Four kinds. (1) The substation operation and maintenance station shall formulate an annual training plan and organize its implementation. (2) The substation operation and maintenance station shall establish training files, and all training records shall be stored in personal training files. (3) The operation and maintenance personnel of the substation operation and maintenance station shall conduct annual technical assessment, and determine the technical level of the operation and maintenance personnel according to the assessment results. Technical assessment is based on the comprehensive evaluation of knowledge, ability and practical work ability. (4) Training standards for substation operation and maintenance personnel.