电机与控制应用
電機與控製應用
전궤여공제응용
Electric Machines & Control Application
2015年
11期
10-15
,共6页
冯九一%宋文祥%姜书豪%杨影
馮九一%宋文祥%薑書豪%楊影
풍구일%송문상%강서호%양영
三电平有源钳位逆变器%低开关频率%电流谐波%遗传算法
三電平有源鉗位逆變器%低開關頻率%電流諧波%遺傳算法
삼전평유원겸위역변기%저개관빈솔%전류해파%유전산법
three-level active neutral point clamped inverter%low switching frequency%current harmonic minimum%genetic algorithm
研究一种适用于低开关频率运行的三电平有源钳位逆变器同步优化PWM方法,对电流谐波最小化脉宽调制开关角求解进行了改进. 以电流低次谐波幅值方程为非线性约束条件,通过设置误差精度,增加了对低次谐波幅值的限制. 对求解所需初值通过采用遗传算法求取,并对求解得出的开关角进行优化. 通过MATLAB/Simulink仿真结果表明,得到的开关角同时具有限制特定谐波幅值和保持较小电流谐波畸变率的特点.
研究一種適用于低開關頻率運行的三電平有源鉗位逆變器同步優化PWM方法,對電流諧波最小化脈寬調製開關角求解進行瞭改進. 以電流低次諧波幅值方程為非線性約束條件,通過設置誤差精度,增加瞭對低次諧波幅值的限製. 對求解所需初值通過採用遺傳算法求取,併對求解得齣的開關角進行優化. 通過MATLAB/Simulink倣真結果錶明,得到的開關角同時具有限製特定諧波幅值和保持較小電流諧波畸變率的特點.
연구일충괄용우저개관빈솔운행적삼전평유원겸위역변기동보우화PWM방법,대전류해파최소화맥관조제개관각구해진행료개진. 이전류저차해파폭치방정위비선성약속조건,통과설치오차정도,증가료대저차해파폭치적한제. 대구해소수초치통과채용유전산법구취,병대구해득출적개관각진행우화. 통과MATLAB/Simulink방진결과표명,득도적개관각동시구유한제특정해파폭치화보지교소전류해파기변솔적특점.
The optimized PWM strategy and the operating principle of three-level ANPC inverter working at low switching frequency were introduced. The traditional current harmonic minimum PWM was improved so that it could strengthen the constraint of the amplitudes of low-order harmonics. In this way, the switching angles could not only eliminate the selected harmonic but also reduce the current harmonic. High precision initial values were calculated by genetic algorithm. The expected switching angles could be easily get by substituting the initial value into the total harmonic current distortion. Finally, the validity of the control strategy proposed was verified through the MATLAB/Simulink.
