• Title/Summary/Keyword: Korea Water Resources corporation

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A Study of Developing Solar Power Generation Using Flood Control Reservoir (홍수조절지를 활용한 태양광전원 개발에 관한 고찰)

  • Park, Sung-Oh;Kim, Chang-Bum;Min, Hoon-Jin;Han, Jung-Kyun
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.1340-1341
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    • 2011
  • '12년 RPS 제도시행으로 태양광발전이 신재생에너지로서 큰 관심을 받고 있다. 이에 홍수기 이외에는 대규모의 유휴지가 발생하는 홍수조절 부지를 활용하여 태양광전원 개발방안과 개발규모에 관하여 검토하는 것이 본 연구의 목적이다.

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대청댐하류 오염물질 이송.확산

  • Lee, Hye-Geun;Kim, Dae-Hong;Sin, Jae-Gi;Yang, Jae-Rin
    • Journal of Korea Water Resources Association
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    • v.33 no.S1
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    • pp.762-767
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    • 2000
  • 본 연구에서는 금강유역전반에 걸친 수문 및 수질 현황을 조사 파악하였다. 또한 8회에 걸친 수질조사를 통하여 대청댐하류의 수질을 분석하였으며, 조사·분석된 자료를 바탕으로 일반수질항목에 대하여 기존의 수리·수질 모형을 개선하여 수질모의를 수행하였다. 또한 유해물질 유출사고시 조정지 댐에서의 적절한 방류시기를 결정하기 위한 주요지점에서의 도달시간을 산정하였다.

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An assessment of the effect of air scouring and swabbing pig cleaning technique on water distribution pipes (공기주입과 스와빙 피그를 이용한 상수관로 세척 효과 평가)

  • Bae, Cheolho;Lee, Doojin;Choi, Doo-Yong;Jun, Hongjin;Park, Sehyun;Choi, Taeho
    • Journal of Korean Society of Water and Wastewater
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    • v.29 no.4
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    • pp.459-468
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    • 2015
  • Deposits discharged through the cleaning mainly were cement mortar, bitumen paintings and rust pieces, and fragments of perforation, stones and gravels. Deposits were more removed through swabbing pig cleaning rather than air scouring cleaning on the whole. However, air scouring cleaning were not influenced by the constraint conditions such as a change in the diameter or the presence of the valve in water mains compare to swabbing pig cleaning. So, it was thought that air scouring cleaning might be more favorable to water distribution network cleaning in the future. After the cleaning, water quality including residual chlorine and turbidity also was improved because of the removal of a significant amount of the deposits. Therefore, if the cleaning is continuously and regularly implemented in water mains, it is expected that it will help to recover the reliability and to preserve the health of water quality.

Study of energy saving applied optimization method of inverter in In-Line pump station (인라인 가압장에서의 최적 인버터 제어방안 구축을 통한 에너지절감 연구)

  • Choi, Jin-Seok;Park, Seong-Ho;Kim, Jong-Deuk;Yoo, Taek-Su;Kim, Gyo-Hun;Kim, Tea-Won
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.1840-1841
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    • 2011
  • 본 논문은 최근 에너지 절감 및 생산성 향상, 품질 향상, 원가 절감에 지대한 영향을 미치고 있는 인버터의 제어방안에 대한 연구이다. 보다 효율적인 펌프운전을 위해 댐 원수를 취수하는 인라인 가압장에 정밀성과 제어성능이 우수한 가변속 전력변환장치인 인버터가 적용되어 운영되었다. 하지만 인버터 1대 적용시 고 rpm에는 효율이 급격하게 떨어져 전력요금 상승을 가져오고 또한 펌프기동반 내부 온도 상승 및 권선온도 상승을 가져옴으로써 전반적인 효율 저하를 나타나게 됨에 따라 인버터 조합 운전 방안을 찾고 에너지 절감 방안을 모색하고자 실제 적용사례를 중심으로 연구되었다.

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A Study on the cause and permanent measures on trouble of the GCB for the Main Tr. of Voltage, 154kV (154kV 주변압기용 가스차단기(GCB) 소손에 따른 원인규명과 항구대책 분석)

  • Jeon, Kyu-Nam;Chang, Moon-Soung;Ock, Gwang-Seok;NamGoong, Hyuk;Ahn, Joo-Hoon;Jeong, Jae-Won
    • Proceedings of the KIEE Conference
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    • 2008.11a
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    • pp.285-286
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    • 2008
  • The Gas Circuit Breaker for the Main Transformer of voltage, 154kV at the ist Hapcheon hydraulic power station, break down by the falling of a thunderbolt from now, let's improve the efficiency on the maintenance of generating equipment by studying about the cause and the method for this problem.

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A Study on the Lightning Protection and Earthing Supplement for 154kV Switch yard of Hapchon Hydro-Power Station (합천수력 154kV 옥외변전소 낙뢰대책 및 접지보강 연구)

  • NamKung, Hyuk;Jeon, Kyu-Nam;Ock, Gwang-Seok;Choi, Hyong-Chul;Lee, Nam-Hyong;Jang, Jung-Ho
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.83_84
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    • 2009
  • The Gas Circuit Breaker for the Main Transformer in switch yard at the 1st Hapcheon hydraulic power station, has broken down by direct lightning stroke and induced stroke. so, this paper present the stable operation of equipment in switch yard through the improvement of earthing system and the protection to the lightning

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Study on electric equipment design for solution about Hapcheon No.2 Hydropower capacity increase and consequential grid-connection problem (합천 제2수력 발전기 용량증대에 따른 계통연계범위 이탈문제 해결을 위한 설비설계 방안 고찰)

  • Jeong, Hyo-Geun;Kim, Woo-Yong;Kang, Dong-Hyung;Choi, Hong-Yeol;Ham, Dong-Young;Jeong, Jun-Gi
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.219-220
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    • 2015
  • 합천 제2수력 수차발전기 용량증대사업($1,200{\rightarrow}1,800kW$)에 따른 실시설계 시 계통연계 가능여부를 한전으로부터 확인한 결과, 해당 배전선로에 기 연계된 분산형전원에 의해 전압 상한치를 이미 상당히 초과하여 연계 불가한 것으로 회신받음에 따라 계통연계범위 이탈문제 해결 및 해당 배전선로 연계를 위한 위한 설비설계 방안을 고찰하였다.

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A study on insulation characteristics with AC Breakdown Test for Stator Winding of 3.3kV class Induction Motor (절연파괴시험을 통한 3.3kV 유도전동기의 절연특성 연구)

  • Lee, Dong-Geun;Lee, Kwang-Ho;Choi, Kyo-Nam;Kim, Hyun-Il;Kwak, Hee-Jin;Oh, Bong-Keun
    • Proceedings of the KIEE Conference
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    • 2005.07c
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    • pp.2118-2122
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    • 2005
  • This test was performed to assess the corelation of insulation deterioration condition with breakdown voltage of the stator winding of 3.3kV class induction motors which have been in service for 10 years after being installed in 1993. The insulation diagnostic tests include resistance, polarization index(P.I), dissipation factor$({\Delta}tan{\delta})$, maximum partial discharges (Qmax) and AC breakdown test. we evaluated the corelation of insulation diagnostic test with AC breakdown test for stator wilding of high voltage induction motor.

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The Selection of the Condenser Positions for the Improvement Power Factor of the High Voltage Induction Motors (고압유도전동기의 역률개선을 위한 콘덴서 위치 선정 방안)

  • Lee, Eun-Chun;Jeon, Il-Bang;Kim, Chang-Bum;Choe, Yeong-Gyu;Shin, Kang-Uk;Hong, Sung-Taek;Lee, Eun-Woong
    • Proceedings of the KIEE Conference
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    • 2005.07b
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    • pp.1068-1070
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    • 2005
  • This study sorted high voltage motors by the voltage and the capacity and analyzed the property of motor-start. So we found out some problems of the starting circuit from several sites, and made the answers of the problems. If these results of our study are utilized in new WTPs, the safety of the starting circuit will be improved and the life of electric power system will be longer. We recommend this study as a reference when our company founds the standard of electric facility design.

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