. G. Infield, P. Onions, A. D. Simmons, and G. A. Smith, "Power quality from multiple grid-connected single-phase inverters," IEEE Trans. Power Del., Vol. 19, No. 4, pp. 1983-1989, Oct. 2004.   DOI   ScienceOn
8 L. Gertmar, P. Karlsson, and O. Samuelsson, "On DC injection to AC grids from distributed generation," in Proc. Eur. Conf. Power Electron. Appl., p. 10, 2005.
9 M. P. Kazmierkowski and L. Malesani, "Current control techniques for three-phase voltage-source PWM converters: a survey," IEEE Trans. Ind. Electron., Vol. 45, No. 5, pp. 691-703, Oct. 1998.
10 D. N. Zmood, D. G. Holmes, and G. H. Bode, "Frequency-domain analysis of three-phase linear current regulators," IEEE Trans. Ind. Appl., Vol. 37, No. 2, pp. 601-610, Mar./Apr. 2001.   DOI   ScienceOn
11 J. M. Carrasco, L. G. Franquelo, J. T. Bialasiewicz, E. Galvan, R. C. P. Guisado, Mz. A. M. Prats, J. I. Leon, and N. Moreno-Alfonso, "Power-Electronic systems for the grid integration of renewable energy sources: A survey," IEEE Trans. Ind. Electron., Vol. 53, No. 4, pp. 1002-1016, Aug. 2006.   DOI   ScienceOn
12 B. D. Min, J. P. Lee, J. H. Kim, T. J. Kim, D. W. Yoo, K. R. Ryu, J. J. Kim, and E. H. Song, "A novel grid-connected PV PCS with new high efficiency converter," Journal of Power Electronics, Vol. 8, No. 4, pp. 309-316, Oct. 2008.
13 R. Y. Kim, S. Y. Choi, and I. Y. Suh, "Instantaneous control of average power for grid tie inverter using single phase D-Q rotating frame with all pass filter," in Proc. IEEE 30th Annu. IEEE IECON, Vol. 1, pp. 274-279, 2004.
14 D. N. Zmood and D. G. Holmes, "Stationary frame current regulation of PWM inverters with zero steady-state error," IEEE Trans. Power Electron., Vol. 18, No. 3, pp. 814-822, May 2003.   DOI   ScienceOn
15 L. Bowtell and A. Ahfock, "Direct current offset controller for transformerless single-phase photovoltaic grid-connected inverters," IET Renew. Power Gen., Vol. 4, No. 5, pp. 428-437, Sep. 2010.   DOI
16 R. Teodorescu, F. Blaabjerg, M. Liserre, and P. C. Loh, "Proportional-resonant controllers and filters for grid-connected voltage-source converters," IEE Proc.-Electr. Power Appl., Vol. 153, No. 5, pp. 750-762, Sep. 2006.   DOI   ScienceOn
17 S. Jiang, D. Cao, Y. Li, and F. Z. Peng, "Grid-connected boost-half-bridge photovoltaic microinverter system using repetitive current control and maximum power point tracking," IEEE Trans. Power Electron., Vol. 27, No. 11, pp. 4711-4722, Nov. 2012.   DOI
18 L. Hang, S. Liu, G. Yan, B. Qu, and Z. Lu, "An improved deadbeat scheme with fuzzy controller for the grid-side three-phase PWM boost rectifier," IEEE Trans. Power Electron., Vol. 26, No. 4, pp. 1184-1191, Apr. 2011.   DOI
19 J. A. Suul, K. Ljokelsoy, T. Midtsund, and T. Undeland, "Synchronous reference frame hysteresis current control for grid converter applications," IEEE Trans. Ind. Appl., Vol. 47, No. 5, pp. 2183-2194, Sep./Oct. 2011.   DOI
20 A. K. S. Bhat and S. B. Dewan, "A novel utility interfaced high-frequency link photovoltaic power conditioning system," IEEE Trans. Ind. Electron., Vol. 35, No. 1, pp. 153-159, Feb. 1988.   DOI
21 W. M. Blewitt, D. J. Atkinson, J. Kelly, and R. A. Lakin, "Approach to low-cost prevention of DC injection in transformerless grid connected inverters," IET Power Electron., Vol. 3, No. 1, pp. 111-119, Jan. 2010.   DOI
22 G. Buticchi, E. Lorenzani, and G. Franceschini, "A DC offset current compensation strategy in transformerless grid-connected power converters," IEEE Trans. Power Del., Vol. 26, No. 4, pp. 2743-2751, Oct. 2011.