摘要
在低压供配电网中,由于用户用电的不确定性,必将导致低压线路三相负荷不平衡。而三相负荷不平衡会引起中性线电流偏移,造成不必要的能源浪费。本文在实验的基础上,根据三相负荷不平衡补偿原理,由三相电流不平衡度的大小和三相负载的性质来确定要补偿的相间电容。本文建立了三相负荷不平衡电容补偿的算法及三相负荷不平衡度对线路损耗的影响关系模型。经大量实验研究表明,该模型在一定范围内能很好的实现对三相负荷不平衡的补偿功能,最终使三相负荷平衡,中性线电流近似为零,达到了较好的节能目的。
In low voltage for power distribution network, due to the uncertainty of power use, it will lead to three-phase unbalanced load in low voltage circuits. However three-phase unbalanced load will cause the neutral current offset, causing unnecessary energy waste. In this paper, on the basis of experiment, according to the principle of three-phase unbalanced load compensation, by the size of the three phase current balance and the properties of three-phase load to determine the capacitance of compensating. This paper established the three-phase unbalanced load compensation algorithm and the influence of unbal- anced three phase loads to line loss model. Through a large number of experimental studies having shown that the model in a certain range can achieve a good compensation function for three-phase unbalanced load, eventually making the three-phase load balancing, the neutral line current is approximate to zero, achieved good purpose of energy saving.
出处
《电子设计工程》
2017年第20期157-160,共4页
Electronic Design Engineering
关键词
低压线路
三相负荷不平衡
中性线电流
电容补偿
算法
节能
： low voltage circuit
three-phase unbalanced load
the neutral line current
capacitance compensation
algorithms
energy saving
作者简介
姚伟（1988-），男，河南驻马店人，硕士，中级讲师。研究方向：信号检测与自动控制。
