Application of squaring — Low pass filtering — Square rooting method for enveloping partial discharge waveform

Khayam, Umar; Zaeni, Arpan

doi:10.1109/icevt.2017.8323536

Cited by 2 publications

(1 citation statement)

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“…Second, the square root of the signal is taken to eliminate the scale distortion resulting from the squaring of the signal. The advantage of this method is that it is simple and easy to implement [24][25][26][27].…”

Section: Squaring and Low-pass Filtering And Envelope Detectionmentioning

confidence: 99%

Microgrid Protection Strategy Based on the Autocorrelation of Current Envelopes Using the Squaring and Low-Pass Filtering Method

et al. 2020

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To resolve the protection issues caused by high penetration of distributed energy resources, this paper proposes an efficient protection scheme for microgrids based on the autocorrelation of three-phase current envelopes. The proposed strategy uses a squaring and low-pass filtering approach for evaluating the envelope of the current signal. Then, the variance of the autocorrelation function is used to extract the hidden information of the distorted envelope to detect the fault signatures in the microgrid. Furthermore, the reactive power is used for determining the fault direction. The performance of the proposed protection scheme was verified on a standard medium-voltage microgrid by performing simulations in the MATLAB/Simulink environment (Version: R2017b). The proposed scheme was shown to be easy to implement and have good performance under looped and radial configuration for both grid-connected and islanded operation modes. The simulation results showed that the scheme could not only detect, locate, classify, and isolate various types of short-circuit faults effectively but also provide backup protection in case of primary protection failure.

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Section: Squaring and Low-pass Filtering And Envelope Detectionmentioning

confidence: 99%