A Fast Dielectric Response Measurement Instrument With Dynamic Power Supply Tracking and Active Suppression of Temperature Fluctuations

This paper proposes a fast frequency domain dielectric spectroscopy (FDS) test scheme for diagnosing oil-paper insulation. The high-voltage output section introduces dynamic power supply tracking (DPST) and cascading techniques to generate high-voltage excitation signals. The DPST can increase the a...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 70; no. 12; pp. 1 - 11
Main Authors Zhang, Daning, Xu, Lulin, Tian, Wenrui, Mu, Haibao, Yao, Huanmin, Zhao, Haoxiang, Tian, Jie, Zhang, Guan-Jun
Format Journal Article
LanguageEnglish
Published New York IEEE 01.12.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Actively suppressed temperature dependence
Bias
Circuits
dielectric response
Distortion
Distortion measurement
dynamic power supply tracking
Error analysis
Harmonic distortion
High voltages
Low frequencies
Low-pass filters
micro-current measurement
Power supplies
Power supply
Slew rate
Stability
Standard deviation
Temperature measurement
Testing
Tracking
Voltage
Waveforms
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Summary:This paper proposes a fast frequency domain dielectric spectroscopy (FDS) test scheme for diagnosing oil-paper insulation. The high-voltage output section introduces dynamic power supply tracking (DPST) and cascading techniques to generate high-voltage excitation signals. The DPST can increase the amplifier's voltage slew rate (SR) from 13 V per microsecond to 36.3 V per microsecond without crossover distortion. In the micro-current measurement section, the error active suppression structure of bias current and bias current under time-varying temperature conditions is proposed to improve the temperature stability of the measurement circuit. The fast testing technology shortens the test period by 65% in the low-frequency band by using the method of multi-frequency signal synthesis and partial cycle waveform fitting. The experimental results show that the total harmonic distortion and noise (THD+N) of the output voltage of the instrument are less than or equal to 0.078%. The voltage range is 780 Vpp. The standard deviation of current is less than 1.5%, and the standard deviation of tan δ is less than 1.7%, which verifies the stability of the designed instrument.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2023.3234148