单相非隔离型光伏逆变器

发布时间：2018-04-12 06:33

本文选题：光伏并网发电 + MPPT　；参考：《安徽理工大学》2017年硕士论文

【摘要】：太阳能,作为一种可再生、无害、安全、可靠的新能源,它巨大的优势已在国际社会上达成共识。因此,在新能源开发领域,光伏并网发电系统已经成为该领域一个研究热点。单相光伏并网发电系统的技术要点包括最大功率点的跟踪控制技术、锁相环技术、孤岛检测技术、直流分量的抑制以及并网逆变系统的控制策略。本文主要工作包括:1.分析几种常见的最大功率点跟踪控制方法(MPPT),并对恒定电压法,扰动法和电导法进行原理分析,利用MATLAB软件对扰动法和电导法进行了仿真分析;简述了全桥电路的直流分量的抑制方法;介绍孤岛效应产生的原因及其检测方法:主动检测和被动检测;对锁相环技术进行分析。2.进行硬件电路设计:对全桥电路和硬件采样电路进行了系统的设计,其中硬件电路包括Boost电路,采样保护电路和驱动电路。3.分析了 PI和PR控制策略的优缺点,并提出PI控制(电压前馈)技术,并建立了仿真模型进行仿真和分析。
[Abstract]:Solar energy, as a renewable, harmless, safe and reliable new energy, its huge advantages have been agreed in the international community.Therefore, in the field of new energy development, photovoltaic grid-connected power generation system has become a research hotspot in this field.The main technical points of single-phase photovoltaic grid-connected generation system include maximum power point tracking control technology, phase-locked loop technology, islanding detection technology, DC component suppression and control strategy of grid-connected inverter system.The main work of this paper includes: 1.The principle of constant voltage method, perturbation method and conductance method are analyzed, and the perturbation method and conductance method are simulated by MATLAB software.The suppression method of DC component of full-bridge circuit is briefly introduced, the cause of islanding effect and its detection methods are introduced, the active detection and passive detection are introduced, and the phase-locked loop technology is analyzed. 2.Hardware circuit design: the whole bridge circuit and the hardware sampling circuit are designed. The hardware circuit includes Boost circuit, sampling protection circuit and driving circuit.The advantages and disadvantages of Pi and PR control strategies are analyzed, and Pi control (voltage feedforward) technology is proposed, and a simulation model is established for simulation and analysis.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM464

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