Feasibility of Optical Fibre Sensors for Moisture Diagnosis in Transformer Insulation

Ansari, Muhammad A.; Martín, D.

doi:10.1109/cmd.2018.8535766

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…Polyimide reacts with water and expands, similar to palladium film with hydrogen and, therefore, PI coated FBG sensors can be used for moisture detection. In [81], a PI coated FBG sensor was placed in a litre of dried mineral oil while demineralised water was pipetted and stirred in. The Bragg wavelength shift was linearly related to the water activity calculated using a moisture probe.…”

Section: Moisturementioning

confidence: 99%

Fibre Bragg Grating Sensors for Condition Monitoring of High-Voltage Assets: A Review

Ramnarine,

Peesapati,

Djurović

2023

Energies

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The high-voltage (HV) assets in the existing power transmission network will experience increased electrical, thermal, environmental and mechanical stresses and, therefore, robust condition monitoring is critical for power system reliability planning. Fibre Bragg grating (FBG) sensors offer a promising technology in HV applications due to their immunity to electromagnetic interference and multiplexing capability. This paper reviews the current technology readiness levels of FBG sensors for condition monitoring of transformers, transmission lines, towers, overhead insulators and power cables, with the aim of stimulating further development and deployment of fibre-based HV asset management systems. Currently, there are several reported cases of FBG sensors used for condition monitoring of HV assets in the field, proving their feasibility for long-term use in the power grid. The review shows that FBG technology is versatile and can facilitate multi-parameter measurements, which will standardise the demodulation equipment and reduce challenges with integrating different sensing technologies.

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Section: Moisturementioning

confidence: 99%

Fibre Bragg Grating Sensors for Condition Monitoring of High-Voltage Assets: A Review

Ramnarine,

Peesapati,

Djurović

2023

Energies

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“…M. Ansari et al [131,132] performed an investigation to measure water content in transformer insulation by coating a moisture sensitive polyimide layer on FBG. Sensor response was calibrated and compared to a commercial capacitive moisture measurement instrument, and it was found that the sensor could detect moisture as low as 1% relative humidity.…”

Section: Moisturementioning

confidence: 99%

Optical sensors for power transformer monitoring: A review

et al. 2020

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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.

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“…The first method is based on FBG techniques. An FBG sensor fibre is coated with one of the polyimides that absorbs moisture and exerts a strain on the FBG sensor, which changes its Bragg wavelength [19,77]. Based on the Bragg wavelength shift, the moisture can be estimated.…”

Section: Optical Sensorsmentioning

confidence: 99%