数据中心直流供电系统研究

发布时间：2018-03-20 06:52

本文选题：绿色数据中心　切入点：直流供电　出处：《华北电力大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着大数据时代的到来,互联网产品和服务需求量与日俱增,作为大量数据承载和信息媒体传输的数据中心的重要枢纽地位越来越突出,而数据中心的供电系统能耗高和稳定性不高成为亟待解决的问题。在此背景下,考虑节能环保,减少数据中心机房建设成本,将新能源引入供电系统,设计了含光伏发电、储能装置、交流电网、负荷的数据中心直流供电系统的架构,形成了绿色数据中心直流供电系统。为了保证系统安全稳定运行,重点对系统的运行控制和能量管理进行了研究。对数据中心供电系统的结构进行了分析,包括传统数据中心UPS供电系统结构、传统数据中心交流母线供电系统和传统数据中心直流母线供电系统结构,并分析了各自供电系统的优缺点。设计了绿色数据中心直流供电系统的拓扑结构,分析了供电系统的组成单元以及光伏电池数学模型和特性曲线。针对光伏系统、储能单元的仿真模型进行了详细设计,为研究提供了系统的运行控制仿真平台。设计了绿色数据中心直流供电系统的直流母线与电网接口单元、光伏接口单元、储能系统的运行控制策略,同时对各接口单元的电路结构进行了设计。并详细分析了直流母线与电网接口单元的稳压、限流控制模式,光伏发电单元的MPPT、稳压控制模式以及储能系统的稳压、恒流控制模式和待机模式。同时重点研究了各接口单元的控制原理和适用状态。各系统的控制策略的正确性和有效性在系统整体运行控制仿真中得到了验证。通过对直流供电系统能量平衡计算,得到了母线等效模型以及母线电压与系统能量的关系。并根据母线电压稳定控制将系统进行了模式划分。在Matlab/Simulink软件系统构建了仿真模型,对系统在并网和孤岛模式下的运行结果进行了分析,针对系统稳定运行提出与之相适应的能量管理策略,实现了供电单元和负载的能量合理流动,保证了直流供电系统高效稳定的工作。
[Abstract]:With the arrival of big data's era, the demand for Internet products and services is increasing day by day. As an important hub for carrying large amounts of data and transmitting information media, the status of Internet products and services is becoming more and more prominent. However, the high energy consumption and low stability of the power supply system in the data center have become an urgent problem to be solved. In this context, considering the energy saving and environmental protection, reducing the construction cost of the data center's computer room, introducing new energy into the power supply system, the photovoltaic power generation is designed. The structure of energy storage device, alternating current network, load data center DC power supply system forms the green data center DC power supply system. The operation control and energy management of the system are mainly studied. The structure of the power supply system in the data center is analyzed, including the structure of the traditional UPS power supply system in the data center. The AC busbar power supply system of the traditional data center and the DC busbar power supply system structure of the traditional data center are analyzed, and the advantages and disadvantages of their respective power supply systems are analyzed. The topology structure of the DC power supply system in the green data center is designed. The components of the power supply system and the mathematical model and characteristic curve of the photovoltaic cell are analyzed. The simulation model of the photovoltaic system and the energy storage unit are designed in detail. The operation control simulation platform of the system is provided, and the operation control strategy of the DC bus and grid interface unit, photovoltaic interface unit and energy storage system of the green data center DC power supply system is designed. At the same time, the circuit structure of each interface unit is designed, and the voltage stabilization, current limiting control mode, MPPTT, voltage stabilizing control mode and energy storage system of DC bus and grid interface unit are analyzed in detail. Constant current control mode and standby mode. At the same time, the control principle and applicable state of each interface unit are studied emphatically. The correctness and effectiveness of control strategy of each system are verified in the simulation of the whole operation control of the system. Calculation of the energy balance of the DC power supply system, The busbar equivalent model and the relationship between bus voltage and system energy are obtained, and the system mode is divided according to the bus voltage stability control. The simulation model is constructed in the Matlab/Simulink software system. The operation results of the system in grid-connected and islanding mode are analyzed. The energy management strategy suitable for the stable operation of the system is put forward, and the reasonable energy flow of the power supply unit and load is realized. It ensures the high efficiency and stability of DC power supply system.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP308;TM72

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