基于量子保密通信的光纤时间同步方法与验证  

Fiber-Optic Time Synchronization Method and Verification Based on Quantum Private Communication

作　　者：田腾 赵龙 仇茹嘉 董王朝 耿佳琪 王恩惠 Tian Teng;Zhao Long;Qiu Rujia;Dong Wangchao;Geng Jiaqi;Wang Enhui(State Grid Anhui Electric Power Research Institute,Hefei 230601,China)

机构地区：[1]国网安徽省电力有限公司电力科学研究院,合肥230601

出　　处：《微纳电子技术》2025年第3期47-52,共6页Micronanoelectronic Technology

基　　金：国网安徽省电力有限公司科技项目资助(B31205230023)。

摘　　要：高精度时间同步是电力系统正常运行的基础,为了提高电力系统中时间同步的精度及其安全性,将量子保密通信技术和光纤时间同步技术相结合,提出了基于量子保密通信的光纤时间同步方法。该方法利用光纤进行时间同步,显著提升了电力系统的同步精度,并通过量子保密通信系统对光纤时间同步过程中的数据信息进行加密,从而进一步增强了系统的安全性。为了验证方法的可行性,搭建了基于量子保密通信的光纤时间同步测试系统,在实验室中长度为100 km光纤盘纤上进行了可行性验证与时间同步性能测试,实现了稳定度为16.7 ps@1 s、标准差约为20.9 ps的高精度时间同步。为了进一步验证该方法在实际应用中的性能,分别在长度为16.2、12.0和20.8 km的3条实地光纤链路上进行了性能测试,实现了稳定度分别为9.8 ps@1 s、9.4 ps@1 s和7.4 ps@1 s的高精度时间同步。基于量子保密通信的光纤时间同步方法不仅满足了电力系统对高精度、高安全性时间同步的需求,并为今后建立更安全、稳定的光纤时间同步系统提供了参考依据。High-precision time synchronization is the foundation for the normal operation of electric power systems.To enhance the accuracy and security of time synchronization in electric power systems,a fiber-optic time synchronization method based on quantum private communication was proposed by combining quantum private communication technology with fiber-optic time synchronization technology.This method utilizes fiber-optics for time synchronization,significantly improving the synchronization accuracy of electric power systems,and encrypts the data information in fiber-optic time synchronization through a quantum private communication system,thereby further enhancing the security of the system.To verify the feasibility of the method,a test system for fiber-optic time synchronization based on quantum private communication was built,and feasibility verification and time synchronization performance testing were conducted on a 100 km fiber-optic coil in the laboratory,achieving highprecision time synchronization with a time deviation of 16.7 ps@1 s and a standard deviation of about 20.9 ps.To further verify the performance of the method in practical applications,performance testing was conducted on three field fiber-optic links with lengths of 16.2,12.0,and 20.8 km,achieving high-precision time synchronization with stabilities of 9.8 ps@1 s,9.4 ps@1 s,and 7.4 ps@1 s,respectively.The fiber-optic time synchronization method based on quantum private communication not only meets the demand of electric power systems for highprecision and high-security time synchronization but also provides a reference for the establishment of more secure and stable fiber-optic time synchronization systems in the future.

关 键 词：电力系统 光纤 时间同步 量子保密通信 

分 类 号：TN929.11[电子电信—通信与信息系统]