2018
DOI: 10.3390/en11081997
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Abstract: High-frequency transformers are the core components of power electronic transformers (PET), whose insulation is deeply threatened by high voltage (HV) and high frequency (HF). The partial discharge (PD) test is an effective method to assess an electrical insulation system. A PD measurement platform applying different frequencies was set up in this manuscript. PD signals were acquired with a high-frequency current transducer (HFCT). For improving the signal-to-noise (SNR) ratio of PD pulses, empirical mode deco… Show more

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Cited by 11 publications
(4 citation statements)
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“…The PTC' is the product of polarization current and measure time, the expression is shown in Equation (9):…”
Section: The Theoretical Analysis Of Power Seriesmentioning
confidence: 99%
See 1 more Smart Citation
“…The PTC' is the product of polarization current and measure time, the expression is shown in Equation (9):…”
Section: The Theoretical Analysis Of Power Seriesmentioning
confidence: 99%
“…test method; III. Partial discharge technique [9,10]; IV. Dielectric response technique including recovery voltage measurement (RVM) [11], the frequency domain spectroscopy (FDS) [12,13] and polarization/depolarization current measurements (PDC) [14][15][16].…”
Section: Introductionmentioning
confidence: 99%
“…The ultrasonic detector is one of the equipment that can be used to inspect the grid for defective insulating devices, and is commonly used by utilities. Partial discharges (PDs) are small discharges that do not completely bridge the insulating surface and cannot be considered as a fault [4,5]. PDs occur in the early stage of leakage current development and may evolve in magnitude and duration till it may in fact lead to a fault.…”
Section: Introductionmentioning
confidence: 99%
“…The electrical insulation of high-voltage power cables is subject to stresses that can result in local dielectric breakdowns that are typically preceded by partial discharge (PD) pulse signals. As such, the online detection of the PD signals of power cables can provide information regarding the locations of weak points or line faults in power distribution systems according to the characteristics of the PD signals obtained at monitoring points, such as arrival times or received signal strengths, and thereby provides an effective means for ensuring the economic and reliable operation of power systems via timely repair [1][2][3][4]. In recent years, the PD pulse signals of line faults have been commonly detected by coupling power cable signals with a high-frequency current sensor (HFCT).…”
Section: Introductionmentioning
confidence: 99%