The carrierchannel is an important component of high frequency protection, and whether it is normal related to the protection action correct or not.
高频通道作为高频保护的重要组成部分，其是否正常关系到保护能否正确动作。
2
When processing digital base-band, the signal of pilot-frequency was taken out from normal carrierchannel and it would be used for transmitting pseudo pilot-frequency.
在数字基带处理时，从正常载频信道中提取出导频信号，用于伪导频的发射。
3
This paper brings forward a whole new scheme of three-phase adaptive reclosure, which uses the carrierchannel and its signals to distinguish transient faults and permanent faults.