Analysing of key technology and application of N×200Gbit/s for long distance transmission

2021 ◽  
Author(s):  
Jianhua Xi ◽  
Junshi Gao
Keyword(s):  
Long Distance ◽  
Key Technology ◽  
Long Distance Transmission

A Novel IoT-Based Method for Real-Time Detection of Spontaneous Leaks in Pipelines, Gathering Systems, and Offshore Risers

2021 ◽  
Author(s):  
Matthew Grimes ◽  
Nico Van Rensburg ◽  
Stuart Mitchell
Keyword(s):  
Signal Processing ◽  
Transmission Lines ◽  
Negative Pressure ◽  
Pressure Wave ◽  
Long Distance ◽  
Non Invasive ◽  
Long Distance Transmission ◽  
Offshore Production ◽  
Offshore Risers ◽  
Oil Gas

Abstract This paper presents on a non-invasive, IoT-based method for rapidly determining the presence and location of spontaneous leaks in pressurized lines transporting any type of product (e.g., oil, gas, water, etc.). Specific applications include long-distance transmission lines, gathering networks at well sites, and offshore production risers. The methodology combines proven negative pressure wave (NPW) sensing with advanced signal processing to minimize false positives and accurately identify the presence of small spontaneous leaks within seconds of their occurrence. In the case of long-distance transmission pipelines, the location of the leak can be localized to within 20-50 feet. The solution was commercialized in 2020 and has undergone extensive testing to verify its capabilities. It is currently in use by several operators, both onshore and offshore.

Analysis of steady-state stability of long-distance transmission systems

1978 ◽  
Vol 98 (4) ◽  
pp. 63-72
Author(s):  
Toshihiko Saito ◽  
Kozo Aratame ◽  
Hiromichi Sato ◽  
Jiro Nagasaka
Keyword(s):  
Steady State ◽  
Long Distance ◽  
Transmission Systems ◽  
Long Distance Transmission ◽  
Steady State Stability
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