TY - JOUR
T1 - Comparative studies on control systems for a two-blade variable-speed wind turbine with a speed exclusion zone
AU - Yang, Jian
AU - Song, Dongran
AU - Dong, Mi
AU - Chen, Sifan
AU - Zou, Libing
AU - Guerrero, Josep M.
PY - 2016/8
Y1 - 2016/8
N2 - To avoid the coincidence between the tower nature frequency and rotational excitation frequency, a SEZ (speed exclusion zone) must be built for a two-blade wind turbine with a full rated converter. According to the literature, two methods of SEZ-crossing could be adopted. However, none of them have been studied in industrial applications, and their performance remains unclear. Moreover, strategies on power regulation operation are not covered. To fully investigate them, this paper develops two control systems for a two-blade WT (wind turbines) with a SEZ. Because control systems play vital roles in determining the performance of the WT, this paper focuses on comparative studies on their operation strategies and performance. In these strategies, optimal designs are introduced to improve existing SEZ algorithms. Moreover, to perform power regulation outside the SEZ, two operation modes are divided in the proposed down power regulation solutions. The developed control systems' performance is confirmed by simulations and field tests. Two control systems present similar capabilities of power production and SEZ-bridging. Nevertheless, at the cost of significantly increased tower loads, one captures 1% more energy than the other. Overall consideration must be made for the control system selection for a WT with a SEZ.
AB - To avoid the coincidence between the tower nature frequency and rotational excitation frequency, a SEZ (speed exclusion zone) must be built for a two-blade wind turbine with a full rated converter. According to the literature, two methods of SEZ-crossing could be adopted. However, none of them have been studied in industrial applications, and their performance remains unclear. Moreover, strategies on power regulation operation are not covered. To fully investigate them, this paper develops two control systems for a two-blade WT (wind turbines) with a SEZ. Because control systems play vital roles in determining the performance of the WT, this paper focuses on comparative studies on their operation strategies and performance. In these strategies, optimal designs are introduced to improve existing SEZ algorithms. Moreover, to perform power regulation outside the SEZ, two operation modes are divided in the proposed down power regulation solutions. The developed control systems' performance is confirmed by simulations and field tests. Two control systems present similar capabilities of power production and SEZ-bridging. Nevertheless, at the cost of significantly increased tower loads, one captures 1% more energy than the other. Overall consideration must be made for the control system selection for a WT with a SEZ.
KW - Control system
KW - Power capture
KW - Speed exclusion zone
KW - Tower loads
KW - Tower resonance
KW - Two-blade variable speed wind turbine
UR - http://www.scopus.com/inward/record.url?scp=84969134508&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2016.04.106
DO - 10.1016/j.energy.2016.04.106
M3 - Journal article
AN - SCOPUS:84969134508
SN - 0360-5442
VL - 109
SP - 294
EP - 309
JO - Energy
JF - Energy
ER -