Abstract
Voltage and frequency fluctuation under variable load or variable wind speed is the key issue to solve in distributed generation based on wind power. Further, harmonic and zero sequence current flow through the generator windings due to connection of nonlinear load deteriorate the power quality of the supply. In this paper a control algorithm known as adaptive vectorial filter (AVF) is developed for the solution of the aforesaid problems. This method lies in the category of frequency lock loop (FLL) rather than phase locked loop (PLL) and having no PI coefficient in the loop filter. Therefore it is easy to tune for that frequency component which is desired at output. The frequency locked loop extracts the frequency of the source voltage which is less affected by sudden changes in the system. Hence it is more suitable than the PLL based techniques in wind based distributed power generation system. The entire system is tested under different operating conditions using field-programmable gate array based controller with MATLAB interface in real time. The dynamic response and steady state response shown by it is found satisfactory.
Appendix
A1.BESS Parameters: Lithium-ion type, 400 V, 7.5 AH, SOC (10 % to 90 %), internal resistance(rs) = 0.05 Ω
A2.Non linear load in Phase ‘a’, Phase ‘b’ and phase ‘c’: Diode bridge with R = 30 Ω, L = 100 mH in each phase,
A3.Implementation Parameters: Ls = 4 mH;
PI Controller: In frequency control loop, kp = 0.052, ki = 0.012, In terminal voltage control loop kp = 0.42, ki = 0.22
Gain parameters of PLL: kp = 320, ki = 76
Wind Turbine Parameters [3]: 5 kW, Radius of blades r = 1.4 m, cp(λ,β) = 0.87, Vw = 12.5 m/s and ρ = 0.48.
References
[1] Chapallaz J, Dos Ghali J, Eichenberger P, Fischer G. Manual on induction motors used as generators. Wiesbaden: Springer Vieweg, 199210.1007/978-3-663-14044-3Search in Google Scholar
[2] Ghosh A, Ledwich G. Power quality enhancement using custom power devices. London, U.K: Kluwer, 2002.10.1007/978-1-4615-1153-3Search in Google Scholar
[3] Barghi Latran M, Teke A, Yoldas Y. Mitigation of power quality problems using distribution static synchronous compensator: A comprehensive review. IET Power Electron. 2015;8:1312–28.10.1049/iet-pel.2014.0531Search in Google Scholar
[4] Akagi H, Watanabe EH, Aredes M. Instantaneous power theory and applications to power conditioning. Hoboken, NJ: Wiley, 2007.10.1002/0470118938Search in Google Scholar
[5] Moreno-Munoz A. Power quality: mitigation technologies in a distributed environment. London, U.K: Springer-Verlag, 2007.10.1007/978-1-84628-772-5Search in Google Scholar
[6] Sebastian R. Application of a battery energy storage for frequency regulation and peak shaving in a wind diesel power system. IET Gener Transm Distrib. 2016;10:764–70.10.1049/iet-gtd.2015.0435Search in Google Scholar
[7] Beverly LH, Hance RD, Kristalinski AL, Visser AT. Method and apparatus for reducing the harmonic currents in alternating current distribution networks. U.S. Patent 5 576 942, Nov. 19, 1996.Search in Google Scholar
[8] Jou H-L, Wu J-C, Wu K-D, Chiang WJ, Chen YH. Analysis of zig-zag transformer applying in the three-phase four-wire distribution power system. IEEE Trans Power Delivery. 2005 Apr;20:1168–73.10.1109/TPWRD.2005.844281Search in Google Scholar
[9] Singh B, Sharma S. Design and implementation of four-leg voltage source converter based VFC for autonomous wind energy conversion system. IEEE Trans Ind Electron. 2012 Dec;59:4694–703.10.1109/TIE.2011.2179271Search in Google Scholar
[10] Golestan S, Guerrero JM, Vasquez JC. Three-phase PLLs: A review of recent advances. IEEE Trans Power Electron. 2017 March;32:1894–907.10.1109/TPEL.2016.2565642Search in Google Scholar
[11] Perales M, Mora J, Carrasco J, Franquelo L. A novel control method for active filters, based on filtered current. In Proceedings. IEEE 32nd Annual. PESC, Jun. 2001. 1408–13.10.1109/PESC.2001.954317Search in Google Scholar
[12] Rodriguez P, Luna A, Candela I, Mujal R, Teodorescu R, Blaabjerg F. Multi-resonant frequency-locked loop for grid synchronization of power converters under distorted grid conditions. IEEE Trans Ind Electron. 2011 Jan;58:127–38.10.1109/TIE.2010.2042420Search in Google Scholar
[13] Mojiri M, Karimi Ghartemani M, Bakhshai A. Time-domain signal analysis using adaptive notch filter. IEEE Trans Signal Process. 2007 Jan;55:85–93.10.1109/TSP.2006.885686Search in Google Scholar
[14] Yazdani D, Bakhshai A, Joos G, Mojiri M. A real-time extraction of harmonic and reactive current in a nonlinear load for grid-connected converters. IEEE Trans Ind Electron. 2009 Jun;56:2185–89.10.1109/TIE.2009.2017100Search in Google Scholar
[15] Yazdani D, Mojiri M, Bakhshai A, Joos G. A fast and accurate synchronization technique for extraction of symmetrical components. IEEE Trans Power Electron. 2009 Mar;24:674–84.10.1109/TPEL.2008.2010321Search in Google Scholar
[16] Wang F, Benhabib M, Duarte J, Hendrix M.High performance stationary frame filters for symmetrical sequences or harmonics separation under a variety of grid conditions. in Proceedings. 24th Annual. IEEE APEC, Feb. 2009. 1570–76.10.1109/APEC.2009.4802877Search in Google Scholar
[17] Guo XQ. Frequency-adaptive voltage sequence estimation for grid synchronisation. Electron Lett. 2010 Jul;46:980–82.10.1049/el.2010.0843Search in Google Scholar
[18] Guo X, Wu W, Chen Z. Multiple-complex coefficient-filter-based phase-locked loop and synchronization technique for three-phase grid interfaced converters in distributed utility networks. IEEE Trans Ind Electron. 2011 Apr;58:1194–204.10.1109/TIE.2010.2041738Search in Google Scholar
[19] Asiminoaei L, Blaabjerg F, Hansen S. Detection is key-Harmonic detection methods for active power filter applications. IEEE Ind Appl Mag. 2007 Jul./Aug;13:22–33.10.1109/MIA.2007.4283506Search in Google Scholar
[20] Vazquez S, Sanchez JA, Reyes MR, Leon JI, Carrasco JM. Adaptive vectorial filter for grid synchronization of power converters under unbalanced and/or distorted grid conditions. IEEE Trans Ind Electron. 2014;61:1355–67.10.1109/TIE.2013.2258302Search in Google Scholar
[21] Wu J-C, Jou HL, Feng Y-T, Hsu W-P, Huang M-S, Hou W-J. Novel circuit topology for three-phase active power filter. IEEE Trans Power Delivery. 2007;22:444–910.1109/TPWRD.2006.881416Search in Google Scholar
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