China
Africa
Explore chapters and articles related to this topic
Introduction
Published in Anjan K. Deb, Power Line Ampacity System, 2017
Another recent development in transmission line conductor technology is the integration of optical fiber communication technology in the manufacture of powerline conductors. In an Optical Ground Wire (OPGW) system, a fiberoptic cable is placed inside the core of the overhead ground wire. In certain transmission line applications, the fiberoptic cable is placed inside the core of the power conductor. Communication by fiber optics offers a noise-free system of data communication in the electric utility environment since communication by optical fiber is unaffected by electromagnetic disturbances. The different types of conductors are shown in Figure 1.10. Important physical properties of the different types of wires used in the manufacture of powerline conductors are given in Appendix B.
Distributed Strain Sensors Practical lssues, Solutions And Applications
Published in Arthur H. Hartog, An Introduction to Distributed Optical Fibre Sensors, 2017
BOTDR has been proposed for monitoring overhead power lines, partly in connection with heat detection resulting from lightning strikes, but also strain induced by ice loading [86]. The ground wires that run above the phase conductors in high-voltage transmission lines increasingly frequently incorporate optical fibres for communication [87]; there has been limited use of this channel for sensing. Optically enabled ground wires are known as optical ground wire (OPGW). The information that is required is temperature and the related sag caused by thermal expansion; the latter would result in strain on fibres inside the OPGW insofar as they are coupled to the wire.
Communication Techniques
Published in B K Bala, Energy Systems Modeling and Policy Analysis, 2022
Optical fiber transmission is used both inside substations and for long-distance transmission of data. They are often embedded in the stranded conductors of the shield (ground) wires of overhead lines. This cable is known as an optical ground wire (OPGW). OPGW cable contains a tubular structure with one or more optical fibers in it, surrounded by layers of steel and aluminum wire. Optical fibers may be wrapped around phase conductors or sometimes a standalone cable.
Review on the Developments and Potential Applications of the Fiber Optic Distributed Temperature Sensing System
Published in IETE Technical Review, 2021
Ramji Tangudu, Prasant Kumar Sahu
R. V. Carvalho et al. [59] proposed and demonstrated a temperature detection scheme in transmission lines using Brillouin OTDR-based DTS system. To improve the performance of the DTS system, a calibration algorithm was implemented by the authors. In this work, the sensing fiber was kept inside an optical ground wire. The transmission lines were connected by multiple optical fibers. The 230 kV Ibipora-Londrina transmission line was considered for their work. In this work, the sensing fiber was made up of three different fibers, and all these fibers were connected by the splicing process. The ∼ 28 km length of SOF with ∼ 1 m of spatial resolution, and 6°C of sensing resolution were achieved in their work. Here, the ∼ 28 km length of SOF consists of three different fibers, the lengths of these three fibers were 350 m, 12 km, and 15.5 km respectively [59].