基于正弦扰动注入的直流微网线路电感检测  

Inductance Detection of DC Microgrid Based on Sinusoidal Disturbance Injection

作　　者：葛海锋 屈克庆 赵晋斌 GE Hai-feng;QU Ke-qing;ZHAO Jin-bin(Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学电气工程学院

出　　处：《电力电子技术》2019年第12期48-51,共4页Power Electronics

基　　金：国家自然科学基金(51777120)~~

摘　　要：在直流微网中,直流变换器与直流母线之间的线路电感将会引起系统失稳。基于直流微网的结构特性提出一种线路电感的检测方法,通过对系统控制单元注入高频正弦扰动信号,提取直流变换器输出电压和输出电流中的扰动分量信号,可对线路电感进行检测。根据此电感,引入反馈环节,对系统进行补偿,调整直流电源变换器的输出阻抗,提升系统的稳定性。在此分析了线路电感的检测原理和系统补偿原理,并通过实验验证所提方法的正确性。In DC microgrid,the line inductance between the DC converter and the DC bus will cause instability of the system.Based on the structural characteristics of DC microgrid,a method for detecting line inductance is proposed.By injecting a high-frequency sinusoidal disturbance signal into the system control unit and extracting the disturbance component signal in the output voltage and output current of the DC converter,the line inductance can be detected.According to this inductance,a feedback link is introduced to compensate the system,adjusting the output impedance of the DC power converter,and improving the stability of the system.The detection principle of line inductance and the system compensation are analyzed.The correctness of the proposed method is verified by experiment.

关 键 词：变换器 直流微网 线路电感 稳定性 

分 类 号：TM46[电气工程—电器]