中低压配电网不平衡负荷引起的损耗研究

Research on Loss Caused by Unbalanced Load in Medium and Low Voltage Distribution Network

近年来我国工业飞速发展,大量非线性冲击性负荷如弧焊设备、电动机车等也投入到日常使用中,这些冲击性负荷极易造成三相负荷的不平衡,不仅会引起线路损耗增加,而且严重影响电能质量带来譬如电压闪变、波动增加网络中谐波含量等问题。因此,开展配电网低压负荷不平衡损耗研究,具有很强的现实意义。

In recent years, China’s industrial field has developed rapidly. A large number of non-linear impact loads such as arc welding equipment and electric locomotives have also been put into daily use. These impact loads are likely to cause imbalance of three-phase loads, which causes the increase of line loss, and seriously affects the power quality,such as voltage flicker, fluctuations increase the harmonic content in the network and other problems. It is of great practical significance to carry out the research on the unbalanced loss of the low-voltage load in the distribution network.