State Grid Tianjin Electric Power Company

Electric Power Science & Research Institute of State Grid Tianjin Electric Power Company

Mingzheng Zhu

Chi Zhang

Jun Zhang

Wei Fan

Zhengzheng Meng

Xu Li

Ke Xu

Chun He

Longji Li

Fengzheng Zhou

Lei Yang

Xiaohui Zhu

Qinghua Tang

Haoming Wang

Pengxian Song

Shengchen Fang

Yang Yu

Nan Wang

Cheng Sun

Defect detection method for a semi-conducting bedding layer of a power cable includes: obtaining a length parameter, a corrugation pitch parameter, radius parameters, and a thickness parameter of a power cable; obtaining a first resistance value between a shield and a corrugated sheath, and calculating a second resistance value of the shield based on the length parameter and the corrugation pitch parameter; calculating a radial resistance value of the semi-conducting bedding layer based on the first resistance value and the second resistance value; determining a contact angle of a critical point of contact between the corrugated sheath and the semi-conducting bedding layer based on the radius parameters and the thickness parameter; calculating volume resistivity of the semi-conducting bedding layer based on the radial resistance value and the contact angle; and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the semi-conducting bedding layer.

Defect detection method, apparatus, and device for semi-conducting bedding layer of power cable

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Tianjin, China

Mingzheng Zhu