Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/JEET.2015.10.2.504
Title & Authors
Hierarchical Voltage Control of a Wind Power Plant Using the Adaptive IQ-V Characteristic of a Doubly-Fed Induction Generator Kim, Jinho; Park, Geon; Seok, Jul-Ki; Lee, Byongjun; Kang, Yong Cheol;
Because wind generators (WGs) in a wind power plant (WPP) produce different active powers due to wake effects, the reactive power capability of each WG is different. This paper proposes a hierarchical voltage control scheme for a WPP that uses a WPP controller and WG controller. In the proposed scheme, the WPP controller determines a voltage error signal by using a PI controller and sends it to a doubly-fed induction generator (DFIG). Based on the reactive current-voltage () characteristic of a DFIG, the DFIG injects an appropriate reactive power corresponding to the voltage error signal. To enhance the voltage recovery capability, the gains of the characteristic of a DFIG are modified depending on its reactive current capability so that a DFIG with greater reactive current capability may inject more reactive power. The proposed scheme enables the WPP to recover the voltage at the point of common coupling (PCC) to the nominal value within a short time after a disturbance by using the adaptive characteristics of a DFIG. The performance of the proposed scheme was investigated for a 100 MW WPP consisting of 20 units of 5 MW DFIGs for small and larger disturbances. The results show the proposed scheme successfully recovers the PCC voltage within a short time after a disturbance.
Hierarchical voltage control;DFIG;Wake effect;Reactive current capability;
Remote Monitoring with Hierarchical Network Architectures for Large-Scale Wind Power Farms, Journal of Electrical Engineering and Technology, 2015, 10, 3, 1319
Critical Short Circuit Ratio Analysis on DFIG Wind Farm with Vector Power Control and Synchronized Control, Journal of Electrical Engineering and Technology, 2016, 11, 2, 320
Transient voltage control of a DFIG-based wind power plant for suppressing overvoltage using a reactive current reduction loop, Journal of International Council on Electrical Engineering, 2016, 6, 1, 140
M. Tsili and S. Papathanassiou, “A review of grid code technical requirements for wind farms,” IET Renewable Power Generation, vol. 3, no. 3, pp. 308-332., Sept. 2009.
E.ON Netz GmbH, “Grid Code: High and Extra High Voltage”, Aug. 2006.
H. Geng, C. Liu, and G. Yang, “LVRT capability of DFIG-based WECS under asymmetrical grid fault condition”, IEEE Trans. on Industrial Electronics, vol. 60, no. 6, pp. 2495-2509, Jun. 2013.
A. Tapia, G. Tapia, and J. X. Ostolaza, “Reactive power control of wind farms for voltage control applications,” Renew. Energy, vol. 29, no. 3, pp. 377-392, Mar. 2004.
D. Hansen, P. Sorensen, F. Iov, and F. Blaabjerg, “Centralised power control of wind farm with doubly fed induction generators,” Renew. Energy, vol. 31, no. 7, pp. 935-951, Jun. 2006.
M. E. Moursi, G. Joos, and C. Abbey, “A secondary voltage control strategy for transmission level interconnection of wind generation,” IEEE Trans. on Power Electronics, vol. 23, no. 3, pp. 1178-1190, May 2008.
J. Fortmann and I. Erlich, “Use of a deadband in reactive power control requirements for wind turbines in European grid code”, 11th international workshop on large-scale integration of wind power into power systems, Lisbon, Portugal, 13-15 Nov. 2012.
National Grid, “The Grid Code– Issue 4, Revision 5”, 31st Dec. 2010.
B. Shen, B. Mwinyiwiwa, Y. Zhang, and B. Ooi, “Sensorless Maximum Power Point Tracking of Wind by DFIG Using Rotor Position Phase Lock Loop,” IEEE Trans. on Power Electronics, Vol. 24, No. 4, pp. 942-951, Apr. 2009.
T. Lund, P. Sorensen, and J. Eek, “Reactive power capability of a wind turbine with doubly fed induction generator,” Wind energy, vol. 10, pp. 379-394, Apr. 2007.
S. N. Singh, J. Østergaard, and B. Singh, “Reactive power capability of unified DFIG for wind power generation,” in Proc. IEEE Power & Energy Society General Meeting, Minneapolis, MN, USA, pp. 1-7, Jul. 2010.
F. Koch, M. Gresch, F. Shewarega, I. Erlich, and U. Bachmann “Consideration of wind farm wake effect in power system dynamic simulation,” Power Tech, Russia, Jun. 2005.