考虑电动汽车虚拟电厂灵活性和高比例光伏接入的配电网规划

Distribution Network Planning Considering the Flexibility of EV Virtual Power Plants and High Penetration of PV

以包含高比例光伏和规模化电动汽车(electric vehicle,EV)的配电网规划为研究对象,首先对电动汽车虚拟电厂进行灵活性量化,然后建立了综合考虑电动汽车虚拟电厂灵活性与高比例光伏接入的配电网规划模型。模型以配电网线路年综合投资成本最小为目标,同时兼顾新能源消纳、储能系统投资成本和电动汽车虚拟电厂灵活性补偿成本,以期在提升配电网规划经济性的同时实现电力系统“削峰填谷”,并提高光伏出力消纳率。最后以IEEE RTS-24节点配电网系统为例进行仿真验证,算例表明,所提规划模型利用储能系统和电动汽车灵活性降低了系统的规划运行成本,并提高了配电网内部光伏电站的消纳率,能够对未来包含高比例可再生能源和虚拟电厂灵活性资源的电力系统规划提供借鉴和参考。

This paper studies the distribution network planning problem which considers high proportion of photovoltaic power and large-scale electric vehicles(EVs).Firstly,the paper quantifies the flexibility of the EV virtual power plant,and then establishes a distribution network planning model that comprehensively considers the flexibility of the EV virtual power plant and the high proportion of photovoltaic access.The model aims to minimize the annual investment cost of distribution network lines,while taking into account renewable energy consumption,investment costs of energy storage system and flexibility compensation costs of EV virtual power plant,in order to improve the economy of distribution network planning and realize peak shaving and valley filling of power system and improve the photovoltaic output consumption rate.Finally,the IEEE 24-node distribution network system is taken as an example for simulation verification.The example shows that the planning model proposed in this paper uses the flexibility of the energy storage system and electric vehicles to reduce the planning and operation cost of the system and improves the consumption rate of the photovoltaic power station in the distribution network.The model can provide reference for future power system planning including high penetration of renewable energy and virtual power plant flexibility resources.