Transformer area three-phase imbalance phase-change switch control method and device

The invention provides a transformer area three-phase imbalance commutation switch control method, which comprises the following steps: obtaining a load current of a slave switch and preprocessing thethree-phase current of the slave switch; calculating the compensation current index of the three-phase current; and judging whether the slave switch is switched according to the compensation currentindex. The invention further provides a transformer area three-phase imbalance phase-change switch device. According to the invention, it is guaranteed that a control strategy which is close to the optimal currently is calculated instantaneously, the unbalance degree of the low-voltage side of a power grid reaches the existing optimal state, real-time switching can be carried out, manual intervention is not needed, and the management cost is reduced by one-time construction and installation. 本发明提供一种台区三相不平衡换相开关控制方法，包括以下步骤：获取从机开关的负载电流并对从机开关的三相电流进行预处理；计算三相电流的补偿电流指标；根据补偿电流指标判断从机开关是否投切。本发明还提出一种台区三相不平衡换相开关装置，本发明保证在瞬时计算出当前接近最