10  kV Combined Test Circuit Design with Impulse and Power Frequency Continuous Current

doi:10.3969/j.issn.1000-7229.2015.08.017

Abstract

Abstract:

To test the capability of 10 kV lightning protection device with series gaps to cut off the power frequency continuous current after the device breakdown by lightning, this paper designed a test loop in combination with impulse test and power frequency continuous current test. In order to generate power frequency continuous current with high amplitude under higher voltage, a LC series and parallel resonant circuit was used in which the parameters of each element were calculated and selected and their reasonable values were given. Finally, a synchronization control circuit was chosen to extract the impulse signal to conduct the power frequency continuous current circuit, which could realize the synchronization in impulse test and power frequency continuous current test. The calculation results show that the combined test circuit can generate 1.2/50 μs impulse waveform, and 50 Hz sinusoidal current wave with 100 ms oscillation, which can meet the requirement of testing the capability of lightning protection device with series gaps to cut off electric arc under power frequency continuous current after the device breakdown by lightning.

Key words: lightning protection device with series gaps, LC series and parallel resonant, power frequency continuous current, combined test, synchronization control

CLC Number:

TM 862

CHEN Sixiang, SU Xingzhi, KONG Huadong,SUN Guanghui, LIU Yijun, QI Xiaojun. 10 kV Combined Test Circuit Design with Impulse and Power Frequency Continuous Current[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(8): 102-107.

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10 kV Combined Test Circuit Design with Impulse and Power Frequency Continuous Current

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