Fiber optic interferometric sensor for acoustic detection of partial discharges

Macia-Sanahuja, C.; Lamela, Horacio; García-Souto, José A.

doi:10.1364/jot.74.000122

Cited by 31 publications

(15 citation statements)

References 0 publications

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“…Therefore, it is preferable to detect the phase change of light to calibrate its sensitivity [4]. Based on the demodulation system of the Michelson interferometer-based fiber sensor shown in Figure 2, the characterization of frequency response and sensitivity is conducted in the laboratory environment as shown in Figure 3.…”

Section: Characterization Of Michelson Interferometer-based Fiber mentioning

confidence: 99%

“…The phase shift per unit length and unit pressure of this sensor is calculated to be 1.7

rad / (normalm \cdot Pa) (= 0.47 rad / 1.5 normalm / 0.18 Pa)

at a 20 kHz measurement frequency, which can be regarded as the sensitivity of the sensor [27]. Therefore, the fiber optic sensor head has a sensitivity of 1.7

rad / (normalm \cdot Pa)

, which is relatively higher than the sensitivity of the sensors shown in a previous report of 40

sans-serifμ rad / (normalm \cdot Pa)

[4]. If the sensitivity is calculated in terms of mV, because the peak-peak value of 0.045 V corresponds to a phase change of 0.47 rad, we can convert the value of 1.7

rad / (normalm \cdot Pa)

to 163

mV / (normalm \cdot Pa)

.…”

Section: Characterization Of Michelson Interferometer-based Fiber mentioning

confidence: 99%

“…As the performance of insulating layer degrades, the intensity of PD will increase quickly; compared with the early stage PD, the destruction of PD will be more significant. The high-voltage cable accessories will slowly break down due to PD and eventually lead to paralysis of the power supply system [4,5]. Therefore, the accurate and reliable detection of PD can determine the power system's operating condition by the use of in-situ monitoring.…”

Section: Introductionmentioning

confidence: 99%

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A Fiber-Optic Sensor for Acoustic Emission Detection in a High Voltage Cable System

Zhang

Pang

Liu

et al. 2016

Sensors

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We have proposed and demonstrated a Michelson interferometer-based fiber sensor for detecting acoustic emission generated from the partial discharge (PD) of the accessories of a high-voltage cable system. The developed sensor head is integrated with a compact and relatively high sensitivity cylindrical elastomer. Such a sensor has a broadband frequency response and a relatively high sensitivity in a harsh environment under a high-voltage electric field. The design and fabrication of the sensor head integrated with the cylindrical elastomer is described, and a series of experiments was conducted to evaluate the sensing performance. The experimental results demonstrate that the sensitivity of our developed sensor for acoustic detection of partial discharges is 1.7 rad/(normalm⋅Pa). A high frequency response up to 150 kHz is achieved. Moreover, the relatively high sensitivity for the detection of PD is verified in both the laboratory environment and gas insulated switchgear. The obtained results show the great potential application of a Michelson interferometer-based fiber sensor integrated with a cylindrical elastomer for in-situ monitoring high-voltage cable accessories for safety work.

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Section: Characterization Of Michelson Interferometer-based Fiber mentioning

confidence: 99%

“…The phase shift per unit length and unit pressure of this sensor is calculated to be 1.7

rad / (normalm \cdot Pa) (= 0.47 rad / 1.5 normalm / 0.18 Pa)

at a 20 kHz measurement frequency, which can be regarded as the sensitivity of the sensor [27]. Therefore, the fiber optic sensor head has a sensitivity of 1.7

rad / (normalm \cdot Pa)

, which is relatively higher than the sensitivity of the sensors shown in a previous report of 40

sans-serifμ rad / (normalm \cdot Pa)

[4]. If the sensitivity is calculated in terms of mV, because the peak-peak value of 0.045 V corresponds to a phase change of 0.47 rad, we can convert the value of 1.7

rad / (normalm \cdot Pa)

to 163

mV / (normalm \cdot Pa)

.…”

Section: Characterization Of Michelson Interferometer-based Fiber mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Fiber-Optic Sensor for Acoustic Emission Detection in a High Voltage Cable System

Zhang

Pang

Liu

et al. 2016

Sensors

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“…The bandwidth of the transient reading record is normally 3 GHz, and no additional amplification is required as the quality of the output from the pre-amplifier is good. The UHF technique is increasingly used to test power transformers and has the sensitivity better than AE [33]. Figure 10 is a typical UHF monitoring system setup.…”

Section: Uhf Pd Detection In the Transformermentioning

confidence: 99%

“…The light source from the sensor coil will then be converted to the electrical signal which is then amplified before being observed (eg. using a digital oscilloscope) [33]. Reference Fig.…”

Section: Optical Detection Of Pd In the Transformer Using Mach-zehndementioning

confidence: 99%

Review on partial discharge detection techniques related to high voltage power equipment using different sensors

et al. 2014

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When operating an equipment or a power system at the high voltage, problems associated with partial discharge (PD) can be tracked down to electromagnetic emission, acoustic emission or chemical reactions such as the formation of ozone and nitrous oxide gases. The high voltage equipment and high voltage installation owners have come to terms with the need for conditions monitoring the process of PD in the equipments such as power transformers, gas insulated substations (GIS), and cable installations. This paper reviews the available PD detection methods (involving high voltage equipment) such as electrical detection, chemical detection, acoustic detection, and optical detection. Advantages and disadvantages of each method have been explored and compared. The review suggests that optical detection techniques provide many advantages in the consideration of accuracy and suitability for the applications when compared to other techniques.

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