Research On Quantum Key Application Technology For Power Dispatching Service

The power dispatching data network is an important part of the modern large-scale interconnected power grid and the basis for realizing the automation of power grid dispatching.With the rapid development of information and communication technologies,the scale of power dispatching data networks and the number of services are increasing,making it more prominent in the operation of power systems.However,the security measures of the current power dispatching service system are based on the classical cryptographic algorithm.The long-term security of the key is difficult to guarantee.At the same time,a considerable amount of services in the power dispatching system are directly transmitted in plaintext,thus the power dispatching system has a larger information security risks.In this thesis,the most mature Quantum Key Distribution(QKD)technology is introduced into the power dispatching system.Firstly,the decoy quantum key distribution technology is analyzed to ensure the security of quantum key distributi-on under non-ideal light sources.Furthermore,the vacuum+weak decoy quantum key distribution under the infinite and the finite data set with statistical fluctuations is analyzed.The infinite and the finite solution are full parameter optimized by the local search algorithm(LSA),showing better performance in security key generation rate and secure transmission distance.Then,the power dispatching service key supply and dynamic adjustment scheme are designed,and a real-time dynamic key adjustment algorithm based on service queuing is proposed.The key supply is performed by using different quantum key application methods and pre-assigned key quantities,and the algorithm of the step-by-step adjustment key application and the key update frequency reduction algorithm are adjusted in real time to ensure the sufficient supply of the quantum key to the greatest extent.Finally,the power dispatching service model is established,and the application performance of the algorithm in the scheduling network architecture is simulated.Aiming at the problem of site key generation and consumption mismatch in traditional time-division multiplexing method,a time slot allocation scheme based on key production-to-sale ratio in observation time is proposed.By analyzing the adjustment of the ratio of production to sales under normal conditions and abnormal conditions,the quantum key supply scheme and the dynamic adjustment actual effect are verified,thereby maximizing the efficiency of quantum key distribution and the security of service transmission is guaranteed.