配电网降损措施比较与分析

Analysis and Comparison of Methods for Reducing Loss of Distribution Network

配电网降损采取的常用措施有:采用节能型变压器,提高负荷功率因数,增大导线截面等。通过计算比较,发现尽管采取以上措施在短期内对降低配电网损耗、提高电压质量有一定好处,但对于满足负荷发展,其效果及能力较差。究其原因在于现有的配电模式中,配电变压器的供电范围过大,低压线供电半径过长。改变现有的配电模式,采取变压器小容量、多布点,缩短低压线供电距离的供电模式比采取上述降损措施更具有优越性,且更能较好地满足负荷发展的需求。

The common methods for reducing the loss of distribution network include adopting energy-saving transformers, improving power factor of load and increasing the sectional area of conductor. Computation and comparison show that although they are of benefit to reducing the loss and improving the voltage quality in the short term, they can＇ t meet the increase of the load. The reason is that the supply area of distribution transformer is too broad and the supply radius of lowvoltage line is too long in present distribution mode. Modifying present distribution mode, placing small-capacity transformers in more positions and shortening the supply distance of low-voltage line are better than the common methods for reducing the loss and meeting the increase of the load.