This paper presents an alternative method for disturbance analysis in power systems. The method consists of the traditional single frequency analysis method to capture the steady state operation of the system and a wavelet-based transient analysis which is superimposed on the steady state solution and which captures the disturbance. This paper focuses on the second part of the solution method. The method is based on wavelet domain equivalents. We have named this method WBTA (wavelet-based transient analysis). This method can be implemented using any set of orthogonal wavelets. In this paper, we present an implementation with Daubechies wavelets. The results obtained using this method are compared and verified with a numerical time domain analysis method. A concise description of the method is presented followed by examples.