基于iDLMP方法的用户侧灵活性资源电能-备用优化运行

Power-reserve optimal operation of user-side flexible resources based on iDLMP method

充分利用用户侧分布式能源(DER)的灵活性是改善以新能源为主体的新型电力系统灵活性不足的有效途径之一。搭建含有高比例DER的电力系统市场化运行框架;基于通用虚拟电池模型,建立含有分布式储能系统、电动汽车与光伏的聚合商优化运行模型,进一步考虑配电网安全运行约束,建立配电系统运营商优化运行模型,基于此,提出协调优化聚合商能量计划与备用容量计划的迭代型配电网节点边际价格方法。算例结果表明,所提模型和方法可以在考虑用户设备资源信息安全的前提下有效解决DER因电力市场能量价格与备用容量价格过高或过低引起的线路双向过载问题。

Fully using the flexibility of user-side DER(Distributed Energy Resource)is one of the effective ways to improve the flexibility shortage of new power system with renewable energy as the main body.A marketization operation framework is built for power system with high proportion of DER.Based on the generalized virtual battery model,an optimal operation model of aggregator with distributed energy storage system,electric vehicle and photovoltaic is established,the secure operation constraints of distribution network are furthermore considered,an optimal operation model of distribution system operator is established.Based on this,an iterative distribution locational marginal price method is proposed,which coordinates and optimizes the energy plan and reserve capacity plan of the aggregators.The case results show that the proposed model and method can effectively solve the two-directional overloading problem of lines caused by DER for too high or too low price of electric energy and reserve capacity in the electricity market on the premise of considering the information security of users’device resource.