Optical sensors for power transformer monitoring: A review

Guoming Ma, Yuan Wang, Weiqi Qin, Hongyang Zhou, Chao Yan, Jun Jiang, Yiguang Ju

Research output: Contribution to journalReview articlepeer-review

65 Scopus citations


Power transformers play a vital role in power transmission systems from the energy source to the consumption center. In situ diagnostics of the performance of power transformers provides a variety of benefits to ensure reliable electricity transmission. Immunity to electromagnetic interference, high sensitivity, high insulation as well as small dimensions of optical sensing make it very attractive for applications in power transformer monitoring. This paper presents a critical review of various diagnostic methods for power transformers such as partial discharge, dissolved gases, temperature and other important sensing, and optical detection. The advantages and disadvantages of different monitoring methods are carefully discussed and assessed. Finally, the existing technical barriers and future prospects of optical monitoring methods for power transformers are presented.

Original languageEnglish (US)
Pages (from-to)367-386
Number of pages20
JournalHigh Voltage
Issue number3
StatePublished - Jun 2021

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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