基于模糊控制的区域电动汽车入网充放电调度策略

提出一种基于模糊控制的电动汽车入网(V2G)充放电调度策略。首先，提出V2G管理系统的整体结构，其主要由有序充电调度系统和V2G变流器控制系统组成，前者合理安排各充电桩的充放电功率，实现削峰填谷的辅助功能；后者响应上层调度下发的功率指令，控制实际充放电行为，提供稳定的电能变换和能量交换的接口。然后，在有序充电调度系统中综合当前配电网的负荷特点，对当前接入充电站的全部电动汽车进行调配，并采用模糊控制算法计算充放电功率并下发给各充电桩，改善区域电网的负荷特性，实现削峰填谷的辅助功能。最后，通过仿真实验证明所提有序充电调度系统在满足电动汽车充电需求的同时，能够充分地利用电动汽车负荷的灵活性；在实现对电网削峰填谷的同时，有效地避免了电网负荷低谷时段大量电动汽车充电引起新负荷尖峰的问题。

Charging and discharging dispatch strategy of regional V2G based on fuzzy control

A charging and discharging dispatch strategy of V2G(Vehicle-to-Grid) based on fuzzy control is proposed. Firstly, the overall structure of V2G management system is proposed, which is mainly composed of the ordered charging dispatch system and the control system of V2G converter. The former arranges the charging and discharging power of each charging pile reasonably to realize the auxiliary function of peak-load shifting. The latter responds to the power command issued by the upper dispatch system, controls the actual charging and discharging behavior, and provides a stable interface for power conversion and energy exchange. Then, in the ordered charging dispatch system, considering the load characteristics of the current distribution network, all electric vehicles connected to the charging station are dispatched and allocated, and the charging and discharging power is calculated by fuzzy control algorithm and then is distributed to each charging pile, so as to improve the load characteristics of the regional power grid and realize the auxiliary function of peak-load shifting. Finally, the simulation experiment indicates that, the proposed ordered charging dispatch system can fully utilize the flexibility of electric vehicle load while meeting the charging requirements of electric vehicles, and can not only realize the peak-load shifting for power grid, but also effectively avoid the problem of new load peak caused by the charging of a large number of electric vehicles in the load valley period of power grid.