电力电子考研方向

电气工程下设5个二级学科，分别为电机与电器、电力系统及其自动化、高电压与绝缘技术、电力电子与电力传动、电工理论与新技术。

如果是女生，我认为电力电子变换、电力电子测控都可以，电力太辛苦！看你那有关系，离家近，房价低就行。

我是合肥工业大学研一的新生，谈几点意见。首先，毋庸置疑，合肥工业大学的电力电子专业在全国是很出名的，拥有教育部光伏工程研究中心。很多老师都享受国务院特殊津贴。研究方向主要是包括光伏发电和风力发电等在内的新能源方向，有很好的发展前途。毕业后工作很好找，今年有几个师兄进华为了，待遇是相当的好。目前很多公司来招人都招不到，毕业生很抢手的。但是，从考试的角度来讲，电力电子与电力传动方向分数是比较高的，据我所知，2010年复试线是三百五十多。但是自动化方向的专业比如检测等分数相对较低，并且，很多老师在带电力电子与电力传动的研究生同时还带自动化方面的研究生，比如双控，所以你要考虑清楚考试什么方向。其实，同一个老师带的，很多时候研究生期间做的课题跟你当初选的方向是没多大关系的，主要取决于你的导师的研究方向。

电气工程下设5个二级学科，分别为电机与电器、电力系统及其自动化、高电压与绝缘技术、电力电子与电力传动、电工理论与新技术。5个学科的研究领域自成一体，各有所长，发展势头强劲，是近年来考研的热点学科。电机与电器电机与电器的研究领域包括：电力系统中的大型发电机、电动机，有着广泛应用的中小型电机。前者侧重于运行分析、建模仿真及监测诊断，后者侧重于理论分析、设计方法及现代节能控制技术。就电力工业本身而言，电机就是发电厂和变电站的主要设备，它在机器制造业和轻、重型制造工业中应用广泛。可以说，只要涉及电机的场所都能看到该学科的研究成果。教育专家分析：该专业毕业生可在电力系统相关单位从事大型电机运行分析、监测控制或故障诊断等相关技术工作，也可在其他行业从事电机设计及运行控制和节能技术开发工作，还可在相关科研单位、高等学校从事科研及教学工作，或从事与电机及其运行控制相关的管理工作。高电压与绝缘技术高电压与绝缘技术主要运用于：电力系统防雷保护设计、绝缘子在线监测、防污闪、水果保鲜、真空断路器设计、脉冲储能技术及军工产品等，其研究内容与多个学科交叉，如脉冲与等离子方向、超导技术方向、自动化方向等。教育专家分析：该专业毕业生可在电力系统、电工制造和技术物理等领域从事高电压、强电流技术、绝缘技术、放电应用技术、过电压防护技术、电磁兼容技术等方面的研究，或成为从事设计、制造、运行工作的高级工程技术人才。如今，高电压这一传统专业又创新意，显现出前所未有的生机，可谓“老树发新枝”。但是与电力系统及其自动化专业相比，该专业相对冷门，竞争强度不大，录取比例接近1:1。传统高电压技术是一门试验型学科，理论与实践在研究工作中占有相当比例。但是近年来高压专业有向基础理论研究和计算机模拟仿真方向发展的趋势，试验平台的建设离不开自动控制和电力系统自动化方面的专业知识。建议考生在复试准备时注重对“高电压技术”、“电力系统工程基础”、“继电保护”等课程的学习，这些知识与将来的研究和工作密切相关。电力系统及其自动化电力系统及其自动化涉及电力生产的全过程(包括发电、输电、配电、用电等)，其研究内容衍生的各项技术成果广泛应用于发电厂、变压器、输电线路和配电装置中，涉及控制、优化、经济、稳定等多项指标。除了涉及电气工程相关知识外，该专业对自动化、测量、计算机、通信等技术也有较高要求。教育分析：该专业是目前电气工程相关学科中研究生报考最热门的一个，竞争比较激烈，特别是该学科优势明显的院校，录取比例更低。建议报考该专业的考生在备考阶段，除多掌握一些电气工程的基础知识外，还要多加掌握对电路理论、控制理论、信号与系统理论等基础理论。

Abstract: With the development of power electronics technology, harmonic hazards has become increasingly serious, harmonic governance issues has been imminent. On the power source for electronic devices harmonic analysis and concluded that its harm and the corresponding harmonic management principles and comprehensive management, and management of a harmonic outlook. Key words: power electronics; harmonics; hazards; inhibition INTRODUCTION With the development of power electronics technology, power electronic devices to the extensive application of power system harmonics caused serious pollution. Various power electronic equipment in the transport, metallurgical, chemical and other instrial traffic the extensive application of harmonics in the grid problem is becoming increasingly serious, many low power factor of power electronic devices to the power grid additional burden on the quality of power and influence, Therefore, the power electronic devices harmonic pollution has become hinder the development of power electronics technology major obstacles. Therefore, inhibition harmonic pollution and improve the power factor of power electronics technology has become a major issue in the. This paper focus on the key issues of power through electronic harmonic sources and the danger of understanding and analysis, and control of pollution from the relationship between the consideration of a comprehensive management approach on the final harmonic trends in the development of comprehensive management of the prospect. A power electronic device - the main source of harmonics Nonlinear load is a harmonic sources, which caused grid voltage distortion, in the voltage several times with the whole of the fundamental frequency component. Harmonic as the main source of power for various electronic devices mainly AC-DC converter (rectifiers, inverters, chopper, Drives), as well as bidirectional thyristor controlled switching equipment, as well as internal power system Variable Flow equipment, such as HVDC rectifier valve and the valve, and other inverter. Below its harmonics generated an analysis of the situation. 1.1 Rectifier As a DC power supply devices, rectifiers widely used in various occasions. Figure 1 (a) and Figure 1 (b) respectively for the single-phase and three-phase circuits typical. In rectifier devices, AC power supply for the current rectangular wave, rectangular wave of the fundamental frequency for the current and Jibeiai several times for the high-frequency harmonic current waveform synthesis. Obtained by Fourier series of rectangular wave of high harmonics In fundamental component I1 and the largest ratio of 1 / n, with the trigger control angle α, and the decrease of overlap angle μ for the increase of harmonic wave components have reced trend. In addition, the existing research results indicate that: Rectifier harmonic current operation mode of the size, has a direct impact, therefore consider adjusting the voltage and current rectifier, it is best to conct overlap angle, as well as for harmonic phase pressure drop calculations, in order to determine safe and economical operation mode when the control close to 40 ° angle α, overlapping in the 8 ° angle μ about the circumstances are often the most serious state of harmonic, so to go through, as far as possible through the correct choice of regulating transformers tap in order to avoid Harmonic most serious point [1]. 1.2 exchange regulator Exchange regulator used for lighting dimming and inction motor speed, and so on. Figure 2 (a) and 2 (b) respectively for the single-phase and three-phase circuits typical. Exchange regulator and the harmonic frequency rectifier basically the same. Frequency Converter 1.3 Frequency converter is AC / AC Converter behalf of equipment, when used as motor speed control devices, which contain a change with the output frequency band edge, as for the frequency change, the more complicated harmonic content. Universal Converter 1.4 GM converter input circuits are all from the diode bridge rectifier and DC capacitor components in Figure 3 (a) shows, this circuit impedance input current waveform with the different big difference. In the source impedance relatively small cases, the waveform for the lanky Zhaier high-waveform in Figure 3 (b) solid line shows the contrary, when the source impedance relatively large, its waveform for the dwarf and wide flat waveform Figure 3 (b) shown in dotted line. In addition to these typical converter will be a great number of harmonics, household appliances is not to be ignored harmonic sources. Such as television sets, battery chargers. Although their indivial capacity little, but because a lot of volume, they injected into the power supply system to the harmonic components can not be ignored. 2 harmonic hazards Harmonic hazards of the public network include: 1) make a public network components have additional harmonic loss and rece the power generation, power transmission equipment efficiency, a large number of 3rd harmonic flow neutral line, the line will cause overheating or even a fire; 2) impact of the normal work of electrical equipment, in addition to additional wear and tear caused, and also enable a motor mechanical vibration, noise and over-voltage, transformer partial serious overheating, capacitors, cables and other equipment overheating, insulation aging, shortened life expectancy, resulting damage; 3) common cause in the local power grid and parallel resonant series resonance, so that harmonic magnification so that the aforementioned hazards greatly increase, or even lead to serious accidents; 4) will lead to protection and automatic device misoperation, and electrical measuring instrument measurement inaccurate; 5) to neighbouring interfere with communications systems, light, noise and lower the quality of communication, information led to heavy loss of the communications systems do not work properly. 3 harmonic management principles To improve power quality, we must strengthen the management of the harmonics. In restricted to the utility grid harmonic source harmonic current injection, will be allowed to limit the harmonic voltage within the scope of the principle. First it is necessary to have systems in the harmonic sources and distribution, in the harmonic limit its scope in order to allow access, not curing the management measures must be taken to prevent the spread of harmonics. For this reason the International Electrotechnical Commission (IEC) and the United States have recommended IEEE standards such as IEEE provisions of the current standard harmonic limits shown in Table 1. China Power Grid with the actual level and the standard of other developed countries voltage distortion sine-rate provisions in table 2. Table 1 harmonic current limits (IEEE519-1992 Provisions) Isc / IL H <11 11 <H <17 17 <H <23 23 <H <35H 204.02.01.50.60.35.020-507.03.52.51.00.58.050-10010.04.54.01.50.712.0100-100012.05.55.02.01.015.0> 35THD <> 100015.07.06.02.51.420.0 Table 2 voltage distortion sine-rate limits Supply voltage / kV voltage distortion sine-rate limits / or 0.3856% 1043531101.5 4 harmonic comprehensive management At present, China's electric power system harmonics on the management is "pollution first, treatment after" the passive situation,

很多方面的，比如软控，plc，实在太多了，你是研究生不会不知道这个吧，起码和老师做课题的时候有接触吧自已当老板，搞一个大型电子工业园。

个人觉得还是选单片机比较好，这个考上研究生了还能用上，毕竟电力电子搞硬件的还是比较多的。

目前电力电子行业的方向还是很多的，比如：柔性交流输电（FACTS），无功补偿，电能质量，直流输电，光伏、风力新能源等等。其中又可以分为：电力系统的，工业的，软硬件方向。国内做电力电子的主营业务一般有：FACTS，如电力系统（可控）串补、高抗等;无功补偿（SVC,SVG，APF等）;电能质量（基础研究，系统控制，测量监控等）；直流输电（直流换流系统的相关理论研究，设备研发）；新能源：光伏逆变器等工业：变频器等其实主要的就是3个方面，一个是软件，算法、控制系统；一个是硬件：晶体管阀组的应用；还有一个就是系统和理论研究，其中派生的还比较多。

您好，就业分析：强电行业是垄断，好多就业去电网呢，待遇没得说; 电子信息是弱点，就业也蛮好的，以后软硬件都可以，好多通信设备制造商，运营商等都可以的;自动化就业通吃，但是专业课偏向控制的，这些公司的好多笔试专业课你可能没学过，比如强电的电机，电力系统，弱电的计算机网络相关，通信相关;各有利弊，但是就业都不错，好好学!考研分析：强电的考研竞争比较大，绝大多数分数都蛮高的，电气的研究方向也蛮多的，有电力电子(就制造变压器，转换器啥的)，电力系统(这个就业目前最好的，电网的维护)，电机方向，高压电，继电保护等;电子这个考研竞争小点，方向有电子与系统，通信工程，信号处理等，不同学校分数差距蛮大的;自动化，我考得方向，不同学校分数差距蛮大的，主要方向：双控，检测还有模式识别，偏理论也有实践;综述，各有利弊。看看自己的意向;PS，强电学起来可能辛苦些，但前景很好，这或许是大家都朝这个方向的原因。好运!!欢迎向158教育在线知道提问就业分析：强电行业是垄断，好多就业去电网呢，待遇没得说； 电子信息是弱点，就业也蛮好的，以后软硬件都可以，好多通信设备制造商，运营商等都可以的；自动化就业通吃，但是专业课偏向控制的，这些公司的好多笔试专业课你可能没学过，比如强电的电机，电力系统，弱电的计算机网络相关，通信相关；各有利弊，但是就业都不错，好好学！考研分析：强电的考研竞争比较大，绝大多数分数都蛮高的，电气的研究方向也蛮多的，有电力电子（就制造变压器，转换器啥的），电力系统（这个就业目前最好的，电网的维护），电机方向，高压电，继电保护等；电子这个考研竞争小点，方向有电子与系统，通信工程，信号处理等，不同学校分数差距蛮大的；自动化，我考得方向，不同学校分数差距蛮大的，主要方向：双控，检测还有模式识别，偏理论也有实践；综述，各有利弊。看看自己的意向；PS，强电学起来可能辛苦些，但前景很好，这或许是大家都朝这个方向的原因。好运！