电力电子变压器高压级的综合控制及其DSP实现.pdfVIP

学兔兔 第53卷 第4期 电测与仪表 V01．53 No．4 2016年 2月25日 ElectricalMeasurement＆ Instrumentation Feb．25。2016 电力电子变压器高压级的综合控制及其DSP实现术 赵刚，卢子广，杨达亮 (广西大学电气工程学院，南宁530004) 摘要：为了使电力电子变压器适应配电网高压大功率场合，文章采甩了高压级H桥级联低压级H桥并联的电 路结构，该结构可以提高系统的电压等级和电流等级。文中主要对系统的工作原理、拓扑结构进行了分析，研 究了高压级的控制策略。MATLAB／Simulink仿真验证了本方案的可行性。最后用MOSFET开关管IRFP460自 制H桥搭建实验平台，采用32位定点DSP处理器TMS320F2812实现对高压级的综合控制。实验结果表明，该 系统可以实现H桥均压，单位功率因数运行和实时无功补偿等功能，具有良好的动静态响应性能。 关键词：电力电子变压器；级联H桥；载波移相SPWM技术；DSP 中图分类号：TM42 文献标识码：B 文章编号：1001：1390(2016)04-0051-06 The high voltage stage comprehensive control of a power electronic transformer and its implementation of DSP Zhao Gang，Lu Ziguang，Yang Daliang (College ofElectrical Engineering，Guangxi University，Nanning 530004，China) Abstract：In order to make power electronic transformer(PET)apply to high voltage and high power situation，a cir— cuit structure of high voltage stage consisting of cascaded H bridges and low voltage stage consisting of parallel H bridges is proposed in this paper，which could improve the voltage and current class．The operation principles and to— pology structure of the system are described and analyzed and the control strategy of high voltage stage is discussed in detail．The practicability of the method is verified by MATLAB／simulation results．Finally，the high voltage stage ex— periment platform is established by H bridges made of IRFP460．and comprehensive control of the stage is realized by fixed—point 32一bits DSP controller TMS320F2812．The experiment results show that the system，possessed of a good performance of dynamic and static response，can achieve voltage equalizing of every H bridge，operate under a u