A differential protection scheme for tapped transmission line containing UPFC and wind farm

2014 ◽  
Author(s):  
L. N. Tripathy ◽  
Manas Kumar Jena ◽  
S. R. Samantaray ◽  
D. R. Dash
Keyword(s):  
Transmission Line ◽  
Wind Farm ◽  
Differential Protection ◽  
Protection Scheme

scholarly journals An improved Bergeron differential protection for half-wavelength AC transmission line

2021 ◽  
Vol 257 ◽  
pp. 01016
Author(s):  
Pengfei Shao ◽  
Yu Li ◽  
Ruiming Fang ◽  
Xinghua Guo
Keyword(s):  
Transmission Line ◽  
Short Circuit ◽  
Differential Protection ◽  
Protection Scheme ◽  
Transmission Distance ◽  
Half Wavelength ◽  
Current Differential Protection ◽  
And Performance ◽  
Ac Transmission ◽  
Short Circuit Fault

Half-wavelength AC transmission line has the characteristics of long transmission distance and high voltage level, and its fault characteristics are significantly different from conventional transmission line. In order to reduce the interference of distributed capacitive current on half-wavelength AC transmission line on the calculation of current differential protection, this paper proposes a new current differential protection scheme based on Bergeron model. In order to solve the problem of small differential current located at the midpoint when a short circuit fault occurs, a solution using different methods to calculate setting value in different areas is proposed. The protection can move quickly near the terminal and delay to act in the middle area. After simulation and verification on the PSCAD experimental platform, it is found that when there is a fault at both terminals of the line, the protection can quickly operate in about 10 ms; when fault occurs in the middle area, the protection can delay its operation. The experimental results show that the various actions and performance of the protection device can meet the requirements of safe operation of half-wavelength transmission line.

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