High-speed protection method suitable for T-connection type sending-out line of new energy station and application of high-speed protection method

The high-speed protection method suitable for the new energy station T-connection type sending-out line comprises the following steps: aiming at the new energy station T-connection type sending-out line, installing the same protection device on each section of line, measuring the three-phase current of the side, carrying out compressed sensing on the three-phase current of the side to obtain a compressed signal, and transmitting the compressed signal to the other two sides through an optical fiber channel, the compressed signal is decompressed to obtain a reconstructed current after being received; the protection device superposes the three-phase short-circuit current of the two new energy stations, Morl et complex wavelet transform is carried out on the superposed current of the new energy stations and the system side current to obtain a wavelet coefficient matrix, and dimensionality reduction is carried out on the wavelet coefficient matrix by using a principal component analysis method to obtain a feature