Application of the Fiber Optical Current Transformer in the 110kV Smart Substation

2012 ◽  
Author(s):  
Wang Na ◽  
Wan Quan
Keyword(s):  
Current Transformer ◽  
Fiber Optical ◽  
Smart Substation

scholarly journals Research on error mechanism analysis and compensation method of Fiber-Optical Current Transformer

2019 ◽  
Vol 1311 ◽  
pp. 012012
Author(s):  
Dengyun Li ◽  
Min Lei ◽  
Dandan Zhang ◽  
Shi Mo ◽  
Yongfeng Chai
Keyword(s):  
Current Transformer ◽  
Compensation Method ◽  
Mechanism Analysis ◽  
Fiber Optical

The Development about Multifunction Merging Unit Used in Smart Substation

2014 ◽  
Vol 1070-1072 ◽  
pp. 1391-1397
Author(s):  
Chen Fan ◽  
Yi Min Ni ◽  
Guo Qing Zhao
Keyword(s):  
Current Transformer ◽  
The State ◽  
Good Effect ◽  
Voltage Transformer ◽  
Intelligent Diagnosis ◽  
Merging Unit ◽  
Electronic Current Transformer ◽  
Electronic Current ◽  
Status Signal ◽  
Smart Substation

The merging unit is used to realize the digitalization and sharing of the data of process and is widely used with the electronic voltage transformer (EVT) and electronic current transformer (ECT). As the construction of smart substation which is presented by the state grid company of china, a serial new requirements and needs about the merging unit are proposed and the merging unit which only sends the sampling value can not meet it. The new demands of the smart substation are analyzed, The design of hardware and the implement of the function are presented. The multifunction which including the model of sampling, the data catenation, the acquisition of status signal through GOOSE , the voltage parallel and switching and the synchronization of device are analyzed in detailed. At the end, the function of intelligent diagnosis and debug is introduced. The device has been used in the project of smart substation and takes good effect.

Application of Special Optical Fiber Sensing Technology in New Generation of Smart Substation

2014 ◽  
Vol 986-987 ◽  
pp. 1191-1195
Author(s):  
Rui Rui Yang ◽  
Hui Yuan Yang ◽  
Wei Chi Ou
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Current Transformer ◽  
Bragg Grating ◽  
Distributed Temperature Sensing ◽  
Fiber Sensing ◽  
Sensing Technology ◽  
Optical Fiber Sensing ◽  
New Generation ◽  
Smart Substation

The new generation of smart substation puts forward higher requirements to sensing technology. Based on the needs of these requirements, four kinds of special optical fiber sensing technology in power systems were researched: all-optical current transformer, distributed temperature sensing technology, fiber grating vibration sensing technology and fiber Bragg grating sensing technology. These kinds of optical fiber sensing technology for the new generation of smart substation to enhance its performance were analyzed. Finally, based on the fiber Bragg grating sensing technology, the online oil and winding temperature monitoring system was constructed for the new generation of smart substation.

scholarly journals Electronic Current Transformer Defects Statistical Analysis of Intelligent Substation

2021 ◽  
Vol 2087 (1) ◽  
pp. 012088
Author(s):  
Bin Liu ◽  
Xiaodong Xie ◽  
Junjun Xiong ◽  
Xiaopin Deng ◽  
Hua Huang
Keyword(s):  
Statistical Analysis ◽  
Current Transformer ◽  
Defect Analysis ◽  
Electronic Components ◽  
Electronic Current Transformer ◽  
Defect Rate ◽  
Electronic Current ◽  
Operation Status ◽  
Level Production ◽  
Smart Substation

Abstract In order to master operation status of the electronic current transformer(ECT), application investigation and defects statistical analysis were conducted on ECT of 110(66)kV~1000kV applied in smart substation of the State Grid Corporation of China(SGCC). The defect location, defect cause and defect type of ECT with different principles are analyzed. The results indicate that the defects of ECT are mainly concentrated in the acquisition unit, the defect rate is closely related to the reliability of electronic components, the technical level, production process and quality control of the manufacturer. In view of the typical defect analysis, the corresponding solution measures are put forward to provide reference for the subsequent research and application of ECT.

scholarly journals Fault Mechanism of Fiber Optical Current Transformer Based on Signal Processing Method

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Fubin Pang ◽  
Qiang Huang ◽  
Yu Liu ◽  
Peng Li ◽  
Xiangping Kong ◽  
...  
Keyword(s):  
Signal Processing ◽  
Second Harmonic ◽  
Harmonic Component ◽  
Current Transformer ◽  
Processing Method ◽  
Fault Analysis ◽  
Measured Current ◽  
Signal Processing Method ◽  
Fiber Optical ◽  
Fault Mechanism

The fiber optical current transformer (FOCT) with sine wave modulation has been widely used in the DC transmission project, while its fault rate is much higher than that of an electromagnetic current transformer, which seriously threatens the safe operation of power grid. In order to investigate the fault mechanism of FOCT, the output signal model of the FOCT photodetector is established, and its basic methods of modulation and demodulation are analyzed to explore the influencing factors of the signal processing method used in the calculation of measured current. It is found that the reduction of the second harmonic component in the photodetector output is the root cause of FOCT fault, and the optical path, modulation signal amplitude, and measured current are important factors affecting the second harmonic component. The influencing law of three factors on the second harmonic component is calculated by simulation and the characteristic differences between them are given. Finally, the fault simulation test of FOCT light intensity and a modulation circuit were carried out in the laboratory, and the results verify the correctness of theoretical analysis. The research in this paper provides reference for fault analysis and reliability improvement of FOCT.

scholarly journals Design and applicability analysis of independent double acquisition circuit of all-fiber optical current transformer

2019 ◽  
Vol 2 (6) ◽  
pp. 531-540
Author(s):  
Songlin Gu ◽  
Liu Han ◽  
Dongwei Liu ◽  
Wenbin Yu ◽  
Zhihong Xiao ◽  
...  
Keyword(s):  
Current Transformer ◽  
Fiber Optical
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