【摘要】：近年來(lái)，隨著電力電子裝置的快速發(fā)展，電網(wǎng)中出現(xiàn)了越來(lái)越多無(wú)功和諧波，使得電網(wǎng)受到頻繁的沖擊，電能質(zhì)量嚴(yán)重降低�？焖俚剡M(jìn)行就地?zé)o功補(bǔ)償對(duì)提高系統(tǒng)功率因數(shù)，提高電網(wǎng)穩(wěn)定性具有重要的現(xiàn)實(shí)意義。靜止同步無(wú)功發(fā)生器（SVG）因其有著優(yōu)良控制算法與滿意的補(bǔ)償效果吸引了越來(lái)越多的人的關(guān)注。本文針對(duì)高壓電力網(wǎng)中存在無(wú)功問(wèn)題，研究并設(shè)計(jì)了適合于高壓領(lǐng)域的H橋級(jí)聯(lián)型靜止無(wú)功發(fā)生器SVG。 本文首先簡(jiǎn)要地介紹了電力系統(tǒng)中無(wú)功補(bǔ)償?shù)谋尘�、發(fā)展現(xiàn)狀，同時(shí)介紹了SVG主電路的結(jié)構(gòu)特點(diǎn)、工作原理，并建立了SVG的數(shù)學(xué)模型。并據(jù)此模型給出控制方法，以瞬時(shí)無(wú)功功率理論為基礎(chǔ)，，利用坐標(biāo)變換計(jì)算無(wú)功電流，并采用電壓電流雙閉環(huán)控制；接著對(duì)載波調(diào)制技術(shù)作了分析，并在此基礎(chǔ)上選擇了雙極性PS-SPWM調(diào)制方法；其次對(duì)H橋級(jí)聯(lián)型SVG裝置直流側(cè)電容電壓如何控制做了詳細(xì)地分析，本文采取了分層控制方法，該方法算法簡(jiǎn)單，實(shí)現(xiàn)方便，調(diào)節(jié)效果明顯。 利用MATLAB軟件對(duì)系統(tǒng)作了仿真驗(yàn)證，搭建了6個(gè)H橋級(jí)聯(lián)的SVG仿真模型，在電網(wǎng)平衡情況下與不平衡情況下分別作了仿真驗(yàn)證；最后以數(shù)字信號(hào)處理器DSP(TMS320F2812)+FPGA為基礎(chǔ)對(duì)H橋級(jí)聯(lián)型SVG控制系統(tǒng)進(jìn)行了硬件設(shè)計(jì)和軟件設(shè)計(jì)，同時(shí)搭建了6H橋級(jí)聯(lián)SVG的實(shí)驗(yàn)平臺(tái)，進(jìn)一步驗(yàn)證本文設(shè)計(jì)方法能夠很好補(bǔ)償系統(tǒng)中的無(wú)功電流。
[Abstract]:In recent years, with the rapid development of power electronic devices, more and more reactive power and harmonics appear in the power network, which makes the power network under frequent impact, and the power quality is seriously reduced. Rapid local reactive power compensation is of great practical significance to improve the power factor of the system and improve the stability of the power system. The static synchronous Var Generator (SVG) has attracted more and more attention because of its excellent control algorithm and satisfactory compensation effect. In this paper, aiming at the reactive power problem in high voltage power network, the H bridge cascade static Var Generator (SVG.) suitable for high voltage field is studied and designed. In this paper, the background and development of reactive power compensation in power system are briefly introduced, and the structure and working principle of SVG main circuit are introduced, and the mathematical model of SVG is established. Based on the theory of instantaneous reactive power, the reactive current is calculated by coordinate transformation, and the voltage and current are controlled by double closed loop. Secondly, the carrier modulation technology is analyzed, and the bipolar PS-SPWM modulation method is chosen on this basis. Secondly, how to control the DC side capacitance voltage of H-bridge cascade SVG device is analyzed in detail. The layered control method is adopted in this paper. The method is simple, easy to realize and has obvious regulating effect. MATLAB software is used to verify the system and six SVG simulation models of H bridge cascades are built. The simulation results are verified under the condition of power network balance and unbalance respectively. Finally, based on the digital signal processor DSP (TMS320F2812) FPGA, the hardware design and software design of H-bridge cascaded SVG control system are carried out. At the same time, the experimental platform of 6H-bridge cascade SVG is built. It is further verified that the design method can compensate the reactive current in the system well.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM761.12

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 趙萌萌;江新峰;胡琴洪;龔曉偉;牛高遠(yuǎn);;SVG在光伏電站無(wú)功補(bǔ)償中的應(yīng)用[J];電力電容器與無(wú)功補(bǔ)償;2016年03期

相關(guān)碩士學(xué)位論文 前5條

1 關(guān)磊;鏈?zhǔn)絊TATCOM控制策略研究[D];安徽大學(xué);2017年

2 吳林峰;配電網(wǎng)無(wú)功補(bǔ)償系統(tǒng)的研究[D];安徽理工大學(xué);2016年

3 陳杏燦;TSC無(wú)功補(bǔ)償異步投切中涌流控制的研究與設(shè)計(jì)[D];廣東工業(yè)大學(xué);2016年

4 李現(xiàn)周;靜止無(wú)功發(fā)生器的仿真研究[D];鄭州大學(xué);2016年

5 許敏敏;級(jí)聯(lián)H橋SVG無(wú)功補(bǔ)償控制策略研究[D];太原科技大學(xué);2016年

本文編號(hào)：2393870