基于乡村微网联络线功率不平衡度的蓄热式电采暖日前优化调度方法  

Day-ahead Optimization Dispatching Method for Regenerative Electric Heating based on Tie-line Power Imbalance of Rural Micro-grid

作　　者：李伟 周云海[1] 宋德璟 石亮波 陈奥洁 LI Wei;ZHOU Yunhai;SONG Dejing;SHI Liangbo;CHEN Aojie(College of Electrical Engineering and New Energy,Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《水电与新能源》2023年第3期74-78,共5页Hydropower and New Energy

摘　　要：蓄热式电采暖通常在夜间谷电价时段运行,存在用电同时率高导致负荷突变的问题;风电往往在夜间大发,波动性和反调峰性显著。在上述双重因素作用下,夜间时段微网与外电网的联络线功率波动问题严峻。因此利用时段的重合性,提出了仅将夜间时段联络线累加不平衡功率作为优化指标。与日峰谷差指标相比,所提方法能减小联络线上的功率波动及其并网时对配电网的冲击。Regenerative electric heating is usually operated in the valley electricity price period at night,which has the problem of load mutation caused by high power consumption at the same time.While,wind power often generates large amounts of electricity at night,with obvious volatility and reverse-peaking.Under the action of the above two factors,the power fluctuation of the tie-line connecting the micro-grid and the external power grid is serious at night.Therefore,considering the coincidence of time periods,it is proposed to take only the accumulated unbalanced power of the tie-line at night as the optimization index.Compared with the daily peak-valley difference index,the proposed method can reduce the power fluctuation of the tie-line and the impact on the distribution network when it is connected to the grid.

关 键 词：风电不确定性 蓄热式电采暖 联络线功率不平衡度 乡村微网 配电网 

分 类 号：TM61[电气工程—电力系统及自动化]