光伏储能应急电源系统的研制

发布时间：2018-06-24 04:57

  本文选题：应急电源 + 逆变电源　； 参考：《电子科技大学》2015年硕士论文

【摘要】：在现代社会中,电力供应对人们日常生活的影响越来越大。应急电源可以在公用电网中断时为负载持续供电,保障了用户在对电能的需求,因而应用越来越广泛。近年来,随着太阳能发电技术的发展,将太阳能发电技术应用到蓄电池储能系统逐渐成为应急电源发展的一个重要趋势。本文对光伏储能应急电源系统进行了研究,系统由光伏充电系统,常规充电系统和逆变电源系统构成。利用太阳能充电系统和常规式充电系统完成了蓄电池的储能,多样的充电方式使应急电源系统的可靠性和供电质量大大提高,延长了供电时间。首先,介绍了光伏储能应急电源系统的总体设计方案,阐述了应急电源系统的构成和工作原理,对不同情况下应急电源的工作过程做了具体的说明,并说明了技术指标和各组成部分的设计要求。其次,对应急电源的逆变系统进行了详细的分析。根据技术指标,选择升压-逆变电路作为主电路拓扑。确定了逆变电路和Boost电路的拓扑结构,详细分析了开关管,电感电容等元器件的选型,给出了推导公式。阐述了开关管驱动电路的设计。同时,介绍了逆变电路的SPWM控制原理,说明了SPWM波的生成过程。设计了电压负反馈闭环控制系统,确保了逆变器输出了稳定。给出了系统软件设计的流程图。第三,介绍了蓄电池组的充电电路。说明了蓄电池的充电特性。通过对各个充电方法的比较,选取了“恒压-恒流-浮充”三段式充电方法。并设计了充电电路。构建了电池电压和电流采样电路,组成了三段式充电系统。通过蓄电池的充电实验,验证了充电方法的可行性。第四,对光伏电池的原理做了详细的说明。给出了光伏电池的等效模型和详细的推导公式。根据数学模型,确定了光伏电池的输出特性。比较了常见的几种MPPT控制方法,选择了扰动观察法。给出了通过光伏电池对蓄电池充电的充电电路和控制框图,并在Matlab/simulink中进行了建模和仿真,确定的光伏储能充电方法的有效性。最后,建立了应急电源的实验样机。对逆变电路和充电电路进行了联合调试.通过对驱动和输出的波形的观察,证明应急电源达到了了设计的技术指标,实现了预期的功能。
[Abstract]:In modern society, electricity supply has more and more influence on people's daily life. The emergency power supply can supply the load continuously when the public power network is interrupted, which ensures the user's demand for electric energy, so it is used more and more widely. In recent years, with the development of solar power generation technology, the application of solar power generation technology to battery energy storage system has gradually become an important trend of the development of emergency power supply. In this paper, the photovoltaic energy storage emergency power supply system is studied. The system consists of photovoltaic charging system, conventional charging system and inverter power supply system. Solar charging system and conventional charging system are used to store energy of battery. The reliability and power supply quality of emergency power supply system are greatly improved by various charging methods and the power supply time is prolonged. First of all, the paper introduces the overall design scheme of the photovoltaic energy storage emergency power supply system, expounds the structure and working principle of the emergency power supply system, and gives a specific explanation of the working process of the emergency power supply under different conditions. The technical specifications and the design requirements of each component are also described. Secondly, the inverter system of emergency power supply is analyzed in detail. According to the technical specifications, the boost-inverter circuit is selected as the main circuit topology. The topology of inverter circuit and boost circuit is determined, and the selection of switch, inductance and capacitance is analyzed in detail, and the derivation formula is given. The design of switch-tube drive circuit is described. At the same time, the SPWM control principle of inverter circuit is introduced, and the generation process of SPWM wave is explained. A voltage negative feedback closed loop control system is designed to ensure the output stability of the inverter. The flow chart of system software design is given. Thirdly, the charging circuit of battery group is introduced. The charging characteristics of battery are explained. Through the comparison of various charging methods, the "constant voltage-constant current-floating charging" three-stage charging method is selected. The charging circuit is designed. A battery voltage and current sampling circuit is constructed, and a three-stage charging system is formed. The feasibility of the charging method is verified by the battery charging experiment. Fourthly, the principle of photovoltaic cells is explained in detail. The equivalent model and derivation formula of photovoltaic cell are given. According to the mathematical model, the output characteristics of photovoltaic cells are determined. Several common MPPT control methods are compared, and disturbance observation method is chosen. The charging circuit and control block diagram of battery charging by photovoltaic cell are given, and the modeling and simulation in Matlab / Simulink are carried out. The validity of the method is determined. Finally, the experimental prototype of emergency power supply is established. The inverter circuit and charging circuit are debugged jointly. Through the observation of the driving and output waveforms, it is proved that the emergency power supply has achieved the technical target of the design and realized the expected function.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM914.4
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本文编号：2060114