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Life Estimation & Maintenance of Generator Stator Coil Insulation |
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General
The deterioration of generator stator coil insulation influences the life of generator. Operating temperature, operating voltage stress, thermal-cycle stress cause damage to the stator insulation. Therefore it is necessary for judgement of insulation deterioration to carry out a diagnostic test of the stator coil.
To evaluate the residual life from experience and the accumulated data, the following methods are employed:
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Method |
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(1)Consumed Life : |
Estimate Consumption of Life by "Operational History" and "Establishment of calculation method for residual break-down voltage" |
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(2)Residual Life : |
Estimate Residual Life by "Consumed Life", "Establishment of calculation method for residual break- down voltage" and "Operation Pattern in the future". |
Further, Visual inspection and Diagnostic test are conducted to obtain more accurate residual life taken other factors such as moisture & foreign conductive matter into consideration.
From these results, preventive maintenance program will be prepared for generator.
Flow Chart of Generator Life Estimation
Establishment of Calculation Method for Residual Break-Down Voltage
Operation Pattern in The Future
Diagnostic Test - Judgment of Insulation Deterioration
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| Flow Chart of Generator Life Estimation |
Life Estimation & Maintenance
of Generator Stator Coil Insulation
Evaluation of Epoxy-Resin Coil Deterioration with Operational History & Diagnostic Test |
| Establishment Of Calculation Method For Residual Break-Down Voltage & Operation Pattern In The Future FUTURE |
Life Estimation & Maintenance
of Generator Stator Coil Insulation
Evaluation of Epoxy-Resin Coil Deterioration with Operational History & Diagnostic Test |
| Diagnostic Test - Judgment Of Insulation Deterioration |
Life Estimation & Maintenance
of Generator Stator Coil Insulation
Evaluation of Epoxy-Resin Coil Deterioration with Operational History & Diagnostic Test |
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