【摘要】：隨著我國煤礦生產(chǎn)技術(shù)的不斷發(fā)展和對節(jié)能減排要求的提高,在煤礦供電系統(tǒng)中,各類非線性負(fù)載的使用迅速增加。這類負(fù)載的運(yùn)行會產(chǎn)生大量諧波,不僅影響其他用電設(shè)備的正常供電,還會對各種通訊系統(tǒng)、保護(hù)系統(tǒng)、監(jiān)測系統(tǒng)等造成嚴(yán)重的電磁干擾,給煤礦安全生產(chǎn)帶來了很大的隱患。所以采取有效措施抑制煤礦電網(wǎng)系統(tǒng)的諧波污染,已經(jīng)成為煤礦企業(yè)發(fā)展的迫切要求。有源電力濾波器(APF)的補(bǔ)償效果好、響應(yīng)速度快、適應(yīng)性廣,是抑制諧波的有效裝置。本文以T型三電平APF為研究對象,著重對三電平滯環(huán)控制進(jìn)行優(yōu)化。在傳統(tǒng)的三電平滯環(huán)控制過程中,由于各相分別獨(dú)立控制而導(dǎo)致功率開關(guān)器件存在多余的開關(guān)動作。為此,本文在傳統(tǒng)的滯環(huán)控制中加入空間電壓矢量控制,提出了三電平空間矢量滯環(huán)控制策略。相比于傳統(tǒng)的滯環(huán)控制,基于空間矢量滯環(huán)控制可以在更小的開關(guān)損耗下達(dá)到更好的濾波效果,其工作效率更高。在直流側(cè)中點(diǎn)電位平衡控制研究方面,通過實(shí)時檢測中點(diǎn)電位的偏向?U_c以及中點(diǎn)電流的i_(NP)流動方向,然后對其進(jìn)行分析判斷以實(shí)時調(diào)整不同的開關(guān)組合,最終實(shí)現(xiàn)其平衡控制。最后基于Matlab仿真平臺以及dSPACE實(shí)驗(yàn)平臺進(jìn)行實(shí)驗(yàn)驗(yàn)證。具體內(nèi)容及成果如下:1)論文闡述了煤礦電網(wǎng)中諧波電流產(chǎn)生的原因及其危害,并回顧了濾波器的發(fā)展歷程,對不同的濾波器進(jìn)行了分析說明和對比,提出了論文的研究內(nèi)容。2)闡述說明了T字型三電平APF工作原理、諧波電流的提取方法以及電流的跟蹤技術(shù),提出了T字型三電平APF的技術(shù)思路和實(shí)現(xiàn)途徑。3)在分析傳統(tǒng)三電平滯環(huán)控制方法及其存在的問題基礎(chǔ)上,提出了在傳統(tǒng)三電平滯環(huán)控制中加入空間電壓矢量控制的控制思路,在此基礎(chǔ)上,構(gòu)建了空間矢量滯環(huán)控制的仿真模型,模型仿真結(jié)果表明了論文提出的控制算法的合理性和有效性。4)對三電平APF直流側(cè)中點(diǎn)電位失衡的原因進(jìn)行了分析,提出通過實(shí)時檢測中點(diǎn)電位偏向和中點(diǎn)電流方向進(jìn)而實(shí)時調(diào)節(jié)不同的開關(guān)組合的方法,在此基礎(chǔ)上,構(gòu)建了中點(diǎn)電位控制仿真模型,仿真結(jié)果表明可以較好的實(shí)現(xiàn)中點(diǎn)電位平衡控制。5)論文搭建了基于dSPACE的物理實(shí)驗(yàn)平臺并進(jìn)行了相應(yīng)實(shí)驗(yàn),實(shí)驗(yàn)結(jié)果驗(yàn)證了本文提出的基于空間矢量的滯環(huán)控制策略及中點(diǎn)電位控制方法的正確和有效。
[Abstract]:With the continuous development of coal mine production technology and the improvement of energy saving and emission reduction requirements in coal mine power supply system, the use of all kinds of nonlinear loads is increasing rapidly. The operation of this kind of load will produce a large number of harmonics, which will not only affect the normal power supply of other electric equipments, but also cause serious electromagnetic interference to various communication systems, protection systems and monitoring systems, and bring great hidden trouble to the safety production of coal mines. Therefore, it has become an urgent requirement for the development of coal mining enterprises to take effective measures to restrain harmonic pollution of coal power grid system. Active power filter (APF) is an effective device for harmonic suppression because of its good compensation effect, fast response speed and wide adaptability. This paper focuses on the optimization of three-level hysteresis loop control based on T-type three-level APF. In the traditional three-level hysteresis control process, the power switch device has redundant switching operation due to the independent control of each phase. Therefore, space voltage vector control is added to the traditional hysteresis control, and a three-level space vector hysteresis control strategy is proposed. Compared with the traditional hysteresis control, the hysteresis control based on space vector can achieve better filtering effect at lower switching loss, and its working efficiency is higher. In the research of balance control of midpoint potential on DC side, by detecting the bias of midpoint potential in real time? C and the flow direction of I _ (NP) of midpoint current, and then analyzing and judging it to adjust different switch combinations in real time, Finally, the balance control is realized. Finally, based on Matlab simulation platform and dSPACE experimental platform for experimental verification. The specific contents and achievements are as follows: 1) the paper expounds the cause and harm of harmonic current in coal mine power network, reviews the development course of filter, and analyzes and compares different filters. The research content of this paper is put forward. 2) the principle of T-shaped three-level APF, the method of harmonic current extraction and the current tracking technology are described. This paper puts forward the technical thinking and implementation of T-shaped three-level APF. 3) based on the analysis of the traditional three-level hysteresis control method and its existing problems, In this paper, the control thought of adding space voltage vector control to the traditional three-level hysteresis control is put forward. On this basis, the simulation model of space vector hysteresis control is constructed. The simulation results show that the proposed control algorithm is reasonable and effective. 4) the causes of the imbalance of neutral point potential on the DC side of three-level APF are analyzed. A method of real-time detecting midpoint potential deviation and midpoint current direction and adjusting different switch combinations in real time is proposed. On the basis of this, a simulation model of midpoint potential control is constructed. The simulation results show that the potential balance control at the middle point can be realized well. 5) the physical experiment platform based on dSPACE is built and the corresponding experiments are carried out. The experimental results show that the proposed hysteresis control strategy based on space vector and the midpoint potential control method are correct and effective.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD61

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 劉毅;徐世周;;基于改進(jìn)的滯環(huán)控制策略的并聯(lián)型有源電力濾波器仿真研究[J];工礦自動化;2010年06期

2 王臨潼;;滯環(huán)SVPWM電流控制的矢量跟蹤合成研究[J];化工自動化及儀表;2013年07期

相關(guān)會議論文 前2條

1 陳沒;李國富;李志遠(yuǎn);李永亮;高飛;;開關(guān)性沖擊負(fù)載下滯環(huán)控制電流源的研制[A];2013年中國電機(jī)工程學(xué)會年會論文集[C];2013年

2 潘峰;智澤英;;Simulink下一類通用滯環(huán)模塊的構(gòu)造[A];二○○一年中國系統(tǒng)仿真學(xué)會學(xué)術(shù)年會論文集[C];2001年

相關(guān)碩士學(xué)位論文 前10條

1 秦碩;光伏發(fā)電并網(wǎng)控制與孤島檢測方法的匹配研究[D];太原科技大學(xué);2015年

2 劉碧;單相PWM整流器的恒頻滯環(huán)控制算法研究[D];西南交通大學(xué);2016年

3 楊異迪;Buck變換器電容電流滯環(huán)控制方法研究[D];重慶大學(xué);2016年

4 閆琦;不定頻滯環(huán)SVPWM控制的有源電力濾波器的研究[D];哈爾濱理工大學(xué);2016年

5 許澤華;一種帶自動選頻PLL控制的電流滯環(huán)Buck電路的設(shè)計(jì)[D];華中科技大學(xué);2016年

6 王楓明;基于定頻滯環(huán)空間矢量有源濾波器的研究[D];太原理工大學(xué);2017年

7 王貝貝;分布式滯環(huán)控制系統(tǒng)同步分析與控制[D];東華大學(xué);2015年

8 劉日科;電壓調(diào)節(jié)模塊滯環(huán)控制方法研究[D];西南交通大學(xué);2006年

9 李秉輝;有源電力濾波器滯環(huán)控制優(yōu)化設(shè)計(jì)[D];太原理工大學(xué);2015年

10 張剛;基于滯環(huán)空間矢量三相PWM整流器研究[D];天津理工大學(xué);2009年

，

本文編號：2304813