密钥管理是保障智能变电站信息网络安全的关键,其难点在保证密钥安全性基础上建立符合变电站实际的高效方法。针对变电站信息交换范围和关联程度,提出一种轻型化的分层密钥分配方法,以减轻密钥管理中所需的通信和运算负荷。根据控制中心、变电站和智能电子设备的运算和存储能力优化任务分配,详细介绍了密钥的生成、分配、更新与销毁等核心内容,并分析所需运算和通信开销以及各参与方的密钥保存数量。 Key management is to protect the intelligence substation information network security key, the difficulty of ensuring the key security based on the establishment of substations in line with the actual and efficient method. Aiming at the information exchange range and the degree of the substation, a lightweight hierarchical key distribution method is proposed to reduce the communication and computing load required in key management. According to the operation and storage capacity of control center, substation and intelligent electronic equipment, the task assignment is optimized. The core contents of generation, distribution, update and destruction of key are introduced in detail. And the required operation and communication overhead and key of each participant are analyzed. Save the quantity.