According as the character of EHV transmission line fault transient current, based on the time and frequency localization character of wavelet transform.

• 基于超高压 (EHV)输电线路故障暂态电流的特点和暂态保护的基本原理 ,充分利用小波分析的时频局部化特点 ,建立了基于小波分析的暂态保护启动判据和跳闸判据。