Electric power alternating current-direct current (AC/DC) power source crosstalk computer monitoring protective device

The invention discloses an electric power alternating current-direct current (AC/DC) power source crosstalk computer monitoring protective device which can be applied to different AC/DC power source systems, can detect a crosstalk state and an insulation state, and can prevent serious large-area power outage accidents such as damage of electrical equipment, relay protection misoperation, halt of an electric generator, and high-voltage breaker tripping from happening. The electric power AC/DC power source crosstalk computer monitoring protective device comprises a master control central processing unit (CPU), an analog-digital (A/D) converting unit, a memory cell, an upper communication unit, a relay unit, a signal modulation unit, and a signal acquisition unit, wherein the A/D converting unit, the memory cell, the upper communication unit and the relay unit are in electric connection with the master control CPU, the signal modulation unit is connected with the A/D converting unit, and the signal acquisition unit is connected with the signal modulation unit. Signals collected by the signal acquisition unit are transmitted to the master control CPU after passing through the signal modulation unit and the A/D converting unit. The master control CPU comprises a signal sampling calculating module, a judgment and analysis module and a communication processing module.