• 제목/요약/키워드: Degradation diagnosis

검색결과 237건 처리시간 0.031초

지능형 절연열화센서 개발 (Development of Intelligent Insulation Degradation Sensor)

  • 김이곤
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 2002년도 추계학술대회 및 정기총회
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    • pp.158-161
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    • 2002
  • Many methods were proposed for insulation degradation diagnosis to High voltage and capacity Transformer in live. IDD is difficult by those methods because insulation degradation circumstances and characteristics of electrical plant are different with other Therefore, it is necessary to design diagnosis algorithms fitting for each. In this paper, We develop IIDS that used diagnosis algorithm with fuzzy model and hardware with MCU.

Design of Intelligent Insulation Degradation Sensor

  • Kim, Yi-Gon
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제2권3호
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    • pp.191-193
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    • 2002
  • Insulation aging diagnosis system provides early warning in regard to electrical equipment defects. Early warning is very important in that it can avoid great losses resulting from unexpected shutdown of the production line. For solving this problem, many researchers proposed a method that diagnose power plant by using partial discharge. In this paper, we design the intelligent sensor to diagnose insulation degradation state that uses a Microprocessor and Al. Proposed sensor has MCU that is used to diagnose insulation degradation and communicate with main IDD system. And we use a fuzzy model to diagnose insulation degradation.

열열화된 PVC 케이블의 부분방전 진단 (Partial Discharge Diagnosis of Thermal Degradated PVC Cable)

  • 송기태;이성일
    • 한국전기전자재료학회논문지
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    • 제24권3호
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    • pp.208-214
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    • 2011
  • In this thesis, the partial discharge according to applied voltage and variations of cross-sectional area and length of the conductor related to general condition for using cable was measured in order to study degradation diagnosis for 2-Core cable of the PVC insulator used in industrial fields for other safety installations. Also the thermal degradation conditions under various installation circumstances of cables were studied by assuming degradation conditions with each different degradation rate (50%, 67%, 100%) such as variation in degradated temperature, thermal exposure time, normal state, partially degradated state and overall degradated state for thermal degradation diagnosis. The quantity of electric discharge (V-Q) according to applied voltage was measured for measurement of inception voltage and extinction voltage. The quantity of electric discharge and the number of electric discharge (Q-N) were measured with applied voltage kept constantly. In addition, pictures were taken using SEM (scanning electron microscope) to compare the surface of external insulator to degradated state of internal insulator according to thermal degradation temperature and also compare the surface of external insulator to degradated surface state of internal insulator according exposure time of cables to thermal stress.

철도차량 견인전동기의 가속열화수명평가 기술현황 (A technology State of Accelerating Degradation and Life Estimation on the Traction Motor for Railway Rolling Stock)

  • 왕종배;김기준;최영찬
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2000년도 제2회 학술대회 논문집 일렉트렛트 및 응용기술전문연구회
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    • pp.25-28
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    • 2000
  • In this paper, the technology for accelerating degradation & life estimation on the traction motor was introduced with the stator form-winding sample coils of the 200 Class insulation system The accelerative degradation was performed in 10 cycles, which were composed of thermal stress, fast rising surge voltage, vibration, water immersion and overvoltage applying. After aging of 10 cycles, condition diagnosis test such as insulation resistance & polarization index, capacitance & dielectric loss and partial discharge properties were investigated in the temperature range of $20{\sim}160^{\circ}C$. Relationship between degradation conditions and diagnosis results were analyzed to find an dominative degradation factor at the end-life point

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전기철도용 견인전동기의 복합가속열화 상태진단에 관한 연구 (A Study on the Complex Accelerating Degradation and Condition Diagnosis of Traction Motor for Electric Railway)

  • 왕종배
    • 한국전기전자재료학회논문지
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    • 제15권1호
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    • pp.93-101
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    • 2002
  • In this study, the stator form-winding sample coils based on silicone resin and polyimide were made for fault prediction and reliability estimation on the C-Class(200$\^{C}$ ) insulation system of traction motors. The complex accelerative degradation was periodically performed during 10 cycles, which was composed of thermal stress, fast rising surge voltage, vibration, water immersion and overvoltage applying. After aging of 10 cycles, the condition diagnosis test such as insulation resistance '||'&'||' polarization index, capacitance '||'&'||' dielectric loss and partial discharge properties were investigated in the temperature range of 20 ∼ 160$\^{C}$. Relationship among condition diagnosis tests was analyzed to find a dominative degradation factor and an insulation state at end-life point.

견인전동기의 복합가속열화 상태진단에 의한 고장예측 및 신뢰성 평가 (Fault Prediction & Reliability Estimation of the Traction Motor by the Complex Accelerating Degradation and Condition Diagnosis)

  • 왕종배;김명룡
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2000년도 하계학술대회 논문집
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    • pp.763-766
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    • 2000
  • In this paper, stator form-winding sample coils based on silicone resin and polyimide were made for fault prediction and reliability estimation on the 200 Class insulation system of traction motors. The complex accelerative degradation was performed by periods during 10 cycles, which was composed of thermal stress, fast rising surge voltage, vibration, water immersion and overvoltage applying. After aging of 10 cycles, condition diagnosis test such as insulation resistance & polarization index, capacitance & dielectric loss and partial discharge properties were investigated in the temperature range of 20∼160$^{\circ}C$. Relationship among condition diagnosis test was analyzed to find an dominative degradation factor and an insulation state at end-life point.

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화력발전설비 진단기술 및 전문가 시스템개발에 관한 연구 (A study on the developing the diagnosis technology and expert system in fossil power plant)

  • 백영민;정희돈;신은주
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 동계학술발표대회 논문집
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    • pp.642-648
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    • 2008
  • In order to analyze the causes of fossil power plant facilities due to a degradation and corrosion, artificial degraded materials composed of the facilities were manufactured. Various experiment were performed based on mechanical test, microstructure observation, hardness test, electrochemical potentiokinetic reactivation test(EPR) and corrosion scale thickness measurement test. The master curves were write out using Larson-Miller parameter to evaluate the degree of degradation with the above diagnosis methods. These data were applied to materials database of fossil power plant diagnosis. Finally expert system on the fossil power plant diagnosis was developed using the master curves and diagnosis algorithms.

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신경회로망을 이용한 절연 열화진단에 관한 연구 (A Study on Insulation Degradation Diagnosis Using a Neural Network)

  • 박재준
    • 정보학연구
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    • 제2권2호
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    • pp.13-22
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    • 1999
  • 본 논문에서, 부분방전 메카니즘을 진단하고 그리고 신경망을 도입하여 수명을 예측하기 위한 기초연구로서, 온라인상에서 자동진단을 제안했다. 제안한 방법에서 우리는 음향방출 감지시스템과 그리고 펄스 수와 펄스진폭에 의해서 정량적인 통계파라메타를 사용하였다. 통계적인 파라메타인 가령, 무게중심(G)와 방전분포 경도(C)를 이용하였고 그리고 초기단계와 중기단계에 대해서 분석하였다. 정량적인 통계파라메타들은 신경망에 의해서 학습되어졌다. 초기단계에 의해서 수명예측과 절연열화의 진단이 이루어졌다. 열화가 진행하는 동안 신경망 학습을 통한 휼륭한 진단능력이 있음이 근본적으로 드러났고, 신경망이 부분방전에 있어서 절연진단 및 수명예측을 위해서 적절하다는 것이 증명되었다.

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표면열화진단을 위한 적외선카메라의 응용 (The Application of IRR-Camera for the Diagnosis of Surface Degradation)

  • 임장섭;정승천;이진
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2001년도 춘계학술대회 논문집 센서 박막재료
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    • pp.61-65
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    • 2001
  • The conventional tracking testing as IEC-60587 is widely used in surface aging measurement of outdoor insulator because those testing can carry out very short time in Lab-testing. Also IEC-60587 testing is able to offer the standard judgement of relative degradation level of outdoor HV machine/system. Therefore it is very useful method compare to previous conventional tracking testing method and effective Lab-testing method. But surface discharges(SD) have very complex characteristics of discharge pattern so it is required estimation research to development of precise analysis method. In recent, the study of IRR-camera is carrying out discover of temperature of power equipment through condition diagnosis and system development of degradation diagnosis. In this study, SD occurred from procelain insulator, used 22.9[KV] distribution, is measured with partial temperature distribution in real time, the degradation grade of SD is analyzed through produced patterns in SD concentration according to applied time.

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병렬 연결된 리튬이온전지 셀의 비파괴 전기화학적 열화상태 진단 (Degradation diagnosis of parallel-connected lithium-ion battery cells via non-constructive electrochemical approach)

  • 이가람;정지윤;김용태;최진섭
    • 한국표면공학회지
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    • 제55권4호
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    • pp.231-235
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    • 2022
  • As environmental pollution becomes more serious, the demand for electric vehicles (EVs) and lithium-ion batteries for electric vehicles is rapidly increasing worldwide. Accordingly, the amount of waste batteries is also increasing, and a technology for recycling and reusing them is required. In order to reuse a used battery, it is necessary to non-destructively diagnose the deterioration condition of the battery. Therefore, in this study, we investigate the diagnosis of degradation for parallel-connected lithium-ion battery cells through non-constructive electrochemical approach. As the number of parallel-connected cells increased, in addition to linear degradation, abrupt step-like degradation occurred, which is attributed to the predominant degradation of specific cells. In addition, it is confirmed that deteriorated cells among multiple cells can be distinguished through a simple measurement of open circuit voltage (OCV).