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Research on the wave head detecting algorithm based on Kalman filtering

In order to solve the problem how to detect the wave head for traveling-wave based fault location when fault occurs, a new kind of wave head detecting algorithm for precise positioning which based on Kalman filtering is proposed. Model of voltage traveling wave is set up according to the actual characteristics of traveling wave signal. Recursion method of Kalman Altering is used to process the signal which contains fundamental component and harmonic component in the model. Getting the filter results and wave head signal can be achieved by subtracting the result from the original signal. The single-phase grounding model is established, then use this method to extract the wave head signal from the transient travelling wave signal in this model. Simulation results show that, the method proposed can effectively detect the wave head, so it has promoted value.