考虑电动汽车充电需求的虚拟电厂负荷均衡管理策略
Load Balancing Management Strategy for Virtual Power Plants Considering Charging Demand of Electric Vehicles
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摘要: 大规模可再生能源及电动汽车的接入会影响整个电力系统的用电平衡,为提高可再生能源利用率并均衡负荷用电,提出一种面向虚拟电厂并考虑电动汽车充电需求的负荷均衡管理策略。首先,根据各类负荷及分布式电源的电力数据计算电力供需差额及电网的电力平衡关系。在考虑可再生能源使用效率和电动汽车充电需求的基础上,采用所提出的分层电力调度系统对用电负荷进行调度。此外,提出一种实时功率跟踪机制来处理可再生能源发电、电力负荷和电动汽车充电的预测误差。最后,通过算例验证该方案的有效性和适用性,结果表明构建考虑电动汽车充电需求的虚拟电厂并融合多类资源,可发挥互补效应,实现虚拟电厂的负荷均衡管理,从而增强电能交互整体的平稳性,保障系统的安全性和经济性。Abstract: The access of large-scale renewable energy and electric vehicles will affect the power balance of the entire power system.In order to improve the utilization rate of renewable energy and balance the load consumption, this paper proposes a load balance management strategy for virtual power plants and the charging demand of electric vehicles is considered. Firstly, electricity demand-supply gap and the power balance of the grid are calculated according to the power data of various loads and distributed power sources. On the basis of considering renewable energy efficiency and electric vehicle charging demand, the proposed hierarchical power dispatching system is used to schedule power load. In addition, a real-time power tracking mechanism is proposed to deal with the prediction errors of renewable energy generation, power load and electric vehicle charging. Finally, an example is given to verify the effectiveness and applicability of the proposed scheme. It is shown that constructing a virtual power plant considering electric vehicle charging demand and integrating multiple resources can give full play to the complementary effect and realize load balance management of the virtual power plant, thus enhancing the overall smoothness of power interaction and ensuring the safety and economy of the system.