Calculation and Analysis of Induced Current in Optical Fiber Composite Overhead Ground Wire

The optical fiber smart composite structures have been widely applied for the structural health monitoring, and the packaging technique of integrating optical fiber sensor with host structure is one of the key issues. The flame spraying coating provides strong adhesive strength with good heat resistance, which is particularly suitable for the packaging applications in harsh environments. However, the elaboration process of flame spraying coating–based fiber composite structure faces great challenges due to the flame spraying mechanisms. This study evaluates numerically an overall effect of flame spraying coating formation process on the structural and the optical properties of the embedded fiber optic based on a three-dimensional finite element model. First, the lumped capacitance method is used; both the average heat flux density in the whole spraying process and the specific heat flux density of each torch sweep are estimated to initialize the thermo-mechanical modeling. Then, the stress distributions in both radial and axial directions of the embedded fiber are discussed separately. Next, the variation of refractive index of the embedded fiber optic due to the residual strain is also investigated. Finally, the elaboration parameters including torch displacement and velocity are evaluated and optimized. The simulation results show that the embedded fiber optic maintains good structural and optical properties with the presented elaboration conditions, and therefore its transmission and sensing performance can be ensured.

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Study for the Condition Monitoring and Status Assessment of Optical fiber composite low-voltage cable

2018 IEEE International Conference on Electronics and Communication Engineering (ICECE) ◽

10.1109/icecome.2018.8644779 ◽

2018 ◽

Author(s):

Lei Yuqing ◽

Qi liyan ◽

Lei weiqing ◽

Guo kunya ◽

Tong jie

Keyword(s):

Optical Fiber ◽

Condition Monitoring ◽

Low Voltage ◽

Fiber Composite ◽

Status Assessment

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Research of Smart Composite Insulator with Optical Fiber Bragg Grating

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.423-426.2563 ◽

2013 ◽

Vol 423-426 ◽

pp. 2563-2569

Author(s):

Hong Lei Yang ◽

Shi Bin Liang ◽

Xue Peng Miao ◽

Min Cao ◽

Ming Chang

Keyword(s):

Optical Fiber ◽

Transmission Line ◽

Fiber Composite ◽

Short Circuit ◽

Performance Testing ◽

Electrical Performance ◽

Stable Operation ◽

Composite Insulator ◽

Electric Transmission ◽

Electric Transmission Line

On-line monitoring of lightning,ice,short circuit on electric transmission line and insulator's operation state is of great significance to ensure the safe and stable operation of the electric transmission line.An intelligent composite insulator,in which the core rod has fiber Bragg gratings is developed.lightning,ice,short circuit on electric transmission line and insulator's operation state can be reflected by monitoring the center wavelengths of the fiber Bragg gratings.The temperature, strain response and electrical performance testing experiments on 110 kV fiber composite insulator were done,the result indicates that the optical fiber composite insulator can measure the temperature accurately;the load of composite insulator can be monitored approximately by no. 2 and no.4 monitoring sites;the110 kV fiber composite insulator’s dry lightning impulse withstand voltage is 421 kV,the normal polarity of steep wave impulse voltage withstand voltage is 434 kV(steepness:1206kV/μs),the negative polarity withstand voltage is 444 kV(steepness:1132kV/μs)and the dry power frequency withstand voltage is 230 kV at the altitude of 1970m.

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Detection of Electromagnetic Pulse Induced Hazard on Electroexplosive Device Based on Optical-Fiber Fluorescence

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.7492 ◽

2011 ◽

Vol 383-390 ◽

pp. 7492-7495

Author(s):

Lan Shu Liu ◽

Wen Song Zhang ◽

Xiang Ping Zhu

Keyword(s):

Optical Fiber ◽

Electromagnetic Interference ◽

Electromagnetic Pulse ◽

Hazard Analysis ◽

Fast Response ◽

Induced Current ◽

Core System ◽

The Core ◽

Security And Reliability ◽

Set Up

The electroexplosive devices(EED) are widely used in the core system of rocket, missile and nuclear weapons. Hazard analysis and measurement of electromagnetic pulse is of great importance to the security and reliability of EED. In this article, an optical-fiber fluorescence temperature sensor is proposed for analyzing hazard induced by electromagnetic pulse of EED. The temperature of EED can be measured through the fluorescence lifetime, then the induced current is obtained, and thereby the electromagnetic pulse induced hazard can be draw. The experiments show that, the set-up of this proposal can works with high precision and fast response, and immune to the electromagnetic interference.

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