光伏并网系统控制策略与孤岛检测技术的研究

发布时间：2018-04-25 11:01

本文选题：太阳能 + 并网发电　；参考：《辽宁工程技术大学》2014年硕士论文

【摘要】：随着现代经济的不断发展进步,不可再生能源将逐渐枯竭,探索新能源对人类的发展有着重要的意义。太阳能以其自身的优势,是未来可大力开发利用的清洁新能源,光伏并网发电技术的本质就是将太阳能发电系统和电网连接起来,实现光伏发电并网,在此对光伏并网技术作了进一步研讨。首先,对太阳能技术发展和利用的背景,以及本文研究的意义进行了说明,对光伏并网的系统结构和重要技术进行了探讨,提出了无变压器的两级结构的并网方式。其次,针对并网发电系统中常见的孤岛效应,本文对反孤岛效应作了深入研究,对孤岛效应主动检测法中主动频率偏移法和相位偏移法的进行了仿真对比,得出相位偏移法的在孤岛检测上使电网供电的质量更高。最后,对于光伏并网策略提出了基于细菌觅食优化算法的双闭环控制方案,并对设计方案进行了验证。设计了基于TMS320LF2407型号的DSP的单相光伏并网发电系统,对其硬件和软件进行了分析,为系统的研发和设计提供了一个可靠的实验平台。
[Abstract]:With the continuous development and progress of modern economy, non-renewable energy will gradually dry up. It is of great significance to explore new energy for the development of human beings. Solar energy, with its own advantages, is a clean and new energy that can be developed and utilized in the future. The essence of photovoltaic grid-connected power generation technology is to connect solar power generation system with power grid to realize grid-connected photovoltaic power generation. In this paper, the photovoltaic grid-connected technology is further discussed. Firstly, the background of the development and utilization of solar energy technology and the significance of the research in this paper are explained, the system structure and important technology of grid-connected photovoltaic system are discussed, and the grid-connected mode of two-stage structure without transformer is put forward. Secondly, aiming at the common islanding effect in grid-connected power generation system, the anti-islanding effect is deeply studied in this paper, and the active frequency offset method and the phase offset method in the active detection method of islanding effect are simulated and compared. It is concluded that the phase shift method can improve the quality of power supply in islanding detection. Finally, a double closed loop control scheme based on bacterial foraging optimization algorithm is proposed for photovoltaic grid-connected strategy, and the design scheme is verified. The single-phase photovoltaic grid-connected generation system based on TMS320LF2407 model DSP is designed, and its hardware and software are analyzed, which provides a reliable experimental platform for the research and design of the system.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM615

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