Impact of Mechanical Power Variation on Transient Stability of DFIG-based Wind Turbine

2018 ◽  
Author(s):  
Wangqianyun Tang ◽  
Jiabing Hu ◽  
Rui Zhang
Keyword(s):  
Wind Turbine ◽  
Transient Stability ◽  
Mechanical Power ◽  
Power Variation

scholarly journals Design of a Mechanical Power Circulation Test Rig for a Wind Turbine Gearbox

2020 ◽  
Vol 10 (9) ◽  
pp. 3240
Author(s):  
Geun-Ho Lee ◽  
Young-Jun Park ◽  
Ju-Seok Nam ◽  
Joo-Young Oh ◽  
Jeong-Gil Kim
Keyword(s):  
Control System ◽  
Wind Turbine ◽  
Mechanical Power ◽  
Hydraulic Control ◽  
Test Rig ◽  
Wind Turbine Gearbox ◽  
Planetary Gearbox ◽  
Bearing Life ◽  
And Control ◽  
Hydraulic Control System

We developed a mechanical power circulation test rig for a wind turbine gearbox with a power rating of 5.8 MW or less. The test rig consists of an electric motor, two auxiliary gearboxes, a torque-applying device, lubrication systems, cooling systems, and control systems. The torque generating device consists of a planetary gearbox and a hydraulic control system and is used to apply the desired torque to the test gearbox. The hydraulic control system applies the torque on the ring gear of the planetary gearbox. The gears and bearings of the two auxiliary gearboxes and planetary gearboxes met the design criteria for a safety factor of over 1.2 and a bearing life of 30,000 h. In addition, the master and slave gearboxes were connected to the test rig to verify whether the torque-applying device had applied variable torque in real-time during the test. The device was only able to induce a variable torque of up to 45.2 kN-m due to the limitation of the rated torque of the master and slave gearboxes. The test rig can test not only efficiency, vibration, and noise but also durability and overloading.

Heuristic Coupling Design-Optimization between a Variable Speed Generator and a Wind Rotor

2017 ◽  
Vol 32 ◽  
pp. 133-138
Author(s):  
Cherif Khelifi ◽  
Fateh Ferroudji ◽  
Farouk Meguellati ◽  
Khaled Koussa
Keyword(s):  
Wind Turbine ◽  
Output Power ◽  
Wind Turbines ◽  
Electricity Market ◽  
Maximum Output Power ◽  
Vertical Axis ◽  
Mechanical Power ◽  
Maximum Output ◽  
Variable Speed ◽  
Electric Generator

A high emergence of wind energy into the electricity market needs a parallel efficient advance of wind power forecasting models. Determining optimal specific speed and drive-train ratio is crucial to describe, comprehend and optimize the coupling design between a wind turbine-rotor and an electric generator (EG) to capture maximum output power from the wind. The selection of the specific design speed to drive a generator is limited. It varies from (1-4) for vertical axis wind turbines and (6-8) for horizontal axis wind turbines. Typically, the solution is an iterative procedure, for selecting the adequate multiplier ratio giving the output power curve. The latter must be relatively appreciated to inlet and nominal rated wind speeds. However, instead of this tedious and costly method, in the present paper we are developing a novel heuristic coupling approach, which is economical, easy to describe and applicable for all types of variable speed wind turbines (VSWTs). The principle method is based on the fact that the mechanical power needed of the wind turbine (WT) to drive the EG must be permanently closer to the maximum mechanical power generated by the (WT).

scholarly journals Fault-Ride Trough Validation of IEC 61400-27-1 Type 3 and Type 4 Models of Different Wind Turbine Manufacturers

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3039 ◽  
Author(s):  
Andrés Honrubia-Escribano ◽  
Francisco Jiménez-Buendía ◽  
Jorge Luis Sosa-Avendaño ◽  
Pascal Gartmann ◽  
Sebastian Frahm ◽  
...  
Keyword(s):  
Power Systems ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Transient Stability ◽  
Dynamic Models ◽  
Variable Speed ◽  
Generic Models ◽  
Voltage Dip ◽  
Converter Topology ◽  
Type 3

The participation of wind power in the energy mix of current power systems is progressively increasing, with variable-speed wind turbines being the leading technology in recent years. In this line, dynamic models of wind turbines able to emulate their response against grid disturbances, such as voltage dips, are required. To address this issue, the International Electronic Commission (IEC) 61400-27-1, published in 2015, defined four generic models of wind turbines for transient stability analysis. To achieve a widespread use of these generic wind turbine models, validations with field data are required. This paper performs the validation of three generic IEC 61400-27-1 variable-speed wind turbine model topologies (type 3A, type 3B and type 4A). The validation is implemented by comparing simulation results with voltage dip measurements performed on six different commercial wind turbines based on field campaigns conducted by three wind turbine manufacturers. Both IEC validation approaches, the play-back and the full system simulation, were implemented. The results show that the generic full-scale converter topology is accurately adjusted to the different real wind turbines and, hence, manufacturers are encouraged to the develop generic IEC models.

Transient Stability of Wind Power System with DFIG

2014 ◽  
Vol 986-987 ◽  
pp. 635-638
Author(s):  
Li Sa Guo
Keyword(s):  
Mathematical Model ◽  
Power System ◽  
Wind Turbine ◽  
Wind Power ◽  
Pitch Angle ◽  
Transient Stability ◽  
Equivalent Model ◽  
Wind Power System ◽  
Doubly Fed ◽  
Infinite Power

Analyzed mathematical model of wind power which consist doubly-fed wind turbine (DFIG).Strategies for pitch angle control were developed.Used MATLAB to establish equivalent model contain infinite power system concluding DFIG ,The results showed that wind power with DFIG have good transient stability.

scholarly journals The Research on Second-Order ADRC Algorithm of Using Wind Turbine Virtual Inertia to Participate in Primary Frequency Regulation in a Small Stand-Alone Microgrid

2018 ◽  
Vol 2018 ◽  
pp. 1-13
Author(s):  
Wang Yi ◽  
Jiang Hanhong ◽  
Xing Pengxiang
Keyword(s):  
Wind Turbine ◽  
Transient Stability ◽  
Synchronous Generator ◽  
Second Order ◽  
Frequency Regulation ◽  
Regulation Mechanism ◽  
Direct Drive ◽  
Virtual Inertia ◽  
Inertia Control ◽  
Primary Frequency

In order to improve the transient stability of frequency in a small stand-alone microgrid (SSM), this paper takes a SSM composed of a direct-drive permanent magnet synchronous generator (D-PMSG) and a micro gas turbine (MGT) as the background and uses wind turbine generator (WTG) virtual inertia (VI) to participate in the primary (short-term) system frequency regulation. First of all, this paper constructs a grid-connected model composed of a WTG and a MGT, analyzes the WTG virtual inertia frequency regulation mechanism, and explains the principle of proportional-differentiation (PD) virtual inertia control (VIC) and its shortcomings. Secondly, the paper introduces the structure principle of n-order active disturbance rejection control (ADRC) and deduces the design process of second-order ADRC-VIC. Finally, through the simulation and experimental verification, comparing the frequency perturbation of without-VIC, PD-VIC, and ADRC-VIC, it is concluded that PD-VIC and ADRC-VIC both can use the WTG virtual inertia to participate in the primary frequency regulation. The frequency regulation effect of ADRC-VIC is better than PD-VIC, ADRC-VIC can extend the rotor speed recovery time and avoid overshoot, and its frequency fluctuation amplitude and settling time are obviously improved, and ADRC-VIC can effectively avoid the overshoot phenomenon of the MGT output power.

Analysis and estimation of transient stability for a grid-connected wind turbine with induction generator

2011 ◽  
Vol 36 (5) ◽  
pp. 1469-1476 ◽  
Author(s):  
H. Li ◽  
B. Zhao ◽  
C. Yang ◽  
H.W. Chen ◽  
Z. Chen
Keyword(s):  
Wind Turbine ◽  
Transient Stability ◽  
Induction Generator
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