DOI QR코드

DOI QR Code

Problem Analysis by Iron Core Structure of the Transformer on Asymmetric three Phase lines and Prevention Measures

비대칭 3상 선로에서 변압기의 철심구조별 문제점 분석 및 방지대책

  • 신동열 (한국전력 전력연구원) ;
  • 윤동현 (충남대학교 전기공학과) ;
  • 차한주 (충남대학교 전기정보통신공학부)
  • Received : 2012.07.18
  • Accepted : 2012.09.25
  • Published : 2012.10.01

Abstract

The study analyzed problems by iron core structure of the three phased transformer on asymmetric three phase lines, which included line disconnections, ground faults, COS OFF, and unbalanced loads on the power distribution system. In particular, by analyzing PT combustion cases within the MOF, the study was able to analyze the combustion cause of the core-type transformer and its effect on the system, conduct simulations and practice demonstrations on the characteristics for each iron core structure of the three phase transformer using PSCAD/EMTDC, and suggest measures to prevent the combustion of the core-type transformer.

Keywords

Core type transformer;Shell type transformer;Single phase bank type transformer;Iron core structure;Connection method;Power distribution system

References

  1. 신동열, 하복남, 정원욱, 차한주, "배전계통에서 변압기 결선에 의한 역 조류 현상에 관한 연구", 조명설비학회논문지 22권 제 9호, 2008.9.
  2. 신동열, 박용우, 차한주 " 분산형 발전고객의 OCGR 오동작 및 과부족 계량에 대한 사례연구", 대한전기학회논문지 57권 제8호, 2008.8.
  3. 전력연구원 송배전연구소 기술지원(2011-K-00374-1), '22.9kV 배전선로 단선으로 인한 수용가측 MOF 소손원인 분석", 2011.08.
  4. W. Enright, N. Watson, O.B.Nayak, "Three-phase Five-Limb Unified Magnetic Equivalent Circuit Transformer models for PSCAD V3", IPST '99 Proceedings, Budapest, pp.462-467, 1999.
  5. 전력연구원 송배전연구소 기술지원(2011-K-000389-1), "결상 및 불평형 부하시 변압기 결선(Y,$\Delta$) 및 철심구 조(3-Limb, 5-Limb)별 1-2차 전류해석", 2011.08.
  6. 전력연구원 송배전연구소 기술지원(2011-K-000447-1), "3상 통합형주상변압기 결상 및 부하불평형시 1-2차 전류해석", 2011.09.

Cited by

  1. The Development of an Algorithm for the Correction of Errors in the Phase Current of the Protective Relay on Distribution System Interconnected with Distributed Generations vol.62, pp.11, 2013, https://doi.org/10.5370/KIEE.2013.62.11.1604
  2. Open-Phase Condition Detecting System for Transformer Connected Power Line in Nuclear Power Plant vol.64, pp.2, 2015, https://doi.org/10.5370/KIEE.2015.64.2.254
  3. Zero Sequence Impedance of Yg-Yg Three Phase Core Type Transformer vol.65, pp.6, 2016, https://doi.org/10.5370/KIEE.2016.65.6.940
  4. Stand-Alone Microgrid Inverter Controller Design for Nonlinear, Unbalanced Load with Output Transformer vol.7, pp.4, 2018, https://doi.org/10.3390/electronics7040055