Related Experiment Video
Updated: Dec 2, 2025
16:11
Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
9.6K
Online quantitative partial discharge monitor based on interferometry
Liang Xue1, Yueyue Zhu2, Chuankai Yang3
1College of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China. xueliangokay@gmail.com.
Scientific Reports
|November 5, 2020
Summary
This study introduces an interferometry-based monitor for sensitive online detection of partial discharge (PD). The system quantifies PD occurrence and assesses damage, offering a cost-effective solution for electrical insulation monitoring.
Area of Science:
- Electrical Engineering
- Optical Physics
- Materials Science
Background:
- Partial discharge (PD) is a critical indicator of insulation degradation in high-voltage equipment.
- Existing PD monitoring methods often require signal amplification or are not cost-effective for real-time field applications.
- Accurate, real-time assessment of PD and its associated inception voltage is crucial for predictive maintenance.
Purpose of the Study:
- To develop and validate an interferometry-based online monitoring system for sensitive and quantitative detection of partial discharge (PD).
- To evaluate the system's capability in assessing the peak value of discharge inception voltage (DIV) with random waveforms and estimating PD damage extent.
- To demonstrate a cost-effective and convenient alternative to conventional PD monitoring techniques.
Main Methods:
- Collecting interferograms online, capturing light signals emitted by PD events.
- Extracting phase information from interference fringes to quantitatively retrieve DIV peak values.
- Utilizing theoretical analysis and experimental validation with an artificial PD source.
Main Results:
- The interferometry-based monitor sensitively detects PD occurrence and quantifies its characteristics.
- Real-time retrieval of the peak discharge inception voltage with random waveforms is achieved.
- The method avoids the need for light signal amplification, simplifying practical implementation.
- Experimental results validate the theoretical analysis and demonstrate the system's effectiveness.
Conclusions:
- The proposed interferometry-based method offers a sensitive, quantitative, and cost-effective online PD monitoring solution.
- The system's ability to assess DIV and damage extent, coupled with its convenient implementation, highlights its strong potential for field applications.
- This approach represents a significant advancement in monitoring the health of electrical insulation systems.
