| Based on the importance of introduction of electric equipment protection and analysis of faults character of comprehensive machinery electric equipment, micro-electronics and microcomputer technology is applied to protection and referred to mature experience of microprocessor based protective relay in electric power system. The thesis gives an intelligence way to apply to running of comprehensive machinery electric equipment under ground, which integrates protection, control, measure, display, arrangement, auto-diagnosis and communication. Protection system generally solves the possible faults of comprehensive machinery electric equipment. In order to upgrade the software program, it is modularized configuration. For the especial electromagnetic environment under ground, the anti-jamming problem of protective equipment is researched. The equipment will increase the reliability of the comprehensive machinery electric equipment, and provide a new thoughts to realize power supply automatization under ground.
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