- Volume 9 Issue 3
DOI QR Code
Power Smoothening Control of Wind Farms Based on Inertial Effect of Wind Turbine Systems
- Nguyen, Thanh Hai ;
- Lee, Dong-Choon ;
- Kang, Jong-Ho
- Received : 2013.11.26
- Accepted : 2014.03.07
- Published : 2014.05.01
This paper proposes a novel strategy for attenuating the output power fluctuation of the wind farm (WF) in a range of tens of seconds delivered to the grid, where the kinetic energy caused by the large inertia of the wind turbine systems is utilized. A control scheme of the two-level structure is applied to control the wind farm, which consists of a supervisory control of the wind farm and individual wind turbine controls. The supervisory control generates the output power reference of the wind farm, which is filtered out from the available power extracted from the wind by a low-pass filter (LPF). A lead-lag compensator is used for compensating for the phase delay of the output power reference compared with the available power. By this control strategy, when the reference power is lower than the maximum available power, some of individual wind turbines are operated in the storing mode of the kinetic energy by increasing the turbine speeds. Then, these individual wind turbines release the kinetic power by reducing the turbine speed, when the power command is higher than the available power. In addition, the pitch angle control systems of the wind turbines are also employed to limit the turbine speed not higher than the limitation value during the storing mode of kinetic energy. For coordinating the de-rated operation of the WT and the storing or releasing modes of the kinetic energy, the output power fluctuations are reduced by about 20%. The PSCAD/EMTDC simulations have been carried out for a 10-MW wind farm equipped with the permanent-magnet synchronous generator (PMSG) to verify the validity of the proposed method.
Inertia effect;Pitch angle control;PMSG;Power smoothening;Supervisory control;Wind farm
- L.-R. C.-Chien, W.-T. Lin, and Y.-C. Yin, "Enhancing frequency response control by DFIGs in the high wind penetrated power systems," IEEE Trans. Power Systems, vol. 26, no. 2, pp. 710-718, May 2011. https://doi.org/10.1109/TPWRS.2010.2052402
- Y. Park, D. Han, Y. Suh, and W. Choi, "Minimization of active power and torque ripple for a doubly fed induction generator in medium voltage wind power systems under unbalanced grid conditions," Journal of Power Electron., vol. 13, no. 6, pp. 1032-1041, Nov. 2013. https://doi.org/10.6113/JPE.2013.13.6.1032
- J. Lee, J. Kim, Y.-H. Kim, Y.-H. Chun, S.-H. Lee, J.- K. Seok, and Y.-C. Kang, "Rotor speed-based droop of a wind generator in a wind power plant for the virtual inertial control," J. Electr. Eng. Technol., vol. 8, no. 5, pp. 1021-1028, 2013. https://doi.org/10.5370/JEET.2013.8.5.1021
- P.-K. Keung, P. Li, H. Banakar, and B. T. Ooi, "Kinetic energy of wind-turbine generators for system frequency support," IEEE Trans. Power Systems, vol. 24, no. 1, pp. 279-287, Feb. 2009. https://doi.org/10.1109/TPWRS.2008.2004827
- J.-H. Im, S.-H. Song, and S. Kang, "Analysis and compensation of PCC voltage variations caused by wind turbine power fluctuations," Journal of Power Electron., vol. 13, no. 5, pp. 854-860, Sep. 2013. https://doi.org/10.6113/JPE.2013.13.5.854
- Z. Lubbosny and J. W. Bialek, "Supervisory control of a wind farm," IEEE Trans. Power Systems, vol. 22, no. 3, pp. 985-994, Aug. 2007. https://doi.org/10.1109/TPWRS.2007.901101
- L. Ran, J. R. Bumby, and P. J. Tavner, "Use of turbine inertia for power smoothening of wind turbines with a DFIG," in Proceedings of 11th International Conference on Harmonics and Quality of Power, 2014.
- A. U., A. Pratap, T. Goya, T. Senjyu, A. Yona, N. Urasaki, and T. Funabashi, "A coordinated control method to smooth wind power fluctuations of a PMSG-based WECS," IEEE Trans. Energy Conversion, vol. 27, no. 2, pp. 550-558, Jun. 2011.
- T. Senjyu, R. Sakamoto, N. Urasaki, T. Funabashi, H. Fujita, and H. Sekine, "Output power leveling of wind turbine generator for all operating regions by pitch angle control," IEEE Trans. Energy Conversion, vol. 21, no. 2, pp. 467-475, Jun. 2006. https://doi.org/10.1109/TEC.2006.874253
- S. H. Hyun and J. Wang, "Pitch angle control and wind speed prediction method using inverse inputoutput relation of a wind generation system," J. Electr. Eng. Technol., vol. 8, no. 5, pp. 1040-1048, 2013. https://doi.org/10.5370/JEET.2013.8.5.1040
- T. H. Nguyen and D.-C. Lee, "Advanced fault ridethrough technique for PMSG wind turbine systems using line-side converter as STATCOM," IEEE Trans. Ind. Electron., vol. 60, no. 7, pp. 2842-2850, Jul. 2013. https://doi.org/10.1109/TIE.2012.2229673
- S. Vazquez, S. M. Lukic, E. Galvan, L. G. Franquelo, and J. M. Carrasco, "Energy storage systems for transport and grid applications," IEEE Trans. Ind. Electron., vol. 57, no. 12, pp. 3881-3895, Dec. 2010. https://doi.org/10.1109/TIE.2010.2076414
- T. H. Nguyen, D.-C. Lee, and J.-H. Kang, "Output power smoothening of wind farms by utilizing inertial effect of wind turbine systems," in Proc. of ISGC&E, Korea, pp. 612-617, Jul. 2013.
- T. H. Nguyen and D.-C. Lee, "Ride-through technique for PMSG wind turbines using energy storage systems," Journal of Power Electron., vol. 10, no. 6, pp. 733-738, Nov. 2010. https://doi.org/10.6113/JPE.2010.10.6.733
- W. L. Chen, Z. C. Li, and C. Z. Xie, "Control of static synchronous compensator with supplementary damping enhancement for wind farm voltage regulation," IET Gener., Transm. & Distri., vol. 5, no. 12, pp. 1211-1220, 2011. https://doi.org/10.1049/iet-gtd.2011.0246
- H. T. Ma and B. H. Chowdhury, "Working towards frequency regulation with wind plants: combined control approaches," IET Renew. Power. Gener., Vol. 4, No. 4, pp. 308-316, 2010. https://doi.org/10.1049/iet-rpg.2009.0100
- Output power smoothing of grid-connected permanent-magnet synchronous generator driven directly by variable speed wind turbine: a review vol.2017, pp.13, 2017, https://doi.org/10.1049/joe.2017.0633
- Doubly fed induction generator wind turbines: A novel integrated protection circuit for low-voltage ride-through strategy vol.6, pp.5, 2014, https://doi.org/10.1063/1.4899076
- Virtual Inertia Control of D-PMSG Based on the Principle of Active Disturbance Rejection Control vol.10, pp.5, 2015, https://doi.org/10.5370/JEET.2015.10.5.1969