绿色数据中心的供电运行控制和能量管理

将可再生能源引入数据中心高压直流UPS供电系统,形成直流微网的供电方式。基于此设计了一种分层系统运行控制和能量管理策略,旨在实现系统可靠运行和能量优化利用。微网由电网、光伏发电单元、储能电池和数据中心计算负荷组成,设备级控制考虑并网和孤岛2种运行方式划分为4种工作模式,光伏boost变换器有MPPT和降功率稳压2种工作状态,网侧双向变换器通过电流前馈解耦实现双环控制,该层采用母线电压协调控制方法切换各变换器的工作状态,以维持供电系统的有功功率平衡实现系统稳定。系统级控制通过自上而下的调度决策优化运行,在供电系统控制策略中结合数据中心能耗管理方法,以更大程度地优化能源管理。最后,建模仿真验证了所述策略的可行性。

Power Supply Operation Control and Energy Management in Green Data Center

Renewable energy is introduced into the high voltage direct current (HVDC) uninterruptible power supply (UPS) system used in a data center to form a power supply mode of DC micro-grid. On this basis, a hierarchical system operation control and energy management strategy is designed to achieve reliable system operation and optimal energy utilization. The micro-grid consists of power grid, a photovoltaic (PV) power generation unit, an energy storage battery and data center computing load. The equipment-level control considers two operation modes, i.e., grid connection and islanding, which are divided into four working modes. The PV boost converter has two working states, i.e., maximum power point tracking (MPPT) and power reduction, while the grid-side bidirectional converter realizes double-loop control through curr-ent feedforward decoupling. This layer uses a bus voltage coordination control method to switch the operating states of each converter, thereby maintaining the active power balance of the power supply system and achieving system stability. The system-level control optimizes operation through a top-down scheduling decision-making. The control strategy for power supply system combines the management method for data center energy consumption, to optimize energy management. Finally, modeling and simulations verify the feasibility of the proposed strategy.