The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지
DOI QR코드

DOI QR Code

Conversion Function and Relationship of Loss of Load Expectation Indices on Two Kinds of Load Duration Curve

두 종류의 부하곡선에 관한 공급지장시간기대치(LOLE)의 상호 변환관계성

  • Lee, Yeonchan (Dept. of Electrical Engineering, Gyeonsang National University) ;
  • Oh, Ungjin (Dept. of Electrical Engineering, Gyeonsang National University) ;
  • Choi, Jaeseok (Dept. of Electrical Eng., RIGET, ERI, Gyeongsang National University) ;
  • Cha, Junmin (Dept. of Electrical Engineering, Daejin Univerity) ;
  • Choi, Hongseok (KOREA POWER EXCHANGE(KPX)) ;
  • Jeon, Donghun (KEPCO Research Institute)
  • Received : 2016.04.05
  • Accepted : 2017.02.08
  • Published : 2017.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper develops a conversion function and method transforming from daily peak load curve used $LOLE_D$ [days/year] to hourly load curve used $LOLE_H$[hours/year]and describes relationship between $LOLE_D$ [days/year] and $LOLE_H$ [hours/year]. The indices can not only be transformed just arithmetically but also have different characteristics physically because of using their different load curves. The conversion function is formulated as variables of capacity and forced outage rate of generator, hourly load daily load factor and daily peak load yearly load factor, etc. Therefore, the conversion function (${\gamma}={\varphi}$(.)) can not be simple. In this study, therefore, the function is formulated as linear times of separated two functions. One is an exponential formed conversion function of daily load factor. Another is formulated with an exponential typed conversion function of daily peak load yearly load factor. Futhermore, this paper presents algorithm and flow chart for transforming from $LOLE_D$[days/year] to $LOLE_H$[hours/year]. The proposed conversion function is applied to sample system and actual KPS(Korea Power System) in 2015. The exponent coefficients of the conversion functions are assessed using proposed method. Finally, assessment errors using conversion function for case studies of sample system and actual system are evaluated to certify the firstly proposed method.

Keywords

References

  1. Roy Billinton, "Power System Reliability Evaluation" Gordon and Breach Science Publishers, 1977.(ISBN 0-677-02870-9)
  2. Roy Billinton & Ronald N. Allan, "Reliability Evaluation of Power Systems", p. 27-31, Plenum Press, 1984.
  3. Roy Billinton & Ronald N. Allan, "Reliability Assessment of Large Electric Power System", Kluwer Academic Publishers, 1988.
  4. Jaeseok Choi, "Power System Reliability Evaluation Engineering", G&U Press, 2013, (written by Korean, ISBN 978-89-6257-060-1).
  5. J. Vardi and B. Avi-Itzhak, "Electric Energy Generation; Economics, Reliability and Rates", p. 38, MIT, 1981.
  6. Ali Khraiwish Dalabeeh and Eng.Hani Hasan Saleh Al-Hajbi, "Reliability Worth Assessment in Composite Power System Planning and Operation", Modern Applied Science; Vol. 8, No. 5; 2014 (ISSN 1913-1844 E-ISSN 1913-1852) Published by Canadian Center of Science and Education.
  7. Michael Milligan, "Methods to Model and Calculate Capacity Contributions of Variable Generation for Resource Adequacy Planning(IVGTF1-2)", Additional Discussion NERC Loss of Load Expectation Working Group, National Renewable Energy Laboratory Atlanta, GA Jan. 20, 2011. (NREL/PR-5500-50355)
  8. Jaeseok Choi, Jintaek Lim and Kwang Y. Lee, "DSM Considered Probabilistic Reliability Evaluation and an Information System for Power Systems Including Wind Turbine Generators", IEEE TRANSACTIONS ON SMART GRID, Vol. 4, No. 1, March 2013, pp. 425-432. https://doi.org/10.1109/TSG.2012.2234150
  9. R. L. Sullivan, "Power System Planning", p. 61-95, McGraw-Hill, 1977.
  10. J.P. Stremel, R.T. Jenkins, R.A. Babb, and W.D. Bayless, "Production Costing Using the Cumulant Method of Representing the Equivalent Load Curve", IEEE Trans. on Power Apparatus and Systems, 99, 1947-1956, 1980.
  11. G. Gross, N.V. Garapic and B. McNutt, "The Mixture of Normals Approximation Technique for Equivalent Load Duration Curves", IEEE Trans. on PWRS., 3, 368-374, 1988.
  12. Roy Billinton and Wenyuan Li, "Reliability Assessment of Electric Power Systems Using Monte Carlo Methods", Plenum Press, 1994.
  13. KEPCO, "A Study on the Analysis for Generation Planning using MNI" KEPCO Reports, 1988.
  14. MOTIE, KPX(Korea Power Exchange), "Summary of the 7th Basic Plan for Long-term Electricity Supply and Demand (2015-2029)", MOTIE notice, #2015-403, August 2015.
  15. KPX,"http://www.kpx.or.kr/www/contents.do?key=23", KPX 홈페이지