In the distribution network, the addition of distributed power sources can improve the voltage part of the distribution system, provide uninterrupted power supply, and reduce network losses. The location of the power supply and its output will also directly affect the system voltage and power loss. Therefore, determining the optimal installation location and capacity of distributed power generation is of great significance to the distribution network. However, in the actual system, due to the unbalanced load distribution and the three-phase unbalance of the transmission line, the power distribution system presents the characteristics of unbalanced distribution. As the number of electric vehicles increasing, the imbalance of the distribution network has become more prominent.

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