5G通信条件下配网差动保护快速动作方案研究

针对传统差动保护逻辑在5G环境中使用时动作速度较慢的问题，提出了一种适用于5G通信的差动保护方法。首先，分析以光纤为传输媒介时，传统差动保护的逻辑原理和动作时序。其次，分析5G差动保护的通信现状以及将传统的差动保护逻辑应用在5G环境下存在的问题。并通过测算网络通信延时，分析了减少信息传递次数的必要性。最后，优化差动保护逻辑以降低通信延时对动作速度的影响。通过实验验证，改进后的差动保护动作时间加快了10~15 ms，约为信息在5G环境下的传输时延。

A quick action scheme of differential protection for a distribution network with 5G communication

To solve the problem that the traditional differential protection logic has a slow action speed in the 5G environment, a differential protection method suitable for 5G communication is proposed. First, this paper analyzes the logical principle and action sequence of traditional differential protection when optical fibers are used as transmission media. Secondly, the current communication situation of 5G differential protection is analyzed, and the problems existing in the application of the traditional differential protection logic in this environment are also analyzed. By measuring the network communication delay, the necessity of reducing the number of times of information transmission is analyzed. Finally, the differential protection logic is optimized to reduce the influence of communication delay on the action speed. Through experimental verification, the improved differential protection action time is accelerated by 10~15 ms, which is about the transmission delay of information in the 5G environment. This work is supported by the Science and Technology Project of the Headquarters of State Grid Corporation of China (No. 52094020000Y).