基于滑模控制的三電平PWM整流器建模及仿真
作者:王虎 [1] 熊靜[2] 葉華強(qiáng) [2] 上傳時(shí)間:2012/5/15 16:29:44
摘要:建立了中點(diǎn)箝位三電平PWM整流器的數(shù)學(xué)模型,為提高系統(tǒng)直流環(huán)節(jié)動(dòng)態(tài)響應(yīng),設(shè)計(jì)了基于PI調(diào)節(jié)的電流內(nèi)環(huán)和滑模變結(jié)構(gòu)的電壓外環(huán)的雙閉環(huán)控制器。仿真結(jié)果表明:該P(yáng)WM整流器可以有效抑制諧波,實(shí)現(xiàn)網(wǎng)側(cè)單位功率因數(shù)控制,與常規(guī)PI控制器相比,滑模控制器的應(yīng)用使得直流環(huán)節(jié)的動(dòng)態(tài)性能得到明顯改善。
敘詞:三電平 PWM整流器 滑模控制 動(dòng)態(tài)響應(yīng)
Abstract:In this paper, the mathematical model of three-level rectifier is constructed, and the sliding-mode control strategy is studied. A double closed-loop control system based on current closed-loop of PI regulator and voltage closed-loop of the sliding-mode control regulator had been designedThe results of the emulation and the experiment were present. The experiment showed that the rectifier could effectively restrain the harmonic pollution and the system presents better dynamic and static characters
Keyword:Three-level, PWM rectifier, Sliding-mode control, Dynamic response
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