Research On ADN Secure Communication Protocol Based On SM2 Serial Algorithms

As the energy crisis and environment pollution are worsening,efficiently developing and utilizing distributed renewable energy has become an important strategic move for sustainable economic and social development in China.Active Distribution Network(ADN)is a new solution for the power system to deal with the problem of distributed energy grid connection in distribution network.Secure and efficient information communication technology plays an important role in the reliable operation of ADN.However,due to the extensive use of distributed energy sources and wireless communication technology,ADN tends to face information security threats that are even more serious than that of traditional distribution network.For this reason,SM serial algorithm with autonomous intellectual property right is proposed to apply in ADN.Firstly,we design the information security communication protocol.Among this protocol,the broadcast protocol based on symmetric key solves the problems of poor computing power,high real-time requirement and broadcast authentication by difference key calculation.And the secure communication protocol based on asymmetric key authentication prevents Denial of Service(DOS)by pre-authentication.We also use SM2 elliptic curve algorithm to improve their security.Secondly,we write calculation programs and do some simple function tests with actual communication processes of ADN.The real-time performances are elaborated with relevant security chips.Finally,we make analysis and comparison of protocol security performance.For the problem of poor real-time performance of SM2 algorithm,an improvement program based on pre-calculation is proposed to reduce the delay in asymmetric key encryption.