High-precision fiber-optic time synchronization and its application in power grid fault location

Chunbo Yao; Feng Zhao; Feng He; Yulin Peng

doi:10.1117/12.2687207

6 August 2023 High-precision fiber-optic time synchronization and its application in power grid fault location

Chunbo Yao, Feng Zhao, Feng He, Yulin Peng

Proceedings Volume 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023); 127810L (2023) https://doi.org/10.1117/12.2687207
Event: 2023 International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 2023, Guangzhou, JS, China

Abstract

Deploying a high-precision fiber-optic time synchronization network in the power grid can effectively support the safe operation of the grid. Firstly, a fault location model was constructed using the shortest path algorithm to address the complex loop network structure, and the impact of time synchronization on the accuracy of power grid fault location was analyzed. Then, a high-precision fiber-optic time synchronization composite signal transmission technology was proposed. This technology can deploy a high-precision fiber-optic time synchronization network in a complex power grid and ensure high-precision time synchronization of various monitoring nodes in the power grid by accurately transmitting time-frequency signal in the fiber through signal processing. Experimental results show that in time synchronization accuracy tests under normal temperature conditions, the time interval error of the fiber-optic time synchronization network is -10 ps and the time deviation is 35 ps, both of which far exceed the standard requirements. When the fiber works at changing temperatures, this technology can still transmit time-frequency signals with high accuracy in the fiber-optic time synchronization network, maintaining a high degree of time synchronization stability. Therefore, this technology can be applied to power grids in different working environments to improve the accuracy of power grid fault location.

Citation Download Citation

Chunbo Yao, Feng Zhao, Feng He, and Yulin Peng "High-precision fiber-optic time synchronization and its application in power grid fault location", Proc. SPIE 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 127810L (6 August 2023); https://doi.org/10.1117/12.2687207

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KEYWORDS

Power grids

Time-frequency analysis

Fiber optics

Fiber optic networks

Signal processing

Data transmission

Frequency modulation

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