Acoustic diagnosis of gas insulated substations: a theoretical and experimental basis

Lundgaard, L.E.; Runde, M.; Skyberg, B.

doi:10.1109/61.103670

Cited by 88 publications

(16 citation statements)

References 7 publications

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“…The acoustic detection method is a diagnostic technique which can be applied from outside the equipment. The acoustic method enables detection with high sensitivity of minute vibrations of the GIS tank wall produced by PD generation or free metallic particles colliding with the tank wall [3,4]. On the other hand, there are some disadvantages to the acoustic method: it is difficult to understand and analyze the waveform of the acoustic signal due to reflection, interference, attenuation, and velocity dispersion of the propagating acoustic waves.…”

Section: Introductionmentioning

confidence: 99%

Time–frequency analysis of lamb waves caused by partial discharges and free particles in GIS

Kozako

Ohtsuka

Matsuhisa³

et al. 2003

Electrical Engineering Japan

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SUMMARYWe investigated the propagation properties of Lamb waves in a GIS tank, using time-frequency analysis to diagnose the insulation performance of GIS. We measured the acoustic signals excited by metallic particles colliding with the tank sheath, and those emitted by partial discharge in the GIS. The wavelet transform was used to decompose the wave data into its time-frequency components. As a result, it was confirmed that Lamb waves with the dispersive property of the velocity are excited and propagate in a spiral path along the tank wall due to the cylindrical structure of the tank. Taking these results into consideration, we propose a new technique for identification of defect locations in GIS based on time-frequency analysis of acoustic signals with the wavelet transform.

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Section: Introductionmentioning

confidence: 99%

Time–frequency analysis of lamb waves caused by partial discharges and free particles in GIS

Kozako

Ohtsuka

Matsuhisa³

et al. 2003

Electrical Engineering Japan

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“…It is widely accepted that the acoustic method is more sensitive to particle movements inside the GIL/GIS than other PD measurement methods because of the collision between particles and the enclosure, which generates a sound wave. A lot of works are concentrated on the acoustic detection of defects in GIS, such as investigation of theoretical and experimental basis [51], gathering field experiences, development of expert systems [52], and particle characterization in GIS from acoustic signals [53]. Some of these works focus on the applications of neural networks and genetic algorithms in the acoustic diagnosis of GIS [54].…”

Section: Application Of Aet In Gismentioning

confidence: 99%

Applications of the Acoustic Method in Partial Discharge Measurement: A Review

Ilkhechi

Samimi

2021

IEEE Trans. Dielect. Electr. Insul.

105

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This paper reviews the main features of acoustic emission technique. First, the characteristics of acoustic signals and their physics are addressed. Then, the structure of acoustic sensors employed for capturing signals is studied. In the next step, the acoustic method of PD measurement is compared with the standard electrical method. Afterward, the applications of AET in PD measurement in different equipment are summarized. All acoustic method and combined acoustic-electrical method for PD localization in transformers are discussed. Moreover, the applications of AET in the monitoring of GIS systems are explained, along with the acoustic behaviors of moving particles in these systems. Finally, the general considerations in the signal processing of the acoustic signals are reviewed.

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“…Gas-insulated switchgear (GIS) is an assembly apparatus, which consists of a variety of static and drive mechanisms such as circuit breaker (CB), busbar, current and voltage transformer, lightning arrester etc., and has gained great popularity in electric power production and distribution systems [1,2]. According to the statistics made by State Grid Corporation of China, the mechanical failure of GIS in which the voltage level was >126 kV occupies the largest proportion of all failures, reaching 39.3%, and the failure mainly concentrates on CB and basin insulator [3,4].…”

Section: Introductionmentioning

confidence: 99%

GIS mechanical state identification and defect diagnosis technology based on self‐excited vibration of assembled circuit breaker

Liu

et al. 2020

IET Science, Measurement & Technology

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Acoustic diagnosis of gas insulated substations: a theoretical and experimental basis

Cited by 88 publications

References 7 publications

Time–frequency analysis of lamb waves caused by partial discharges and free particles in GIS

Time–frequency analysis of lamb waves caused by partial discharges and free particles in GIS

Applications of the Acoustic Method in Partial Discharge Measurement: A Review

GIS mechanical state identification and defect diagnosis technology based on self‐excited vibration of assembled circuit breaker

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