المؤلفون: Zhu, Donghai, Wang, Zhen, Hu, Jiabing, Zou, Xudong, Kang, Yong, Guerrero, Josep M.

المصدر: Zhu , D , Wang , Z , Hu , J , Zou , X , Kang , Y & Guerrero , J M 2024 , ' Rethinking Fault Ride-Through Control of DFIG-Based Wind Turbines from New Perspective of Rotor-Port Impedance Characteristics ' , IEEE Transactions on Sustainable Energy , vol. 15 , no. 3 , pp. 2050-2062 . https://doi.org/10.1109/TSTE.2024.3395985Test

مصطلحات موضوعية: Circuit faults, DFIG-based wind turbine, Doubly fed induction generators, essential relations, fault ride through (FRT), Impedance, quantitative evaluation, rotor-side port impedance characteristics (RPIC), Rotors, Stators, Transient analysis, Voltage control

الوصف: To achieve the fault ride through (FRT) operation of DFIG-based wind turbines, various improved control methods have been proposed. However, it is difficult to reveal their essential relations and quantitatively evaluate their performance differences, due to the wide assortment of solving ideas and control structures. To cope with this issue, this paper revisits the FRT control from a new perspective of rotor-port impedance characteristics (RPIC). First, a unified RPIC model of nine typical FRT controls is established and it is found that their RPIC are manifested as the pure inductance, but the inductance values are different in the phase sequence. Subsequently, the influence of RPIC on FRT performance is analyzed and some practical design guidelines for FRT control are given. On this basis, nine typical FRT control methods are quantitatively evaluated and compared in terms of six key performance dimensions. Moreover, the study contributes to the understanding, analysis and redesign of FRT control, and the RPIC perspective features the definite physical meaning and simple. Finally, the analysis is validated by the experiments.

العلاقة: https://vbn.aau.dk/da/publications/f447bb24-b5f8-4cf5-95bd-0eb1a4c7027aTest

الإتاحة: https://doi.org/10.1109/TSTE.2024.3395985Test
https://vbn.aau.dk/da/publications/f447bb24-b5f8-4cf5-95bd-0eb1a4c7027aTest
http://www.scopus.com/inward/record.url?scp=85192152300&partnerID=8YFLogxKTest

المؤلفون: Yang, Yihang, Zhu, Donghai, Zou, Xudong, Chi, Yongning, Kang, Yong

المصدر: IEEE Transactions on Power Electronics; Sep2022, Vol. 37 Issue 9, p10139-10143, 5p

مصطلحات موضوعية: WIND turbines, INDUCTION generators, SYNCHRONIZATION, REACTIVE power

مستخلص: Wind turbines (WTs) are prone to lose the synchronization during severe grid faults due to the absence of equilibrium point. To cope with the issue, this letter proposes a power compensation control for doubly fed induction generator based WT to enhance the transient synchronization stability from the new perspective of active power balance. In the method, the active power of WT is controlled to compensate the power loss on the network. Compared with the existing methods, the proposed method has more widely application scenarios because it avoids using the frequency error as control signal. Experimental tests are performed to validate proposed method. [ABSTRACT FROM AUTHOR]

: Copyright of IEEE Transactions on Power Electronics is the property of IEEE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Zhu, Donghai¹, Zou, Xudong¹, Deng, Lu², Huang, Qingjun³, Zhou, Shiying¹, Kang, Yong¹

المصدر: IEEE Transactions on Power Electronics. Nov2017, Vol. 32 Issue 11, p8514-8525. 12p.

مصطلحات موضوعية: INDUCTION generators, WIND turbine design & construction, ELECTRIC potential, ROTORS -- Design & construction, ELECTROMAGNETISM

مستخلص: For doubly fed induction generator (DFIG)-based wind turbines, the rotor side of DFIG is prone to suffering from overcurrent during grid faults, due to large electromotive force (EMF) induced in the rotor circuit. To solve this problem, this paper proposes an inductance-emulating control strategy for DFIG-based wind turbine to suppress the postfault rotor current, thereby enhancing its low-voltage ride through capability. Under the proposed control strategy, once the grid fault is detected, the rotor side converter (RSC) is controlled to emulate an inductance. Furthermore, with proper inductance value, both the required rotor voltage and postfault rotor current can be reduced within the permissible ranges of RSC, thus the controllability of control system can be maintained during transient process. Moreover, the oscillation of electromagnetic torque can be effectively suppressed during transient state of both grid fault and fault recovery. Finally, the simulation and experimental results are presented to demonstrate the effectiveness of the proposed method. [ABSTRACT FROM AUTHOR]

: Copyright of IEEE Transactions on Power Electronics is the property of IEEE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Zhu, Donghai¹, Zou, Xudong¹, Zhou, Shiying¹, Dong, Wen¹, Kang, Yong¹, Hu, Jiabing¹

المصدر: IEEE Transactions on Energy Conversion. Jun2018, Vol. 33 Issue 2, p670-681. 12p.

مصطلحات موضوعية: *ELECTRIC power distribution grids, PID controllers

مستخلص: For doubly fed induction generator (DFIG) based wind turbines, when severe grid faults occur, it is necessary to inject transient and negative-sequence components into the rotor current reference to achieve controllable low-voltage ride through (LVRT) capability. However, the classical proportional-integral (PI) controller cannot provide precise control of the transient and negative-sequence rotor current, because such current references in synchronous reference frame (SRF) are ac components at grid frequency and double grid frequency, respectively. To solve this problem, this paper proposes a feedforward current references control (FCRC) method for rotor-side converter to improve the system transient control performance. Under the proposed method, the additional feedforward of rotor current references is introduced into the current loop to improve its tracking capability of the aforementioned ac current references, thereby achieving the transient control targets precisely. Moreover, the proposed method will not affect the stability of the original current loop. Furthermore, the method has strong robustness against DFIG parameters deviation and grid frequency variations. In addition, the method is highly simple to implement. Finally, the validity of the proposed FCRC method is demonstrated by simulation and experiment. [ABSTRACT FROM AUTHOR]

: Copyright of IEEE Transactions on Energy Conversion is the property of IEEE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Huang, Qingjun¹, Zou, Xudong¹, Zhu, Donghai¹, Kang, Yong¹

المصدر: IEEE Transactions on Power Electronics. Mar2016, Vol. 31 Issue 3, p2150-2165. 16p.

مصطلحات موضوعية: *ELECTRIC power distribution grids, INDUCTION generators, ELECTRIC faults, CASCADE converters, LOW voltage systems, ELECTROMAGNETIC oscillations

مستخلص: For doubly fed induction generator (DFIG)-based wind turbine, the main constraint to ride-through serious grid faults is the limited converter rating. In order to realize controllable low voltage ride through (LVRT) under the typical converter rating, transient control reference usually need to be modified to adapt to the constraint of converter's maximum output voltage. Generally, the generation of such reference relies on observation of stator flux and even sequence separation. This is susceptible to observation errors during the fault transient; moreover, it increases the complexity of control system. For this issue, this paper proposes a scaled current tracking control for rotor-side converter (RSC) to enhance its LVRT capacity without flux observation. In this method, rotor current is controlled to track stator current in a certain scale. Under proper tracking coefficient, both the required rotor current and rotor voltage can be constrained within the permissible ranges of RSC, thus it can maintain DFIG under control to suppress overcurrent and overvoltage. Moreover, during fault transient, electromagnetic torque oscillations can be greatly suppressed. Based on it, certain additional positive-sequence item is injected into rotor current reference to supply dynamic reactive support. Simulation and experimental results demonstrate the feasibility of the proposed method. [ABSTRACT FROM PUBLISHER]

: Copyright of IEEE Transactions on Power Electronics is the property of IEEE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)