大功率光伏并网逆变器的研究与设计-控制科学与工程专业论文.docx

大功率光伏并网逆变器的研究与设计 摘 要 本文以天津诺尔哈顿电气有限公司的 100MWp 光伏并网项目为背景，开发了一款 100KW 的样机，在设计过程中掌握了很多技术资料，对于研究一系列的大功率逆变器有很好的借 鉴意义。 本文第一章简要介绍了本课题的背景意义和国内外的发展趋势，以及大功率光伏并网 逆变器所处的系统环境；第二章介绍了大功率光伏并网逆变器的关键技术，包括拓扑结构、 控制策略、最大功率点跟踪控制和反孤岛效应，重点介绍了本系统的控制策略：电压外环 和电流内环的双闭环控制方式；第三章，根据实际应用的需求，采用 TMS320LF2808A 型号 DSP 作为系统的控制主芯片，因为大功率逆变器和中小功率有很大的差异性，所以专门对 器件选型、硬件电路、软件编程、柜体结构等要素进行了设计；第四章展示了实验结果， 包括样机的控制板、信号采集板、驱动板、开关器件模块，以及并网电流波形图；最后一 章总结过去的研究工作，并且对以后需要深入开发的部分进行了展望。 通过对样机运行情况的观测和研究，所得结论是:大功率光伏并网逆变器的各种设计 思想是可行的。样机运行稳定可靠，并且得到了高质量的并网电流波形，各项运行指标都 满足国家标准要求。 关键词：光伏，并网逆变器，最大功率点跟踪，反孤岛效应 i RESEARCH AND DESIGN HIGH-POWER PHOTOVOLTAIC GRID-CONNECTED INVERTER ABSTRACT This thesis develops a 100KW photovoltaic which takes 100MWp photovoltaic grid-connected project of Tianjin Noel Electrical Company as the background, Mastered a lot of technical information in the design process, there is a good reference for the study of a series of high-power inverter. The first chapter briefly introduces the topic background significance and domestic and international trends, as well as high-power photovoltaic grid-connected inverter system in which the environment; Chapter II describes the key technologies of high-power photovoltaic grid-connected inverter, including topology, control strategy, the maximum power point tracking control and anti-island effect, Focuses on the system control strategy: the voltage outer and the inner current loop dual closed-loop control mode; Chapter III, according to the actual application，Using the TMS320LF2808A models DSP main chip as the control system, power inverter and a lot of small and medium power differences, so specialized device selection, hardware circuits, software programming, cabinet structure elements the design; Chapter IV shows the experimental results, including the control panel of the prototype, signal acquisition board, driver board, switch device modules, and grid current waveforms; The final chapter summarizes past research work, and the after part of the in-dep