Robust Unit Commitment Considering Wind Power Ramp Events
Ai Xiaomeng1, Han Xingning1, Wen Jinyu1, Yao Wei1, Luo Weihua2
1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China; 2. Liaoning Electric Power Supply Co. Ltd. Shenyang 110006 China
Abstract：Wind power has the characteristics of volatility and uncertainty due to its large ramp events and difficulty of accurate prediction, which brings new challenges to power system operation. To cope with ramp event, this paper proposes an exact linearization unit commitment model with constraints of wind power ramp event. Wind power is described by its predicted values as well as the upper and lower limits of its interval prediction to solve the inaccurate prediction. Thus, this stochastic problem can be converted into a deterministic problem by linear robust optimization theory. Case studies are carried out based on a 10-machine 39-bus system with wind farms integration. Simulations show that, the constraints of large wind power ramp event should be considered to guarantee the security of power system, although the constraints of small wind power ramp event have no effect on unit commitment. In addition, since it is linear mixed integer programming, the proposed unit commitment model can be used in practical large-scale systems.
艾小猛, 韩杏宁, 文劲宇, 姚伟, 罗卫华. 考虑风电爬坡事件的鲁棒机组组合[J]. 电工技术学报, 2015, 30(24): 188-195.
Ai Xiaomeng, Han Xingning, Wen Jinyu, Yao Wei, Luo Weihua. Robust Unit Commitment Considering Wind Power Ramp Events. Transactions of China Electrotechnical Society, 2015, 30(24): 188-195.
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