Search Results - "Soon-Ryul Nam"

Fourier Transform-Based Modified Phasor Estimation Method Immune to the Effect of the DC Offsets by Sang-Hee Kang, Dong-Gyu Lee, Soon-Ryul Nam, Crossley, P.A., Yong-Cheol Kang

“…This paper proposes a Fourier transform-based modified phasor estimation method to eliminate the adverse influence of the exponentially decaying dc offsets…”
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Power Scheduling of Distributed Generators for Economic and Stable Operation of a Microgrid by Ahn, Seon-Ju, Nam, Soon-Ryul, Choi, Joon-Ho, Moon, Seung-Il

“…This paper is concerned with the power dispatch problem of distributed generators (DGs) for optimal operation of a microgrid. The objective is to minimize the…”
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Phasor Estimation in the Presence of DC Offset and CT Saturation by Soon-Ryul Nam, Jong-Young Park, Sang-Hee Kang, Kezunovic, M.

“…A hybrid algorithm for phasor estimation is proposed that is immune to DC offset and current transformer (CT) saturation problems. The algorithm utilizes…”
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Control of a ULTC Considering the Dispatch Schedule of Capacitors in a Distribution System by Park, Jong-young, Nam, Soon-ryul, Park, Jong-keun

“…This paper proposes a coordinated control method for an under-load tap changer (ULTC) with switching capacitors in distribution systems to reduce the operation…”
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Deep Learning-Based Algorithm for Internal Fault Detection of Power Transformers during Inrush Current at Distribution Substations by Key, Sopheap, Son, Gyu-Won, Nam, Soon-Ryul

“…The reliability and stability of differential protection in power transformers could be threatened by several types of inferences, including magnetizing inrush…”
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Power-Sharing Method of Multiple Distributed Generators Considering Control Modes and Configurations of a Microgrid by AHN, Seon-Ju, PARK, Jin-Woo, CHUNG, Il-Yop, MOON, Seung-Il, KANG, Sang-Hee, NAM, Soon-Ryul

“…This paper describes the active power and frequency-control principles of multiple distributed generators (DGs) in a microgrid. Microgrids have two operating…”
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A Fault Location Algorithm for Multi-Section Combined Transmission Lines Considering Unsynchronized Sampling by Lak, Peng Y., Ha, Kwang-Min, Nam, Soon-Ryul

“…This paper introduces a fault location technique for multi-section combined transmission lines, utilizing unsynchronized fault record data. The approach…”
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A Fault Location Algorithm Based on Circuit Analysis for Untransposed Parallel Transmission Lines by KANG, Sang-Hee, AHN, Yong-Jin, KANG, Yong-Cheol, NAM, Soon-Ryul

“…This paper proposes a fault-location algorithm for ultra-high-voltage untransposed parallel transmission lines that only use the voltages and currents at the…”
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A Novel Method for Removal of Dual Decaying DC Offsets to Enhance Discrete Fourier Transform-Based Phasor Estimation by Sok, Vattanak, Kim, Su-Hwan, Lak, Peng Y., Nam, Soon-Ryul

“…This paper presents a novel method for the removal of dual decaying DC offsets (DDCOs) to enhance discrete Fourier transform-based phasor estimation. The…”
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Fast Detection of Current Transformer Saturation Using Stacked Denoising Autoencoders by Key, Sopheap, Ko, Chang-Sung, Song, Kwang-Jae, Nam, Soon-Ryul

“…Malfunctions in relay protection devices are predominantly caused by current transformer (CT) saturation which produces distortion in current measurements and…”
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Deep Neural Network-Based Removal of a Decaying DC Offset in Less Than One Cycle for Digital Relaying by Sok, Vattanak, Lee, Sun-Woo, Kang, Sang-Hee, Nam, Soon-Ryul

“…To make a correct decision during normal and transient states, the signal processing for relay protection must be completed and designated the correct task…”
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An Accurate CT Saturation Classification Using a Deep Learning Approach Based on Unsupervised Feature Extraction and Supervised Fine-Tuning Strategy by Ali, Muhammad, Son, Dae-Hee, Kang, Sang-Hee, Nam, Soon-Ryul

“…Current transformer (CT) saturation is one of the significant problems for protection engineers. If CT saturation is not tackled properly, it can cause a…”
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IEC 61850-Based Centralized Protection against Single Line-To-Ground Faults in Ungrounded Distribution Systems by Nam, Soon-Ryul, Ko, Woong-Hie, Key, Sopheap, Kang, Sang-Hee, Lee, Nam-Ho

“…We developed an International Electrotechnical Commission (IEC) 61850-based centralized protection scheme to prevent single line-to-ground (SLG) faults in the…”
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A Frequency Estimation Method Based on a Revised 3-Level Discrete Fourier Transform with an Estimation Delay Reduction Technique by Kang, Sang-Hee, Seo, Woo-Seok, Nam, Soon-Ryul

“…In this paper, a frequency estimation method based on a revised three-level discrete Fourier transform (DFT) with an estimation delay reduction technique is…”
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Value-based radial distribution system reliability optimization by Sohn, J.-M., Nam, S.-R., Park, J.-K.

“…The protective devices and switches play an important role in the reliability of electrical distribution systems by minimizing the impact of interruption. In…”
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IEC 61850-Based Centralized Busbar Differential Protection with Data Desynchronization Compensation by Song, Myeong-Hoon, Kang, Sang-Hee, Lee, Nam-Ho, Nam, Soon-Ryul

“…This paper proposes an IEC 61850-based centralized busbar differential protection scheme, in which data desynchronization between intelligent electronic…”
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Bayesian Deep Neural Network to Compensate for Current Transformer Saturation by Key, Sopheap, Kang, Sang-Hee, Lee, Nam-Ho, Nam, Soon-Ryul

“…Current transformer saturation has a negative effect on the operation of IEDs, resulting in their malfunction. Here, we present a technique to compensate for…”
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Real-Time Estimation of Power System Frequency Using a Three-Level Discrete Fourier Transform Method by Nam, Soon-Ryul, Kang, Seung-Hwa, Kang, Sang-Hee

“…This paper proposes a three-level discrete Fourier transform (DFT) method to provide an accurate estimate of power system frequency in real time. The first…”
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Adaptive Phasor Estimation Algorithm Based on a Least Squares Method by Kim, Nam, Kang

“…This paper proposes an adaptive phasor estimation algorithm based on a least square method that can suppress the adverse effect of an exponentially decreasing…”
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A Study on Deep Neural Network-Based DC Offset Removal for Phase Estimation in Power Systems by Sun-Bin, Kim, Sok, Vattanak, Sang-Hee, Kang, Nam-Ho, Lee, Soon-Ryul Nam

“…The purpose of this paper is to remove the exponentially decaying DC offset in fault current waveforms using a deep neural network (DNN), even under harmonics…”
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