考虑数据中心用能时空可调的电-气互联综合能源系统分布式光伏最大准入容量计算

Calculation of Maximum Allowable Access Capacity of Distributed Photovoltaic in Electricity-gas Integrated Energy System Considering Spatio-temporal Adjustability of Energy Consumption by Data Centers

在数字经济背景下,数据中心日益增长的用能规模和灵活迅速的负荷调节能力引起了广泛关注。为促进分布式清洁能源的消纳,本文提出一种考虑数据中心用能时空可调的电-气互联综合能源系统分布式光伏最大准入容量计算方法。首先,对数据中心能耗及运行特性进行建模,并分析数据中心用能时空可调特性;然后,在计及电-气能源网络安全约束的前提下,构建集成数据中心的电-气互联综合能源系统分布式光伏最大准入容量优化模型,利用凸松弛技术和增量分段线性化方法将模型转化为混合整数二阶锥模型求解。最后,在97节点电网和11节点气网算例中,验证了考虑数据中心用能时空可调特性对分布式光伏消纳的促进作用,并分析了电-气能源网络安全约束对分布式光伏最大准入容量的影响。

Under the background of digital economy,the energy consumption by data centers has attracted extensive attention because of its increasing scale and flexible and rapid load adjustability.To promote the accommodation of distributed clean energy,a calculation method for the maximum allowable access capacity of distributed photovoltaic(PV)in an electricity-gas integrated energy system is proposed considering the spatio-temporal adjustability of energy consumption by data centers.First,the energy consumption by data centers and the operating characteristics are modeled,and the corresponding spatio-temporally adjustable characteristics are analyzed.Then,considering the security constraints of electricity-gas networks,an optimization model of maximum allowable access capacity of distributed PV in the electricity-gas integrated energy system with data centers is constructed,which is further transformed into a mixed integer second-order cone model through the convex relaxation technology and incremental piecewise linearization method.Finally,the effect of considering the spatio-temporally adjustable characteristics of energy consumption by data centers on promoting distributed PV accommodation is verified by an example consisting of a 97-bus power network and a 11-bus gas network,and the influence of security constraints of electricity-gas energy networks on the maximum allowable access capacity of distributed PV is also analyzed.