• Title/Summary/Keyword: data generator

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Rotordynamic design of Pulsed Generator (펄스발전기의 로터다이나믹 설계)

  • Kim, Yeong-Chun;Park, Chul-Hyun;Park, Hei-Joo;Moon, Tae-Sun
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2002.11b
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    • pp.805-809
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    • 2002
  • The support bearing requires high DN to raise specific energy efficiency for the state of the art rotating machine with high speed. Especially for the system has a big rotor(670 kgf) with high speed(about one million DNs) such as the pulsed generator, the selection of the bearing and lubrication method are very important. So the study for the critical speed of hollow rotor as well in accordance with high speed rotor and a full analysis are needed for rotor bearing system. This paper describes the analysis for rotor bearing system of pulsed generator compared with experimental data. The bearing and lubrication method are discussed as well with experimental data.

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Predictive Maintenance System using Condition Monitoring System of Hydro-turbine Generator (수차발전기 상태진단시스템을 이용한 예지보전체계)

  • Kim, Eung-Tae;Ko, Sung-Ho;Kim, Hyun;Jeong, Yong-Chae;Choi, Seong-Pil
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2007.05a
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    • pp.453-456
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    • 2007
  • The purpose of this study is to explain the importance of Vibration Monitoring Device by introducing an example of Predictive Maintenance System using Condition Monitoring System of Hydro-turbine generator. Confirming vibration of generation equipment is commissioning procedure during equipment completion for checking guaranteed items. Data from Generator output range are used to determine output band to continue the performance of equipment. The Vibration Monitoring System is not absolute method of maintenance, but if it is used well with expert, it will be visible, data-analyzed, scientific maintenance more than others. And also, Condition Monitoring System is very important for remote controlled small hydro-power plant although most of it is installed in Large hydro-power plant.

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A Study on the Typical Value of Generator Control Systems for Power System Stability Analysis (전력계통 안정도해석용 발전기제어계의 대표값선정에 관한 연구)

  • Moon, Young-Hwan;Seong, Ki-Chul;Kwon, Tae-Won;Song, Soek-Ha
    • Proceedings of the KIEE Conference
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    • 1992.07a
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    • pp.141-144
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    • 1992
  • A Generator Control Systems data is complcated by the existence of a wide variety of Control system types and by the fact that the values of key parameters may depend upon the generator types and operating conditions. This paper decribes the typical value determination methods for generator control systems using response ratio test and step response test. It can be a practical way to provide and verify data for real power system analysis.

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Predictive Maintenance System using Condition Monitoring System of Hydro-turbine Generator (수차발전기 상태진단시스템을 이용한 예지보전체계)

  • Kim, Eung-Tae;Ko, Sung-Ho;Kim, Hyun;Jeong, Yong-Chae;Choi, Seong-Pil
    • 유체기계공업학회:학술대회논문집
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    • 2006.08a
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    • pp.57-60
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    • 2006
  • The purpose of this study is to explain the importance of Vibration Monitoring Device by introducing an example of Predictive Maintenance System using Condition Monitoring System of Hydro-turbine generator. Confirming vibration of generation equipment is commissioning procedure during equipment completion for checking guaranteed items. Data from Generator output range are used to determine output band to continue the performance of equipment. The Vibration Monitoring System is not absolute method of maintenance, but if it is used well with expert, it will be visible, data-analyzed, scientific maintenance more than others. And also, Condition Monitoring System is very important for remote controlled small hydro-power plant although most of it is installed in Large hydro-power plant.

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Cheju Hanlim S/T Model Parameter Determination and Assessment of Voltage Control Loop on the Characteristic Tests of Generator/Excitation System (발전기/제어계 특성시험을 통한 제주한림 S/T 모델정수 결정과 전압제어특성 평가)

  • Kim, D.J.;Moon, Y.H.;Lee, K.J.;Yun, Y.B.
    • Proceedings of the KIEE Conference
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    • 1999.11b
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    • pp.147-149
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    • 1999
  • This paper deals with the determination of generator/exciter model parameters for a Cheju Hanlim steam turbine unit. Using the recorded data from the generator characteristic tests, the model parameters have been derived and verified by comparing the simulation results and recorded data. In addition to it, the closed-loop performance of voltage control on no-load condition has been assessed in the frequency domain by taking advantage of derived generator/exciter model parameters.

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A Design and Implementation of XML Document Generator based on Template (탬플릿 기반 XML 문서 생성기의 설계 및 구현)

  • Yeom, Sae Hun;Bang, Hye Ja
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.8 no.4
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    • pp.73-81
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    • 2012
  • Web development and Internet technology development bring many kinds of works to web. This is the main reason why XML, document standard is popular. XML in web can be used to express document template or standard. XML with java can be more powerful and general. For example, XML can be used to transmit data and to print data into the screen using Ajax in JSP(Java Server Page) and to make interfaces in android, which is useful to reduce development cycle. However, XML is not easy to learn for the novice. In this paper, we propose the easy and effective way to reduce the learning curve of XML and to make and use XML documents. For the purpose, we suggest template base XML document generation and we design and implement XML document generator based on Template. XML document generator of template-based provides user interface and layout of XML document. So, users can generate XML document easily and effectively.

Report on Predictive Maintenance System using Condition Monitoring System of Hydro-turbine Generator (수차발전기 상태진단시스템을 이용한 예지보전체계 사례)

  • Ko, Sung-Ho;Jeong, Yong-Chae;Choi, Seong-Pil;Kwack, Young-Kyun;Han, Seung-Yeul
    • The KSFM Journal of Fluid Machinery
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    • v.13 no.1
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    • pp.29-34
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    • 2010
  • The purpose of this study is to explain the importance of Vibration Monitoring Device by introducing an example of Predictive Maintenance System using Condition Monitoring System of Hydro-turbine generator. Confirming vibration of generation equipment is commissioning procedure during equipment completion for checking guaranteed items. Data from Generator output range are used to determine output band to continue the performance of equipment. The Vibration Monitoring System is not absolute method of maintenance, but if it is used well with expert, it will be visible, data-analyzed, scientific maintenance more than others. And also, Condition Monitoring System is very important for remote controlled small hydro-power plant although most of it is installed in Large hydro-power plant.

A Study on the Development of Generator Maintenance Scheduling Program Package (발전기 예방정비계획 전산화모형 개발에 관한 연구)

  • Won, Jong-Ryul;Yoon, Yong-Beum;Park, Si-Woo;Nam, Jae-Hyun
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.48 no.11
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    • pp.1374-1381
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    • 1999
  • This paper describes development of a package for generator maintenance scheduling program with user-friendly interactive mode. Generator maintenance scheduling is to select desirable maintenance periods of generators in the given interval satisfying reliability or economic criteria. Window-based system for user-friendly mode and Oracle-based database system for efficient data management are established in our package. Reserve rate levelization and LOLP minimization are performed in calculation mode, which is composed of DLL programs. Many graphs and charts are illustrated for the user-analysis. Operation is carried out by day-based unit, not by week. The case study has been conducted with the data of practical KEPCO power system in 1999 and successfully demonstrated its effectiveness.

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Analysis of Burst Pressure for Wear-Damaged Steam Generator Tubes (마멸에 의해 손상된 증기발생기 전열관의 파열압력 해석)

  • Shin, Kyu-In;Park, Jai-Hak
    • Journal of the Korean Society of Safety
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    • v.18 no.4
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    • pp.16-22
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    • 2003
  • Generally the rupture of steam generator tubes proceeds from significant plastic deformation before failure. In this study, the burst pressures of damaged steam generator tubes were calculated from the plastic instability analysis with the finite element method. Two wear types, flat and circumferential types were considered. An equation for the burst pressure was proposed by using the strength reduction factor and the Svensson equation. The analysis results were compared with the experiment data from published references and they showed a good agreement with the experiment data.

Development of Shorted-Turn Diagnosis system for Generator Rotor Winding (발전기 회전자 권선의 층간단락 진단시스템 개발)

  • Lee, Yeong-Jun;Kim, Hui-Dong;Ju, Yeong-Ho
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.48 no.11
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    • pp.742-747
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    • 1999
  • On-line diagnosis system has been developed and is now applied the detection of shorted turns in the field winding of large generator. This system consists of data aquisition system and display PC. The data aquisition system detects voltage waveforms from flux probe sensor installed in the stator slot. The display PC shows theshorted-turn situation of generator rotor winding. A shorted-turn diagnosis test wasperformed on five gas turbine generators at the Seoinchon combined cycle power plant. The test was conducted using an new diagnosis system and digital oscilloscope which can identify the pole location, the slot number and the number of shorted turns within each slot. It is confirmed that results of two systems are very same in the field tests.

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