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

State Grid Tianjin Electric Power Company

State Grid Corporation of China

Chi Zhang

Wei Fan

Chun He

Longji Li

Songyuan Li

Qinghua Tang

Zhengzheng Meng

Lei Yang

Lin Li

Haoming Wang

Pengxian Song

Minghui Duan

Rong Chen

Jin He

Shengchen Fang

Yang Yu

Xiaoguang Wang

Jun Zhang

Li Zhang

Xu Li

Ke Xu

Xiaohui Zhu

Fengzheng Zhou

Nan Wang

Kun Wang

Guohao Li

Jian Wang

Qi Zhao

Cheng Sun

Yuyan Man

Mingzheng Zhu

Jin Li

He Zhang

Chunhui Zhang

Xiaoguang Xi

Fei Lu

Weibo Li

Liansheng Zhou

Xuliang Zhu

Zhiyong Gan

Suya Li

Meng Cao

Bin Qu

Yue Han

Qingfeng Wen

Xiaobo Song

Yanwei Dong

Chuang Yao

Junji Feng

Yongfu Wang

Jufang Wei

Ziyue Wang

Liqing Liu

The present disclosure provides a defect detection method and apparatus for a cushion layer of a cable, a device, and a storage medium. The method includes: obtaining specification parameters of a corrugated sheath of a to-be-detected cable, calculating a first volume of a cushion layer without deformation and a second volume of a deformed portion of the cushion layer when the cushion layer is deformed under stress, and calculating a stressed-state deformation ratio of the cushion layer based on the first volume and the second volume; obtaining a voltage, a current, an electrode area, an electrode distance, and an initial electrode distance of the cushion layer when the stressed-state deformation ratio is reached, and calculating volume resistivity of the cushion layer; and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the cushion layer.

Defect detection method and apparatus for cushion layer of cable, device, and storage medium

A GIS mechanical fault diagnosis method and the device are disclosed. The method includes: collecting vibration signals to be measured of various excitation sources of GIS in mechanical operation; performing wavelet packet-feature entropy vector extraction on the vibration signals to be measured, when it is determined that the vibration signals to be measured are abnormal according to standard vibration signals in the normal state; inputting the extracted wavelet packet-feature entropy vectors into the pre-trained BP neural network for GIS mechanical fault identification, and outputting the corresponding fault. The disclosure integrates the vibration signals under the action of various excitation sources, extracts the feature entropy vectors according to the entropy theory, and constructs and trains a BP neural network that can classify and recognize various GIS mechanical faults, so as to perform comprehensive and effective GIS mechanical faults diagnose.

GIS mechanical fault diagnosis method and device

An internal inspection robot includes a housing, a gravity balancing apparatus, a power apparatus, and multiple sensor apparatuses. The housing is configured to be a sealed structure including a first housing, a second housing, a third housing, a fourth housing, a fifth housing, and a sixth housing. The gravity balancing apparatus is disposed inside the housing and configured to control the pose of the internal inspection robot. The power apparatus and the multiple sensor apparatuses are disposed on the surface of the housing. The power apparatus is configured to receive a motion control signal from a control terminal to drive the internal inspection robot to move. The multiple sensor apparatuses are configured to provide a sensing signal to the control terminal.

Internal inspection robot

Provided are an imaging method and system for residual stress of a basin insulator and a method for preparing a test block. The imaging method includes cutting and preparing a standard industrial sample of a basin insulator and testing the acoustoelastic coefficient of the standard industrial sample; then obtaining the residual stress data of the basin insulator and obtaining the spatial point sound velocity distribution of the basin insulator; finally, obtaining a stress distribution cloud map of the basin insulator by calculation of the attribute value and the coordinate data of a to-be-measured location, and performing reliability verification based on the residual stress data.

Imaging method and system for residual stress of basin insulator, and method for preparing test block

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

Provided is a method for determining types of ice-and-snow cover. The method includes: determining typical RGB component values of typical types of ice-and-snow cover, establishing a one-to-one corresponding relation between the typical types of ice-and-snow cover and the typical RGB component values, and establishing a database of typical types of ice-and-snow cover; and extracting RGB values of an ice-and-snow covering point from an ice-and-snow cover image of a measurement area, comparing RGB component values of the ice-and-snow covering point with typical RGB component values in the database of typical types of ice-and-snow cover, and determining the type of ice-and-snow cover of the measurement area according to a comparison result.

Method and device for determining types of ice-and-snow cover

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Tianjin, China

Chi Zhang