The Application Study On Fiber Allowing Longitudinal Protection

The fiber as the communication media of relay protection has the characteristics of anti-super high voltage, anti the interferences of lightning, insulation to the electric field and low-loss. With the gradual perfection of the power fiber network, the application of the fiber protection is widely improved. Fiber pilot protections of artesian and allowable are developed from the present high frequency pilot protections of artesian and allowable, to substitute the high frequency channel by stability and reliability fiber channel, for improving the reliability of the protection action. Because of the similarity of the principle between the fiber pilot protections of artesian and allowable and the high frequency protection, after the laying of fiber channel, the device can be accessed by changing the light transceiver, which has the feature of easily transformation.