Research on Key Management Method for New Energy Power System Interconnection Terminals

With the rapid development of new power systems, the power grid is evolving towards a more open, integrated, and intelligent direction of the power Internet of Things, introducing a large number of power IoT terminals for data collection and state perception. The number of IoT terminals is huge, and sensors are the main equipment types, which are relatively limited in storage, computing, and communication resources. Currently, digital certificate technology is the core means to achieve secure access to IoT terminals. However, traditional digital certificate technology is mostly based on foreign algorithms and standards, and highly relies on third-party CA performance. It is difficult to meet the ultra-high concurrent secure access needs of current live network resource limited sensing terminals in terms of autonomous controllability, resource occupancy, and efficiency performance. Therefore, based on domestic cryptographic algorithms, this article designs a secret key management method for new power system IoT terminals, which is used for identification management of IoT terminals in different application stages. This saves the process of managing, transmitting, and verifying digital certificates, and is more suitable for massive IoT terminals. The large-scale application of identification encryption algorithms in massive power IoT terminals has effectively improved the application efficiency of digital certificates in power perception terminals.