A novel unit transient based protection criterion for high-voltage power transmission line

2005 ◽  
Author(s):  
Xia Mingchao ◽  
Huang Yizhuang
Keyword(s):  
Transmission Line ◽  
High Voltage ◽  
Power Transmission ◽  
Power Transmission Line ◽  
Transient Based Protection

An Integrated Boundary Protection Scheme for Power Transmission Line Systems

2008 ◽  
Vol 9 (2) ◽  
Author(s):  
Zhiqian Bo ◽  
Baohui Zhang ◽  
Jinghan He ◽  
Xinzhou Dong ◽  
Andrew Klimek
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Line ◽  
Communication Link ◽  
Power System Protection ◽  
Protection Scheme ◽  
System Protection ◽  
Simulation Results ◽  
Transient Based Protection

This paper presents an integrated boundary protection scheme for power transmission line systems. The scheme combines the latest developments in two areas of power system protection, the transient based protection and the integrated protection. In the proposed scheme, an integrated relay based on the boundary protection principle installed at a substation is responsible for the protection of all transmission lines associated with the substation. The relay is able to offer a fast trip for any fault on its protected line sections without the need for a communication link. The paper outlines the integrated protection system based on the substation communication network, and gives a description of the basic principle and algorithm of the boundary protection technique. Some typical simulation results are then used to demonstrate the performance of the scheme.

Economic Analysis on Application of Large Section Conductor in Ultra-High Voltage DC Engineering

2013 ◽  
Vol 457-458 ◽  
pp. 1575-1580 ◽  
Author(s):  
Zhen Liu ◽  
Kuan Jun Zhu ◽  
Jian Cheng Wan ◽  
Jun Zhang ◽  
Jia Jun Si ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Transmission Line ◽  
High Voltage ◽  
Power Transmission ◽  
Mechanical Performance ◽  
Power Transmission Line ◽  
Large Section ◽  
Dc Power ◽  
Dc Power Transmission ◽  
Economic Comparison

At present, large section conductors applied in domestic ±800kV ultra-high DC power transmission line consist of 6×720mm2, 6×900mm2 and 6×1000mm2 conductors. This paper analyzes initial engineering investment and mechanical performance of 6×JL1/G2A-720/50, 6×JL1/G3A-900/40, 6×JL1/G3A-1000/45, 6×JL1/G2A-1250/70 and 6×JL1/G2A-1520/125 conductor plans, carry out economic comparison of the whole life period of these 5 conductor plans, demonstrate economic of 6×JL1/G2A-1250/70, and 6×JL1/G2A-1520/125 conductor plans in ±800kV ultra-high DC power transmission line is more advantageous when annual loss hours is too high, and the 6×JL1/G2A-1250/70 plan can save initial investment of engineering compared to the 6×JL1/G2A-1520/125 plan.

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