Supraharmonics Emission Assessment of Multi-level Converters Applied for Photovoltaic Grid-Connected Inverters T. Busatto, A. Larsson, S. K. Rönnberg and M. H. J. Bollen   2017/04/25

Abstract

Topologies for different DC-AC converters used on grid-connected photovoltaic (PV) inverters are analysed and compared within this paper. The main focus is to evaluate the supraharmonic emission in the frequency range 2 to 150 kHz. For this study three topologies are evaluated: Neutral Point Clamped (NPC), the Cascaded H-bridge (CHB) and the Flying Capacitor (FC). To approximate the operation closer to a real scenario, the converters are analysed under the presence of voltage waveform distortion in the power supply. The simulation is performed using PSpice for the converters and Simulink for the grid. The characterization is made by the quantification of harmonics and supraharmonics, and also by the frequency domain analysis of the output current. Finally, a comparison of the chosen technologies is carried out, given a better understanding on the elements which exert influence on this type of emission.

Authors and affiliations

T. Busatto, A. Larsson, S. K. Rönnberg and M. H. J. Bollen
Electrical Power Engineering. Luleå University of Technology (LTU). Skellefteå, Sweden

Key word

Supraharmonics, power electronics, power quality, photovoltaic inverter, multi-level converters.

References

[1] Photovoltaic Power Systems Programme, Annual Report 2015, IEA International Energy Agency, IEA-PVPS, 2015.
[2] S. Ronnberg, gEmission and interaction from domestic installations in the low voltage electricity network, up to 150 kHz,h Ph.D. dissertation, Lulea University of Technology, 2013.
[3] F. Abid, T. Busatto, S. Ronnberg, M. H. J. Bollen gIntermodulation due to interaction of photovoltaic inverter and electric vehicle at supraharmonic rangeh, in Proc. Int. Conference on Harmonics and Quality of Power, ICHQP, Belo Horizonte, Brazil, 2016.
[4] T. Busatto, A. Larsson, M. H. J. Bollen, G. Singh gInteraction between Grid-Connected PV systems and LED Lamps: Directions for Further Research on Harmonics and Supraharmonicsh in Proc. Int. Conference on Harmonics and Quality of Power, ICHQP, Belo Horizonte, Brazil, 2016.
[5] S. Ronnberg, A. Larsson, M. Bollen, and J.-L. Schanen, gA simple model for interaction between equipment at a frequency of some tens of kHz,h in Proc. Int. Conf. Electricity Distribution (CIRED), Frankfurt, Germany June 2011.
[6] Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current .16 A per phase), IEC Standard 61000-3-2, May. 2014.
[7] M. Bollen, J. Meyer, H. Amaris, A. M. Blanco, J. D. Aurora Gil de Castro, M. Klatt, .ukasz Kocewiak, S. Ronnberg, and K. Yang, gFuture work on harmonics - some expert opinions
Part I - wind and solar power,h in Harmonics and Quality of Power (ICHQP), 2014 IEEE 16th International Conference on, Bucharest, May 2014.
[8] E. Larsson, M. Bollen, M. Wahlberg, C. Lundmark, and S. Ronnberg, gMeasurements of High-Frequency (2-150 kHz) Distortion in Low-Voltage Networks,h Power Delivery, IEEE Transactions on, vol. 25, no. 3, pp. 1749.1757, July 2010.
[9] A. McEachern, Electric Power Definitions: a Debate, IEEE Power and Energy Society General Meeting, Vancouver, Canada, 2013.
[10] M. Hankaniemi, T. Suntio, and M. Karppanen, gLoad and supply interactions in VMC-buck converter operating in CCM and DCM,h in Power Electronics Specialists Conference, 2006. PESC 06. 37th IEEE, June 2006.
[11] A. Yazdani, R. Iravani, Voltage-Sourced Converters in Power Systems: Modeling, Control, and Applications, 1st Edition, John Wiley & Sons, Inc., 2010
[12] Grahame D. Holmes and Thomas A. Lipo, 2003, "Pulse width modulation for power converters: principles and practice," IEEE Press, Series on Power Engineering
[13] A. M. Blanco, R. Stiegler, J. Meyer, gPower Quality Disturbances caused by Modern Lighting Equipment (CFL and LED)h, PowerTech (POWERTECH), 2013 IEEE Grenoble, Grenoble, 2013, pp. 1-6.
[14] Energy Generation Equipment Connected to the Low Voltage Grid, Guideline for the Connection and Parallel Operation of Energy Generation Equipment on Low Voltage Grid), Verband der Elektrizittswirtschaft VDEW e. V., 2001.
[15] Remus Teodorescu; Marco Liserre; Pedro Rodriguez, "Grid Filter Design," in Grid Converters for Photovoltaic and Wind Power Systems , 1, Wiley-IEEE Press, 2011, pp.289-312.
[16] IEEE Std 1547-2003, Standard for Interconnecting Distributed Resources with Electric Power Systems, in IEEE Std 1547-2003 , vol., no., pp.1-28, July 28 2003.
[17] Electromagnetic compatibility (EMC) . Part 4-13: Testing and measurement techniques . Harmonics and interharmonics including mains signalling at a.c. power port, low frequency immunity tests, IEC Standard 61000-4-13, Jul. 2009.
[18] J. H. R. Enslin et al., "Harmonic interaction between large numbers of photovoltaic inverters and the distribution network," 2003 IEEE Bologna Power Tech Conference Proceedings,, 2003, pp. 6 pp. Vol.3-.
[19] IEC Tech. Rep. 6072, gConsideration of reference impedances and public supply network impedances for use in determining the disturbance characteristics of electrical equipment having a rated current .75 A per phaseh, 2005.
[20] IEC 61000-4-7 Ed. 2.1 gElectromagnetic compatibility (EMC) . part 4.7. Testing and measurement techniques . General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected theretoh, IEC, 2008.
[21] A. Moreno Munoz, A. Gil de Castro, S. Ronnberg, M. Bollen, gSupraharmonics (2 to 150 kHz) and multilevel convertersh, 5th Int. Conf. on Power Engineering, Energy and Electrical Drives, POWERENG, 2015.