Design and Simulation of Variable Speed Constant Frequency Brushless Doubly Fed Wind Power Generator

2011 ◽  
Vol 383-390 ◽  
pp. 537-542
Author(s):  
Kai Jun Wu ◽  
Yan Yan Wang
Keyword(s):  
Wind Power ◽  
Reactive Power ◽  
Variable Structure ◽  
Constant Frequency ◽  
Power Generator ◽  
Structure Control ◽  
Power Decoupling ◽  
Wind Power Generator ◽  
Doubly Fed ◽  
And Control

Brushless Doubly-fed Machine (BDFM) is a new inverter-driven induction motor, and it has broad prospects in wind power generation. This paper analyses the structure and VSCF electricity generating principle of a cascade Brushless Doubly fed Wind Power Generator, deduces the BDFG’s mathematical model, The variable structure control (VSC) was used to the active and reactive power decoupling control of the BDFM, analysis the relation of electromagnetism and energy balance .Finally, simulation and analysis of the whole system and control strategy are carried through in matlab/simulink soft. According to these results, the correct of parameters and simulation model for BDFM is proved.

Modeling and Simulation of Doubly-Fed Wind Power Generators Based on PSCAD/EMTDC

2013 ◽  
Vol 392 ◽  
pp. 475-479
Author(s):  
Le Wang ◽  
Lin Guan ◽  
Xin Ming Fan
Keyword(s):  
Wind Power ◽  
Reactive Power ◽  
Operating Characteristics ◽  
Field Orientation ◽  
Power Generators ◽  
Response Characteristics ◽  
Active And Reactive Power ◽  
Power Decoupling ◽  
Wind Power Generator ◽  
Doubly Fed

This paper builds the mathematical model of a doubly-fed wind power generator (DFIG) which is widely used in wind power generation. Based on stator magnetic field orientation vector technique, active and reactive power decoupling control strategy is constructed. Based on the software package PSCAD/EMTDC, the grid-connected system of DFIG is modeled, and the dynamic response characteristics of generators active and reactive power on ramp change of wind speed conditions is simulated and analyzed. The simulation results show that the variable pitch DFIG has good operating characteristics and the model is correct.

Analysis on Operation Principle of Doubly-Fed Wind Power Generator

2012 ◽  
Vol 220-223 ◽  
pp. 448-451
Author(s):  
Bing Wu ◽  
Jian Liang Wang
Keyword(s):  
Energy Transfer ◽  
Equivalent Circuit ◽  
Wind Power ◽  
Basic Theory ◽  
Power Network ◽  
Power Generator ◽  
Ac Motor ◽  
Wind Power Generator ◽  
Doubly Fed ◽  
And Control

Basing on its advantages, doubly-fed wind power generator has become one of mainstream model of wind power generator which is connected with power network directly. But at present there is no relevant articles that can describe the operation principle of doubly-fed wind power generator in detail. The electromagnetism relation of doubly-fed wind power generator is discussed detailedly in this paper based on the basic theory of AC motor, and finds the equivalent circuit and vectorgraph, analyzes the energy transfer relation. This thesis offers theory basis for the design and control of doubly-fed wind power generator.

The Strategy Research for Doubly-Fed Wind Power Generator Active-Reactive Hybrid Additional Damping Control

2013 ◽  
Vol 805-806 ◽  
pp. 320-326
Author(s):  
Wei Wei ◽  
Li Jie Ding ◽  
Ying Liu ◽  
Gan Li
Keyword(s):  
Wind Power ◽  
Reactive Power ◽  
Control Method ◽  
Hybrid Control ◽  
Control Function ◽  
Operating Conditions ◽  
Constant Frequency ◽  
Wind Generator ◽  
Wind Power Generator ◽  
Doubly Fed

Based on the traditional single power control of the doubly-fed wind generator, this paper proposes an active/reactive power hybrid control method of the doubly-fed wind generator, which associates the operation characteristics of the doubly-fed wind generator with the operating conditions of the power grid. This proposed method incorporates the power variation in the system transmission channel into the calculation of the wind generator power output, and employs the additional control function of the wind generator to increase system damping and restrain system power oscillation. At the same time, the proposed method controls the wind generator to capture the maximum wind power when it is operating at a variable speed with a constant frequency. Moreover, because the proposed method decouples the control of active and reactive power, the converter capacity can be reduced. Simulations in a 9-generator 13-bus system and results indicate the effectiveness and robustness of the proposed method.

A Planet Bearing Fault Case of Wind Turbine Gearbox

2014 ◽  
Vol 953-954 ◽  
pp. 472-477 ◽  
Author(s):  
Jia Xu ◽  
Jin Zhang ◽  
Tie Chen ◽  
Rui Hua Liu
Keyword(s):  
Wind Power ◽  
Typical Case ◽  
Wind Turbine Gearbox ◽  
Power Generator ◽  
Bearing Fault ◽  
Gear Fault ◽  
Wind Power Generator ◽  
Speed Up ◽  
Planet Gear ◽  
Doubly Fed

Doubly-fed wind power generator takes the largest share of wind energy. However, as the most important part, the speed-up gearbox is easy to be damaged. The existing researches about gearbox faults are mainly about gear fault, the study of bearing fault is relatively less compared with gear fault, expecially for the bearing fault of planet gear. This article presents a typical case of bearing fault about planet gear, which contains the cause of vibration behaviour and the analysis of fault.

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