低压电网三相不平衡的补偿电流计算和治理

Calculation of 3-phase Imbalance Compensation Current in Low-voltage Power Grid and Treatment

近年来,大规模智能设备接入电网。智能设备大多为单相负荷,使用时间及负荷大小不同,使低压电网三相负载长期处于不平衡,导致低压电网三相不平衡频繁发生。对此,分析了三相不平衡对低压电网的影响,对低压电网三相不平衡补偿电流进行了计算,并对五种低压电网三相不平衡治理装置进行了对比。

In recent years, large-scale smart device has been connected to the power grid.Most of the smart devices are single-phase loads, and the use time and load size are different, which makes the three-phase load of the low-voltage power grid unbalanced for a long time, resulting in frequent three-phase imbalance in the low-voltage power grid.In this regard, the influence of three-phase imbalance on low-voltage power grid was analyzed.The three-phase imbalance compensation current of low-voltage power grid was calculated, and five kinds of three-phase imbalance control devices of low-voltage power grid were compared.