微电网并入对电网谐波的影响及滤除策略的研究

发布时间：2018-01-06 14:26

本文关键词：微电网并入对电网谐波的影响及滤除策略的研究　出处：《辽宁工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：世界经济的不断发展加大了人们对于电力能源的需求，而随之而来的能源的日渐枯竭和生态环境的污染严重等现象成为世界性难题。微电网的形成给世界带来了新的发展方向，新的发展理念。然而微电网中大量电力电子装置在工作的同时也产生了大量谐波，影响着大电网的电能质量和安全运行，因此深入研究微电网并网产生的谐波问题具有十分重要的意义。首先，依据谐波的基本概念，对常见谐波源进行分类研究，分别对单相全控整流器、三相整流器电弧型负载、并联电容器等谐波源产生的谐波的原因进行了深入的分析与研究，并提出了谐波对于电力系统的危害性。其次，对微电网中光伏发电和风力发电这两个主流发电系统的构成特点展开了研究，为微电网谐波的分析建立了理论基础，，并分别对光伏发电系统和风力发电系统谐波产生的原因进行深入分析和研究。以电网中谐波产生原因为依据，建立模型，深入研究和分析负载谐波源对电网谐波的影响；再以微电网谐波产生的原因为依据建立微电网接入时的模型，深入研究和分析有非线性分布式电源接入时对电网谐波的影响。并通过辽宁工业大学微电网实验室进行相关谐波实验，用实际测得的实验数据验证理论分析的结果。最后，本文依据微电网的谐波对电网谐波的影响的分析与研究，提出了改进的微电网谐波抑制方案。对改进的抑制方案进行仿真分析，通过分析仿真结果得出改进的谐波滤除方案与传统谐波滤除方法相比可以将更多的谐波滤除，滤波效果更明显。
[Abstract]:The continuous development of the world economy has increased the demand for power, and the consequent energy exhaustion and environment pollution phenomenon becomes a worldwide problem. The micro grid is formed to bring new development direction of world development, the new concept of micro grid. However, a large number of power electronic devices in the work at the same time have a large number of harmonics, affect the large power quality and safe operation, therefore it is of great significance to further study the harmonic problems of micro grid.
First of all, based on the basic concept of harmonic, the classification of common harmonics, respectively for single-phase full controlled rectifier and three-phase rectifier arc type load, harmonic parallel capacitor and harmonic generated by the in-depth analysis and research, and put forward the harmonic danger for the power system.
Secondly, the micro grid photovoltaic power generation and wind power generation characteristics of the two major power generation system has been studied and established the theoretical foundation for the analysis of micro power harmonic, and the harmonic are photovoltaic systems and wind power generation system and the in-depth analysis and research. The harmonic cause model based on in-depth research and analysis, influence of harmonic source of power harmonic; causes produced by micro grid harmonic was set up on the basis of micro grid access model, influence on the harmonic of in-depth research and analysis of nonlinear distributed power source access. And through the Liaoning University of Technology micro grid Laboratory for the harmonic analysis by experiment. The theory of experimental data, the actual measured results.
Finally, analysis and Research on the influence of micro grid harmonic of power harmonic based, proposed microgrid harmonic suppression scheme is improved. The simulation analysis of suppression scheme is improved, through the analysis of simulation results show that the improved scheme of harmonic filtering and filtering method can be compared with the traditional harmonic harmonic filtering more, filtering effect is more obvious.

【学位授予单位】：辽宁工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM711

【参考文献】