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- W2187183837 abstract "The aim of this paper is to present an antenna-based sensors which have been designed numerical analysed and built for partial discharge (PD) detection. PD is characterized by the electromagnetic wave radiation in ultra high frequency (UHF) band. The sensors have been designed to meet the frequency requirements for PD detection and the frequency dependence of SWR is presented for three types of sensor. For the experimental verification of localization method a model setup has been built. The model setup is equipped with antenna sensors, RF amplifiers and data acquisition unit. The model setup is described in the paper as a following step of the research. The result of the measurement which has been performed up to the present are presented also. In HV and VHV transformers the dielectric is mineral or synthetic oil. Due to the increase in PD activity in transformer oil free atoms of carbon, hydrogen and oxygen develop from hydrocarbons, and there also generates a certain percentage of water and other organic compounds. All of these elements decrease the quality of the dielectric. In addition to that, rapid increase in pulse activity may cause the formation of a hazardous explosive compound of oxygen and hydrogen. Then, this situation may result in explosion and damage to the device. In order to prevent the transformer failure the observation of pulse activity is necessary. The occurrence of discharge with substantial charge transport level can be localized in critical areas of the transformers. Having a possibility to localize the increased discharge activity in some of the critical areas allows us to undertake precautions in order to avoid the critical transformer failure. The discharge activity localization can be determined on the basis of processing of signals from suitable installed sensors. The evaluation of the discharge location utilizes the model of wave propagation inside the transformer, which has been presented in early work Fiala P., Drexler P., Jirku T.,2010." @default.
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- W2187183837 date "2012-01-01" @default.
- W2187183837 modified "2023-09-24" @default.
- W2187183837 title "NUMERICAL MODELING, SENSORS AND EXPERIMENTAL MODEL DEVELOPMENT FOR PARTIAL DISCHARGE LOCALIZATION IN HIGH VOLTAGE TRANSFORMERS" @default.
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