Aiming at the security and credibility requirement of power protection equipment,power spectrum estimate algorithm which based on multiple orthonormal tapers is researched and modified in this paper.

• 针对电力保护设备的安全性和可信赖性指标要求,研究了基于多正交窗分析的功率谱估计算法,并从计算量的角度出发对算法进行了改进。