An improved method to estimate empirical system parallel resonant frequencies using capacitor switching transient data

This paper presents an improved technique for estimating system parallel resonant frequencies using capacitor switching transient data. Unlike the previous method where the resonant frequency is estimated using the entire waveform trace, the proposed method removes undesired background harmonic distortions and uses only the effective transient part of the disturbance waveform. As such, the proposed method can be applied to data taken from any measurement point including a customer facility with significant nonlinear loads.