Fault Diagnosis of Inter-turn Short Circuit in Rotor Winding of Doubly-fed Generator Based on Data Fusion of Multi-flux Sensors

2021 ◽  
Author(s):  
Feng Liang ◽  
Yu Chen ◽  
Shouwang Zhao ◽  
Attiq Ur Rehman ◽  
Shuang Wang ◽  
...  
Keyword(s):  
Fault Diagnosis ◽  
Data Fusion ◽  
Short Circuit ◽  
Doubly Fed ◽  
Rotor Winding ◽  
Doubly Fed Generator

scholarly journals Fault Diagnostic of Doubly-Fed Induction Generator in Stator Inter-Turn Short Circuit Based Wind Turbine

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
N. Boumalha ◽  
R. Hachelef ◽  
D. Kouchih ◽  
M. Tadjine ◽  
M.S. Boucherit
Keyword(s):  
Wind Turbine ◽  
Reactive Power ◽  
Fault Tolerant ◽  
Short Circuit ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Wind Speed Maximum ◽  
Power Point ◽  
Doubly Fed ◽  
Rotor Winding

This paper describes a Fault Tolerant Control (FTC) of a doubly-fed induction generator (DFIG) based wind turbine model suitable for the simulation of this generator in the mode faulty mode. The dynamic model of a DFIG with stator inter-turn short circuit fault is proposed. A model (abc) is developed, which can represent both the healthy and faulty conditions. The DFIG is directly connected to the grid whereas the rotor winding is fed by back-to-back PWM converters .the Control schemes for active and reactive power regulation are designed firstly. Under different wind speed, maximum power point tracing (MPPT) control is implemented to ensure the optimum active power output. The numerical simulation developed in Matlab/Simulink studies the effects of stator inter-turn short-circuit in the DFIG. Afterward, the application of Approach technique of Adaptive Obs

Vibration Fault Diagnosis Method Based on Compositive Characteristics of Rotor Vibration and Stator Current

2007 ◽  
Author(s):  
Shuting Wan ◽  
Yonggang Li
Keyword(s):  
Fault Diagnosis ◽  
Short Circuit ◽  
Air Gap ◽  
Vibration Characteristics ◽  
Rotor Vibration ◽  
Stator Current ◽  
Dynamic Eccentricity ◽  
Diagnosis Method ◽  
Current Characteristics ◽  
Rotor Winding

Rotor vibration characteristics are first analyzed, when the rotor winding inter-turn short circuit fault, the air-gap dynamic eccentricity fault, the air-gap static eccentricity fault and the imbalance fault occurs. Next, the generator stator current characteristics on the faults also were analyzed, the results show that the faults can’t be diagnosed based only on rotor vibration characteristics or stator current characteristics. But considering the differences of compositive characteristics of the rotor vibration and stator current caused by different rotor faults, a new method of generator vibration fault diagnosis, based on compositive characteristics, is developed. Finally, the rotor vibration and stator current of a type SDF-9 generator is measured in the laboratory to verify the theoretical analysis presented above.

Study on Unbalanced Electromagnetic Force of Turbine-Generator Inter Turn Short Circuit and its Relevant Fault

2013 ◽  
Vol 427-429 ◽  
pp. 230-234
Author(s):  
Wen Jing Zhang ◽  
Yong Gang Li ◽  
Yu Ca Wu
Keyword(s):  
Finite Element ◽  
Fault Diagnosis ◽  
Electromagnetic Force ◽  
Short Circuit ◽  
Turbine Generator ◽  
Element Simulation ◽  
Rotor Winding ◽  
Relationship Of ◽  
Short Circuit Fault ◽  
The Relationship

Inter turn short circuit fault is very common for turbine-generator, which will produce unbalanced electromagnetic force (UEMF) together with its relevant fault, namely dynamic eccentric, on the rotor. After complete finite element simulation by ANSYS, The relationship of rotor winding short positions and short degrees with UEMF were studied. And then, only the dynamic eccentric fault occurs, the relations of dynamic eccentric angles and dynamic eccentric degrees with UEMF were discussed as well. Whats more, by comprehensive consideration of the two faults, the characteristic of the force and its change law were researched. This paper provides a viable path to study the vibration law and fault diagnosis of turbine-generator in multi-source stress.

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