DOI QR코드

DOI QR Code

PSCAD/EMTDC를 이용한 배전계통의 선로전압조정장치와 전지전력저장장치의 모델링에 관한 연구

A Study on the Modeling of Step Voltage Regulator and Energy Storage System in Distribution System Using the PSCAD/EMTDC

  • 김병기 (한국기술교육대 전기전자통신공학부) ;
  • 김기영 (한국기술교육대 전기전자통신공학부) ;
  • 이주광 (한국기술교육대 전기전자통신공학부) ;
  • 최성식 (한국기술교육대 전기전자통신공학부) ;
  • 노대석 (한국기술교육대 전기전자통신공학부)
  • Kim, Byungki (Electrical Electronics & Communication Engineering, Korea University of Technology and Education) ;
  • Kim, Giyoung (Electrical Electronics & Communication Engineering, Korea University of Technology and Education) ;
  • Lee, Jukwang (Electrical Electronics & Communication Engineering, Korea University of Technology and Education) ;
  • Choi, Sungsik (Electrical Electronics & Communication Engineering, Korea University of Technology and Education) ;
  • Rho, Daeseok (Electrical Electronics & Communication Engineering, Korea University of Technology and Education)
  • 투고 : 2014.11.20
  • 심사 : 2015.02.12
  • 발행 : 2015.02.28

초록

태양광전원이 연계된 배전계통에서 발생되는 과전압문제를 해소하기 위하여, 계통에서 발생하는 전압변동에 대응하여 전압을 일정하게 유지시킬 수 있는 선로 전압 조정장치(Step Voltage Regulator)의 도입이 제안되고 있다. 일반적으로 SVR은 전압조정 방법에 의하여 Tap위치를 결정한 후, 일정시간이 지나면 Tap이 동작하도록 운용된다. 하지만 지연시간(30sec) 이후에 Tap을 동작시키는 SVR의 특성에 의하여, 이 시간동안 수용가전압은 규정치를 벗어날 가능성을 가지고 있다. 따라서 본 논문에서는 배전계통의 상용소프트웨어인 PSCAD/EMTDC를 이용하여 LDC방법에 의한 SVR의 전압조정 모델링과, 양방향으로 유무효전력을 제어할 수 있는 전지전력저장장치(Battery Energy Storage System)의 모델링을 제안하였다. 또한 SVR의 문제점을 보완하기 위하여, BESS와의 협조방안에 대한 모델링을 제시하였다. 상기에서 제안한 모델링을 바탕으로 수용가의 전압특성을 분석한 결과, SVR과 BESS에 의하여 안정적으로 전압이 유지됨을 확인하여, 본 연구에서 제시한 모델링의 유효성을 입증하였다.

In order to maintain customer voltage within allowable limit($220{\pm}13V$), tap operation of SVR(step voltage regulator) installed in primary feeder could be carried out according to the scheduled delay time(30 sec) of SVR. However, the compensation of BESS(battery energy storage system) is being required because the customer voltages during the delay time of SVR have a difficultly to maintain within allowable limit when PV system is interconnected with primary feeder. Therefore, this paper presents modeling of SVR to regulate voltage with the LDC(line drop compensation) method and modeling of BESS to control active and reactive power bi-directionally. And also, this paper proposes the coordination control modeling between BESS and SVR in order to overcome voltage problems in distribution system. From the simulation results based on the modeling with the PSCAD/EMTDC, it is confirmed that proposed modeling is practical tool for voltage regulation analysis in distribution system.

키워드

참고문헌

  1. IEC, "Electrical Energy Storage", IEC MSB(Market Strategy Board), 2010.10
  2. NREL, "Grid integration of large-capacity Renewable Energy sources and use of large-capacity Electrical Energy Storage", IEC MSB(Market Strategy Board), 2012.10.
  3. EPRI, "Integrating Smart Distributed Energy Resources with Distribution Management Systems", An EPRI Overview on Managing Distributed Energy Resources, Product No. 1024360, 2012.09.
  4. Wood Allen J, Wollenberg Bruce F. "Power Generation, Operation, and Control", 1976.
  5. IEC, "Grid integration of large-capacity Renewable Energy sources and use of large-capacity Electrical Energy Storage," IEC, 2012.
  6. EPRI, "Integrating Smart Distributed Energy Resources with Distribution Management Systems," EPRI, September 2012.
  7. D. Rho and Hasegawa. J, "A study on the optimal voltage regulation methods in power distribution systems interconnected with dispersed energy storage and generation systems", JIEE, Vol.8, No. 4, pp. 702-707, 1995. DOI: http://dx.doi.org/10.1109/EMPD.1995.500814
  8. B. Kim and D. Rho, "Optimal Voltage Regulation Method for Distribution System with Distributed Generation Systems Using the Artificial Neural Networks", JEET 2013, Vol.8, No. 4, pp. 712-718, 2013. DOI: http://dx.doi.org/10.5370/JEET.2013.8.4.712
  9. R.Y. Kim, S.Y. Choi, and I.Y.Suh, "Instantaneous Control of Average Power for Grid Tie Inverter Using Phase D-Q Roatting Frame with ALL Pass Filter", in Proc. IEEE-IECON, pp.274-279, 2004. DOI: http://dx.doi.org/10.1109/IECON.2004.1433322
  10. D. Rho and M. Kim," A study on the Optimal Operation of Line Voltage Regulator (SVR) in Distribution Feeders", 2004 IFAC Symposium, Seoul, South Korea, 2004.09.
  11. M. Kim, D. Rho, J. Kim, K. Kim, "Optimal Operation Method of Multiple Voltage Regulators in Distribution Systems Interconnected with Dispersed Storage and Generation Systems", Trans. KIEE. Vol. 54A. No. 2, 2005.02.

피인용 문헌

  1. A Study on the Modeling and Operation Algorithm of Independent Power System for Carbon Free vol.65, pp.5, 2016, https://doi.org/10.5370/KIEE.2016.65.5.760