Risk Model and Defense Strategy for Operation and Maintenance of Remote Terminal Units in Distribution System

In the context of digital transformation, the large-scale Remote Terminal Unit access to distribution system and its operation and maintenance (O&M) process has posed new challenges to the existing information security. Based on the current situation of distribution terminals cyber security, this article first analyzes the security flaws, as well as the risks of information and data leakage in the process of O&M. Then based on the cyber and physical characteristics of distribution Internet of Things (IoT), a risk-based model is constructed. Finally, a dynamic defense strategy for terminal operation and maintenance is proposed to strengthen the communication security of terminal operation and maintenance and resist malicious attacks.