The Interpretation of Corona and Dielectric Measurements on the Mica-Asphalt Insulation of a 30-Year-Old WaterWheel Generator at Grand Coulee Dam
- 1 November 1973
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Apparatus and Systems
- Vol. PAS-92 (6) , 1935-1944
- https://doi.org/10.1109/tpas.1973.293573
Abstract
It is important to have reliable field techniques for assessing the insulation quaility of large rotating machine stators in order to reveal any defects which could lead to a winding failure in service. Toward this objective, a variety of nondestructive measurements of internal discharges (corona) have been applied and compared on an old mica-asphalt insulated generator. Extensive field measurements of RIV corona and integrated corona charge per cycle (related to power factor tip-up) are reported and interpreted, and verified by tests on coils returned to the laboratory.Keywords
This publication has 7 references indexed in Scilit:
- The Relationship Between the Picocoolomb and Microvolt for Corona Measurements on HV Transformers and Other ApparatusIEEE Transactions on Power Apparatus and Systems, 1973
- An Electromagnetic Probe for Detecting and Locating Discharges in Large Rotating-Machine StatorsIEEE Transactions on Power Apparatus and Systems, 1969
- A Capacitance Bridge Method for Measuring Integrated Corona-Charge Transfer and Power Loss per CycleTransactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1960
- The Relation of Capacitance Increase with High Voltages to Internal Electric Discharges and Discharging Void VolumeTransactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1959
- A Correlation of the Present with a Proposed Standard Method for RIV Measurements on High-Voltage DevicesTransactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1959
- The self-extinction of gaseous discharges in cavities in dielectricsProceedings of the IEE - Part A: Power Engineering, 1958
- Detection of Slot Discharges in High-Voltage Stator Windings During OperationTransactions of the American Institute of Electrical Engineers, 1951