无谐波检测控制的三电平APF死区效应补偿策略  

Compensation Strategy of Dead-time Effect for Three-level APF under Non-harmonic Detection Control

作　　者：刘映竹 孟润泉[1] 王磊[1] 王祺 孙宝鑫 LIU Yingzhu;MENG Runquan;WANG Lei;WANG Qi;SUN Baoxin(Shanxi Key Lab of Power System Operation and Control,College of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Zhangjiakou Power Supply Company,State GridJibeiPower Grid Company,Zhangjiakou 075000,China)

机构地区：[1]电力系统运行与控制山西省重点实验室(太原理工大学电气与动力工程学院),太原030024 [2]国网冀北电力有限公司张家口供电公司,张家口075000

出　　处：《电力系统及其自动化学报》2019年第4期56-61,共6页Proceedings of the CSU-EPSA

摘　　要：为了在无谐波检测控制的三电平有源电力滤波器中根据补偿电流反馈削弱死区效应,本文提出一种适用于无谐波检测控制的三电平有源电力滤波器的补偿电流计算方法。该方法通过分析不同开关状态下有源电力滤波器滤波电感所承受的电压来计算补偿电流,并利用级联延迟信号对消滤波器提高运算的准确性,然后基于计算得出的补偿电流对空间矢量脉宽调制信号进行修正。通过Matlab/Simulink仿真研究表明,该方法不但避免了大量的死区,并且消除了不必要的开关切换,改善了有源电力滤波器的滤波效果。To attenuate the dead-time effect of a three-level active power filter(APF)under non-harmonic detection control based on the feedback of compensation current,a compensation current calculation method for a three-level APF is proposed,which is applicable for the non-harmonic detection control. Through analyzing the voltage on the APF filter inductance in different switching states,the compensation current is calculated.Moreover,the operation accuracy is improved by using a cascaded delayed signal cancellation(CDSC)filter,then the space vector pulse width modulation(SVPWM)signal is corrected based on the calculated compensation current.Simulations are conducted using Matlab/Simulink,and results show that this method not only avoids a large number of dead zones,but also eliminates unnecessary switches and improves the filtering effect of APF.

关 键 词：无谐波检测 三电平 有源电力滤波器 死区效应 

分 类 号：TM402[电气工程—电器]