Noise measurement method for large transformers
نویسندگان
چکیده
منابع مشابه
A method for testing current transformers
Several precise laboratory methods are now available for the determination of the ratio and phase angle of current transformers. 1 These, however, all require a considerable amount of special apparatus, such as carefully calibrated noninductive shunts and very sensitive alternating-current detectors, and are therefore not suited for use under shop or central-station conditions. The task of comp...
متن کاملDirect Measurement of Noise Levels in a Large Hospital
Previous studies on the question of noise in hospitals have been based on the replies of patients to questionnaires. This paper records what is to our knowledge the first attempt to determine sound levels in a hospital by direct measurement; the work was carried out in the Bristol Royal Infirmary. Some justification is needed for the use of objective sound measurement. Admittedly the intensity ...
متن کاملMultiple SVMs Modelling Method for Fault Diagnosis of Power Transformers
For enhancing the accuracy of fault diagnosis for power transformers, a multiple SVMs scheme is proposed in this paper. In this scheme, SVM is used to establish the base classifier for its good performance and fast learning speed. Secondly, the several base classifiers based on single SVM will be combined by consulting ensemble techniques. And then a multiple SVM s method is obtained. The real ...
متن کاملAn Exact Synthesis Method for Dual-band Chebyshev Impedance Transformers
We propose an exact synthesis method which allows the design of dual-band transformers with an arbitrary even number of uniform sections giving equi-ripple impedance matching in two separate bands centered at two arbitrary frequencies. This method is a generalization of the exact Collin-Riblet synthesis of Chebyshev single-band transformers. As compared to a single-band Collin-Riblet transforme...
متن کاملA Dynamic Integrated Fault Diagnosis Method for Power Transformers
In order to diagnose transformer fault efficiently and accurately, a dynamic integrated fault diagnosis method based on Bayesian network is proposed in this paper. First, an integrated fault diagnosis model is established based on the causal relationship among abnormal working conditions, failure modes, and failure symptoms of transformers, aimed at obtaining the most possible failure mode. And...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1974
ISSN: 0001-4966
DOI: 10.1121/1.1913841