本文關(guān)鍵詞：基于多滑模變結(jié)構(gòu)控制的三相PWM整流器非線性控制　出處：《電工技術(shù)學(xué)報》2016年04期 　論文類型：期刊論文

  更多相關(guān)文章： 三相PWM整流器 輸入、輸出反饋線性化 滑模變結(jié)構(gòu)控制 非線性控制 微分幾何

【摘要】：針對三相PWM整流器的非線性特點,并進(jìn)一步改善系統(tǒng)的起動響應(yīng)、穩(wěn)態(tài)特性及動態(tài)特性,提出一種輸入、輸出反饋線性化控制與滑模變結(jié)構(gòu)控制相結(jié)合的多滑模變結(jié)構(gòu)控制策略。電壓外環(huán)采用基于指數(shù)趨近律的滑模變結(jié)構(gòu)控制策略,確保輸出電壓穩(wěn)定并給電流內(nèi)環(huán)提供參考指令電流。在建立三相PWM整流器兩輸入、兩輸出仿射非線性模型的基礎(chǔ)上,對電流內(nèi)環(huán)進(jìn)行線性化處理,并利用滑模變結(jié)構(gòu)控制理論設(shè)計了電流內(nèi)環(huán)控制器。為了驗證系統(tǒng)的可行性,在Matlab/Simulink環(huán)境中建立仿真模型,并搭建了15k W的實驗樣機。仿真與實驗結(jié)果驗證了控制方案的正確性,利用所提控制方案設(shè)計的整流器具有系統(tǒng)動態(tài)特性好、魯棒性強和抗干擾能力強等優(yōu)點,同時也克服了輸入、輸出反饋線性化需要精確數(shù)學(xué)模型的缺點。
[Abstract]:Aiming at the nonlinear characteristics of the three-phase PWM rectifier, and further improving the starting response, steady state and dynamic characteristics of the system, a kind of input is proposed. The multiple sliding mode variable structure control strategy combined with output feedback linearization control and sliding mode variable structure control. The voltage outer loop adopts sliding mode variable structure control strategy based on exponential approach law. The output voltage is stable and the reference instruction current is provided to the current inner loop. Based on the establishment of two input and two output affine nonlinear models of the three-phase PWM rectifier, the current inner loop is linearized. The current inner loop controller is designed by using the sliding mode variable structure control theory. In order to verify the feasibility of the system, the simulation model is established in the Matlab/Simulink environment. The experimental prototype of 15kW is built. The simulation and experimental results verify the correctness of the control scheme. The rectifier designed by the proposed control scheme has good dynamic characteristics of the system. It also overcomes the disadvantages of input and output feedback linearization which requires accurate mathematical model.
【作者單位】： 華南理工大學(xué)電力學(xué)院;廣西大學(xué)物理科學(xué)與工程技術(shù)學(xué)院;
【基金】：國家自然科學(xué)基金(512277034) 廣州市珠江科技新星專項(2012J2200042)資助
【分類號】：TM461
【正文快照】： 0引言三相PWM整流器由于具有能量“綠色”且雙向流動、網(wǎng)側(cè)功率因數(shù)高、電流畸變小和輸出電壓可調(diào)等優(yōu)點,成為現(xiàn)代電力電子領(lǐng)域研究的熱點問題之一,并廣泛應(yīng)用在有源電力濾波器、風(fēng)力發(fā)電、光伏發(fā)電、不間斷電源(UPS)和新興混合動力車充電站等工業(yè)領(lǐng)域。各種控制策略,如:PI控，

本文編號：1405744