返回
类型 应用研究 预答辩日期 2018-05-18
开始(开题)日期 2014-01-15 论文结束日期 2018-01-19
地点 动力楼318 论文选题来源 其他项目    论文字数 7.6 (万字)
题目 高压大功率中频除尘电源研究
主题词 高压大功率中频变压器,瞬态特性,电除尘中频电源,交流绕组,高频损耗
摘要 节能、增效、减排已成为时代发展的主题。在控制烟气颗粒污染物排放方面,静电除尘器以其独特的优势得到广泛应用,尤其是在燃煤发电厂中静电除尘器占据了80%以上的市场份额,而传统的工频电源存在除尘效率低(需要多级电场依次除尘),能耗大(占厂用电的3%~6%)等缺点。在这种情况下,新型静电除尘器在节能、除尘效率与优化控制方面需要更高的要求。如何提高静电除尘器的除尘效率,降低能耗,减少工业粉尘的排放量,满足更高的环保要求,成为静电除尘技术的研究热点。静电除尘器的关键部分是其高压电源部分,因此对静电除尘器的高压供电方案提出了更高的要求。 论文围绕研制高效节能的高压大功率中频静电除尘电源展开研究。一个完整的静电除尘电源包括大功率逆变器、高压大功率中频变压器、静电除尘控制器系统。 论文首先对大功率逆变器功率变换技术进行了研究。从基本的单相全桥变流器原理出发,对静电除尘电源逆变器常用的PWM硬开关方式和谐振方式进行了分析,得出了上述工作模式的电路特性。结合静电除尘本体等效负载,利用PSIM仿真软件对PWM硬开关模式进行了仿真计算,验证了理论分析的正确性。最终确定了论文研究的大功率逆变器的工作模式,并研究了一种能量回馈式变流器的控制算法。 高压大功率中频变压器不同于工频变压器、开关电源变压器。首先建立了中频变压器的等效电路,分析了中频变压器分布参数的计算方法及其对电路的影响。讨论并比较了不同变压器磁芯损耗的计算方法。针对中频变压器运行时的高频效应,建立了基于集肤效应和邻近效应的交流绕组谐波模型,讨论了基于交流绕组谐波模型下采用铜箔、矩形导线、圆导线的绕制方法。试制小功率样机验证了交流绕组谐波模型的正确性,为高压大功率中频变压器设计提供了依据。 在高压大功率中频变压器关键技术分析与小功率样机验证的基础上,设计了高压大功率中频变压器。确定了中频变压器的工作频率、铁芯材料和结构、绕组形式等,并采用AP法进行了变压器初步设计,最后以变压器交流损耗、成本作为约束条件进行了优化设计。研制了高压大功率中频变压器,基本数据为:输入交流方波510V,输出电压为72kV,功率为80kVA,输出电流1.2A,工作频率500Hz,效率88%。针对研制样机,进行了非晶磁芯特性试验,变压器损耗和分布参数计算。论文研究了一种可用于大型变压器故障在线检测的新型传感器。 在介绍电磁场仿真变压器模型的基础上,采用有限元场路耦合方法分析了高压大功率中频变压器磁芯饱和及不饱和情况下的瞬态特性,包括启动、稳态、短路等工况下变压器电压、电流及绕组受力情况。在计及磁芯饱和特性和负载特性后,变压器电压、电流、受力特性比正弦波下的特性值都有所降低,同时仿真结果验证了启动时刻的瞬态过压、过流对变压器的热设计和结构设计都有很大影响。 根据高压大功率中频静除尘电源实际运行工况,设计了一种峰值电流控制方法。介结了中频除尘电源中闪络控制、反电晕控制的实现方法。结合全文内容,研制了高压大功率中频静电除尘电源样机,对样机进行了实验验证。研制成功的高压大功率中频中频静电除尘电源已经投入工程应用,累计运行3000多个小时,连续满载运行168小时以上,输出最高电气量为:电压72kV、电流1200mA、功率80kVA,变压器最高温度为79℃,除尘效率达99%以上,满足设计目标,成功实现产品化。目前在运行设备累计达200台以上。
英文题目 STUDY OF HIGH VOLTAGE HIGH POWER MEDIUM-FREQUENCY ESP SYSTEM
英文主题词 High voltage high power medium frequency ransformer,transient characteristic,electrostatic precipitator medium frequency power supply,AC winding, high frequency loss
英文摘要 Energy saving, efficiency increasing and emission reduction have become the theme of development of times. In the field of emission control of fume particulate pollutants, Electrostatic Precipitator(ESP)is widely used due to its unique advantages and occupies more than 80% market share in thermal power plant , while the traditional power frequency supply lacks in low dust-removal efficiency and high energy consumption etc.,because it works through several electric fields successively and consumes 3%~6% auxiliary power of thermal power plant. In this case, new-type ESP demands more in energy saving, efficiency increasing and control optimization. How to improve the efficiency of electrostatic precipitator, to reduce energy consumption and emission of dust pollution of electrostatic precipitator and to meet the requirement of higher environmental has become the research focus of electrostatic precipitation technology. The key part of the electrostatic precipitator is its high voltage power supply, so a higher requirement for the high voltage power supply scheme of the electrostatic precipitator is put forward. This paper focuses on the study of high efficient and energy-saving high voltage high power medium frequency power supply of electrostatic precipitator. A whole electrostatic precipitator system consists of the high-power inverter, the high-voltage high-power medium frequency transformer and electrostatic precipitator controller system. First of all, the paper puts a study on conversion technology of high-power circuit inversion. Based on the single-phase full-bridge PMW converter theory, the paper analyzes two working modes of hard switching and resonance of the inverter in electrostatic precipitator power supply. Then the circuit characteristics of the above working modes are obtained. Combined with the equivalent load of electrostatic precipitator, the simulation calculation of PWM hard switch mode is carried out by PSIM simulation software, and the correctness of the theoretical analysis is verified. Finally, the working mode of the high-power inverter studied in this paper is determined. Also a control algorithm of the energy feedback converter is studied in this paper. The high voltage high power medium frequency transformer is different from power frequency transformer and switch power transformer. First, the equivalent circuit of medium frequency transformer is set up, and the calculation method of the distribution parameters of medium frequency transformer and its influence on the circuit are analyzed. The calculation method of magnetic core loss of different magnetic material is discussed and compared. According to the high frequency effects of medium frequency transformer operation, AC winding harmonic model combined skin effect and proximity effect is established and analyst. Based on AC winding harmonic model, the winding method using copper foil, rectangular wire, round wire are discussed. The trial production of a small power prototype verifies the correctness of the harmonic model of the AC winding, which provides a basis for the design of high voltage high power medium frequency transformer. The high voltage high power medium frequency transformer was be designed based on the analysis of the key technology of above and verification of small power prototype. After determine the working frequency, the magnetic material and its structure and winding structure, the AP method was applied to preliminary design of the transformer and optimization design with the constraint conditions of AC loss and transformer cost. The basic data of the high voltage high power medium frequency transformer is,: input square wave AC 510V, output voltage 72kV, power 80kVA, output current 1.2A, work frequency 500Hz, the efficiency 88%. According to the prototype, the characteristic of amorphous magnetic material was tested, the transformer loss and distribution parameters were calculated .This paper also studies a new sensor for large transformer on-line fault detection. Based on the electromagnetic simulation of transformer model, the paper analysis the transient characteristics of high voltage high power medium frequency transformer under core saturated and unsaturated conditions by using the finite element method coupled field and circuit. Those transient characteristics include voltage, current and winding force of transformer under starting, steady state and short-circuit condition. In considering magnetic core saturation characteristics and load characteristics of transformer, the voltage, current and winding force characteristic values of transformer are reduced compared with sine wave condition. And the simulation results of overcurrent and overvoltage of transient state under starting time verify the great negative effects to thermal and structure design of transformer. A peak current control method is designed according to the actual operating conditions of high voltage high power medium frequency power supply of electrostatic precipitator. The paper introduced the realization method of flashover control and back corona control in medium frequency power supply. Combined the full text content, a high voltage high power medium frequency prototype power supply of electrostatic precipitator is developed, and the prototype is verified experimentally. High voltage high power medium frequency electrostatic precipitator system developed has been put into application, running a total of more than 3000 hours, 168 hours of continuous full load operation, the maximum output electric quantity: voltage 72kV, current 1200mA, 80kVA. The maximum temperature of transformer is 79℃, the dust removal efficiency is more than 99%.The object of the paper developed meets the design goals and successful realized the product. At present, there are more than 200 units in the operating.
学术讨论
主办单位时间地点报告人报告主题
东南大学伺服控制技术中心 2016.3.18 动力楼211 潘志翔 大功率高压中频变压器直流偏磁原因及消除方法
东南大学伺服控制技术中心 2016.6.9 动力楼211 李志广 地铁二重化能馈变流器控制原理分析
东南大学伺服控制技术中心 2016.11.20 动力楼211 沈湛 大功率高压中频变压器交流绕组谐波损耗分析
东南大学伺服控制技术中心 2017.6.20 动力楼233 沈湛 大功率高压中频变压器方波激励下绕组电应力分析
东南大学伺服控制技术中心 2017.8.28 动力楼233 李志广 中频除尘电源工程应用讨论
东南大学伺服控制技术中心 2017.4.6 动力楼211 潘鹏 中频除尘电源双闭环控制原理分析
东南大学伺服控制技术中心 2017.1.10 动力楼211 李志广 中频电除尘电源峰值电流控制方法
东南大学伺服控制技术中心 2017.9.29 动力楼233 李志广 一种新型气敏传感器制作方法
     
学术会议
会议名称时间地点本人报告本人报告题目
Thirty Second Annual IEEE Applied Power Electronics Conference and Exposition 2017.3.26 APEC Tampa, FL, USA An AC Resistance Optimization Method Applicable for Inductor and Transformer Windings with Full Layers and Partial Layer
第十六届中国电除尘学术交流大会 2016.10.26 武汉 基于集肤效应与邻近效应的除尘变压器绕组谐波损耗优化设计
     
代表作
论文名称
基于集肤效应与邻近效应的除尘变压器绕组谐波损耗优化设计
 
答辩委员会组成信息
姓名职称导师类别工作单位是否主席备注
王恩荣 正高 教授 博导 南京师范大学
余海涛 正高 教授 博导 东南大学
黄允凯 正高 教授 博导 东南大学
房叔华 正高 教授 博导 东南大学
李先允 正高 教授 硕导 南京工程学院
      
答辩秘书信息
姓名职称工作单位备注
杨燕 副高 讲师 东南大学