基于新能源等地方电源出力对配电网线损影响的研究

Research on the Influence of New Energy and Other Local Power Sources on the Line Loss of Distribution Network

随着风电、光伏、生物质等大规模新能源接入,电网降损管理工作将迎来挑战。文章通过建立220 kV主变统计线损率计算模型分析,得出“随着新能源等地方电源出力的不断增大,线损率由降转升”的特性,分析电源出力对线损的影响,得出该线损率的极值点,提出一种基于实际运行数据驱动的分析方法,引入源荷比系数,并利用历史数据进行二次函数拟合,得出线损率极小值对应的理论源荷比。

With the large-scale access of new energy such as wind power,photovoltaic and biomass,the management of power grid loss reduction is facing a great challenge.In this paper,the statistical line loss rate calculation model of 220 kV main transformer is established,The analysis shows that"with the continuous increase of local power sources such as new energy,the line loss rate will change from decreasing to increasing.In order to deeply analyze the impact of power output on line loss and obtain the extreme value of the line loss rate,an analysis method based on actual operation data is proposed.The source load ratio coefficient is introduced and the historical data is used for quadratic function simula‐tion to obtain the theoretical source load ratio corresponding to the minimum value of the line loss rate.