太原理工大学学报2024，Vol.55Issue(1)：12-19,8.DOI:10.16355/j.tyut.1007-9432.20230362
考虑源荷不确定性的电力系统薄弱环节辨识方法
Identification Method of Weak Link in Power System Considering Uncertainty of Power Supply and Load
摘要
Abstract
[Purposes]With the continuous development of new electric power system in our country,large-scale new energy connected to the grid has greatly increased the possibility of bear-ing the impact of power flow,the current carrying capacity of the system line has been on a seri-ous test.At the same time,the increase of source load uncertainty makes the operation state of power grid more complex and changeable,and the traditional weak link identification technology based on deterministic power flow is difficult to meet the requirements,which increases the diffi-culty of power grid operation control.[Methods]In view of the above problems,a comprehensive evaluation index of weak nodes of power system based on the improved entropy theory was pro-posed by combining probabilistic power flow algorithm,and the weakness degree of nodes was analyzed by the probability distribution of index interval.First,a large number of operating mode samples were constructed by probabilistic power flow simulation method.Second,the en-tropy theory was combined with the operating parameters of the power grid,and the probability density of the index interval was used to effectively evaluate the power flow impact distribution equilibrium and voltage stability of the key nodes of the system.[Conclusions]Finally,after the IEEE39-node system was simulated and verified,the conclusion was drawn that the proposed evaluation index is more suitable for the actual running state of the power system,and can effec-tively reduce the error of weak link identification caused by the fluctuation of new energy genera-tion in the new power system and the increase of the uncertainty of the load side user's electricity consumption.关键词
源荷不确定性/熵理论/薄弱环节/概率潮流Key words
uncertainty of power supply and load/entropy theory/a weak link/probabilistic power flow分类
动力与电气工程引用本文复制引用
郑惠萍,赵兴泉,芦晓辉,陈丹阳,薄利明,牛哲文..考虑源荷不确定性的电力系统薄弱环节辨识方法[J].太原理工大学学报,2024,55(1):12-19,8.基金项目
国网山西省电力公司科技项目(52053023000B) （52053023000B）
