Solid Insulation Partial Discharge Detection of Low-Intensity Noise Fiber Laser Based on Polarized Light Demodulation

Zhenpeng Zhang (), Zhengbo Liang, Junping Hou, Li Chen, Lin Tang and Mingzhong Xu
Additional contact information
Zhenpeng Zhang: China Electric Power Research Institute, Wuhan 430074, China
Zhengbo Liang: China Electric Power Research Institute, Wuhan 430074, China
Junping Hou: China Electric Power Research Institute, Wuhan 430074, China
Li Chen: China Electric Power Research Institute, Wuhan 430074, China
Lin Tang: China Electric Power Research Institute, Wuhan 430074, China
Mingzhong Xu: China Electric Power Research Institute, Wuhan 430074, China

Energies, 2025, vol. 18, issue 4, 1-14

Abstract: The distributed feedback fiber (DFB) laser has been extensively researched for the purpose of detecting partial discharges in power equipment. DFB is demodulated using an unbalanced interferometer, which is not only structurally complex but also prone to introducing significant noise when the fiber distance is long. In order to address this issue, this paper presents the design of a low-noise demodulation system. The theoretical model of external optical feedback noise is described in this study. The relationship between this noise and the DFB linewidth is established by introducing the external optical feedback coefficient C. The theoretical results demonstrate that the system noise is minimized when C is approximately 30. A low-noise partial discharge detection system combined with a polarization optical demodulation method is developed. The experimental results confirmed the local discharge detection capability of the system in solid insulation and significantly reduced the system noise. This result promotes wider application and promotion of DFB lasers.

Keywords: partial discharge detection; distributed feedback fiber laser; noise suppression (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/4/955/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/4/955/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:4:p:955-:d:1592945

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().