Robust economic dispatch method of microgrid containing high propotion of wind power
CHEN Hao-yong
WANG Yong-chao
XUAN Pei-zheng
LIANG Zi-peng
HUA Dong
Abstract：Renewable energy usually accounts for a large proportion in microgrid, but its inherent intermittency and randomness bring difficulties to microgrid dispatch. In order to deal with the output fluctuations of renewable energy, this paper proposes a microgrid robust economic dispatch (RED) model based on extreme scenario method, considering the complicated generation constraints of wind turbines, diesel engines, fuel cells and batteries. By calculating the economic cost of electric energy of wind curtailment and load shedding, a method for optimizing the error bounds is proposed with the aim of minimizing comprehensive cost, which equals to the sum of generation cost and risk cost. RED method's adaptability in microgrid is also analyzed in this paper from three perspectives including wind power prediction accuracy, accumulator capacity and load shedding price. The results indicate that despite RED method increases the generation cost slightly, it has obvious advantages in reducing electric energy of wind curtailment and load shedding. The analysis shows that, RED method is more suitable for cases with low wind power prediction accuracy, deficient battery storage capacity and high price of load shedding.
Keywords：renewable energymicrogridrobust economic dispatcherror boundload shedding
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 1104-1111 )