Evaluation of Fiber Optic Time and Frequency Distribution System in a Coherent Communication Network

2019 ◽  
Author(s):  
Sven-Christian Ebenhag ◽  
Per Olof Hedekvist ◽  
Carsten Rieck ◽  
Magnus Bergroth ◽  
Przemyslaw Krehlik ◽  
...  
Keyword(s):  
Communication Network ◽  
Frequency Distribution ◽  
Distribution System ◽  
Fiber Optic ◽  
Coherent Communication

Design and Simulation of a PC to PC Communication Network via Fiber Optic Cable

2013 ◽  
Vol 824 ◽  
pp. 206-214
Author(s):  
Babatunde A. Adegboye ◽  
B.B. Bello ◽  
K.R. Ekundayo ◽  
Juliet N. Adegboye
Keyword(s):  
Communication Network ◽  
Fiber Optic ◽  
Data Transfer ◽  
The Internet ◽  
Serial Port ◽  
Fiber Optic Cable ◽  
Optical Transmitter ◽  
Wireless Medium ◽  
Fiber Optic Communication ◽  
Optic Communication

This paper deals with data transfer from one computer to another. The serial ports of the computer are used. MAX 232 is used to convert RS 232 logic to TTL logic and then an optical transmitter circuit is used to transmit data via fiber optic cable. The optical transmitter circuit has an LED which is matched with the cable. At the receiver an optical receiver circuit is used which receives data using a photo diode and a MAX 232 again to convert TTL logic to RS 232 for the serial port at the receiving end computer. The desired baud rate can be set. Although the internet can be used, but due to its time consuming nature, one can implement data transfer using wireless medium, though at a relatively high cost. The need, therefore, is felt for fiber optic communication which is cheaper and more suitable for the task. It is cheaper than wireless medium and is prone to lesser loss as compared to wireless medium.

STABILIZATION OF THE REFERENCE SIGNAL PHASE OF THE FIBER OPTICAL DISTRIBUTION UHF SYSTEM

2021 ◽  
pp. 120-124
Author(s):  
S. A. Ostanin ◽  
M. D. Zhumadilov
Keyword(s):  
Wavelength Range ◽  
Distribution System ◽  
Fiber Optic ◽  
Reference Signal ◽  
Phase Delay ◽  
Original Design ◽  
Signal Phase ◽  
Fiber Optical ◽  
Reference Signals ◽  
Optical Distribution

The purpose and composition of the radio-photon components of the fiber-optic distribution system of reference signals of the decimeter wavelength range are described. The principle of the components of the fiber-optic distribution system of reference signals is described. The possibility of creating radio-photon components with improved technical characteristics in comparison with the closest foreign functional analogues has been proved. High technical characteristics are achieved by the original design and parametric compensation of the phase delay of the signal.

scholarly journals Systematic Effectiveness Assessment Methodology for Fault Current Indicators Deployed in Distribution Systems

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2582 ◽  
Author(s):  
Jen-Hao Teng ◽  
Chia-Hung Hsieh ◽  
Shang-Wen Luan ◽  
Bo-Ren Lan ◽  
Yun-Fang Li
Keyword(s):  
Communication Network ◽  
Distribution System ◽  
Distribution Systems ◽  
Optimal Number ◽  
Battery Life ◽  
Fault Current ◽  
Failure Rates ◽  
Assessment Methodology ◽  
Actual Distribution ◽  
Effectiveness Assessment

Fault Current Indicators (FCIs) with communication interfaces have been widely used in distribution systems to reduce fault-finding time. The effectiveness of a Fault Management System (FMS) composed of FCIs greatly depends on the performance of the communication network deployed by the FCIs and the failure rates of distribution systems. The conventional techniques only focus on the issues of optimal number and location of FCIs or communication network deployment individually; therefore, the effectiveness of an FMS cannot be assessed realistically. A systematic effectiveness assessment methodology for FMS considering the performance of the communication network deployed by the FCIs and the failure rates of distribution systems is vital and is investigated in this paper. A communication evaluation platform is designed in this paper and used to acquire the field measurements of communication parameters. The communication parameters, especially the Packet Success Rate (PSR), between two adjacent FCIs are measured, and the Probability Density Function (PDF) of the PSR can be built accordingly. The effectiveness of the FMS is then assessed by stochastic analysis considering the failure rates of the distribution system and PSR PDFs between two adjacent FCIs. Due to the characteristics of easy installation, maintenance, longer battery life, lower cost, and so on of ZigBee, the ZigBee-based FCI is mainly discussed in this paper. In order to efficiently find the communication route when a fault occurs, a fast communication route tracking method is also proposed in this paper and its feasibility is demonstrated in an actual distribution system. Experimental and simulation results demonstrate the validity of the proposed systematic effectiveness assessment methodology for an FMS composed of FCIs. The proposed assessment methodology can more realistically react to the actual conditions of the FMS and therefore save on installation time and costs.

scholarly journals FDIPP: False Data Injection Prevention Protocol for Smart Grid Distribution Systems

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 679 ◽  
Author(s):  
Hosam Hittini ◽  
Atef Abdrabou ◽  
Liren Zhang
Keyword(s):  
Communication Network ◽  
Smart Grid ◽  
Distribution System ◽  
Network Architecture ◽  
Distribution Systems ◽  
Network Performance ◽  
Vast Number ◽  
False Data Injection ◽  
Prevention Protocol ◽  
The Impact

In this paper, a false data injection prevention protocol (FDIPP) for smart grid distribution systems is proposed. The protocol is designed to work over a novel hierarchical communication network architecture that matches the distribution system hierarchy and its vast number of entities. The proposed protocol guarantees both system and data integrity via preventing packet injection, duplication, alteration, and rogue node access. Therefore, it prevents service disruption or damaging power network assets due to drawing the wrong conclusions about the current operating status of the power grid. Moreover, the impact of the FDIPP protocol on communication network performance is studied using intensive computer simulations. The simulation study shows that the proposed communication architecture is scalable and meets the packet delay requirements of inter-substation communication as mandated by IEC 61850-90-1 with a minimal packet loss while the security overhead of FDIPP is taken into account.

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