电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2015年
11期
58-63
,共6页
电压型PWM逆变器%供电电压偏差%储能滤波电容%电容参数
電壓型PWM逆變器%供電電壓偏差%儲能濾波電容%電容參數
전압형PWM역변기%공전전압편차%저능려파전용%전용삼수
voltage type PWM inverter%power supply voltage deviation%filter capacitor energy storage%capacitance parameter
在电压型PWM AC/DC/AC变换中,直流侧储能滤波电容参数的选取是变换器稳定运行的关键因素之一。针对目前直流侧电容选取存在一定的不精确性,分析了AC/DC/AC变换电路稳态时直流电容充放电的原理,对变换器交直流侧电压的关系进行研究,建立了电容纹波电压与三相供电电压偏差之间的数学模型,提出了基于三相供电电压偏差选取直流侧电容参数的方法。分别对单相和三相不可控整流电路提供直流电源时直流侧电容C的合理选取给出了相应的分析和计算,并通过仿真和试验验证了直流储能滤波电容参数确定方法的有效性。
在電壓型PWM AC/DC/AC變換中,直流側儲能濾波電容參數的選取是變換器穩定運行的關鍵因素之一。針對目前直流側電容選取存在一定的不精確性,分析瞭AC/DC/AC變換電路穩態時直流電容充放電的原理,對變換器交直流側電壓的關繫進行研究,建立瞭電容紋波電壓與三相供電電壓偏差之間的數學模型,提齣瞭基于三相供電電壓偏差選取直流側電容參數的方法。分彆對單相和三相不可控整流電路提供直流電源時直流側電容C的閤理選取給齣瞭相應的分析和計算,併通過倣真和試驗驗證瞭直流儲能濾波電容參數確定方法的有效性。
재전압형PWM AC/DC/AC변환중,직류측저능려파전용삼수적선취시변환기은정운행적관건인소지일。침대목전직류측전용선취존재일정적불정학성,분석료AC/DC/AC변환전로은태시직류전용충방전적원리,대변환기교직류측전압적관계진행연구,건립료전용문파전압여삼상공전전압편차지간적수학모형,제출료기우삼상공전전압편차선취직류측전용삼수적방법。분별대단상화삼상불가공정류전로제공직류전원시직류측전용C적합리선취급출료상응적분석화계산,병통과방진화시험험증료직류저능려파전용삼수학정방법적유효성。
In the voltage type PWM AC/DC/AC conversion , the DC side energy-storage filtering capacitor′s parame-ter selection is one of the key factors for stable operation of the converter .In view of the certain inaccuracy in the DC capacitor′s selection , this paper analyzed the principle of the DC side capacitor′s charge and discharge when the AC/DC/AC conversion circuit in steady state , and studied the voltage relationship between the DC side and the AC side of the converter .A mathematical model between capacitor ripple voltage and three-phase power supply voltage deviation is established .Thus, the capacitance parameter selection method based on the three-phase power supply voltage devi-ation is proposed .This paper respectively gives the appropriate analysis and calculations of filter capacitance when three phase and single phase uncontrolled rectifier circuit provides dc power .And through simulation and experimental verification of the DC filter capacitor energy storage method verifies the validity of arguments .