考虑地理分散的数据中心服务器频率调节的电网降损模型

A Model Aimed at Reducing Power Net Loss Considering Frequency Scaling of Servers in Geo-distributed Data Centers

当前,数据中心能耗得到日益广泛的关注。电力网络和数据网络通过数据中心而紧密相关。为了挖掘电力市场环境下数据中心用电作为一种体量大的电力负荷参与电网运行、改善电网运行状态的潜力,首先分析以数据网络负载迁移替代电能转移的现实依据,然后以电网网损最低为目标,对数据中心间网络负载的分配进行研究。基于服务器CPU的工作状态,建立数据中心用电负荷的模型,并给出处理网络负载需遵循的服务质量约束。在IEEE-30节点系统中,利用基于自然选择的粒子群算法对算例进行求解与分析,验证了所提想法的可行性,并分析了网络负载响应时间约束等因素对结果的影响。

The increasing power consumption of the internet data centers has raised concern in recent years.The power grid and the data network are closely related through the distributed data centers.In order to find out the potential of the considerable power consumption of the data center to participate in power grid operation and improve the state of the grid operation under the circumstance of electricity market,the realistic basis for replacing power transfer with data network workload migration was analyzed.Then,the allocation of requests at the data network level was researched,aimed at optimizing the power flow.The power model of the data center based on the operating status of the servers’CPU was presented at first,the QoS constraints that a data center has to follow when dealing with the allocated workload was modeled.An example of IEEE30 system was presented and analyzed.The experimental result proves the feasibility of the proposed idea,and the influencing factors including the constraint of workload response time is analyzed as well.