Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
권호 표지
DOI QR코드

DOI QR Code

Grid-Connected Three-Phase Inverter System with Sub Inverter using Combination Type UPFC Structure

  • Received : 2020.07.02
  • Accepted : 2020.07.22
  • Published : 2020.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

As the renewable energy market grows, grid-connected inverters have been improving and expanding in several fields in recent years because energy conversion devices are the main components of solar systems. In this paper, a high-precision new grid-connected three-phase inverter system is proposed. The proposed system consists of a main inverter, a sub inverter and a transformer. The main inverter operates at a low switching frequency and high power and transmits power to the grid. A sub-inverter connected in series with the transmission line through a matching transformer operates at lower power than the main inverter to provide input values to the transformer. The transformer acts as a power supply according to the voltage compensation value. This study is based on the principle of operation of the UPFC(Unified Power Flow Controller) structure used to regulate power flow in AC transmission lines. The grid-connected inverter system proposed in this paper is implemented with high precision and high resolution. The proposed system was verified through its ability to enhance and ensure the safety of the proposed system through simulation and experiment.

Keywords

References

  1. LE THI TUAN VI, "High Precision Gridconnected Inverter System Using UPFC Structure," Master Thesis, Chonnam National University, August 2019.
  2. D. Hadiouche, L. Baghli, and A. Rezzoug, "Space vector PWM techniques for dual threephase AC machine: Analysis, performance evaluation, and DSP implementation," IEEE Trans. Ind. Appl., vol. 42, no. 4, pp. 1112-1122, Jul./Aug. 2006. https://doi.org/10.1109/TIA.2006.877737
  3. J. Dannehl, F. W. Fuchs, and P. B. Thogersen, "PI State Space Current Control of Grid-Connected PWM Converters with LCL Filters," IEEE Trans. Power Electron, vol. 25, no. 9, pp. 2320-2330, Sept. 2010. https://doi.org/10.1109/TPEL.2010.2047408
  4. K. Gaurav and N. Saxena, "Power Quality improvement using UPFC," International Journal of Electrical, Electronics and Computer Engineering, Vol.2, No.2, pp. 30-33, 2013.
  5. E. Isen, and A. F. Bakan, "High efficient three-phase grid-connected parallel inverter system," Joural of Modern Power Systems and Clean Energy, vol. 6, pp. 1079-1089, September 2018. https://doi.org/10.1007/s40565-018-0391-7
  6. Fang Zhuo, Yue-Wang, Zhaoan-Wang, "The configuration of main circuit and control strategy for active power filter in three-phase fourwire system," IEEE 32 Annual Power Electronics Specialists Conference, PESC., vol. 3, pp. 1615-1618, June 2001.
  7. L. Chen, A. Amirahmadi, Q. Zhang; N. Kutkut, and I. Batarseh, "Design and Implementation of Three-Phase Two-Stage Grid-Connected Module Integrated Converter," Power Electronics, IEEE Transactions on, vol. 29, no. 8, pp.3881-3892, Aug. 2014. https://doi.org/10.1109/TPEL.2013.2294933
  8. B. Meersman, B. Renders, L. Degroote, and L. Vandevelde, "Overview of three-phase inverter topologies for distributed generation purposes", i-SUP2010, April 18-21, 2010.
  9. Y. Shuitao, L. Yang, W. Xiaorui, G. Deepak, K. Ujwjal, and Z. P. Fang, "Modulation and Control of Transformerless UPFC," IEEE Transaction on Power Electronics, Vol. 31, pp. 1050-1063, March 2015. https://doi.org/10.1109/TPEL.2015.2416331