光伏并网微型逆变器的研究与设计

发布时间：2018-04-09 02:23

本文选题：微型光伏逆变器　切入点：交错反激　出处：《东北大学》2014年硕士论文

【摘要】：随着21世纪的到来,人口不断增加,传统的化石能源,如煤炭,石油,天然气等日益紧张。而且环境污染日趋严重,特别是近两年来的全国范围内的霾天气,让人们逐渐的意识到新能源在当今全球范围内的重要作用与地位。而其中,最为引人关注的就是太阳能。太阳能作为一种资源丰富,分布广泛的可再生能源,在当今倡导可持续发展的社会中,是最具发展潜力的可再生能源。而太阳能并网逆变技术是光伏发电系统的关键技术。因此深入的对此进行研究具有重大的理论与实际意义。本文的研究重点是作为微型光伏并网发电系统中的极其重要的技术环节的逆变器的设计和实现。主要内容可以归纳为以下几个方面：(1)通过比较分析目前常用的光伏逆变器的拓扑结构,设计了一种基于并联交错反激有源钳位拓扑的光伏逆变并网微型逆变器系统。(2)根据光伏系统的要求,设计了电流环补偿器,并设计了MPPT算法和PLL并网控制方法,使得输出与电网电压同频同相。并实现了孤岛检测。(3)利用MATLAB/SIMULINK对光伏电池和光伏并网系统进行建模和仿真,验证系统的控制效果。(4)根据设计的技术参数设计电路,实现了硬件和软件的设计。其中,硬件部分包括控制主电路、驱动电路、采样电路、辅助电源电路；软件部分包括了MPPT与PLL算法的实现、电流环补偿器的实现、负载共享控制与孤岛检测保护。其中,微处理器采用了PIC公司的16bit的数字信号控制器dsPIC33FJ16GS504进行设计。(5)对制作好的系统进行整体测试,给出实际测得的波形与数据,并总结得出相应结论。并对本次毕设进行总结。
[Abstract]:With the arrival of the 21st century, the population is increasing, the traditional fossil energy, such as coal, oil, natural gas and so on is increasingly tense.And environmental pollution is becoming more and more serious, especially the haze weather in the last two years, which makes people gradually realize the important role and status of new energy in the global scope.Among them, the most interesting is solar energy.Solar energy, as a kind of renewable energy with rich resources and wide distribution, is the most potential renewable energy in the society that advocates sustainable development.Solar grid-connected inverter technology is the key technology of photovoltaic power generation system.Therefore, the in-depth study of this has great theoretical and practical significance.The emphasis of this paper is the design and implementation of inverter, which is an important technical link in miniature photovoltaic grid-connected generation system.The main contents can be summarized as follows: 1) by comparing and analyzing the topology of the photovoltaic inverter commonly used at present,A photovoltaic inverter grid-connected miniature inverter system based on parallel interleaved flyback active clamp topology is designed. According to the requirements of photovoltaic system, the current loop compensator is designed, and the MPPT algorithm and PLL grid-connected control method are designed.The output is in the same frequency and phase as the grid voltage.The model and simulation of photovoltaic cell and photovoltaic grid-connected system are realized by using MATLAB/SIMULINK. The control effect of the system is verified. The circuit is designed according to the technical parameters and the design of hardware and software is realized.The hardware includes main control circuit, driving circuit, sampling circuit and auxiliary power supply circuit. The software part includes the implementation of MPPT and PLL algorithm, the realization of current loop compensator, load sharing control and islanding detection protection.The microprocessor uses 16bit digital signal controller (dsPIC33FJ16GS504) of PIC Company to design the whole system. The waveform and data are given and the corresponding conclusions are drawn.At the same time, the conclusion of this project is given.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM615;TM464

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