Research On Long-distance Quantum Communication Technologies Over Power Aerial Optical Environment

As the foundation of energy industry,the power industry requires extremely high information security.At present,classical encryption is mainly used to ensure information security,but the ever-increasing computing power poses a threat to classical encryption algorithms.Quantum cryptography,which gradually becomes a hot spot in information security research,relies on quantum physics to ensure unconditional information security.Therefore,it is of great significance to adopt quantum communication technology of higher security to improve the safety of power system communication.This paper studies the application scheme of long-distance quantum key distribution in power aerial optical environment.First of all,the paper proposes three environment factors which affect quantum key distribution over the power aerial optical environment by analyzing the principle of quantum key distribution system and combining with the characteristics of the electric aerial optical cable.The effect of the three environment factors are tested through experiments and the limitation of the existing quantum key distribution system over the electric power aerial optical environment is analyzed based on the test results.Secondly,on the basis of the analysis results,the paper uses the scheme of line polarization independent quantum key distribution which is suitable for long-distance power overhead environment so as to avoid the great impact of power overhead environment on the state of the quantum polarization.In addition,the applicability of decoy protocol,system detection module and phase coding module in power overhead environment are analyzed theoretically,and the irrelevant characteristics of line polarization in power overhead environment are proved.Finally,the paper verifies the scheme through experiments which show that the scheme can well adapt to the experimental environment of overhead optical fiber cable.The scheme not only avoids the violent impact of the galloping on the quantum polarization,but also boasts outstanding advantages in the transmission distance and Quantum signal stability.Hence,the scheme lays a solid foundation for the practical application of quantum communication technology in the overhead environment.