摘要
以风电、光伏为代表的大规模可再生能源接入对电网线损评估及降损管理工作带来了较大挑战。提出一种基于实际运行数据驱动的新能源出力对电网线损影响分析方法,首先根据输电线路典型模型对输电线路线损进行分析,将其表示为输送有功功率的二次多项式函数,然后将其扩展到全网,并据此构建了全网等值线损评估模型;对于等值线损模型中的未知参数,提出基于实际运行数据拟合的模型解析方法。最后,以某省级电网为例,对所提线损评估模型误差、不同发电类型线损率灵敏度因子及新能源出力对线损影响等进行了分析,对所提模型的有效性进行了验证。
The large-scale integration ofrenewable energy like wind power and photovoltaic poses great challenges to the power grid line loss assessment and loss reduction management.In this paper,an analysis method of the impact of renewable energy generation on grid line loss based on the actual operation data is proposed.First,the transmission line loss is analyzed according to the typical model of transmission line,which is expressed as a quadratic polynomial function of the transmission active power.Second,the model is extended to the whole network,and the whole network’s equivalent line loss evaluation model is constructed accordingly.For the unknown parameters in the equivalent line loss model,a data fitting method based on actual operation data is proposed.Finally,taking a provincial power grid as an example,the model error,sensitivity factor of line loss rate of different generation types and the influence of renewable energy output on line loss are analyzed and the effectiveness of the proposed model is verified.
作者
陈建华
皇甫成
梁吉
汪鸿
巨云涛
CHEN Jianhua;HUANGFU Cheng;LIANG Ji;WANG Hong;JU Yuntao(State Grid Jibei Electric Power Company Limited,Beijing 100054,China;China Agricultural University,Beijing 100083,China)
出处
《电网与清洁能源》
2020年第8期60-66,共7页
Power System and Clean Energy
基金
国家自然科学基金项目(51707196)。
关键词
实际数据驱动
新能源出力
线损评估
灵敏度因子
actual data driven
renewable energy generation
line loss assessment
sensitivity factor
