A Kalman Filter Based Technique for Stator Turn-Fault Detection of the Induction Motors
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Abstract
Monitoring of the Induction Motors (IMs) through stator current for different faults diagnosis has considerable economic and technical advantages in comparison with the other techniques in this content. Among different faults of an IM, stator and bearing faults are more probable types, which can be detected by analyzing signatures of the stator currents. One of the most reliable indicators for fault detection of IMs is lower sidebands of power frequency in the stator currents. This paper deals with a novel simple technique for detecting stator turn-fault of the IMs. Frequencies of the lower sidebands are determined using the motor specifications and their amplitudes are estimated by a Kalman Filter (KF). Instantaneous Total Harmonic Distortion (ITHD) of these harmonics is calculated. Since variation of the ITHD for the three-phase currents is considerable in case of stator turn-fault, the fault can be detected using this criterion, confidently. Different simulation results verify high performance of the proposed method. The performance of the method is also confirmed using some experiments.
Appendix
Kalman filter process:
1. Set initial estimate of the state vector and its error covariance matrix (
2. Compute the filter gain at instant n by:
3. Update the estimate using the measurement at instant n by:
where,
4. Compute the error covariance for the update estimate using:
5. Project the filter ahead as:
6. Start from 2.
Nomenclature
Stator short-circuit current
Mutual inductance between stator windings
Self-inductance of the stator windings
Number of short-circuit turns
Total number of stator winding in each phase
Number of IM poles and pole pairs, respectively
Stator short-circuit resistance
Three-phase stator winding resistances
Three-phase rotor winding resistances
Electromagnetic torque
The load torque
The damping torque
Three-phase stator voltages and currents
Three-phase rotor voltages and currents
Three-phase stator fluxes
Three-phase rotor fluxes
Leakage flux
Magnetizing flux
Stator short-circuit flux
The rotor velocity
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Artikel in diesem Heft
- Placement of Synchronized Measurements for Power System Observability during Cascaded Outages
- A Methodology to Prevent Failure in Single Pole Reclosing Operations
- Load Model Verification, Validation and Calibration Framework by Statistical Analysis on Field Data
- A Kalman Filter Based Technique for Stator Turn-Fault Detection of the Induction Motors
- Multi-objective Design Method for Hybrid Active Power Filter
- A Study on Effect of Concrete Foundations on Resistance and Surface Potentials of Gas Insulated Substation Grounding Systems
- Access Selection Algorithm of Heterogeneous Wireless Networks for Smart Distribution Grid Based on Entropy-Weight and Rough Set
- Voltage Sag due to Pollution Induced Flashover Across Ceramic Insulator Strings
- Study on a Novel Bearing Fault Diagnosis Method from Frequency and Energy Perspective
