Abstract: In view of the problem that the dangerous points in transmission lines affect the stability of power

system，the technology of identifying and controlling the transmission line dangerous points based on multidimensional perception was studied，which can control the transmission line risk in time，reduce noise and

effectively identify the location of the dangerous points. Firstly，the multi-dimensional perceptual data model was

constructed by using space vector theory，and the difference parameters in the circuit were detected by wireless

sensor network，and the transmission line dangerous points were identified by vector operation. Then，the cross

sliding window was introduced into the multi-dimensional perceptual data model to improve the recognition

accuracy and speed of dangerous points from the space and time. Based on the results of dangerous point

identification，interpolation method was used to calculate the shortest matrix among dangerous points to obtain the shortest transmission path，control the dangerous line and the sub dangerous line which will cause great active power flow changes，thus，the control of transmission line dangerous point was realized. The experimental results show that the process of dangerous point identification is less delay，the accuracy of the dangerous points identification is high and it is not easy to be interfered by the location and noise of the dangerous points.

      Key words: multi-dimensional perception； transmission line； dangerous point； identification control

technology；space vector