Abstract
This letter sets out to describe the first results of the design process that will lead to a new on-line partial discharge location method based on Electromagnetic Time Reversal theory and using the Transmission Line-Matrix method. A description of the basic steps of the method under design is given together with the modeling procedure used to describe time inverted signal propagation. Finally, the ability of the method to locate partial discharges on power cables both using two observation points and a single observation point is proved in simulation.
Highlights
A MONG all forms of energy, electricity plays a central role in the global challenge of climate change and the shift to clean growth
SIMULATION RESULTS To give an illustration of the proposed method, simulations have been performed based on the scheme in Fig. 3: that is, a transmission line formed of a homogeneous cable of length l = 100 m, connected to impedances Z1 and Z2 with Z1 = Z2 = 100 k
It can be observed that the voltage at the guessed PD locations (GPDLs) that corresponds to the Partial Discharge (PD) source is higher than the voltage at the other GPDLs
Summary
A MONG all forms of energy, electricity plays a central role in the global challenge of climate change and the shift to clean growth. RAGUSA et al.: ELECTROMAGNETIC TIME REVERSAL METHOD TO LOCATE PARTIAL DISCHARGES of the cable detects two pulses, the incident wave and the reflected one from the other cable end. ToA methods require a precise determination of the signal onset time, which is highly sensitive to noise Another major challenge in accurately locating PDs is the presence of electromagnetic interference (EMI), addressed using wavelet transform techniques requiring significant computational effort [6]. Voltage and current waves are evaluated using the TLM method, chosen for its flexibility, high efficiency, and its numerical stability This voltage is applied to one node of the TLM model, between points a and b of Fig. 2, and its propagation along the cable is evaluated using eqs. (3-4)
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