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.

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.

Transformer Differential Protection Applications of the Applicant Electronic Current Transformer

2014 ◽  
Vol 644-650 ◽  
pp. 3818-3820
Author(s):  
Li Xue Mei
Keyword(s):  
Current Transformer ◽  
Basic Function ◽  
Electromagnetic Current ◽  
Differential Protection ◽  
Merging Unit ◽  
Electronic Current Transformer ◽  
Electronic Current ◽  
Measurement Principle ◽  
Current Unbalance ◽  
Transformer Differential Protection

This paper mainly analyses, improvement and experiment using the device of Wuhan Hua gong Electric Automation Co., Ltd. existing. As a comparison, this paper firstly analyzes the measuring principle of electromagnetic current transformer and the saturation problem, coil measurement principle and error, a brief summary of the distinction between the two. One time, two times of converter and the merging unit as part of electronic current transformer, this paper also made some analysis. Then analyzed some improvement of transformer differential protection of electronic current transformer based on improved. Firstly, the hardware protection data interface part of, through the analysis of the reasonable selection, then it is based on transformer differential protection of electronic current transformer, the two line ratio braking curve formulation through the analysis of unbalanced current sources, make do with electromagnetic current transformer current unbalance and the ratio braking curve based on the comparative analysis. Finally, the relay protection software the program is changed the basic function of the device is tested, the test results showed that the improved protection device.

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