配电网智能电力变压器的设计与仿真  

Design and Simulation of Intelligent Power Transformer in Distribution Network

作　　者：赵刚 Zhao Gang

机构地区：[1]绍兴技师学院(筹)绍兴市职教中心,浙江绍兴312000

出　　处：《电力系统装备》2018年第1期69-71,共3页Electric Power System Equipment

摘　　要：为了使智能电力变压器适应配电网高压大功率场所,本文采用了输入级H桥级联输出级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,详细探讨了输入级的控制策略。输入高压级级联H桥在电压定向控制的基础上采用载波移相SPWM技术,不仅可以在不提高各H桥的开关频率的前提下大大改善输出电压的谐波性能,还能实现各H桥均压,使通过增加级联H桥数来提高电压等级成为可能。最后MATLAB/Simulink仿真表明,该系统能够实现网侧单位功率因数运行,输出恒定三相正弦交流电压,并具有良好的抗干扰性能。In order to make the intelligent power transformer adapt to the high-voltage and high-power distribution network, this paper adopts the input stage H bridge cascade output stage H bridge parallel circuit structure, which can improve the voltage level and current level of the system. In this paper, the principle and topology of the system are analyzed, and the control strategy of input level is discussed in detail. Input high voltage cascaded H bridge using carrier phase shifted SPWM technique based on voltage oriented control, not only can greatly improve the performance of harmonic in output voltage without increasing the switching frequency of the H of the bridge, but also to achieve the H bridge voltage, so by increasing the cascaded H bridge to improve the voltage level possible. Finally, the MATLAB/Simulink simulation shows that the system can run the unit power factor on the grid side and output the constant three phase sine alternating voltage, and has good anti-jamming performance.

关 键 词：智能电力变压器 级联H桥 载波移相技术 

分 类 号：TM421[电气工程—电器]