On the basis of the RMS definition a method for measuring TRMS of distortion sinusoid or non-sinusoid is introduced in the paper.

• 介绍了一种基于交流信号有效值定义测量失真正弦波或非正弦波真有效值的方法,解决了平均值法在测量失真正弦波时引起显著测量误差的问题。