Centring in Magnetic Field of the Hydro Generator Rotors Using Orbit Diagram

The paper deals with a data acquisition and processing method for evaluating the unilateral magnetic pull and a procedure for magnetic centring of synchronous hydro generators rotors using a dedicated system for electrical machines, developed on the LabVIEW National Instruments environment. Finally, the experimental results are presented before and after the application of the procedure for reducing the unilateral pulls obtained for a synchronous hydro generator of 9330 kVA and 215 rpm. The presented method can be useful in the frame of refurbishment procedures of synchronous hydro generators.

[1]  Jan-Olov Aidanpää,et al.  A Methodology for Protective Vibration Monitoring of Hydropower Units Based on the Mechanical Properties. , 2013, Journal of dynamic systems, measurement, and control.

[2]  J. F. Lyles,et al.  Vertical hydraulic generators experience with dynamic air gap monitoring , 1992 .

[3]  Yu Yan,et al.  Rotor Fault Diagnosis and Simulation Based on LabVIEW , 2013 .

[4]  O. Prostean,et al.  Issues regarding the modeling and simulation of wind energy conversion system’s components , 2008, 2008 IEEE International Conference on Automation, Quality and Testing, Robotics.

[5]  Jean-Jacques Simond,et al.  A New Inductive Air-Gap Monitoring System for Large Low Speed Hydro-Generators, Tests in Operation , 2008 .

[6]  Weiji Wang,et al.  Purification and feature extraction of shaft orbits for diagnosing large rotating machinery , 2005 .

[7]  A. Merkhouf,et al.  Influence of the air gap length on the magnetic core loss in large hydro generator , 2012, 2012 XXth International Conference on Electrical Machines.

[8]  Mats Leijon,et al.  Influence on the stability of generator rotors due to radial and tangential magnetic pull force , 2007 .

[9]  Vladimir Cretu,et al.  Testing of electrical machines in periodical and quasi-periodical conditions, using a data acquisition and processing system , 1998, IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222).

[10]  Jan-Olov Aidanpää,et al.  Dynamic Consequences of Electromagnetic Pull Due to Deviations in Generator Shape , 2007 .

[11]  Jianzhong Zhou,et al.  A new method for automatically identifying the shaft orbit moving direction of hydroelectric generating set , 2010 .

[12]  Fulei Chu,et al.  THE UNBALANCED MAGNETIC PULL AND ITS EFFECTS ON VIBRATION IN A THREE-PHASE GENERATOR WITH ECCENTRIC ROTOR , 2002 .

[13]  A. Tetreault.  Rotor shape vs. rotor field pole shorted turns: Impact on rotor induced vibrations on hydrogenerators , 2012, 2012 IEEE International Conference on Condition Monitoring and Diagnosis.

[14]  Yogeshwarsing Calleecharan,et al.  On the dynamics of an hydropower generator subjected to unbalanced magnetic pull , 2011 .

[15]  O. Prostean,et al.  Computer Aided Testing of Electrical Machines , 2007, EUROCON 2007 - The International Conference on "Computer as a Tool".