Abstract
In the electrical power system, the CT is to be away from the far situation with two sides data processing system. In the project the common used simple method is through the wire coupling direct transmission CT,and the two sides electrical currents forms in the closed path. This method is free simple. The cost is low easy to realize, but because the transmits is too far. The signal is easy disturbed to cause the measuring accuracy to reduce. If the transmission wire presents abruption will create the CT two sides openings to causes the electric current signaling interrupt.The serious are to cause CT to burn down because of the two sides openings. In order to guarantee the CT security and the data reliably,that is used the proposed digital transmission method, The designed long range data transport unit, This equipment to by transmits and receives two parts of the composed between 0.2 parts to use without the line number biography. Even if this installment is transmission that the line interrupt will not affect CT, thus has guaranteed the CT normal operation gave passed on the communication which to used the monolithic integrated circuit without the line number to carry on the long-distance range digit transmission ,For received practical plan to the electrical power system ,the two sides electric currents of the CT is to cause CT not to burn down.Because of the two sides openings, antijamming ability, the measuring accuracy is high, and could provide A/D transformation result directly, which returned to original state the signal, This installment suited applies in the electric power parameter microcomputer supervisory system.
Key words: Monolithic integrated circuit; Wireless data communication; A/D; CT.
