scholarly journals Research on Pressure-based Detection Technology for Partial Overheat Insulation Defect of Oil-less Power Equipment

2021 ◽  
Vol 632 ◽  
pp. 042009
Author(s):  
Qunying Yu ◽  
He Liu ◽  
Qiuyue He ◽  
Guozhi Zhang ◽  
Zheliang Zhang ◽  
...  
Keyword(s):  
Power Equipment ◽  
Detection Technology ◽  
Insulation Defect

scholarly journals Research on main insulation defect of cable fusion joint based on IDIP-DR detection technology

2021 ◽  
Vol 2121 (1) ◽  
pp. 012026
Author(s):  
Sanwe Liu ◽  
Fuyong Huang ◽  
Chao Qiu ◽  
Xiaoli Duan ◽  
Chaowen Fang ◽  
...  
Keyword(s):  
Process Control ◽  
High Voltage ◽  
Weak Link ◽  
Effective Means ◽  
Effective Control ◽  
Construction Technology ◽  
Detection Technology ◽  
Insulation Defect ◽  
Testing Technology ◽  
Huge Impact

Abstract The cable connector is the weak link of the electrical part of the cable. Most of the cable breakdown accidents occur at the connector, which will have a huge impact on the safe power supply of the city. In recent years, with the development and maturity of 10 kv cable fusion joint technology, high-voltage cable fusion joint technology is gradually applied in the field, but the key process problems in the production process lack of effective control means. In order to solve such problems, this paper use IDIP - DR digital radiographic testing technology. The key technology of high voltage cable melting joint detection, effectively detect the main insulation problems bubble construction technology. Through the anatomical, proved the accuracy of the test results, for the subsequent company to carry out the weld joint process control provides an effective means of. The causes of defects were analyzed and the corresponding process control suggestions were put forward.

Research on insulation defect localization technology of power equipment

2021 ◽  
Author(s):  
Guanjun Zhang ◽  
Xiaochang Hua ◽  
Haotian Zhang ◽  
Dingge Chang ◽  
Haibao Mu
Keyword(s):  
Power Equipment ◽  
Insulation Defect ◽  
Defect Localization

scholarly journals Diagnosis and Classification Decision Analysis of Overheating Defects of Substation Equipment Based on Infrared Detection Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Zhigang Shi ◽  
Yunlong Zhao ◽  
Zhanshuang Liu ◽  
Yanan Zhang ◽  
Le Ma
Keyword(s):  
Recognition Accuracy ◽  
Infrared Image ◽  
Normal Operation ◽  
Power Equipment ◽  
Relative Temperature ◽  
Thermal Failure ◽  
Detection Technology ◽  
Diagnosis And Classification ◽  
Substation Equipment ◽  
Infrared Diagnosis

Substation equipment is not only the main part of the power grid but also the essential part to ensure the development of the national economy and People's Daily life of one of the important infrastructure. How to ensure its normal operation and find the sudden failure has become a hot issue to be solved urgently. For thermal fault diagnosis needs to classify and identify different power equipment first, this paper designed an SVM infrared image classifier, which can effectively identify three types of common power equipment. The classifier extracts HOG features from the infrared images of power equipment processed by the above segmentation and combines them with SVM multiclassification to achieve the purpose of improving the recognition accuracy. The experiment uses the classifier to identify three kinds of equipment, and the results show that the comprehensive recognition accuracy of the classifier is more than 95.3%, which is better than the traditional classification method and meets the demand for classification accuracy. In this paper, the traditional method of relative temperature difference is improved by using the temperature data of the infrared image, which can automatically judge the thermal failure level of electric power equipment. Experiments show that the diagnosis system designed in this paper can classify faults and give treatment suggestions while judging whether there are thermal faults for three types of power equipment, which verifies the feasibility and effectiveness of the substation infrared diagnosis technology designed in this paper.

Summary of Study on the GIS Partial Discharge Detection Technology and SF6 Alternative Gas

2013 ◽  
Vol 718-720 ◽  
pp. 611-616
Author(s):  
Yun Peng Liu ◽  
Zi Jian Wang ◽  
Yan Song Li
Keyword(s):  
Electromagnetic Waves ◽  
Partial Discharge ◽  
Detection Methods ◽  
Detection Technology ◽  
Foreign Countries ◽  
Insulation Defect ◽  
Long Time ◽  
Important Position ◽  
Physical Phenomena ◽  
Discharge Detection

Gas insulated switchgears occupy an important position in the power system. But the partial discharge would occur because of insulation defect, PD will lead to the GIS insulation damage after a long time, and will lead to serious consequences without treatment in time, therefore, the PD detection is particularly important. PD is detected by its secondary physical phenomena, including the phenomena of sound, light, electromagnetic waves and gas decomposition products and so on. At present, many scholars in China and foreign countries have done a comprehensive study on insulation detection technology of GIS and have achieved a large number of results. The author do a detailed overview on the detection technical of GIS insulation state, including GIS platform and the simulation of typical insulation defectspartial discharge detection methods, SF6 alternative gas and pattern recognition. These works provide a valuable reference for follow-up study of GIS.

scholarly journals Temperature detection technology of power equipment based on Fiber Bragg Grating

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 663-667
Author(s):  
Xin Zhang ◽  
Zui Tao ◽  
Li Yang
Keyword(s):  
High Reliability ◽  
Signal Transmission ◽  
Electrical Power ◽  
System Control ◽  
Alarm System ◽  
Power Equipment ◽  
Single Cycle ◽  
Detection Technology ◽  
Temperature Detection ◽  
Fabry Perot

Abstract The temperature detection and alarm system of power equipment is supposed to be used in power accidents caused by overheating. In our experiment, we build a system to detect the temperature of electrical power equipment. According to the actual temperature fitting curve, the whole system uses the Fiber Bragg Gratings as the signal sensing and transmission media, using the tunable Fabry-Perot (FP) cavity filter to demodulate the fiber and a SLED light source which is considered high reliability. System control and signal processing is carried out by the STM32F407ZGT6 microcontroller and its internal single-cycle DSP. The system has the characteristics of strong anti-interference ability, high reliability and precision, simple installation, convenient maintenance, remote signal transmission.

On-line image readout in CTEM

1994 ◽  
Vol 52 ◽  
pp. 400-401
Author(s):  
K.-H. Herrmann ◽  
W. D. Rau ◽  
R. Sikeler
Keyword(s):  
Primary Electron ◽  
Digital Information ◽  
Electron Hole ◽  
Detection Technology ◽  
Long Time ◽  
On Line ◽  
Electron Image ◽  
Optical Transfer ◽  
Detection Quantum Efficiency ◽  
Technical Solutions

Quantitative recording of electron patterns and their rapid conversion into digital information is an outstanding goal which the photoplate fails to solve satisfactorily. For a long time, LLL-TV cameras have been used for EM adjustment but due to their inferior pixel number they were never a real alternative to the photoplate. This situation has changed with the availability of scientific grade slow-scan charged coupled devices (CCD) with pixel numbers exceeding 106, photometric accuracy and, by Peltier cooling, both excellent storage and noise figures previously inaccessible in image detection technology. Again the electron image is converted into a photon image fed to the CCD by some light optical transfer link. Subsequently, some technical solutions are discussed using the detection quantum efficiency (DQE), resolution, pixel number and exposure range as figures of merit.A key quantity is the number of electron-hole pairs released in the CCD sensor by a single primary electron (PE) which can be estimated from the energy deposit ΔE in the scintillator,

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