Inverstigation of DC Leakage-current Waveform of Contaminated Insulators
نویسندگان
چکیده
منابع مشابه
Monitoring of Leakage Current for Composite Insulators and Electrical Devices
Electrical insulation is an important part of all electrical systems. The level of insulation safety provided by an insulator depends on the amount of leakage current flowing on its surface. Actually increased leakage current causes a part of high voltage to appear at dead end of insulator. This voltage may sometimes be of order of 1000 to 5000 Volts depending upon weather conditions. Such a le...
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Abstract: This paper descirbes leakage current characters and discharge phenomenon of outdoor insulators both in the lab and in the field. The results are hoped to be used for online monitoring of the contamination levels. The following contents are introduced in the paper: leakage current monitoring systems, relationships between leakage current and discharge phenomenon, flashover prediction m...
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This manuscript presents the experimental results of a new-clean and seven geothermal naturally polluted outdoor porcelain insulators. These insulators were tested in a hermetically sealed chamber, where their leakage currents and applied voltages were measured with a storage digital oscilloscope. The measured data could be recorded oscilloscope and transferred to a computer, saved in softcopy ...
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-Multilevel converters offer advantages in terms of the output waveform quality due to the increased number of levels used in the output voltage modulation. This advantage is particularly true for cascaded Hbridge converters that can be built to produce a large number of levels thanks to their modular structure. Nevertheless, this advantage comes at the cost of multiple DC-links supplied by ind...
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Flashover of polluted insulators in contaminated areas is one of the most important factors influencing the operation of transmission and distribution lines and finally line outages. Therefore, it is essential to prevent and detect flashover in the insulators. Hence, utilizing the insulator status monitoring systems and predicting their functions have absorbed a lot of attention over the recent...
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ژورنال
عنوان ژورنال: IEEJ Transactions on Power and Energy
سال: 2001
ISSN: 0385-4213,1348-8147
DOI: 10.1541/ieejpes1990.121.1_60