• 제목/요약/키워드: Heavy industry

검색결과 1,028건 처리시간 0.021초

북한의 중공업 부문 대기오염물질 배출량 추정 (Estimation of air pollutant emissions from heavy industry sector in North Korea)

  • 이영원;김용표;여민주
    • 한국입자에어로졸학회지
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    • 제17권4호
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    • pp.133-148
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    • 2021
  • This study aims to estimate the amount of air pollutants emitted from heavy industry facilities in North Korea. To compare the emission in 2017 from the heavy industry sector in North Korea with South Korea, the heavy industry sector was classified with the South Korean classification (Matching Heavy Industry sector) and air pollutant emissions by Matching Heavy Industry sector in North Korea were estimated. The CO, NOx and SOx emissions of Matching Heavy Industry sector in North Korea are 22%, 73%, and 31% of the emission in South Korea, respectively. The air pollutant emissions in the Matching Heavy Industry sector in North Korea for CO, NOx and SOx were 0.6%, 124%, and 24% of the total air pollutant emission in North Korea estimated from EDGAR, respectively. As for the distribution of emissions by administrative district of the Matching Heavy Industry sector in North Korea, NOx was concentrated in the western part of North Korea, and CO and SOx emissions were concentrated in Hamgyong-bukto.

산업기기 엔진속도제어용 HB형 스텝모터 개발 (DEVELOPEMENT OF HB TYPE STEP MOTOR FOR ENGINE SPEED CONTROL USAGE OF INDUSTRIAL MACHINES)

  • 이종인;이정일;배동진;박현준;김종구;최상덕;한송엽
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 하계학술대회 논문집 A
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    • pp.229-231
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    • 1994
  • In recent years, as the industry has been highly developed and precised, its driving and control system have been changed, what is more, revolutionized. The requirements of these change are more accuracy, more high efficiency, more miniaturized size and more servo functions. Step motor has been adopted for driving servo systems, because of easier controllability, open-loop control, high position accuracy at low speed. In this paper, we deal with developing step motor system, and describe the procedure that contains design, analysis. testing characteristics.

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PWM 콘버터와 공진형 인버터를 채용한 UPS 개발 (The development of an UPS using PWM Converter and Resonant Inverter)

  • 민병권;유승표;백병산;김연풍;신현주;김동욱;유동욱;백주원
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1996년도 하계학술대회 논문집 A
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    • pp.550-552
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    • 1996
  • In order to develop a noble Uninterruptible Power Supply(UPS), we designed and manufactured the UPS using the PWM converter and the Resonant DC Link Inverter. This paper describes the power circuits, the key techniques, the control and monitoring unit of the developed UPS. Finally, using the UPS we verified the superiority through the type test.

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대용량 유입변압기의 온라인 진단시스템 적용연구 (Field Test of On-line Monitoring System for Oil-filled Power Transformers)

  • 이창용;김용한;김남해;김정한;윤자홍;남극채
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 하계학술대회 논문집 C
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    • pp.1644-1646
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    • 2003
  • This paper presents recent studies on the on-line insulation monitoring and diagnostic systems for transformers developed by HHI. Sufficiently high sensitivity and accuracy for practical use were achieved for the system, combined with communication networks to provide an on-line remote monitoring system. Several alarm criteria are formulated to enable a superimposed monitoring system to perform decisive action. The reasons for monitoring the condition and maintaining the health of electrical apparatus were discussed. The experience at the fields and the criteria for the judgment are also discussed in detail.

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전력용 변압기 예방진단 시스템의 실 계통 적용 연구 (A study on field test of diagnostic Monitoring System for Power Transformers)

  • 김용한;이창용;황보승욱;신용택;박귀철;박균수
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 춘계학술대회 논문집 전기설비전문위원
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    • pp.91-93
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    • 2004
  • This study presents recent trends on the on-line monitoring and diagnostic systems for oil-immersed transformers. Specially, our system on Yeo Su thermal power plant is introduced for high sensitivity and accuracy of ours. It is combined with communication networks to provide an on-line remote monitoring system. Several alarm criteria are formulated to enable a superimposed monitoring system to perform decisive action. The reasons for monitoring the condition and maintaining the health of electrical apparatus were discussed. The experience at the fields and the criteria for the judgment are also discussed in detail.

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선박발전기용 디지털 AVR 개발 (Development of the Digital AVR for Ship Generator)

  • 김태완;김승환;이수병;송석현;이선재;김명찬;이상동
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 하계학술대회 논문집 B
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    • pp.828-830
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    • 2003
  • AVR은 동기발전기의 출력전압을 부하변동에 관계없이 일정하게 제어하며 발전기 및 시스템 보호를 위한 각 종 제어 알고리즘을 구비하고 있다. 종래의 아나로그타입 AVR은 제어설정이 불편하고 제어신뢰성이 떨어지기 때문에 점차 디지털 타입으로 교체되고 있다. 본 연구는 선박발전기에 적용하기 위한 디지털 AVR 개발에 관한 것이다. TI사의 TMS320LF2407 CPU를 사용하여 제어 H/W를 개발했으며, 과여자/저여자제어, Droop제어, 무부하/역률제어 등 다양한 제어기능을 S/W로 구비하여 부하에 따른 적용의 유연성을 높였다. 그리고 전력회로는 IGBT를 사용하여 고속 스위칭 제어함으로써 SCR 방식에 비해 제어 속응성을 개선하였다. 개발 된 제품은 AVR, 직류전원공급장치 및 부하나 계통의 사고시 보호를 위한 전류부스트(CBS)기능을 포함하고 있다.

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고성능 벡터제어 유도기 구동장치의 모델링과 시뮬레이션 (Modeling and Simulation of A High Performance Vector Controlled Induction Motor Drive)

  • 김종구;최욱돈;손진근;이종찬;김진식
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 하계학술대회 논문집 A
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    • pp.366-368
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    • 1994
  • This paper deals with the vector control that control of torque and speed of the induction motor using field-oriented control method. Rotor flux is estimated using the indirect sensing method based on the rotor circuit equation in the synchronously rotation reference frame, and slip angle and rotor position are caculated from rotor angular velocity and stator current. Through modeling and digital simulation with a voltage source inverter, it is shown that the proposed scheme gives good static and dynamic performance to the induction motor drive.

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선박의 docking 시 반력 계산 및 구조 안전성 평가법에 관한 연구 (A Study on Structural Safety Assessment for Docking Condition)

  • 서용석;허기선;정성욱;박승문;조현규;전민성
    • 대한조선학회 특별논문집
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    • 대한조선학회 2006년도 특별논문집
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    • pp.89-96
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    • 2006
  • The objective of this paper is to find out a reasonable method for docking analysis of ships. The characteristics of reaction force distribution under docking condition are investigated by carrying out parametric study. To assess the allowable reaction force on keel block from structural strength point of view, two kinds of structural assessment methods are proposed in accordance with expected collapse pattern. In order to verify the proposed method, linear buckling and elasto-plastic large deflection analyses of typical double bottom structure are carried out and the results are compared.

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