| 摘要 |
The present invention discloses a method and apparatus ( 5 ) for condition diagnosing of an inductive power device ( 1 ), such as a transformer or reactor, having power windings ( 2 ) immersed in a fluid ( 3 ) being cooled by cooling devices ( 4 ). The diagnosing method basically compares and evaluates expected heat flows into and out from the inductive power device ( 1 ) system together with an actual and a previous heat content of such a system. From the heat flows the heat balance in the system may be obtained and is used for diagnosing the operation conditions of the inductive power device ( 1 ). The results from the condition diagnosing may be used as indicators ( 70 ) that can alarm operators, may be sent as a data signal ( 80 ) to remote and/or portable display means ( 85 ), such as a computer, or may be used as input data to control or simulation systems.
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