电力电子功率单元电磁骚扰的计算分析
发布时间：2019-05-20 04:41
【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。
[Abstract]:With the development of power electronic device manufacturing technology and the improvement of converter technology, the converter based on IGBT device is widely used in power system, and the electromagnetic disturbance caused by it has attracted more and more attention. As the basic component unit of converter, power electronic power unit is responsible for converting current. It is mainly composed of IGBT, capacitors and connecting lines. In the process of its work, due to the frequent switching of IGBT, As well as a variety of coupling modes between the devices in it, high electromagnetic disturbance occurs in the power unit. The existence of electromagnetic disturbance will affect the normal operation of the power unit itself, the normal operation of other electrical equipment, and even endanger the safety of the person. With the support of 863 project "Power Prediction of Photovoltaic Power Station and its relationship with Environment", the electromagnetic disturbance of power electronic power unit in work is studied in this paper. Firstly, the mechanism of electromagnetic disturbance in power electronic power unit is analyzed, the time domain and frequency domain calculation methods of electromagnetic disturbance in power electronic power unit are put forward, and the characteristics of the two methods are analyzed. The method of analyzing electromagnetic disturbance of power unit by frequency domain method is determined. Then the external radiation and internal radiation of the actual power electronic power unit are measured, the distribution law of the external radiation electric field of the power unit and the characteristics of the internal electric field distribution are analyzed, and the region with strong internal radiation disturbance is determined. Finally, the method of predicting the electromagnetic disturbance of the actual system based on the electromagnetic disturbance radiation of the partial system is put forward, and the electromagnetic radiation of the photovoltaic power station is predicted according to the measurement results of the electromagnetic disturbance of the actual photovoltaic power station. At the same time, the measurement results are compared with the relevant standards at home and abroad, which shows that the electromagnetic disturbance of photovoltaic power station does not exceed the limit standard, which provides a reference for the formulation of electromagnetic disturbance standard of photovoltaic power station.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM15
本文编号：2481358
[Abstract]:With the development of power electronic device manufacturing technology and the improvement of converter technology, the converter based on IGBT device is widely used in power system, and the electromagnetic disturbance caused by it has attracted more and more attention. As the basic component unit of converter, power electronic power unit is responsible for converting current. It is mainly composed of IGBT, capacitors and connecting lines. In the process of its work, due to the frequent switching of IGBT, As well as a variety of coupling modes between the devices in it, high electromagnetic disturbance occurs in the power unit. The existence of electromagnetic disturbance will affect the normal operation of the power unit itself, the normal operation of other electrical equipment, and even endanger the safety of the person. With the support of 863 project "Power Prediction of Photovoltaic Power Station and its relationship with Environment", the electromagnetic disturbance of power electronic power unit in work is studied in this paper. Firstly, the mechanism of electromagnetic disturbance in power electronic power unit is analyzed, the time domain and frequency domain calculation methods of electromagnetic disturbance in power electronic power unit are put forward, and the characteristics of the two methods are analyzed. The method of analyzing electromagnetic disturbance of power unit by frequency domain method is determined. Then the external radiation and internal radiation of the actual power electronic power unit are measured, the distribution law of the external radiation electric field of the power unit and the characteristics of the internal electric field distribution are analyzed, and the region with strong internal radiation disturbance is determined. Finally, the method of predicting the electromagnetic disturbance of the actual system based on the electromagnetic disturbance radiation of the partial system is put forward, and the electromagnetic radiation of the photovoltaic power station is predicted according to the measurement results of the electromagnetic disturbance of the actual photovoltaic power station. At the same time, the measurement results are compared with the relevant standards at home and abroad, which shows that the electromagnetic disturbance of photovoltaic power station does not exceed the limit standard, which provides a reference for the formulation of electromagnetic disturbance standard of photovoltaic power station.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM15
【参考文献】
相关期刊论文 前2条
1 马伟明;;电力电子在舰船电力系统中的典型应用[J];电工技术学报;2011年05期
2 崔翔,李琳,卢铁兵,尹浩柳,张波,赵志斌,吴茂林;电力系统电磁环境的数值预测方洁及其应用[J];华北电力大学学报;2002年02期
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