Multispectral Optical Partial Discharge Detection, Recognition, and Assessment

Partial discharge (PD) is treated as one of the major threats for gas insulated switchgear (GIS). By using the new generation multispectral detection sensor named as SiPM-based multispectral discharge sensor (SMDS), the time resolved partial discharge with multispectral information (named as MTRPD) for creeping discharge, suspension discharge and tip discharge, respectively. It indicates that the MTRPD for the specific discharge defect perform unique spectral fingerprints in discharge mode. Based on the graph characteristics of MTRPD, we introduced the convolution neural network (CNN) to implement PD type identification whose overall accuracy of Δqi-Δqi+1 and Δti-Δti+1 were 99.7% and 98.9%, respectively. This paper provides a new technique tool for fine diagnosis of PD independent of phase analysis.

Section: Test Facilitiesmentioning

confidence: 99%

Section: Test Facilitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adopting integration of multispectral time resolved analysis and graph-based deep learning method in partial discharge type identification

Xia

Ren

Wang

et al. 2022

“…Red means the light energy is attenuated to 100%~66% of the original, green means the light is attenuated to 66%~33% of the original, and blue means the light is attenuated to 30% of the original. As can be seen from the figure, when the light source is located in front of the guide rod, the light entering the sensor is divided into direct light [9] and reflected scattered light; when the light source is located on the guide rod and behind the guide rod, the light entering the sensor is both reflected light and scattered light. The reflected light and scattered light entering the sensor will undoubtedly bring some errors to the sensor.…”

Section: Simulation Processmentioning

confidence: 99%

Partial discharge location method in GIS coaxial bus structure based on multi-normal photoelectric array

Ren

Wang

et al. 2022

Self Cite

Partial discharge is an important reason for the failure of GIS equipment, and its detection can determine the type and position of the defect in GIS. In the discharge inspection, accurate positioning of defects can provide an important reference for maintenance. In response to this, this paper proposes a discharge optical location method based on multi-normal photoelectric array. Based on the SiPM sensor, a multi-normal array is designed and built into the coaxial structure of GIS equipment. Measuring the responses of each unit in the array to get the response ratio of each element and calculate the direction of the discharge light in space. This paper firstly introduces the array structure, and proposes a solution algorithm in space, which uses the proportional relationship of multi-normal elements to solve the discharge direction. Secondly, the feasibility and error source of this method are verified in the simulation software. Finally, the application effect of this method in actual power equipment is verified by actual measurement, and the results show that this method can accurately locate the partial discharge in GIS.

“…It is widely used in the field of partial discharge detection. The optical measurement methods used in the field include arc monitoring method [8], fluorescence fiber method [9] and ultraviolet pulse method [10]. However, arc detection cannot effectively detect discharge in the early stage of fault development, and its detection results are difficult to provide effective reference for maintenance and operation.…”

Section: Introductionmentioning

confidence: 99%

Optical arrangement method of lighting units in switchgear based on partial discharge luminosity distribution characteristics

Miao¹,

Wu²,

Liu³

et al. 2022

Partial discharge optical measurement has the characteristics of high sensitivity and strong anti-interference, but its detection effect is greatly affected by the deployment position of the sensor. Therefore, based on the radiation characteristics and transmission characteristics of optical signals, the deployment position of sensors in equipment is optimized. In this paper, an optimal layout scheme of switch cabinet lighting unit based on the distribution characteristics of partial discharge photometric is proposed. Firstly, the optical simulation model of switchgear cable room is designed, and the discharge light source is set at the typical fault location. According to the optical simulation results, the position sensor with high response intensity is selected for different discharge light sources. In order to prove the effectiveness of the layout scheme, the discharge optical detection experiment of switch cabinet was carried out. The results show that the sensor can detect discharge effectively in the selected installation position.