本文選題：D-STATCOM + 無功補(bǔ)償��； 參考：《中國礦業(yè)大學(xué)》2017年碩士論文

【摘要】：近年來,大量的非線性負(fù)載被使用到電網(wǎng)當(dāng)中,導(dǎo)致了不可忽視的電能質(zhì)量問題。這些電能質(zhì)量問題不僅提高了電能傳輸損耗,而且降低了電網(wǎng)供電的可靠性。因此改善電能質(zhì)量問題具有重要意義。配電網(wǎng)靜止同步補(bǔ)償器(D-STATCOM)作為改善電能質(zhì)量的重要設(shè)備,可以快速的補(bǔ)償系統(tǒng)的無功,從而抑制電網(wǎng)的電壓波動(dòng)和閃變,提高系統(tǒng)的穩(wěn)定性。本文首先介紹了無功補(bǔ)償基本原理,并對(duì)D-STATCOM系統(tǒng)建立了數(shù)學(xué)模型,從模型中可以看出,D-STATCOM系統(tǒng)是一個(gè)非線性、相互耦合的系統(tǒng)。其次,分析了補(bǔ)償電流的檢測方法,在對(duì)p-q和p qi-i法研究的基礎(chǔ)上,發(fā)現(xiàn)其在電網(wǎng)電壓不平衡或者發(fā)生畸變時(shí),該方法存在不能準(zhǔn)確地檢測出諧波、正序和負(fù)序分量的缺點(diǎn)。本文采用了改進(jìn)的檢測方法,并通過仿真驗(yàn)證了其在不平衡且畸變的電網(wǎng)電壓下,仍然可以準(zhǔn)確的檢測出各個(gè)分量。在此基礎(chǔ)上,本文采用模型預(yù)測控制,并對(duì)基于有限開關(guān)序列的模型預(yù)測控制(FCS-MPC)進(jìn)行了深入的研究,發(fā)現(xiàn)其存在開關(guān)頻率不固定和用于預(yù)測的數(shù)學(xué)模型可能不精確的缺點(diǎn),采用了具有固定開關(guān)頻率的基于干擾在線觀測的D-STATCOM模型預(yù)測控制策略,并通過仿真驗(yàn)證了其在固定開關(guān)頻率和提高模型精度的有效性。在此基礎(chǔ)上本文進(jìn)一步的分析了在不平衡電網(wǎng)電壓下D-STATCOM的運(yùn)行特性,發(fā)現(xiàn)其會(huì)導(dǎo)致直流側(cè)電壓產(chǎn)生兩倍頻波動(dòng)和過流的可能,并且兩倍頻的電壓波動(dòng)經(jīng)過開關(guān)函數(shù)的調(diào)制,會(huì)導(dǎo)致交流側(cè)輸出電流產(chǎn)生三次諧波。本文采用改進(jìn)的開關(guān)函數(shù)來抑制三次諧波,并分析了具有干擾在線觀測的D-STATCOM模型預(yù)測控制策略防止過流的能力,最后通過仿真驗(yàn)證了其在抑制三次諧波和過流的有效性。最后對(duì)實(shí)驗(yàn)樣機(jī)和實(shí)驗(yàn)結(jié)果進(jìn)行了介紹,實(shí)驗(yàn)樣機(jī)包括主電路、檢測電路、控制電路等,并且對(duì)控制系統(tǒng)的軟件和硬件進(jìn)行了設(shè)計(jì),硬件設(shè)計(jì)主要包括DSP和FPGA總線電路的設(shè)計(jì)、A/D和D/A電路的設(shè)計(jì)、繼電器電路的設(shè)計(jì)、通信電路的設(shè)計(jì)等,軟件設(shè)計(jì)主要包括主程序的設(shè)計(jì)、中斷程序的設(shè)計(jì)、故障保護(hù)程序的設(shè)計(jì)、通信程序的設(shè)計(jì)等。最后對(duì)實(shí)驗(yàn)結(jié)果進(jìn)行了分析,驗(yàn)證了模型預(yù)測控制策略的有效性。
[Abstract]:In recent years, a large number of nonlinear loads have been used in the power network, leading to the problem of power quality that can not be ignored. These power quality problems not only improve the power transmission loss, but also reduce the reliability of power supply. Therefore, it is of great significance to improve the power quality. As an important equipment to improve the power quality, the static synchronous compensator D-STATCOMC in distribution network can quickly compensate the reactive power of the system, thus restrain the voltage fluctuation and flicker of the power network, and improve the stability of the system. This paper first introduces the basic principle of reactive power compensation, and establishes a mathematical model for D-STATCOM system. From the model, we can see that the D-STATCOM system is a nonlinear and coupling system. Secondly, the detection method of compensation current is analyzed. Based on the study of p-q and p qi-i methods, it is found that the method can not accurately detect harmonic, positive and negative sequence components when the voltage is unbalanced or distorted. In this paper, the improved detection method is adopted, and the simulation results show that it can detect each component accurately under unbalanced and distorted grid voltage. On this basis, the model predictive control (MPC) is adopted in this paper, and the FCS-MPC-based model predictive control based on finite switching sequence is studied in depth. It is found that the switching frequency is not fixed and the mathematical model used for prediction may not be accurate. The D-STATCOM model predictive control strategy with fixed switching frequency based on interference on-line observation is adopted, and its effectiveness in fixed switching frequency and improved model accuracy is verified by simulation. On this basis, the operating characteristics of D-STATCOM under unbalanced grid voltage are further analyzed. It is found that it will lead to the possibility of double frequency fluctuation and overcurrent of DC side voltage, and the voltage fluctuation of double frequency is modulated by switching function. It will cause the third harmonic generation of the AC side output current. In this paper, the improved switching function is used to suppress the third harmonic, and the capability of the predictive control strategy of the D-STATCOM model with interference on-line observation to prevent the overcurrent is analyzed. Finally, the effectiveness of the algorithm in suppressing the third harmonic and the over-current is verified by simulation. Finally, the experimental prototype and experimental results are introduced. The experimental prototype includes main circuit, detection circuit, control circuit and so on. The software and hardware of the control system are designed. The hardware design mainly includes the design of DSP and FPGA bus circuit, the design of A / R D and D / A circuit, the design of relay circuit, the design of communication circuit, etc. The software design mainly includes the design of main program, the design of interrupt program, etc. Fault protection program design, communication program design, etc. Finally, the experimental results are analyzed to verify the effectiveness of the model predictive control strategy.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM761.12

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 黃晶晶;孫元崗;同向前;張愛民;王在福;;基于變換器的分段式直接功率控制[J];電工技術(shù)學(xué)報(bào);2016年14期

2 王境彪;晁勤;王一波;殷志敏;石濤;;STATCOM與SVC提高大型異步機(jī)風(fēng)電場LVRT能力對(duì)比研究[J];電源技術(shù);2016年05期

3 鄢志平;何英杰;李毅;劉進(jìn)軍;;三電平四橋臂SVG三電流滯環(huán)控制方法研究[J];中國電機(jī)工程學(xué)報(bào);2016年20期

4 陳奎;周東;孫建坡;;基于序分量法的D-STATCOM直接功率控制策略研究[J];電力系統(tǒng)保護(hù)與控制;2016年09期

5 張虎;張永昌;楊達(dá)維;;基于雙矢量模型預(yù)測直接功率控制的雙饋電機(jī)并網(wǎng)及發(fā)電[J];電工技術(shù)學(xué)報(bào);2016年05期

6 趙其國;黃國勤;馬艷芹;;中國生態(tài)環(huán)境狀況與生態(tài)文明建設(shè)[J];生態(tài)學(xué)報(bào);2016年19期

7 陳旭;張勇軍;黃向敏;;主動(dòng)配電網(wǎng)背景下無功電壓控制方法綜述[J];電力系統(tǒng)自動(dòng)化;2016年01期

8 陳東明;陳明亮;謝楨;王武斌;徐力;;基于改進(jìn)濾波及正負(fù)序分離法的鎖相環(huán)[J];電網(wǎng)技術(shù);2016年03期

9 張瑞君;;TSC+TCR組合補(bǔ)償技術(shù)及仿真分析[J];電力電容器與無功補(bǔ)償;2015年06期

10 史麗萍;李佳佳;馬艷紅;蔡儒軍;劉鵬;羅朋;謝釗文;;基于電壓空間矢量的STATCOM直接電流控制新方法[J];電工電能新技術(shù);2015年12期

相關(guān)博士學(xué)位論文 前2條

1 杜少通;諧波抑制與無功補(bǔ)償關(guān)鍵技術(shù)研究[D];中國礦業(yè)大學(xué);2015年

2 唐杰;配電網(wǎng)靜止同步補(bǔ)償器（D-STATCOM）的理論與技術(shù)研究[D];湖南大學(xué);2007年

相關(guān)碩士學(xué)位論文 前7條

1 黃巧娜;電網(wǎng)故障對(duì)直接電流控制D-STATCOM的影響及對(duì)策研究[D];中國礦業(yè)大學(xué);2015年

2 段靜栝;基于模塊化多電平變換器（MMC）統(tǒng)一電能質(zhì)量控制器（UPQC）的研究[D];河北工業(yè)大學(xué);2012年

3 孫野;基于超級(jí)電容器組的配電網(wǎng)無功補(bǔ)償器研究[D];太原科技大學(xué);2012年

4 王粉麗;配電網(wǎng)靜止同步補(bǔ)償器的仿真研究[D];西安科技大學(xué);2011年

5 劉元清;配電網(wǎng)STATCOM控制策略分析與裝置研究[D];河海大學(xué);2007年

6 姚曉林;基于超短期負(fù)荷預(yù)測的補(bǔ)償電容器優(yōu)化投切[D];山東大學(xué);2006年

7 孟燕妮;配電網(wǎng)靜止同步補(bǔ)償器控制器的研究[D];西安理工大學(xué);2005年

，

本文編號(hào)：1880325