TY - JOUR
T1 - A Simplified Stator Frequency and Power Control Method of DFIG-DC System Without Stator Voltage and Current Sensors
AU - Wu, Chao
AU - Jiao, Yingzong
AU - Nian, Heng
AU - Blaabjerg, Frede
PY - 2020/6
Y1 - 2020/6
N2 - The primary objective of the grid connected DFIG-DC system is to achieve the accurate control of stator frequency and active power. In this letter, a simplified power control method is proposed by just controlling the magnitude of the rotor current vector, which can avoid the stator voltage and current sensors. The stator active power is calculated by the product of dc voltage and dc current. The stator frequency is simply controlled by the rotating speed of the rotor current vector, which is achieved through a given rotating frame. Furthermore, the parameter dependence and dc sampling offset problems can be eliminated because the voltage model or current model, which are usually used for acquiring stator frequency and stator flux angle, can be avoided. Therefore, the robustness and stability of the stator frequency and power control can be improved. Finally, experiments based on a 1 kW DFIG-DC setup are carried out to verify the proposed method.
AB - The primary objective of the grid connected DFIG-DC system is to achieve the accurate control of stator frequency and active power. In this letter, a simplified power control method is proposed by just controlling the magnitude of the rotor current vector, which can avoid the stator voltage and current sensors. The stator active power is calculated by the product of dc voltage and dc current. The stator frequency is simply controlled by the rotating speed of the rotor current vector, which is achieved through a given rotating frame. Furthermore, the parameter dependence and dc sampling offset problems can be eliminated because the voltage model or current model, which are usually used for acquiring stator frequency and stator flux angle, can be avoided. Therefore, the robustness and stability of the stator frequency and power control can be improved. Finally, experiments based on a 1 kW DFIG-DC setup are carried out to verify the proposed method.
KW - Doubly-fed induction generator
KW - reduced sensors
KW - robustness
KW - simplified stator frequency and power control
UR - http://www.scopus.com/inward/record.url?scp=85080967630&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2019.2953677
DO - 10.1109/TPEL.2019.2953677
M3 - Journal article
SN - 0885-8993
VL - 35
SP - 5562
EP - 5566
JO - I E E E Transactions on Power Electronics
JF - I E E E Transactions on Power Electronics
IS - 6
M1 - 8907439
ER -