Improvements on E-PLL to Mitigate Transient Low-Frequency Oscillations
Keywords:
Enhanced Phase-Locked Loop, Orthogonal signal generators, Low-Frequency Oscillations, Power QualityAbstract
This paper aims at improving the Enhanced-PLL (E-PLL) to mitigate the transient low-frequency oscillations, which is inherent to single-phase circuits. These improvements resulted in a new PLL configuration, designated here as the Double-Frequency Mitigation SOGI-EPLL, or simply DFM-SOGiEPLL. We integrate the EPLL with a Second-Order Generalized Integrator (SOGI), by modifying the computation of the internal error signals of the phase-and-frequency loop and the amplitude loop. Thus, the proposed DFM-SOGiEPLL is able to extinguish transient low-frequency oscillations, in a short time period, in comparison to the conventional EPLL. A dynamic model approach of both EPLLs, including four different test-cases, was implemented through numerical simulations and hardware experiments to verify the better performance of the proposed one.
Downloads
References
R. Vieira, M. I. Guerra, and S. Bandeira, “Analysis of the power quality of a grid-connected photovoltaic system,” IEEE LA Trans., vol. 18,
no. 04, pp. 714–721, 2020.
E. Gómez-Luna Eduardo, R. Franco-Manrique Rafael, and L. B. MoyaSuarez Luis Bernardo, “Use of the frequency response technique to analyze the impact of improving the power factor in the electrical networks,” IEEE LA Trans., vol. 17, no. 06, pp. 914–920, 2019.
J. Crepaldi, M. M. Amoroso, and O. H. Ando, “Analysis of the topologies of power filters applied in distributed generation units - review,” IEEE LA Trans., vol. 16, no. 7, pp. 1892–1897, 2018.
M. C. C. Leite, F. A. M. Vieira, V. B. Silva, M. Z. Fortes, and D. H. N. Dias, “Harmonic analysis of a photovoltaic systems connected to low
voltage grid,” IEEE LA Trans., vol. 16, no. 1, pp. 112–117, 2018.
M. J. d. Silva, S. C. Ferreira, J. P. d. Silva, M. G. d. Santos, A. L. Paganotti, and L. M. Barbosa, “Equivalency between adaptive notch
filter pll and inverse park pll by modeling and parameter adjustment,” IEEE LA Trans., vol. 18, no. 12, pp. 2112–2121, 2020.
K. Saleem, Z. Ali, and K. Mehran, “A single-phase synchronization technique for grid-connected energy storage system under faulty grid conditions,” IEEE Trans. on Power Electronics, pp. 1–1, 2021.
J. Xu, H. Qian, S. Bian, Y. Hu, and S. Xie, “Comparative study of single-phase phase-locked loops for grid-connected inverters under non-ideal grid conditions,” CSEE Journal of Power and Energy Systems, pp. 1–10, 2020.
S. Sakamoto, T. Izumi, T. Yokoyama, and T. Haneyoshi, “A new method for digital PLL control using estimated quadrature two-phase frequency detection,” in Proceedings - IEEE Power Conversion Conf. 2002 (Cat. No. 02TH8579), vol. 2, pp. 671–676, 2002.
S. A. O. Da Silva, R. Novochadlo, and R. A. Modesto, “Single-phase PLL structure using modified pq theory for utility connected systems,” in 2008 IEEE Power Electronics Specialists Conf., pp. 4706–4711, 2008.
H. Sepahvand, M. Saniei, S. S. Mortazavi, and S. Golestan, “Performance improvement of single-phase PLLs under adverse grid conditions: An fir filtering-based approach,” Electric Power Systems Research, vol. 190, p. 106829, 2021.
S. M. Silva, B. M. Lopes, R. P. Campana, W. Bosventura, et al., “Performance evaluation of PLL algorithms for single-phase grid-connected systems,” in 39th IAS Annual Meeting., vol. 4, pp. 2259–2263, 2004.
T. Xia, X. Zhang, G. Tan, and Y. Liu, “All-pass-filter-based pll for single-phase grid-connected converters under distorted grid conditions,” IEEE Access, vol. 8, pp. 106226–106233, 2020.
S. Føyen, C. Zhang, M. Molinas, O. Fosso, and T. Isobe, “Single phase synchronisation with hilbert transformers: a linear and frequency independent orthogonal system generator,” in 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, pp. 1–6, 2020.
S. Golestan, J. M. Guerrero, J. C. Vasquez, A. M. Abusorrah, and Y. AlTurki, “All-pass-filter-based pll systems: Linear modeling, analysis, and comparative evaluation,” IEEE Trans. on Power Electronics, vol. 35, no. 4, pp. 3558–3572, 2020.
J. Yu, W. Shi, J. Li, L. Deng, and M. Pei, “A discrete-time non-adaptive sogi-based frequency-locked loop,” IEEE Trans. on Power Systems, vol. 35, no. 6, pp. 4912–4915, 2020.
S. Golestan, J. M. Guerrero, and J. C. Vasquez, “Single-phase PLLs: A review of recent advances,” IEEE Trans. on Power Electronics, vol. 32, no. 12, pp. 9013–9030, 2017.
B. Liu, M. An, H. Wang, Y. Chen, Z. Zhang, C. Xu, S. Song, and Z. Lv, “A simple approach to reject dc offset for single-phase synchronous reference frame PLL in grid-tied converters,” IEEE Access, vol. 8, pp. 112297–112308, 2020.
S. Golestan, J. M. Guerrero, J. C. Vasquez, A. M. Abusorrah, and Y. AlTurki, “Linear time-periodic modeling, examination, and performance enhancement of grid synchronization systems with dc component rejection/estimation capability,” IEEE Trans. on Power Electronics, vol. 36, no. 4, pp. 4237–4253, 2021.
J. Xu, H. Qian, Y. Hu, S. Bian, and S. Xie, “Overview of sogi-based single-phase phase-locked loops for grid synchronization under complex grid conditions,” IEEE Access, vol. 9, pp. 39275–39291, 2021.
V. Kratyuk, P. K. Hanumolu, U. Moon, and K. Mayaram, “A design procedure for all-digital phase-locked loops based on a charge-pump phase-locked-loop analogy,” IEEE Trans. on Circ. and Systems II: Express Briefs, vol. 54, no. 3, pp. 247–251, 2007.
