Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Soon-Ryul Nam"'
Publikováno v:
Energies, Vol 17, Iss 4, p 905 (2024)
This paper presents a novel method for the removal of dual decaying DC offsets (DDCOs) to enhance discrete Fourier transform-based phasor estimation. The method proposed in this paper uses the sum of even samples and the sum of odd samples from the i
Externí odkaz:
https://doaj.org/article/697646cd76554f33bd6479dedf1b321f
Publikováno v:
Energies, Vol 17, Iss 4, p 963 (2024)
The reliability and stability of differential protection in power transformers could be threatened by several types of inferences, including magnetizing inrush currents, current transformer saturation, and overexcitation from external faults. The rob
Externí odkaz:
https://doaj.org/article/6890c139bcc441148e9cc783cd4cdc21
Publikováno v:
Energies, Vol 17, Iss 3, p 703 (2024)
This paper introduces a fault location technique for multi-section combined transmission lines, utilizing unsynchronized fault record data. The approach determines the intersection points of the voltage magnitudes computed using the fault current and
Externí odkaz:
https://doaj.org/article/7fec7aa9c9594ff7a040336fc5c93cf3
Publikováno v:
Energies, Vol 16, Iss 3, p 1528 (2023)
Malfunctions in relay protection devices are predominantly caused by current transformer (CT) saturation which produces distortion in current measurements and disturbances in power system protection. The development of deep learning in power system p
Externí odkaz:
https://doaj.org/article/5b03d889ea804616af133dae677ee675
Publikováno v:
IEEE Access, Vol 9, Pp 154731-154739 (2021)
Current transformer saturation has a negative effect on the operation of IEDs, resulting in their malfunction. Here, we present a technique to compensate for saturated waveforms using Bayesian Deep Neural Network (BDNN) comprising Deep Neural Network
Externí odkaz:
https://doaj.org/article/4147964eba1148ce94d3571bf1d32501
Publikováno v:
Energies, Vol 15, Iss 7, p 2644 (2022)
To make a correct decision during normal and transient states, the signal processing for relay protection must be completed and designated the correct task within the shortest given duration. This paper proposes to solve a dc offset fault current pha
Externí odkaz:
https://doaj.org/article/5259765a95a844949c56bbb36b82fde3
Publikováno v:
Energies, Vol 14, Iss 3, p 722 (2021)
We developed an International Electrotechnical Commission (IEC) 61850-based centralized protection scheme to prevent single line-to-ground (SLG) faults in the feeders and busbars of ungrounded distribution systems. Each feeder intelligent electronic
Externí odkaz:
https://doaj.org/article/f7f2d2da5a454e878e9e6f2f8cedea5f
Publikováno v:
Energies, Vol 13, Iss 9, p 2256 (2020)
In this paper, a frequency estimation method based on a revised three-level discrete Fourier transform (DFT) with an estimation delay reduction technique is proposed. First, the input signal passes through a sine filter twice to improve the ability t
Externí odkaz:
https://doaj.org/article/f996fec344e343b1b2165cd0d51c38cd
Publikováno v:
Energies, Vol 13, Iss 4, p 967 (2020)
This paper proposes an IEC 61850-based centralized busbar differential protection scheme, in which data desynchronization between intelligent electronic devices (IEDs) leads to differential current errors. As the differential current errors could res
Externí odkaz:
https://doaj.org/article/cbb9fa6743fa443084b1ac03113c81b2
Publikováno v:
Energies, Vol 8, Iss 9, Pp 9282-9295 (2015)
A two-stage algorithm is proposed for the estimation of the fundamental frequency of asynchronously sampled signals in power systems. In the first stage, time-domain interpolation reconstructs the power system signal at a new sampling time and the re
Externí odkaz:
https://doaj.org/article/545a90807ff94002bb7f5d062f16dad9