中低压配网综合线损率指标计算方法研究

Research on calculation method of the comprehensive line loss rate of middle and low voltage distribution network

针对配网中损耗占比最大的中低压配网,包括10 kV配电线路、10 kV变压器以及低压配电线路。因此,本文在计算中低压配网线损率时也分为10 kV线路线损计算、变压器损耗计算以及低压配网线损计算三部分。10 kV线路线损指标计算采用等值电阻法,对公变变损率采用经验公式估算,低压配网线损指标计算采用电压损失法,进而根据各部分售电量占比情况计算得到综合线损率指标,本文最后以某地区历史年份为例。

The middle and low voltage distribution network was as the largest loss section in the distribution network, included 10 kV power distribution line, 10 kV transformer and low voltage power distribution line. So we should separate three sections when calculating the line loss rate of low voltage distribution network. The method of equivalent resistance was used to calculate the 10 kV line loss index, the empirical formula was used to estimate the public transform loss rate, the voltage loss method was used to calculate low voltage distribution network line loss, then we could reach the comprehensive line loss rate according to each part of the proportion of electricity contributor to index, lastly, this paper took actual area practical situation as an example to prove the method effectiveness.