Active distribution network is integrated with a large number of renewable energy sources and flexible loads such as electric vehicles(EVs). The unstable output of distributed generation and the random access to different phases cause three phase unbalance in the distribution network, which increase the energy loss and carbon emissions. Three phase unbalance reduction requires high real-time dispatch and optimization of the power flow. This paper attempts to reduce the energy loss and carbon emission by using flexible multi-state switch (FMSS) with optimal energy dispatch strategy. A multi-objective optimization model is established based on second-order cone relaxation to reduce the three-phase unbalance and energy loss. EVs regulation strategy is proposed by analyzing their charging flexibility. A fast solution method is brought up based on second-order cone model transformation. The effectiveness and rapidity of the method is verified by multiple cases. © 2024 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

中文翻译：

---

使用灵活多状态开关的主动配电网三相不平衡减少和能量优化

主动配电网集成了大量可再生能源和电动汽车（EV）等灵活负载。分布式电源出力的不稳定和不同相的随机接入导致配电网三相不平衡，增加了能量损失和碳排放。减少三相不平衡对潮流的调度和优化要求较高。本文试图通过采用灵活多态开关（FMSS）和最优能源调度策略来减少能源损失和碳排放。建立基于二阶锥松弛的多目标优化模型，以减少三相不平衡和能量损失。通过分析电动汽车充电灵活性，提出电动汽车监管策略。提出了一种基于二阶锥模型变换的快速求解方法。多个案例验证了该方法的有效性和快速性。 © 2024 日本电气工程师协会和 Wiley periodicals LLC。