Lag compensation errors in active power filters based on DSP controllers  

作　　者：WANG, Xuedan  JIANG, Jianguo  GAO, Baichen 

机构地区：[1]school of information and electrical engineering,china university of mining & technology,xuzhou 221008,china school of electrical and information engineering,heilongjiang institute of science and tech [2]school of information and electrical engineering,china university of mining & technology,xuzhou 221008,china [3]school of electrical and information engineering,heilongjiang institute of science and technology,harbin 150027,china

出　　处：《Mining Science and Technology》2010年第2期312-316,共5页矿业科学技术（英文版）

基　　金：provided by the National Basic Research Program of China (No.2005CB221505)

摘　　要：The growing problems of harmonic pollution on coal mine power lines caused by high-power DC drive systems has increased the use of active power filters.We analyzed compensation errors caused by the time lag in the detecting circuits of an active power filter based on DSP control.We derived a mathematical model for the compensation error starting from the error estimation when a single distortion frequency is present.This model was then extended to the case where multiple frequencies are present in the distortion.A formula for a general theory of compensation error with fixed load and fixed lag time is presented.The theoretical analysis and experimental results show that the delay time of an active power filter mainly arises from the sampling time.Lower sampling frequencies introduce larger compensation errors in the active power filter reference current.The growing problems of harmonic pollution on coal mine power lines caused by high-power DC drive systems has increased the use of active power filters.We analyzed compensation errors caused by the time lag in the detecting circuits of an active power filter based on DSP control.We derived a mathematical model for the compensation error starting from the error estimation when a single distortion frequency is present.This model was then extended to the case where multiple frequencies are present in the distortion.A formula for a general theory of compensation error with fixed load and fixed lag time is presented.The theoretical analysis and experimental results show that the delay time of an active power filter mainly arises from the sampling time.Lower sampling frequencies introduce larger compensation errors in the active power filter reference current.

关 键 词：active power filter digital signal processing MODELING compensation error 

分 类 号：TD8[矿业工程—矿山开采]