Grid-Tied Neutral Point Clamped based Centralised Photovoltaic Inverter with Improved DC Link Voltage Balancing and Harmonic Minimisation Control

Bhowmick, Supratik; Mukherjee, Debranjan; Maiti, Suman; Chakraborty, Chandan

doi:10.2478/pead-2021-0011

Abstract

This paper proposes an improved space vector pulse width modulation (SVPWM) based DC link voltage balancing control of a three-phase three-level neutral point clamped (NPC) centralised inverter supplying the generated power from photo voltaic (PV) array to a three-phase utility grid. Two possible schemes have been developed based on the power conversion stage between PV array and the utility grid namely, two-stage (three-level boost converter three-phase three-level NPC inverter) and single-stage (three-phase three-level NPC inverter alone). The comparison between these two schemes has been thoroughly discussed in terms of the control strategies employed, power loss analysis and efficiency. The performance of the centralised inverter under different modes of operation has been investigated by developing the required control strategies for smooth operation. Using the proposed control strategy, the centralised inverter can be operated as a static synchronous compensator (STATCOM) during night time, if needed. The power loss incurred in the power-electronic converters has been analysed for constant and also for variable ambient temperature. The effectiveness of the centralised inverter as an active filter (AF) has also been verified when a three-phase non-linear load is considered in the system.

References

Akagi, H., Kanazawa, Y. and Nabae, A. (1984). Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components. IEEE Transactions on Industry Applications, IA-20(3), pp. 625–630.10.1109/TIA.1984.4504460
Search in Google Scholar Back to article
Aredes, M. and Watanabe, E. H. (1995). New Control Algorithms for Series and Shunt Three-Phase Four-Wire Active Power Filters. IEEE Transactions on Power Delivery, 10(3), pp. 1649–1656.10.1109/61.400952
Search in Google Scholar Back to article
Ben-Brahim, L. (2008). A Discontinuous PWM Method for Balancing the Neutral Point Voltage in Three-Level Inverter-fed Variable Frequency Drives. IEEE Transactions on Energy Conversion, 23(4), pp. 1057–1063.10.1109/TEC.2008.2001435
Search in Google Scholar Back to article
Bharatiraja, C., Jeevananthan, S. and Latha, R. (2014). FPGA Based Practical Implementation of NPC-MLI with SVPWM for an Autonomous Operation PV System with Capacitor Balancing. Electrical Power and Energy Systems, 61, pp. 489–509.10.1016/j.ijepes.2014.03.066
Search in Google Scholar Back to article
Bruckner, T. and Bernet, S. (2007). Estimation and Measurement of Junction Temperatures in a Three-Level Voltage Source Converter. IEEE Transactions on Power Electronics, 22(1), pp. 3–12.10.1109/TPEL.2006.886651
Search in Google Scholar Back to article
Cavalcanti, M. C., Farias, A. M., Oliveira, K. C., Neves, F. A. S. and Afonso, J. L. (2012). Eliminating Leakage Currents in Neutral Point Clamped Inverters for Photovoltaic Systems. IEEE Transactions on Industrial Electronics, 59(1), pp. 435–443.10.1109/TIE.2011.2138671
Search in Google Scholar Back to article
Cavalcanti, M. C., Oliveira, K. C., Farias, A. M., Neves, F. A. S., Azevedo, G. M. S. and Camboim, F. C. (2010). Modulation Techniques to Eliminate Leakage Currents in Transformerless Three-Phase Photovoltaic Systems. IEEE Transactions on Industrial Electronics, 57(4), pp. 1360–1368.10.1109/TIE.2009.2029511
Search in Google Scholar Back to article
Chen, H. C. and Lin, W. J. (2014). MPPT and Voltage Balancing Control with Sensing only Inductor Current for Photovoltaic-fed, Three-Level, Boost-type Converters. IEEE Transactions on Power Electronics, 29(1), pp. 29–35.10.1109/TPEL.2013.2262056
Search in Google Scholar Back to article
Chen, K., Jiang, W. and Wang, P. (2019). An Extended DPWM Strategy with Unconditional Balanced Neutral Point Voltage for Neutral Point Clamped Three-Level Converter. IEEE Transactions on Industrial Electronics, 66(11), pp. 8402–8413.10.1109/TIE.2018.2885735
Search in Google Scholar Back to article
IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems. (2014). IEEE Std 519-2014 (Revision of IEEE Std 519-1992). IEEE Power and Energy Society.
Search in Google Scholar Back to article
Janardhan, K., Mittal, A. and Ojha, A. (2020). Performance Investigation of Stand-alone Solar Photovoltaic System with Single Phase Micro Multilevel Inverter. Energy Reports, 6, pp. 2044–2055.10.1016/j.egyr.2020.07.006
Search in Google Scholar Back to article
Jiang, W., Li, L., Wang, J., Ma, M., Zhai, F. and Li, J. (2019). A Novel Discontinuous PWM Strategy to Control Neutral Point Voltage for Neutral Point Clamped Three-Level Inverter with Improved PWM Sequence. IEEE Transactions on Power Electronics, 34(9), pp. 9329–9341.10.1109/TPEL.2018.2886960
Search in Google Scholar Back to article
Kerekes, T., Teodorescu, R., Liserre, M., Klumpner, C. and Sumner, M. (2009). Evaluation of Three-Phase Transformerless Photovoltaic Inverter Topologies. IEEE Transactions on Power Electronics, 24(9), pp. 2202–2211.10.1109/TPEL.2009.2020800
Search in Google Scholar Back to article
Kwon, J. M., Kwon, B. H. and Nam, K. H. (2008). Three-Phase Photovoltaic System with Three-Level Boosting MPPT Control. IEEE Transactions on Power Electronics, 23(5), pp. 2319–2327.10.1109/TPEL.2008.2001906
Search in Google Scholar Back to article
Lee, J. S., Yoo, S. and Lee, K. B. (2016). Novel Discontinuous PWM Method of a Three-Level Inverter for Neutral-Point Voltage Ripple Reduction. IEEE Transactions on Industrial Electronics, 63(6), pp. 3344–3354.10.1109/TIE.2016.2530038
Search in Google Scholar Back to article
Mishra, M. K., Joshi, A. and Ghosh, A. (2003). Control Schemes for Equalization of Capacitor Voltages in Neutral Clamped Shunt Compensator. IEEE Transactions on Power Delivery, 18(2), pp. 538–544.10.1109/TPWRD.2003.809684
Search in Google Scholar Back to article
Mouton, H. T. (2002). Natural Balancing of Three-Level Neutral-Point-Clamped PWM Inverters. IEEE Transactions on Industrial Electronics, 49(5), pp. 1017–1025.10.1109/TIE.2002.803205
Search in Google Scholar Back to article
Nabae, A., Takahashi, I. and Akagi, H. (1981). A New Neutral-Point-Clamped PWM Inverter. IEEE Transactions on Industry Applications, IA-17(5), pp. 518–523.10.1109/TIA.1981.4503992
Search in Google Scholar Back to article
Raseena, P. and George, R. (2020). Transformerless Photovoltaic Inverter for Standalone Scheme with Extended Input Voltage. Materials Today: Proceedings, 24, pp. 1965–1971.10.1016/j.matpr.2020.03.624
Search in Google Scholar Back to article
Rodriguez, J., Bernet, S., Steimer, P. K. and Lizama, I. E. (2010). A Survey on Neutral-Point-Clamped Inverters. IEEE Transactions on Industrial Electronics, 57(7), pp. 2219–2230.10.1109/TIE.2009.2032430
Search in Google Scholar Back to article
Schweizer, M., Friedli, T. and Kolar, J. W. (2013). Comparative Evaluation of Advanced Three-Phase Three-Level Inverter/Converter Topologies against Two-Level Systems. IEEE Transactions on Industrial Electronics, 60(12), pp. 5515–5527.10.1109/TIE.2012.2233698
Search in Google Scholar Back to article
SEMITRANS 2, Fast IGB4 Modules, SKM50GAL12T4 Datasheet. Semikron Group, 2013.
Search in Google Scholar Back to article
Singh, B., Al-Haddad, K. and Chandra, A. (1999). A Review of Active Filters for Power Quality Improvement. IEEE Transactions on Industrial Electronics, 46(5), pp. 960–971.10.1109/41.793345
Search in Google Scholar Back to article
Taheri, A. and Zhalebaghi, M. H. (2017). A New Model Predictive Control Algorithm by Reducing the Computing Time of Cost Function Minimization for NPC Inverter in Three-phase Power Grids. ISA Transactions, 71(2), 391–402.10.1016/j.isatra.2017.07.02728823416
Search in Google Scholar Back to article
Teichmann, R. and Bernet, S. (2005). A Comparison of Three-Level Converters Versus Two-Level Converters for Low-Voltage Drives, Traction, and Utility Applications. IEEE Transactions on Industry Applications, 41(3), pp. 855–865.10.1109/TIA.2005.847285
Search in Google Scholar Back to article
Watanabe, E. H., Stephan, R. M. and Aredes, M. (1993). New Concepts of Instantaneous Active and Reactive Powers in Electrical Systems with Generic Loads. IEEE Transactions on Power Delivery, 8(2), pp. 697–703.10.1109/61.216877
Search in Google Scholar Back to article
Xia, C., Gu, X., Shi, T. and Yan, Y. (2011). Neutral-Point Potential Balancing of Three-Level Inverters in Direct-Driven Wind Energy Conversion System. IEEE Transactions on Energy Conversion, 26(1), pp. 18–29.10.1109/TEC.2010.2060487
Search in Google Scholar Back to article
Xia, C., Zhang, G., Yan, Y., Gu, X., Shi, T. and He, X. (2017). Discontinuous Space Vector PWM Strategy of Neutral-Point-Clamped Three-Level Inverters for Output Current Ripple Reduction. IEEE Transactions on Power Electronics, 32(7), pp. 5109–5121.10.1109/TPEL.2016.2611687
Search in Google Scholar Back to article
Yaramasu, V., Rivera, M., Narimani, M., Wu, B. and Rodriguez, J. (2015). High Performance Operation for a Four-Leg NPC Inverter with Two-Sample-Ahead Predictive Control Strategy. Electric Power Systems Research, 123, pp. 31–39.10.1016/j.epsr.2015.01.017
Search in Google Scholar Back to article
Zhang, L., Sun, K., Xing, Y. and Zhao, J. (2016). A Family of Five-Level Dual-Buck Full-Bridge Inverters for Grid-Tied Applications. IEEE Transactions on Power Electronics, 31(10), pp. 7029–7042.
Search in Google Scholar Back to article

Grid-Tied Neutral Point Clamped based Centralised Photovoltaic Inverter with Improved DC Link Voltage Balancing and Harmonic Minimisation Control

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