The Impact of Transformer Winding Connections of A Grid-Connected PV on Voltage Quality Improvement

Hanny Tumbelaka, Eduard Muljadi, Wenzhong Gao

Abstract


In this paper, the high-power PV plant is connected to the weak grid by means of a three-phase power transformer. The selection of transformer winding connection is critical especially when the PV inverter has a reactive power controller. In general, transformer winding connection can be arranged in star-star (with neutral earthed) or star-delta. The reactive power controller supports voltage regulation of the power system particularly under transient faults. Its control strategy is based on utilizing the grid currents to make a three-phase reactive unbalanced current with a small gain. The gain is determined by the system impedance. Simulation results exhibit that the control strategy works very well particularly under disturbance conditions when the transformer winding connection is star-star with both neutrals grounded. The power quality in terms of the voltage quality is improved.

Keywords


Solar Energy; Grid connected PV; Reactive power; Transformer winding; Voltage quality

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References


Arulkumar, K., Palanisamy, K., Vijayakumar, D., Recent Advances and Control Techniques in Grid Connected PV System – A Review, International Journal of Renewable Energy Research, Vol.6, No.3, 2016

Eltawil, M.A., Zhao, Z., Grid-Connected Photovoltaic Power Systems: Technical and Potential Problems—A Review. Renewable and Sustainable Energy Reviews 14 (2010), p. 112–129

Tumbelaka, H.H., L.J. Borle, and C.V. Nayar. Analysis of a Series Inductance Implementation on a Three-phase Shunt Active Power Filter for Various Types of Non-linear Loads. Australian Journal of Electrical and Electronics Engineering, Engineers Australia, Vol. 2, No. 3, 2005, p. 223-232.

M. Calais, V. G. Agelidis, L. J. Borle, M. S. Dymond, “A Transformerless Five Level Cascaded Inverter Based Single Phase Photovoltaic Systemâ€, IEEE proc. of 31st PESC, vol. 3, pp. 1173-1178, June 2000, Ireland.

Rodriguez, J., Jih-Sheng Lai, Fang Zheng Peng, Multilevel Inverters: A Survey of Topologies, Controls, and Applications, IEEE Transactions on Industrial Electronics, Vol. 49, No. 4, pp. 724- 738, Aug 2002

Alexey Kondrashov, Tobin Booth, Distribution and Substation Transformers, SolarPro Magazine, Issue 8.2, Mar/Apr '15

L. Zhou, and Y. Chao, The Research of Reactive Power Control Strategy For Grid-Connected Photovoltaics Plants, in 2013 World Congress on Sustainable Technologies, pp. 12 – 17.

H. Li, et. al., Real and Reactive Power Control of A Three-Phase Single-Stage PV System and PV Voltage Stability, in 2012 IEEE Power and Energy Society General Meeting, pp. 1 – 8.

X. Su, M. A. S. Masoum, and P. J. Wolfs, Optimal PV Inverter Reactive Power Control And Real Power Curtailment To Improve Performance Of Unbalanced Four-Wire LV Distribution Networks, IEEE Transactions on Sustainable Energy, vol. 5, no. 3, 2014, pp. 967 – 977.

P. Esslinger, and R. Witzmann, Evaluation of Reactive Power Control Concepts For PV Inverter In Low-Voltage Grids,†in 2012 CIRED Workshop, paper 363.

A. Camacho, et. al., Flexible Voltage Support Control For Three-Phase Distributed Generation Inverters Under Grid Fault, IEEE Transactions on Industrial Electronics, vol. 60, no. 4, 2013, pp. 1429 – 1441.

Faa-Jen Lin, et. al., Reactive Power Control of Three-Phase Grid-Connected PV System During Grid Faults Using Takagi-Sugeno-Kang Probabilistic Fuzzy Neural Network Control, IEEE Transactions on Industrial Electronics, vol. 62, no. 9, 2015, pp. 5516 – 55528.

N. P. W. Strachan, and D. Jovcic, Stability of A Variable-Speed Permanent Magnet Wind Generator With Weak Ac Grids, IEEE Transactions on Power Delivery, vol. 25, no. 4, 2010, pp. 2779 – 2788.




DOI (PDF): https://doi.org/10.20508/ijrer.v8i1.6488.g7280

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