Techno-economic evaluation of five-level nested neutral point clamped converter topology for transformer-less connection of high-power wind energy conversion systems

Keywords: diode-clamped converter topology, wind turbine transformer, reliability analysis

Abstract

Developers and operators are interested in improving the reliability and reducing the associated costs of wind power plants (WPPs) because of the continuous increase in the power capacity of wind energy conversion systems (WECSs) and the increasing development of WPPs. The electrical subsystem of the WPP experiences the highest failure rate and constitutes a significant proportion of its total cost. Reliability of the WECS can be increased and its cost reduced by eliminating the wind turbine transformer from the electrical subsystem. This study gives a techno-economic evaluation of a five-level nested neutral point clamped (NNPC) converter topology for transformer-less connection of high- power WECSs. The approach entailed the calculation of reliability of five-level NNPC converter topology deployed in the grid-side of a WECSs. This method presents a mathematical formula for deriving the reliability of a five-level NNPC converter topology by using the reliability block diagram and reliability estimation-based models in the military handbook (MIL-HDBK-217F). The cost analysis model shows that the total cost of the five-level diode clamped converter topology was higher than the five-level NNPC converter topology. The study could be extended by carrying out accurate modelling of the mission profile of the presented converter by using multi-domain simulation technique.

References

[1] Yang, S., Bryant, A., Mawby, P., Xiang, D., Ran, L. and Tavner, P. 2011. An industry-based survey of reliability in power electronic converters. IEEE Transaction on Industry Applications 47(3): 1441-1452.
[2] Fischer, K., Stalin, T., Ramberg, H., Wenske, J., Wetter, G., Karlsson, R. and Thiringer, T. 2015. Field-experience based root-cause analysis of power converter failure in wind turbines. IEEE Transaction on Power Electronics 30(5): 2481-2493.
[3] Wilkinson, M. and Hendriks, B. Report on wind turbine reliability profiles – field data reliability analysis. RE-LIAWIND Project Report. https://www. Re-liawind.eu/files/fileinline/110502_Reliawind_Deliverable_D.1.3ReliabilityProfilesResults.pdf.
[4] Reder, M.D., Gonzalez, E. and Melero, J.J. 2016. Wind turbine failures - tackling current problems in failure data analysis. Journal of Physics: Conference Series 753: 072027.
[5] Jose, G. and Chacko, R. 2014. A review on wind turbine transformer. Annual International Conference on Emerging Areas: Magnetics, Machines and Drive, Kottayam, India, 24-26 July 2014: 1- 7.
[6] Remington, K. and Steeber, T. 2010. Why do transformers fail often? [Online]. Available: http://www.windpowerengineering.com/featured/business-news-projects/why-do-wind-turbine-transformers-fail-so-often/.
[7] Ribrant, J. and Bertling, L.M. 2007. Survey of failures in wind power systems with focus on swedish wind pow-er plants during 1997-2005. IEEE Transaction on Energy Conversion. 22(1):167-173.
[8] Perez, J.M., Marquez, F., Tobias, A. and Papaelias, M. 2013. Wind turbine reliability analysis. Renewable and Sustainable Energy Reviews 23: 463-472.
[9] Spinato, F., Tavner, P.J., Van Bussel, G.J.W. and Koutoulakos, E. 2008. Reliability of wind turbine subassem-blies. IET Renewable Power Generation 3(4): 387-401.
[10] Blaabjerg, F., Liserre, M., and Ma, K. 2012. Power electronics converter for wind energy systems. IEEE Transac-tion on Industry Application 48(2):708-720.
[11] Yaramasu, V., Wu, B., Sen, P.C., Kouro, S. and Narimani, M. 2015. High-Power Wind Energy Conversion Sys-tems: State-of-the Art and Emerging Technologies, Proceedings of the IEEE 103(5): 740-780.
[12] Narimani, M., Wu, B., Cheng, G. and Zargari, N. 2014. A new nested neutral point clamped converter for medi-um-voltage power conversion, IEEE Transaction on Power Electronics 29(12): 6375-5382.
[13] Narimani, M., Wu, B. and Zargari, N. 2016. A novel five-level voltage source inverter with sinusoidal pulse width modulator for medium-voltage applications. IEEE Transaction on Power Electronics 31(3): 1956-1967.
[14] Ajayi-Obe, A.A. and Khan, M.A. 2017. Analysis of a five-level dual tapped inductor quasi impedance source-nested neutral point clamped converter. Proceeding of the IEEE-Energy Conversion Congress Exposition 2017, Cincinnati, OH, USA, 1-5 October, 2017: 2150-2155.
[15] Military handbook: Reliability prediction of electronic equipment, Dept. Defence, Washington, DC, USA, Dec. 2, 1991, MIL-HDBK-217F.
[16] Ma, K., Liserre, M., Blaabjerg, F. and Kerekes, T. 2015. Thermal loading and lifetime estimation for power de-vice considering mission profiles in wind power converter. IEEE Transaction on Power Electronics 30(2): 590-602.
[17] Yu, X. and Khambadkone, A.M. 2012. Reliability analysis and cost optimization of parallel-inverter system. IEEE Transaction on Industrial Electronics 59(10): 3881-3890.
[18] Wang, H., Zhou, D. and Blaabjerg, F. 2013. A reliability-oriented design method for power electronic convert-ers. 28th Annual Applied Power Electronics Conference and Exposition 2013, Long Beach, CA, USA, 17-23 March, 2013: 2921-2928.
[19] Wang, H. and Blaabjerg, F. 2014. Reliability of capacitors for dc-link applications in power electronic converters – an overview. IEEE Transaction on Industry Application 50(5): 3569-3579.
[20] Jedtberg, H., Langwasser, M., Zhu, R., Buticchi, G., Ebel, T. and Liserre, M. 2017. Impacts of unbalanced grid voltages on lifetime of dc-link capacitors of back-to-back converters in wind turbines with doubly fed induction generators. IEEE Applied Power Electronics Conference and Exposition, Tampa, FL, USA, 26-30 March, 2017: 816-823.
[21] Alwitt, R.S. and Hills, R.G. 1965. The chemistry of failure of aluminium electrolytic capacitors. IEEE Transaction on Parts, Materials and Packaging 1(2): 28-24.
[22] Yang, S., Xiang, D., Bryant, A., Mawby, P., Ran, L. and Tavner, P. 2010. Condition monitoring for device relia-bility in power electronic converters: a review. IEEE Transaction on Power Electronics 25(11): 2734-2753.
[23] Guo, J., Liang, J., Zhang, X., Judge, P., Wang, X. and Green, T. 2017. Reliability analysis of MMCs considering submodule designs with individual or series operated IGBTs. IEEE Transaction on Power Delivery 32(2): 666-677.
[24] Richardeau, F. and Pham, T.T.L. 2013. Reliability calculation of multilevel converters: theory and applications. IEEE Transaction on Industrial Electronics 60(10): 4225-4234.
[25] Mohan, N., Undeland, T.M. and Robbins, W.P. 2003. Power electronics: Converters, applications, and design, third edition, USA: Wiley.
[26] Sutrisno, E. 2013. Fault detection and prognostics of insulated gate bipolar transistor (IGBT) using a k-nearest neighbour classification algorithm. Master of Science thesis, University of Maryland, USA.
[27] Aghdam, F.H. and Abapour, M. 2016. Reliability and cost analysis of multistage boost converters connected to PV panels. IEEE Journal of Photovoltaics 6(4): 981-989.
[28] Sayago, J.A., Bruckner, T. and Bernet, S. 2008. How to select the system voltage of MV drives-a comparison of semiconductor expenses. IEEE Transaction on Industrial Electronics 55(9): 3381-3389.
[29] Fazel, S.S., Bernet, S., Krug, D. and Jalili, K. 2007. Design and comparison of 4-kV neutral-point-clamped, fly-ing-capacitor, and series-connected h-bridge multilevel converters. IEEE Transaction on Industry Applications 43(4): 1032-1040.
[30] Burkart, R. and Kolar, J.W. 2013. Component cost models for multi-objective optimizations of switched-mode power converters. IEEE Energy Conversion Congress and Exposition 2013, Denver, CO, USA, 15-19 Sep-tember 2013: 2139-2146.
[31] Canada, S., Moore, L., Strachan, J. and Post, H. 2003. Off-grid hybrid systems: maintenance costs. Solar Energy Technology System Symposium.
[32] Begovic, M., Pregelj, A. and Rohatgj, A. 2000. Four-year performance assessment of the 342 kW PV system at Georgia Tech. Conference Record of the 28th IEEE Photovoltaic Specialists Conference 2000, 15-22 Septem-ber 2000, Anchorage, USA: 1575-1578.
[33] Akagi, H., Fujita, H., Yonetani, S. and Kondo, Y. 2008. A 6.6 kV transformer-less STATCOM based on a five-level diode-clamped PWM converter: system design and experimentation of a 200-V 10-kVA laboratory model. IEEE Transaction on Industry Applications 44(2): 672-680.
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Published
2019-09-18