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전기철도 전차선로 지지애자의 염해지역 열화특성 사례 연구
정호성,박영,Jung, Hosung,Park, Young 한국전기전자재료학회 2019 전기전자재료학회논문지 Vol.32 No.4
In the Airport Railroad, the Yeongjong Bridge has a length of 4,420 m and connects Yeongjong Island with the mainland of Incheon City. The bridge is a two-level structure, consisting of a six-lane road at the upper level and a combination of a road and railroad at the lower level. The environmental conditions for the electric railway come mainly from the salt injury area and a heavy industry zone, and the maintenance cycles are determined differently depending on these conditions. This study analyzed the deterioration characteristics of long rod insulators produced with a movable ceramic bracket and polymer materials in the Yeongjong Bridge section of the Airport Railway operating in the salt injury area according to the material characteristics. Comparison of the corona measurements when the insulators were cleaned at the same time showed that the polymer insulator had a higher insulation performance than the ceramic insulator.
도시철도 전력설비의 노후화 판단을 위한 예측 프로그램 구현
정호성(Ho-Sung Jung),박영(Young Park),강현일(Hyun-Il Kang) 대한전기학회 2013 전기학회논문지 Vol.62 No.6
In this paper, we present a deterioration judgment model of urban rail power equipment using driving history, the frequency and number of failures. In addition, we have developed a deterioration judgment program based on the derived failure rate. A deterioration judgment model of power equipments on metro system was designed to establish how much environmental factors, such as thermal cycling, humidity, overvoltage and partial discharge. The deterioration rate of the transformers followed the Arrhenius log life versus reciprocal Kelvin temperature (hotspot temperature) relation. The deterioration judgment program is linked to the online condition monitoring system of urban railway system. The deterioration judgment program is based on the user interface it is possible to apply immediately to the urban rail power equipment.
배전선로의 고장유형 판별을 위한 적응형 퍼지추론 시스템
정호성(Ho-Sung Jung),신명철(Myong-Chul Shin) 한국지능시스템학회 2001 한국지능시스템학회논문지 Vol.11 No.2
본 논문에서는 배전선로에서 발생하는 여러 고장유형을 판별하기 위해서 적응형 퍼지추론 시스템을 적용하는 새로운 기법을 제시하였다. 배전선로의 고장과 고장유사현상 데이터를 추출하기 위해서 EMTP를 이용하여 RL부하, 아크로부하, 컨버터부하가 있는 배전계통을 구성하고 여러 형태의 고장과 고장유사현상에 대해 시뮬레이션을 하였다. 이를 통해 얻은 전류파형으로부터 기본파성분, 영상분전류, 짝수 고조파성분의 합, 홀수 고조파성분의 합, 그리고 비정규 고조파성분의 합의 5개의 입력변수를 추출하고 학습을 통해서 각 입력변수의 소속함수의 소속도를 자동으로 결정하였다. 이 적응형 퍼지추론 시스템을 이용한 기법을 평가하기 위해서 학습시와 다른 고장상황을 모의하여 얻은 데이터와 실증시험 데이터를 이용하였다. 결과적으로 제안한 기법은 배전선로에서 발생하는 고장유형을 빠르고 정확하게 판별할 수 있었다. This paper proposed the new technique for the fault types classification using adaptive network fuzzy inference system in the distribution lines. To acquire the fault and fault-like data, many fault and fault-like conditions in RL load, arc furnace load and converter load were simulated by EMTP. The 5 input of the fundamental frequency component, zero sequence component current, the sum of even harmonics, the sum of odd harmonics, and the sum of sub harmonics were extracted from these simulated current signals and the degree of the membership function were determined automatically by learning. This technique was tested using another simulation data unused learning and actual experiment high impedance fault data. So, it can classify the fault types in the distribution lines fast and accurately.
DC 정류기 부분방전 신호검출을 위한 SHF 센서의 성능평가
정호성(Ho-Sung Jung),박영(Young Park),나희승(Hee-Seung Na),장순호(Soon-ho Jang) 대한전기학회 2012 전기학회논문지 Vol.61 No.7
Online monitoring system is becoming an essential element of railway traction system for utilized to condition based malignance management and various techniques currently employed in railway traction system. Among the various techniques, it is efficient to detect partial discharge signals by electromagnetic wave detection in order to detect insulation fault of rectifier. Although VHF (Very High Frequency), UHF (Ultra High Frequency) sensors were adopted to detect partial discharge of power facilities, due to characteristics of urban railway, excessive noise occurs from 500 ㎒ to 1.5 ㎓ on UHF bandwidth. In this paper a new measurement system able to monitoring the conditions of power facilities on DC substation in metro was studied and set up. The system uses UHF sensors to measure the partial discharge of the rectifier due to electric faulting and dielectric breakdown. Comparison and estimation for performance of SHF sensor which had devised to detect partial discharge signal of urban railway rectifier has conducted. In order to estimate performance of SHF sensor, we have compared the sensor with existing UHF sensor on sensitivity upon frequency bandwidth generated by pulse generator, and also we have verified performance of the SHF sensor by detection results of partial discharge signal from urban railway rectifier.
정호성(Hosung Jung),한문섭(Moonseob Han),박영(Young Park),정상기(Sanggi Chung),권삼영(Samyoung Kwon),이재봉(Jeabong Lee) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.11
DC traction system generates leakage current because running rails are used in return circuit. And it is very important to estimate the leakage current to the train operation situation. Therefore this paper presents dynamic simulation technique that is very similar to the real operation situation using TPS and PSCAD/EMTDC. For this we model DC traction system included in DC substation, variable feeding circuit model and variable train model. And we extract train location and power using TPS program and use these data for dynamic simulation. Finally we can estimate leakage current to the various operation condition using dynamic simulation.
정호성(Hosung Jung),장동욱(Donguk Jang),한문섭(Moonseob Han),박현준(Hyunjune Park) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
This paper present adaptation method of rail potential test to verify DC railway system's performance and safety. For protection of person and utility caused by rail potential rise, international standard to limit rail potential rise is made and rail potential is tested at the time of plan and construction of DC railway system in foreign country. So, we need rail potential test at the opening time and prepare a continuous monitoring technique of rail potential and a limitation method of rail potential rise. For these, we describe cause of rail potential rise, international standard about rail potential, protection principle, an example of calculation and measurement, and adaptation method for performance test.