摘要
高渗透的风电并网带来的强不确定性导致风电消纳受到阻碍,为此挖掘电解铝和铁合金负荷的调度潜力就近消纳风电。为表征风电功率的不确定性,建立基于Wasserstein距离的风电预测误差概率分布模糊集,并在极限场景下对概率分布模糊集的粗略计算半径进行修正,通过引入联合机会约束将不确定变量所在不等式成立限定在最低置信度水平之上,提高模型的可靠性,然后建立源荷协调的两阶段分布式鲁棒优化调度模型。第1阶段充分利用风电预测信息,调度电解铝负荷优化机组组合,第2阶段考虑风电出力的不确定性,调度铁合金负荷优化机组出力。通过将模型近似转化为混合整形线性规划问题,利用顺序求解算法进行求解。最后,采用IEEE 24节点算例验证了模型可有效提高风电消纳能力,降低综合运行成本,能够在经济性和鲁棒性之间取得平衡。
Wind power consumption is hindered by the strong uncertainty caused by high permeability wind power grid⁃connection.Therefore,the scheduling potential of electrolytic aluminum and ferroalloy loads is exploited to consume wind power nearby.To characterize the uncertainty of wind power,a wind power forecasting error probability distribution fuzzy set based on Wasserstein distance is established,and the roughly⁃calculated radius of the fuzzy set of probability distribution is corrected in the extreme scenario.By introducing joint opportunity constraints,the establishment of inequality of the uncertain variables is limited to the lowest confidence level to improve the reliability of the model.And then,a two⁃stage distributed robust optimal scheduling model for source⁃load coordination is established.In the first stage,the wind power forecasting information is utilized sufficiently to schedule electrolytic aluminum load and optimize unit combination.In the second stage,the uncertainty of wind power output is considered,and ferroalloy load is scheduled to optimize unit output.The model is approximately transformed into a mixed shaping linear programming problem and solved by sequential algorithm.The IEEE 24 node example is used to verify the model.The verification results show that the model can effectively improve the wind power consumption capacity,reduce the comprehensive operating cost,and achieve a balance between economy and robustness.
作者
万冰
蔺红
WAN Bing;LIN Hong(School of Electrical Engineering,Xinjiang University,Urumqi 830017,China)
出处
《现代电子技术》
2022年第21期164-170,共7页
Modern Electronics Technique
基金
国家自然科学基金资助项目(51667019)。
关键词
鲁棒优化
不确定性
风电消纳
源荷协调
优化调度
Wasserstein距离
机组组合
robustness optimization
uncertainty
wind power consumption
source⁃load coordination
optimal scheduling
Wasserstein distance
unit combination
作者简介
万冰(1996-),男,安徽淮北人,硕士研究生,主要研究方向为电力系统稳定运行控制;通讯作者:蔺红(1969-),女,新疆乌鲁木齐人,博士,教授,博士生导师,研究方向为电力系统稳定运行控制及新能源并网发电技术。
