三相四線制有源電力濾波器控制策略的研究
[Abstract]:In recent years, the heavy use of harmonic source load makes the power quality of the system difficult to meet the requirements in many cases, and the power network has been forced to access more and more kinds of compensators. Active Power filter (active power filter,APF) is considered to be an effective method to solve harmonic problems. It overcomes the inherent defects of traditional PPF. In the power network, a considerable part of the harmonic source load is connected to the power network through three-phase four-wire connection. With the application of smart microgrid, the problem of medium and low voltage harmonic pollution is becoming more and more serious, and the use of common three-wire APF is becoming more and more limited. The main contents of this paper are as follows: 1. The mathematical model of three-phase output current switching state in abc coordinates is established, and the related mathematical expressions are effectively processed by introducing dq0 coordinate transformation. The midpoint potential shift of the DC side of three-phase four-wire APF capacitor is always a problem. The definition of the influence factor of midline current and midpoint offset is defined. The difference between the upper-voltage and the down-voltage is used as the basis for calculating the midline current injected into the harmonic instruction current. The appropriate sampling period is defined and the influence factor is calculated according to the contravariant carrier comparison signal. Finally, the first order LADRC compensation current control core algorithm is set up based on the mathematical model in dq0 coordinates. Using the advantage of LESO in linear ADRC to estimate disturbance synthetically, the coupling of dq axis mathematical model is decoupled, and the method of parameter tuning is given. The simulation waveform shows that LADRC is superior to PID in controlling the output compensation current. It is proved that LADRC can replace the application of traditional PI. 4. The filtering effect of APF system is analyzed. The results show that the three-phase four-wire APF has good harmonic control effect and the midline current is controllable under the unbalanced load. The object of this paper can deal with complex harmonic problems.
【學(xué)位授予單位】:天津理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TM761;TN713.8
【參考文獻】
相關(guān)期刊論文 前10條
1 鐘山;楊晟;趙爭鳴;;有源電力濾波器技術(shù)與發(fā)展綜述[J];變頻器世界;2011年01期
2 何英杰;劉進軍;王兆安;唐健;鄒云屏;;基于重復(fù)預(yù)測原理的三電平APF無差拍控制方法[J];電工技術(shù)學(xué)報;2010年02期
3 王新宇;何英杰;劉進軍;;注入零序分量SPWM調(diào)制三電平逆變器直流側(cè)中點電壓平衡控制機理[J];電工技術(shù)學(xué)報;2011年05期
4 王群,姚為正,劉進軍,王兆安;電壓型諧波源與串聯(lián)型有源電力濾波器[J];電力系統(tǒng)自動化;2000年07期
5 黃浦;葛文奇;李友一;李軍;修吉宏;;航空相機前向像移補償?shù)木性自抗擾控制[J];光學(xué)精密工程;2011年04期
6 謝路耀;金新民;吳學(xué)智;尹靖元;童亦斌;;基于零序注入的NPC三電平變流器中點電位反饋控制[J];電工技術(shù)學(xué)報;2012年12期
7 李寧;王躍;雷萬鈞;王兆安;;三電平NPC變流器SVPWM策略與SPWM策略的等效關(guān)系研究[J];電網(wǎng)技術(shù);2014年05期
8 汪曉風(fēng);王京;李潤;;立輥電液伺服系統(tǒng)的線性自抗擾控制[J];機床與液壓;2010年20期
9 韓京清;系統(tǒng)辨識的一種方法——狀態(tài)反饋法[J];控制與決策;1990年01期
10 韓京清;非線性系統(tǒng)的狀態(tài)觀測器[J];控制與決策;1990年03期
相關(guān)博士學(xué)位論文 前1條
1 劉麗英;線性自抗擾控制策略在異步電機調(diào)速系統(tǒng)中的應(yīng)用研究[D];天津大學(xué);2010年
相關(guān)碩士學(xué)位論文 前3條
1 張佳;三相并聯(lián)型有源電力濾波器的研究[D];湖北工業(yè)大學(xué);2012年
2 葉明佳;基于瞬時無功功率理論的諧波和無功電流檢測方法研究[D];重慶大學(xué);2012年
3 李曉萌;電流型并聯(lián)有源濾波器及其控制方法研究[D];哈爾濱工業(yè)大學(xué);2012年
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