Theoretical Study on Dynamic Capacity-increase of Transmission Lines

2008 ◽  
Author(s):  
Huang Xinbo ◽  
Cheng Ronggui
Keyword(s):  
Transmission Lines ◽  
Theoretical Study ◽  
Dynamic Capacity ◽  
Capacity Increase

The Research and Application of Power Grid Transmission Interface Dynamic Capacity-Increase Technology

2013 ◽  
Vol 462-463 ◽  
pp. 141-149
Author(s):  
Xiang Fu Guo ◽  
Xin Bo Huang ◽  
Di Ming Wan ◽  
Zhi Min Guo ◽  
Lei Liu
Keyword(s):  
Transmission Lines ◽  
Power Grid ◽  
Current Line ◽  
Mathematical Relationship ◽  
Dynamic Capacity ◽  
Capacity Increase ◽  
Interface Dynamic ◽  
New Type ◽  
Allowable Temperature ◽  
Important Significance

The real-time capacity-increase technology of transmission lines is adopted to increase transmission current capacity of transmission lines, by which the conductor temperature, the ambient temperature and the wind speed can be timely measured and the transmission current capacity can be adjusted dynamically without breach of available rules. A new type of Morgan's transmission line dynamic capacity-increase model is established, which can fast and effective computing the current line transmission capacity, and the transient running formula of transmission lines is established, the mathematical relationship between the conductor allowable temperature and the variety of sag of the span is presented, and the application of the monitoring device is introduced, it has important significance to research the power grid transmission interface dynamic capacity-increase technology.

Induced Voltage Behavior on Pipelines Due to HV AC Interference: Effective Length Concept

2015 ◽  
Vol 16 (2) ◽  
pp. 131-139
Author(s):  
Mohamad Nassereddine ◽  
Jamal Rizk ◽  
Mahmood Nagrial ◽  
Ali Hellany
Keyword(s):  
Environmental Impact ◽  
High Voltage ◽  
Transmission Lines ◽  
Theoretical Study ◽  
Effective Length ◽  
Induced Voltage ◽  
Shielding Factor ◽  
Ac Interference ◽  
Superposition Theorem

Abstract High-voltage infrastructure upgrade is expending due to the growth in populations. To save on easement cost and to reduce the environmental impact of these projects, HV transmission lines occupy the same easement as pipelines in many cases. This joint easement introduces the AC interference between transmission lines and pipelines. The induced voltage can reach a limit which will jeopardize the human safety. The cited research studies the induced voltage under the presence of the overhead earth wire (OHEW) using the shielding factor. The work in this paper studies the induced voltage using the OHEW section current along with the superposition theorem. The simulations are compared to the existing research methods. The case study along with the theoretical study discusses the advance accuracy of the proposed method over the existing shield factor used in the presence research. Furthermore, they introduce the effective length along with the effective shielding factor, which aids in computing the additional effect that the OHEW has on the induced voltage.

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