TY - JOUR
T1 - Integral sliding-mode direct torque control of doubly-fed induction generators under unbalanced grid voltage
AU - Chen, Si Zhe
AU - Cheung, Norbert C.
AU - Chung Wong, Ka
AU - Wu, Jie
N1 - Funding Information:
Manuscript received June 1, 2009; revised September 15, 2009; accepted October 30, 2009. Date of publication December 15, 2009; date of current version May 21, 2010. This work was supported in part by the National Natural Science Foundation of China under Grant 60534040 and the National High Technology Research and Development of China under Project 863 Program 2007AA05Z244. The work of S. Z. Chen was supported by the Hong Kong Polytechnic University under Grant G-U497. Paper no. TEC-00218-2009.
PY - 2010/6
Y1 - 2010/6
N2 - An integral sliding-mode direct torque control (ISM-DTC) scheme with space-vector modulation for wind-energy conversion systems based on doubly-fed induction generators (DFIGs) under unbalanced grid voltage is proposed. The torque and power pulsations at twice the grid frequency caused by unbalanced grid voltage can be minimized by the proposed ISM-DTC scheme. Compared with existing control schemes of DFIGs under unbalanced grid voltage, the parametric uncertainties are included into the design procedure of sliding-mode controller, which guarantees the robustness of the controller. Because the torque and reactive power are directly controlled by the rotor voltage, the measurement, coordinate transformation, and symmetrical component extraction of rotor current are eliminated, which simplifies the structure of the controller. Simulation and hardware implementation results validate the effect and parametric robustness of the proposed ISM-DTC scheme.
AB - An integral sliding-mode direct torque control (ISM-DTC) scheme with space-vector modulation for wind-energy conversion systems based on doubly-fed induction generators (DFIGs) under unbalanced grid voltage is proposed. The torque and power pulsations at twice the grid frequency caused by unbalanced grid voltage can be minimized by the proposed ISM-DTC scheme. Compared with existing control schemes of DFIGs under unbalanced grid voltage, the parametric uncertainties are included into the design procedure of sliding-mode controller, which guarantees the robustness of the controller. Because the torque and reactive power are directly controlled by the rotor voltage, the measurement, coordinate transformation, and symmetrical component extraction of rotor current are eliminated, which simplifies the structure of the controller. Simulation and hardware implementation results validate the effect and parametric robustness of the proposed ISM-DTC scheme.
KW - Direct torque control (DTC)
KW - Doubly-fed induction generator (DFIG)
KW - Integral sliding-mode control
KW - Unbalanced grid voltage
KW - Wind-energy generation
UR - http://www.scopus.com/inward/record.url?scp=77952951957&partnerID=8YFLogxK
U2 - 10.1109/TEC.2009.2036249
DO - 10.1109/TEC.2009.2036249
M3 - Article
AN - SCOPUS:77952951957
SN - 0885-8969
VL - 25
SP - 356
EP - 368
JO - IEEE Transactions on Energy Conversion
JF - IEEE Transactions on Energy Conversion
IS - 2
M1 - 5353677
ER -