The smart phase-swapping switches are used to rapidly change the phases of single-phase loads online in low-voltage distribution systems. They can reduce the three-phase imbalance indices. However, the effectiveness of phase-swapping operations is determined by not only the control strategy but also by the quantity and locations of smart phase-swapping switches. In this paper, a configuration method is proposed to determine the preferable quantity and locations of smart phase-swapping switches with considerations of economic benefits and operational requirements. Based on historical load information, the active and reactive powers of the loads are used to formulate the current imbalance index. The configuration problem is modeled as a multiobjective optimization that minimizes the current imbalance indices of all nodes and phase-swapping operations. The problem is solved by the particle swarm optimization algorithm to obtain the phase-swapping participation index of each single-phase load. The loads with high phase-swapping participation indices are preferably equipped with smart phase-swapping switches. The simulation results verify that the proposed method is effective and easy to be implemented in practical applications.

中文翻译：

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基于有序参与指数的低压配电系统智能换相开关配置

智能换相开关用于低压配电系统中单相负载的在线快速换相。它们可以降低三相不平衡指数。然而，换相操作的有效性不仅取决于控制策略，还取决于智能换相开关的数量和位置。本文结合经济效益和运行要求，提出了一种确定智能换相开关的优选数量和位置的配置方法。根据历史负载信息，利用负载的有功和无功功率来制定电流不平衡指数。配置问题被建模为一个多目标优化，最小化所有节点和相位交换操作的当前不平衡指数。该问题通过粒子群优化算法求解，得到各单相负载的换相参与指数。具有高换相参与指数的负载优选配备智能换相开关。仿真结果验证了所提出的方法是有效的，并且在实际应用中易于实现。