本文選題：綠色數據中心　切入點：直流供電　出處：《華北電力大學》2017年碩士論文　論文類型：學位論文

【摘要】：隨著大數據時代的到來,互聯網產品和服務需求量與日俱增,作為大量數據承載和信息媒體傳輸的數據中心的重要樞紐地位越來越突出,而數據中心的供電系統(tǒng)能耗高和穩(wěn)定性不高成為亟待解決的問題。在此背景下,考慮節(jié)能環(huán)保,減少數據中心機房建設成本,將新能源引入供電系統(tǒng),設計了含光伏發(fā)電、儲能裝置、交流電網、負荷的數據中心直流供電系統(tǒng)的架構,形成了綠色數據中心直流供電系統(tǒng)。為了保證系統(tǒng)安全穩(wěn)定運行,重點對系統(tǒng)的運行控制和能量管理進行了研究。對數據中心供電系統(tǒng)的結構進行了分析,包括傳統(tǒng)數據中心UPS供電系統(tǒng)結構、傳統(tǒng)數據中心交流母線供電系統(tǒng)和傳統(tǒng)數據中心直流母線供電系統(tǒng)結構,并分析了各自供電系統(tǒng)的優(yōu)缺點。設計了綠色數據中心直流供電系統(tǒng)的拓撲結構,分析了供電系統(tǒng)的組成單元以及光伏電池數學模型和特性曲線。針對光伏系統(tǒng)、儲能單元的仿真模型進行了詳細設計,為研究提供了系統(tǒng)的運行控制仿真平臺。設計了綠色數據中心直流供電系統(tǒng)的直流母線與電網接口單元、光伏接口單元、儲能系統(tǒng)的運行控制策略,同時對各接口單元的電路結構進行了設計。并詳細分析了直流母線與電網接口單元的穩(wěn)壓、限流控制模式,光伏發(fā)電單元的MPPT、穩(wěn)壓控制模式以及儲能系統(tǒng)的穩(wěn)壓、恒流控制模式和待機模式。同時重點研究了各接口單元的控制原理和適用狀態(tài)。各系統(tǒng)的控制策略的正確性和有效性在系統(tǒng)整體運行控制仿真中得到了驗證。通過對直流供電系統(tǒng)能量平衡計算,得到了母線等效模型以及母線電壓與系統(tǒng)能量的關系。并根據母線電壓穩(wěn)定控制將系統(tǒng)進行了模式劃分。在Matlab/Simulink軟件系統(tǒng)構建了仿真模型,對系統(tǒng)在并網和孤島模式下的運行結果進行了分析,針對系統(tǒng)穩(wěn)定運行提出與之相適應的能量管理策略,實現了供電單元和負載的能量合理流動,保證了直流供電系統(tǒng)高效穩(wěn)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.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP308;TM72

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