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Power Interference Suppression Method for Measuring Partial Discharges under Pulse Square Voltage Conditions

Author

Listed:
  • Linao Li

    (Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, School of Electrical and Electronics Engineering, Harbin University of Science and Technology, Harbin 150080, China)

  • Xinlao Wei

    (Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, School of Electrical and Electronics Engineering, Harbin University of Science and Technology, Harbin 150080, China)

Abstract

Partial discharge (PD) is an important metric for the insulation diagnosis of power equipment. However, its detection is affected by the strong electromagnetic interference generated by pulse square voltage. We therefore propose a power interference suppression method for partial discharges under pulse square voltage based on a quadratic measurement method. We conduct analysis of the topology circuit when partial discharge occurs in the insulation test sample and introduce the basic principle of the secondary measurement method according to the superposition principle and the linear relationship between the square voltages at different peak values. We verify the feasibility of this method by simulating a PD signal with power interference. Subsequently, we use the successive interception comparison method to solve the non-correspondence of the two initial measurement points problem and design and manufacture the transformer turn-to-turn oil-paper insulation test sample and experimental tank. By measuring the PD starting voltage of the insulation test sample under the power frequency voltage, we determined the first measurement voltage under the pulse square voltage and obtained the signal x 1 ( t ) to subsequently measure the PD signal x 2 ( t ). According to the proposed successive interception comparison method, the signal x 1 ( t ) is processed, and the secondary measurement method suppresses the power interference of the measured signal x 2 ( t ). We demonstrate that the proposed method effectively suppresses the power interference in PD detection under a pulse square voltage.

Suggested Citation

  • Linao Li & Xinlao Wei, 2022. "Power Interference Suppression Method for Measuring Partial Discharges under Pulse Square Voltage Conditions," Energies, MDPI, vol. 15(9), pages 1-15, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:9:p:3437-:d:811039
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    References listed on IDEAS

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    1. Amir Abbas Soltani & Ayman El-Hag, 2019. "Denoising of Radio Frequency Partial Discharge Signals Using Artificial Neural Network," Energies, MDPI, vol. 12(18), pages 1-14, September.
    2. Moein Borghei & Mona Ghassemi, 2020. "A Finite Element Analysis Model for Partial Discharges in Silicone Gel under a High Slew Rate, High-Frequency Square Wave Voltage in Low-Pressure Conditions," Energies, MDPI, vol. 13(9), pages 1-11, May.
    3. Mohammed A. Shams & Hussein I. Anis & Mohammed El-Shahat, 2021. "Denoising of Heavily Contaminated Partial Discharge Signals in High-Voltage Cables Using Maximal Overlap Discrete Wavelet Transform," Energies, MDPI, vol. 14(20), pages 1-22, October.
    4. Moein Borghei & Mona Ghassemi, 2019. "Partial Discharge Analysis under High-Frequency, Fast-Rise Square Wave Voltages in Silicone Gel: A Modeling Approach," Energies, MDPI, vol. 12(23), pages 1-13, November.
    5. Bing Luo & Jian Wang & Dong Dai & Lei Jia & Licheng Li & Tingting Wang, 2021. "Partial Discharge Simulation of Air Gap Defects in Oil-Paper Insulation Paperboard of Converter Transformer under Different Ratios of AC–DC Combined Voltage," Energies, MDPI, vol. 14(21), pages 1-13, October.
    6. Liangliang Wei & Yushun Liu & Dengfeng Cheng & Pengfei Li & Zhifeng Shi & Nan Huang & Hongtao Ai & Tianan Zhu, 2018. "A Novel Partial Discharge Ultra-High Frequency Signal De-Noising Method Based on a Single-Channel Blind Source Separation Algorithm," Energies, MDPI, vol. 11(3), pages 1-18, February.
    7. Kai Zhou & Mingzhi Li & Yuan Li & Min Xie & Yonglu Huang, 2019. "An Improved Denoising Method for Partial Discharge Signals Contaminated by White Noise Based on Adaptive Short-Time Singular Value Decomposition," Energies, MDPI, vol. 12(18), pages 1-16, September.
    8. Linao Li & Xinlao Wei, 2021. "Suppression Method of Partial Discharge Interferences Based on Singular Value Decomposition and Improved Empirical Mode Decomposition," Energies, MDPI, vol. 14(24), pages 1-22, December.
    9. Pawel Zukowski & Przemyslaw Rogalski & Konrad Kierczynski & Tomasz N. Koltunowicz, 2021. "Precise Measurements of the Temperature Influence on the Complex Permittivity of Power Transformers Moistened Paper-Oil Insulation," Energies, MDPI, vol. 14(18), pages 1-24, September.
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