光伏并网逆变器孤岛检测技术研究及实现
发布时间：2018-07-29 19:18
【摘要】：随着工业化的深入,能源与环境是人类无法回避的问题。各类新能源技术成为各国的研究重点,光伏发电作为太阳能的重要利用方式成为新能源技术的重要研究方向。孤岛检测作为光伏并网逆变器必备的一项功能,成为并网发电领域的重要研究方向。本文以非隔离型单相光伏并网逆变器为研究基础,对孤岛检测技术及并网控制方式进行研究。 本文阐述了孤岛检测技术的意义和研究现状,在对比分析了现有检测标准,评估方式和主要检测方案的基础上,选择基于移频、移相及电流幅值扰动的孤岛检测方案作为本文的研究重点,在Qf0×Gnorm坐标系中对算法盲区评估,并仿真验证了算法的检测效果。此外,文章分析了单相光伏逆变器的工作原理和结构拓扑,确定采用两级式非隔离结构,逆变部分采用H桥拓扑,使用电压电流闭环SPWM控制方式,并通过建模仿真验证了控制算法的可实现性。 本文在系统整体分析和仿真分析的基础上,完成了3kW样机的研制,包括主功率电路,驱动电路,采样电路,电源电路等功能电路的设计,以及关键程序的设计。并对样机进行了实验,分析了样机在各个功率条件下的效率,输出电流的谐波失真度。按照测试标准,对样机的孤岛算法进行实验验证。
[Abstract]:With the deepening of industrialization, energy and environment is an unavoidable problem. All kinds of new energy technologies have become the focus of research all over the world. Photovoltaic power generation as an important way of solar energy utilization has become an important research direction of new energy technology. As a necessary function of photovoltaic grid-connected inverter, islanding detection has become an important research direction in grid-connected power generation field. Based on the non-isolated single-phase photovoltaic grid-connected inverter, the islanding detection technology and grid-connected control method are studied in this paper. In this paper, the significance and research status of islanding detection technology are described. Based on the comparison and analysis of the existing detection standards, evaluation methods and main detection schemes, frequency shift is selected. The isolated island detection scheme of phase shift and current amplitude disturbance is the focus of this paper. The blind area of the algorithm is evaluated in Qf0 脳 Gnorm coordinate system, and the detection effect of the algorithm is verified by simulation. In addition, the working principle and structure topology of single-phase photovoltaic inverter are analyzed. The two-stage non-isolated structure, H-bridge topology and voltage and current closed-loop SPWM control mode are used in the inverter. The realizability of the control algorithm is verified by modeling and simulation. On the basis of the whole system analysis and simulation analysis, the 3kW prototype is developed, including the design of the main power circuit, the driving circuit, the sampling circuit, the power supply circuit, and the design of the key program. The efficiency of the prototype and the harmonic distortion of the output current are analyzed. According to the test standard, the islanding algorithm of the prototype is verified experimentally.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM464;TM615
本文编号：2153725
[Abstract]:With the deepening of industrialization, energy and environment is an unavoidable problem. All kinds of new energy technologies have become the focus of research all over the world. Photovoltaic power generation as an important way of solar energy utilization has become an important research direction of new energy technology. As a necessary function of photovoltaic grid-connected inverter, islanding detection has become an important research direction in grid-connected power generation field. Based on the non-isolated single-phase photovoltaic grid-connected inverter, the islanding detection technology and grid-connected control method are studied in this paper. In this paper, the significance and research status of islanding detection technology are described. Based on the comparison and analysis of the existing detection standards, evaluation methods and main detection schemes, frequency shift is selected. The isolated island detection scheme of phase shift and current amplitude disturbance is the focus of this paper. The blind area of the algorithm is evaluated in Qf0 脳 Gnorm coordinate system, and the detection effect of the algorithm is verified by simulation. In addition, the working principle and structure topology of single-phase photovoltaic inverter are analyzed. The two-stage non-isolated structure, H-bridge topology and voltage and current closed-loop SPWM control mode are used in the inverter. The realizability of the control algorithm is verified by modeling and simulation. On the basis of the whole system analysis and simulation analysis, the 3kW prototype is developed, including the design of the main power circuit, the driving circuit, the sampling circuit, the power supply circuit, and the design of the key program. The efficiency of the prototype and the harmonic distortion of the output current are analyzed. According to the test standard, the islanding algorithm of the prototype is verified experimentally.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM464;TM615
【参考文献】
相关期刊论文 前10条
1 昌金铭;;国内外光伏发电的新进展[J];中国建设动态(阳光能源);2007年01期
2 孙朝晖;吴浩伟;方斌;耿攀;;采用PID和重复控制的逆变器波形控制策略[J];船电技术;2010年02期
3 张纯江;郭忠南;孟慧英;刘炜;;主动电流扰动法在并网发电系统孤岛检测中的应用[J];电工技术学报;2007年07期
4 贾秀芳,赵成勇,李黎,陈恺;直流系统绝缘监测综合判据[J];电力系统自动化;1999年16期
5 侯梅毅;高厚磊;刘炳旭;许明;;基于相位偏移的孤岛检测新方法[J];电力自动化设备;2009年11期
6 李立伟;陈伟斌;马平;;新型直流系统绝缘监测装置及其实现[J];高电压技术;2008年11期
7 谢海宁;楼越焕;;探讨直流系统接地故障检测方法[J];广西电力;2011年05期
8 郭卫农,段善旭,康勇,陈坚;电压型逆变器的无差拍控制技术研究[J];华中理工大学学报;2000年06期
9 陈东华,谢少军,周波;瞬时值电流控制逆变技术比较[J];南京航空航天大学学报;2004年03期
10 鹿婷;段善旭;康勇;;逆变器并网的孤岛检测方法[J];通信电源技术;2006年03期
相关博士学位论文 前1条
1 刘芙蓉;并网型户用光伏系统的孤岛检测技术研究[D];华中科技大学;2008年
，本文编号：2153725
本文链接：https://www.wllwen.com/kejilunwen/dianlilw/2153725.html
