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

The Korean Institute of Electrical Engineers (대한전기학회)
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Evaluation of Ramping Capability for Day-ahead Unit Commitment considering Wind Power Variability

풍력발전의 변동성을 고려한 기동정지계획에서의 적정 Ramping 용량 산정

  • Lyu, Jae-Kun (Dept. of Electrical Engineering and Computer Science, Seoul National University) ;
  • Heo, Jae-Haeng (Master's Space) ;
  • Park, Jong-Keun (Dept. of Electrical Engineering and Computer Science, Seoul National University)
  • Received : 2013.01.09
  • Accepted : 2013.03.04
  • Published : 2013.04.01
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Abstract

Wind energy is rapidly becoming significant generating technologies in electricity markets. As probabilistic nature of wind energy creates many uncertainties in the short-term scheduling, additional actions for reliable market operation should be taken. This paper presents a novel approach to evaluate ramping capability requirement for changes in imbalance energy between day-ahead market and real-time market due to uncertainty of wind generation as well as system load. Dynamic ramp rate model has been applied for realistic solution in unit commitment problem, which is implemented in day-ahead market. Probabilistic optimal power flow has been used to verify ramping capability determined by the proposed method is reasonable in economic and reliable aspects. This approach was tested on six-bus system and IEEE 118-bus system with a wind farm. The results show that the proposed approach provides ramping capability information to meet both forecasted variability and desired confidence level of anticipated uncertainty.

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References

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