The negative-sequence distance protection for UHV long distance transmission line

2008 ◽  
Author(s):  
Li Bin ◽  
Ma Chao ◽  
He Jiali ◽  
Bo Zhiqian
Keyword(s):  
Transmission Line ◽  
Distance Protection ◽  
Long Distance ◽  
Negative Sequence ◽  
Long Distance Transmission

scholarly journals Application of Total Adaptive Generation Controller (TAGEC) to a Hydropower Generator Connected with a Long-distance Transmission Line

1993 ◽  
Vol 113 (10) ◽  
pp. 1155-1164
Author(s):  
Yasuo Morioka ◽  
Hiroyuki Tanaka ◽  
Takehiko Kojima ◽  
Tomohiro Suzuki ◽  
Shun-ichirou Hanada
Keyword(s):  
Transmission Line ◽  
Long Distance ◽  
Long Distance Transmission

Novel Distance Protection Based on Distributed Parameter Model for Long-Distance Transmission Lines

2013 ◽  
Vol 28 (4) ◽  
pp. 2116-2123 ◽  
Author(s):  
Guobing Song ◽  
Xu Chu ◽  
Shuping Gao ◽  
Xiaoning Kang ◽  
Zaibin Jiao ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Distributed Parameter ◽  
Distance Protection ◽  
Long Distance ◽  
Long Distance Transmission ◽  
Distributed Parameter Model

scholarly journals STUDY OF VOLTAGE MODE IN THE LONG-DISTANCE AC TRANSMISSION LINE

2021 ◽  
Vol 2021 (59) ◽  
pp. 43-55
Author(s):  
T.L. Katsadze ◽  
◽  
D.V. Nastenko ◽  
O.M. Panienko ◽  
O.M. Iankovska ◽  
...  
Keyword(s):  
Mathematical Models ◽  
Transmission Line ◽  
Extreme Point ◽  
Transmission Lines ◽  
Power Transmission ◽  
Voltage Distribution ◽  
Long Distance ◽  
Third Order ◽  
Long Distance Transmission ◽  
Wide Range

The charging currents of EHV transmission lines cause the Ferranti effect, which causes an increase in voltage at intermediate points transmission line. The work aims to study the laws of the voltage distribution along the line route and to develop a method for determining the coordinates of a point with extreme voltage. Methodology. Mathematical modeling of long-distance transmission lines in Wolfram Mathematica allowed to form the laws of the voltage distribution along the line and determine the coordinate of the extreme point on the voltage. Results. It is shown that the application of the traditional model of idealized power transmission causes high modeling accuracy only in the modes of unloaded line and low loads. In the range of medium and high loads, the simulation error reaches unacceptably large values. The paper proposes more accurate models for determining the coordinate of an extreme voltage point: linearized and second- and third-order models. It is shown that the proposed models are characterized by higher accuracy in a wide range of loads. Increasing the degree of the model results in higher accuracy, but is associated with an increase in the cumbersomeness of the mathematical model. It is shown that first and second-order models provide sufficient accuracy for typical designs of 750 kV power transmission lines. It is shown that neglecting the losses on the corona has almost no effect on the accuracy of calculating the coordinates of the extreme point on the voltage, which simplifies the linear calculation model and models of the second and third-order. Originality. Mathematical models of the first, second and third orders have been developed for high-precision determination of the coordinate of a voltage-extreme point along a long-distance transmission line. Practical significance. The offered mathematical models are intended for application in problems of regulation and adjustment of parameters of flexible power transmissions. Ref. 12, figure, tables 4.

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