区域能源互联网多能协同优化中的储能效益评估

能源互联网通过横向的多能互补和纵向“源-网-荷-储”的高度协调实现能量的高效利用,被视作未来智能电网的发展形态。为评估多元储能配置在区域能源互联网(regional energy Internet,REI)多能协同优化中产生的效益,首先对区域能源互联网的架构进行了分析;接着以多元储能模型、多能耦合设备模型和能源路由器(energy router,ER)模型为基础,构建了多能耦合的储能系统模型;然后从峰谷差效益、环境效益和降低能量损耗效益3个方面提出了储能的效益评估模型,并给出了相应评估指标;最后以一个含电、气、热负荷的商业型REI为算例进行了储能效益计算,分析了不同容量与不同类型的储能配置对REI产生效益的影响,同时验证了所提指标的有效性,为REI中储能的配置与相关市场机制的建立提供了指导。

Benefit Evaluation of Energy Storage in Multi-energy Collaborative Optimization of Regional Energy Internet

The energy Internet is regarded as the development form of smart grid in the future by realizing horizontal multi-energy complementation and vertical high coordination of "source-grid-load-storage" to achieve efficient energy utilization. In order to evaluate the benefits of multi-energy storage configuration in regional energy Internet (REI) multi-energy collaborative optimization, the architecture of regional energy Internet is analyzed firstly, and then on the basis of the multi-energy storage model, multi-energy coupling device model and energy router (ER) model, a multi-energy coupling energy storage system model is constructed. Then, the benefit evaluation model of energy storage is proposed from three aspects of peak-valley difference benefit, environmental benefit and energy-loss reduction benefit, and the corresponding evaluation indices are given. Finally, a commercial REI with electricity, gas and heat load is taken as an example to calculate the energy storage benefit, and different capacity and different types of energy consumption are analyzed and the effectiveness of the proposed index is verified. The results provide guidance for the allocation of energy storage in REI and the establishment of relevant market mechanism.