电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2015年
11期
96-100
,共5页
巫付专%侯婷婷%韩梁%冯占伟
巫付專%侯婷婷%韓樑%馮佔偉
무부전%후정정%한량%풍점위
单相动态电压恢复器%AC/DC/AC斩波变换器%瞬时无功理论
單相動態電壓恢複器%AC/DC/AC斬波變換器%瞬時無功理論
단상동태전압회복기%AC/DC/AC참파변환기%순시무공이론
single-phase dynamic voltage restorer ( DVR)%AC/DC/AC chopper instantaneous%reactive power theory
针对输入侧采用不可控整流AC/DC/AC结构的单相动态电压恢复器( DVR )输入侧功率因数低,谐波含量高等问题,提出了一种基于PWM斩波变换器的动态电压恢复器来补偿负载两端电压的跌落。该新型拓扑结构采用PWM斩波控制节省了直流侧电容,简化了滤波器设计,使输入侧线路中谐波含量降低,同时达到单位功率因数;电压检测采用单相信号构造成两相信号,利用瞬时无功理论对信号进行检测与处理,实时性高;搭建MATLAB/Simulink仿真和系统实验平台,验证其合理性和可行性。
針對輸入側採用不可控整流AC/DC/AC結構的單相動態電壓恢複器( DVR )輸入側功率因數低,諧波含量高等問題,提齣瞭一種基于PWM斬波變換器的動態電壓恢複器來補償負載兩耑電壓的跌落。該新型拓撲結構採用PWM斬波控製節省瞭直流側電容,簡化瞭濾波器設計,使輸入側線路中諧波含量降低,同時達到單位功率因數;電壓檢測採用單相信號構造成兩相信號,利用瞬時無功理論對信號進行檢測與處理,實時性高;搭建MATLAB/Simulink倣真和繫統實驗平檯,驗證其閤理性和可行性。
침대수입측채용불가공정류AC/DC/AC결구적단상동태전압회복기( DVR )수입측공솔인수저,해파함량고등문제,제출료일충기우PWM참파변환기적동태전압회복기래보상부재량단전압적질락。해신형탁복결구채용PWM참파공제절성료직류측전용,간화료려파기설계,사수입측선로중해파함량강저,동시체도단위공솔인수;전압검측채용단상신호구조성량상신호,이용순시무공이론대신호진행검측여처리,실시성고;탑건MATLAB/Simulink방진화계통실험평태,험증기합이성화가행성。
In view of such problems as the low input side power factor of the single-phase dynamic voltage restorer ( DVR) with the structure of uncontrolled rectifier AC/DC/AC and high harmonic content , this paper proposed a DVR based on the PWM chopper to compensate for the voltage drop at the two load ends .The new topology , which a-dopted the PWM chopper control , saved the DC capacitor and simplified the filter design so that the harmonic content in the input-side circuit was reduced and the input side achieved the unit power factor .Single-phase signals were con-structed into two-phase signals to detect voltage and the instantaneous reactive power theory was used to detect and process the signals , which attained high real time .Finally, a MATLAB/Simulink simulation and experimental plat-form was constructed to verify the rationality and feasibility of the new structure .