Design of Triggering Device for VFTO Measurement System

Gong Chang Yue; Yu Rong Jia; Jia Xi He; Wei Dong Liu

doi:10.4028/www.scientific.net/AMR.516-517.1759

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 516-517Design of Triggering Device for VFTO Measurement...

Design of Triggering Device for VFTO Measurement System

Abstract:

Very fast transient overvoltage (VFTO) can be generated during the operation of disconnect switch (DS). Especially in ultra high voltage (UHV) gas insulated substation (GIS), VFTO is a threat to the safety of the power system equipment. It is very important to measure VFTO waveforms accurately. VFTO waveforms are comprised of high frequency voltage superimposed on the power frequency voltage in source side of DS and high frequency voltage superimposed on step-wise voltage in load side. How to trigger oscilloscope to acquire data is a big problem in measuring process. According to the features of VFTO waveforms, new triggering device consisting of a high pass filter is designed. The output of measurement sensor is used as the input of the high pass filter, and the output of the high pass filter is used to trigger oscilloscope. When the DS is not operated, there are no signals output from the high pass filter and the oscilloscope is waiting for trigger. After the operation of DS, the high frequency signals will pass the filter to trigger oscilloscope to acquire data. The device can guarantee the oscilloscope to complete a data acquisition properly.

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Periodical:

Advanced Materials Research (Volumes 516-517)

Pages:

1759-1764

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.516-517.1759

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Online since:

May 2012

Authors:

Gong Chang Yue, Yu Rong Jia, Jia Xi He, Wei Dong Liu

Keywords:

High-Pass Filter, Triggering Equipment, UHV GIS, VFTO Measurement System

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