本文選題：多端口變換器　切入點：直流微網(wǎng)　出處：《揚州大學》2016年碩士論文

【摘要】：多端口變換器(Multiport Power Electronic Interface,MPEI)是直流微電網(wǎng)絡(luò)中的有源節(jié)點,可以將分布式能源及其必要的儲能設(shè)備結(jié)合,實現(xiàn)發(fā)電、儲能、用電過程的綜合控制和統(tǒng)一管理。本研究以連接光伏能源、儲能裝置和終端負載的直流微網(wǎng)系統(tǒng)為研究背景,針對Buck-Boost型的MPEI,進行多端口變換器的底層控制系統(tǒng)設(shè)計和功率管理研究。提出了以Buck-Boost為基本功率單元的拓撲結(jié)構(gòu),并分析了該MPEI的PWM工作模式：進而以此工作模式為依據(jù),針對直流微網(wǎng)各端口的特性,利用狀態(tài)空間平均法和小信號分析法得出滿足各端口應(yīng)用要求的數(shù)學模型。針對光伏端口的特性,提出了最大功率跟蹤(MPPT)策略；分析了MPEI的電路參數(shù)和控制對象特性,探討了母線電壓控制和直流潮流管理的需求,設(shè)計了可以連通一個光伏、雙儲能單元和直流微網(wǎng)母線的MPEI控制系統(tǒng),并在此基礎(chǔ)上針對每個控制目標進行控制系統(tǒng)設(shè)計；引入主動均流因子實現(xiàn)對瞬時電流的快速、有效分配,并通過MATLAB/SIMULINK的控制模塊仿真和Simulink-PLECS聯(lián)合仿真驗證了控制系統(tǒng)設(shè)計和電路運行性能。闡述了利用MPEI對多組儲能裝置進行潮流分配的必要性并將功率管理機制嵌入控制算法設(shè)計之中,實現(xiàn)了對瞬態(tài)能量的綜合管理。運用控制理論設(shè)計并制作了由多端口變換器構(gòu)建的直流微網(wǎng)樣機,實驗結(jié)果表明,樣機驗證了系統(tǒng)設(shè)計的正確性、母線電壓控制策略的有效性；同時證明了該MPEI設(shè)計具備瞬態(tài)能量管理功能,驗證了該潮流分配控制方案的可行性。
[Abstract]:Multiport Power Electronic Interface (MPEI) is an active node in DC microelectric network. It can combine distributed energy and necessary energy storage equipment to generate and store energy. Integrated control and unified management of electrical processes. The research background of this study is the DC microgrid system which connects photovoltaic energy, energy storage device and terminal load. In this paper, the bottom control system design and power management of multi-port converter are studied in view of MPEI of Buck-Boost type. The topology structure of Buck-Boost as the basic power unit is proposed, and the PWM operation mode of the MPEI is analyzed, which is based on the operation mode. According to the characteristics of each port of DC microgrid, the state space averaging method and the small signal analysis method are used to obtain the mathematical model to meet the requirements of each port. According to the characteristics of the photovoltaic port, the maximum power tracking (MPPTT) strategy is proposed. The circuit parameters and control object characteristics of MPEI are analyzed. The requirements of bus voltage control and DC power flow management are discussed. A MPEI control system which can connect a photovoltaic, dual energy storage unit and DC microgrid bus is designed. On the basis of this, the control system is designed for each control object, and the active current sharing factor is introduced to realize the fast and effective distribution of instantaneous current. The design of the control system and the performance of the circuit are verified by the simulation of the control module of MATLAB/SIMULINK and the joint simulation of Simulink-PLECS. The necessity of using MPEI to distribute the power flow of the multi-group energy storage device is expounded, and the power management mechanism is embedded in the design of the control algorithm. The control theory is used to design and manufacture the DC microgrid prototype constructed by multi-port converter. The experimental results show that the system design is correct and the bus voltage control strategy is effective. At the same time, it is proved that the MPEI design has the function of transient energy management, and the feasibility of the power flow allocation control scheme is verified.
【學位授予單位】：揚州大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TM46

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本文編號：1656369