Robust Unit Commitment Considering Uncertainties of Wind and Energy Intensive Load Dispatching

To alleviate the problem of abandoned wind, the coordination between wind and energy intensive loads has been conducted in Gansu power system of China. However, the active power of energy intensive loads, like electric arc furnaces, is under continuous fluctuations during operations, which will influence the automatic generation control (AGC) system of the local grid. To investigate the impact of uncertainty in energy intensive loads on the aforementioned coordination, this paper proposes a robust unit commitment method to take the uncertainties of wind and energy intensive loads into consideration simultaneously. The proposed model illustrates the relevance between the active power fluctuation and the status of electric arc furnaces. The robust method minimizes the conditional values at risk of the load and wind curtailment, under the uncertainties of both wind and energy intensive loads, and the uncertainty of the loads is well considered in the coordination between wind and energy intensive loads. The proposed method is verified in IEEE RTS-79 system and the impacts of uncertainty of energy intensive loads on power system scheduling are also analyzed. © 2019 Automation of Electric Power Systems Press.