【作者】 王芳；

【导师】 赵志斌； 刘磊；

【作者基本信息】 华北电力大学 ， 电气工程（专业学位）， 2014， 硕士

【摘要】 随着电力电子器件制造技术的进步以及变流技术的完善,基于IGBT器件的变流器广泛地应用到电力系统中,而其所产生的电磁骚扰问题也日益引起人们的关注。电力电子功率单元作为变流器的基本组成单元,担负着变换电流的职责,其主要由IGBT、电容及连接线等器件构成,在其工作过程中,由于IGBT的频繁开关,以及其内各器件之间的多种耦合方式等原因,使得功率单元中产生了较高的电磁骚扰。电磁骚扰的存在会影响功率单元自身的正常工作、其他用电设备的正常运行,甚至危及人身安全。本文在863项目“光伏电站功率预测及与环境关系研究”的支持下,研究了电力电子功率单元在工作中的电磁骚扰问题。首先分析了电力电子功率单元产生电磁骚扰的机理,提出了电力电子功率单元电磁骚扰的时域和频域计算方法,并分析了两种方法的特点,确定了应用频域方法分析功率单元电磁骚扰的方法。然后测量了实际电力电子功率单元的对外辐射和内部辐射,分析了功率单元的对外辐射电场的分布规律以及内部电场分布的特性,确定了内部辐射骚扰强的区域。最后提出了基于部分系统电磁骚扰辐射情况预测实际系统电磁骚扰的方法,并结合实际光伏电站的电磁骚扰的测量结果预测了其电磁辐射。同时,将测量结果与国内外相关标准进行了对比,表明光伏电站电磁骚扰不超过限值标准,为光伏电站电磁骚扰标准的制定提供参考。更多还原

【Abstract】 With the improvement of power electronic device manufacturing technology advances and converter technology based on IGBT inverter device widely used in the power system, the problems they generate electromagnetic disturbance is also increasingly a cause for concern. As the basic unit converter, power electronics power unit, which is mainly composed of IGBT, capacitors and cables and other devices, charged with the duties of the current transformation. In the course of their work, due to frequent switching of the IGBT, and a variety of coupling between devices in each of its other reasons, the power unit produces a high electromagnetic disturbance. The existence of electromagnetic disturbance will have a bad effect at the normal operation of the power unit itself, the normal operation of other electrical equipment, and even endanger the personal safety.Support by the "photovoltaic plant power prediction and research relationship with the environment," the863Project, this paper studies electromagnetic harassment of the power electronic power unit. Firstly, analyze the mechanism of electromagnetic disturbance of power electronic power unit, presented in time domain and frequency domain methods of computation power electronic power unit electromagnetic disturbance, and analyzed the characteristics of the two methods to determine the power applied to analyze time-domain electromagnetic disturbance unit method. Then measure the actual external radiation and internal radiation power electronic power unit, analyzes the characteristics of the electric field distribution of external radiation and internal power unit of the electric field distribution, determine the area of strong internal radiation harassment. Finally, a prediction based on the actual system electromagnetic disturbance of the system of electromagnetic radiation harassment case method, combined with the actual electromagnetic disturbance measurements of photovoltaic power plants predicted electromagnetic radiation. Meanwhile, the measurement results were compared with the relevant standards at home and abroad, indicating that PV power plant does not exceed limits for electromagnetic interference standards provide a reference for photovoltaic power plants electromagnetic interference standards.更多还原