多电平并联型复合电流扰动发生器  

Multi-levels Parallel Connected Complex Current Disturbance Generator

作　　者：单任仲[1] 肖湘宁[1] 刘乔[1] 尹忠东[1] 于坤山[2] 

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206 [2]中国电力科学研究院,北京市海淀区100192

出　　处：《中国电机工程学报》2010年第21期26-31,共6页Proceedings of the CSEE

基　　金："十一五"国家科技支撑计划重大项目(2007BAA12B03);北京市教育委员会共建项目~~

摘　　要：提出一种新颖三相并联型复合电流扰动发生器的主电路拓扑,由背靠背H桥模块构成。其中,一侧换流器采用H桥级联方式接入系统,用以提高电压等级,另一侧换流器采用单相多绕组变压器并联方式接入系统,用以提高电流容量。级联H桥模块和脉宽调制整流H桥模块都采用三角载波移相控制,提高逆变器等效开关频率,降低整流侧开关纹波电流。从理论上分析了低频正弦波调制扰动电流、谐波电流、无功电流和功率因数调节。最后,设计制作了一套低压400V/100kVA复合电流扰动发生装置样机。实验结果证明所提出的主电路拓扑和控制策略是有效可行的。A novel main circuit topology of three phase parallel connected multiplexed current disturbance generator was proposed,composed of back-to-back H-bridge modules. The one side converter was series connected to the system in order to improve voltage rating. The other side converter was parallel connected by single phase multi-windings transformer to improve the current capacitor. The two sides of converter were controlled by carrier phase shifting sine pulse width modulation （SPWM）,so that the equivalent frequency of inverter was enhanced and the switching ripple current was reduced. The disturbances of low frequency sinusoidal wave modulation current,harmonic current,reactive current and power factor regulation were researched by theoretical. Finally,a low voltage 400 V/100 kVA multiplexed current disturbance prototype was designed and realized. The experimental results show that the proposed main circuit topology and control strategy is feasible and efficient.

关 键 词：电能质量 功率因数 电流扰动 逆变器 载波移相控制 

分 类 号：TM76[电气工程—电力系统及自动化]