Corona Location in Transformers by Radio Frequency Spectrum Analysis, Part I: Theory
- 1 September 1970
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Apparatus and Systems
- Vol. PAS-89 (7) , 1584-1590
- https://doi.org/10.1109/tpas.1970.292805
Abstract
After discussing transformer types, vα alues, and location of voltage generators in capacitive ladder networks and equivalent transmission lines, a new electrical technique for locating transformer partial discharges or corona is described. It is based on the measurement of the radio frequency spectra at the transformer terminals. Provided the transforner winding can be approximated to a uniform transmission line for the frequency range considered, the method is shown to be theoretically sound. Measurements on model networks and actual transformers suggest that, at least over certain frequency ranges, the winding can be regarded as a uniform transmission line. Apart from locating corona, the method provides a quick and accurate means of measuring actual transformer α values.Keywords
This publication has 8 references indexed in Scilit:
- A Study of the Initial Surge Distribution in Concentric Transformer WindingsIEEE Transactions on Power Apparatus and Systems, 1964
- Ultrasonic Detection and Location of Electric Discharges in Insulating Structures [includes discussion]Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1956
- The transient behaviour of ladder networks of the type representing transformer and machine windingsProceedings of the IEE - Part II: Power Engineering, 1954
- Fast Time Analysis of Intermittent Point-to-Plane Corona in Air I. The Positive Point Burst Pulse CoronaJournal of Applied Physics, 1954
- Analysis of Transient Voltages in NetworksTransactions of the American Institute of Electrical Engineers, 1940
- Performance of Traveling Waves in Coils and WindingsTransactions of the American Institute of Electrical Engineers, 1940
- Electric Oscillations and Surges in Subdivided WindingsJournal of Applied Physics, 1940
- Traveling waves Initiated by SwitchingTransactions of the American Institute of Electrical Engineers, 1939