Research on Safety Protection Scheme of Distribution Network Automation

In order to meet the requirements of automatic security protection in smart grid, a security protection scheme for distribution automation based on security encryption chip is proposed. Without affecting the normal operation of the distribution terminal, the characteristics of distribution automation are added, such as wide distribution range and outdoor operation. The LKT4305-GM security chip is used, the security operating system is adopted, the function of sm1, sm2, sm3, sm4 state secret algorithm and the PKI system are realized. PKI power dispatching digital certificate uses digital certificate authentication technology, and based on the encryption technology of national commercial cipher algorithm, it realizes the two-way identity authentication between distribution station and distribution terminal.