本文選題：級(jí)聯(lián)H橋 + 靜止同步補(bǔ)償器(STATCOM)�。� 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：近年來(lái)隨著我國(guó)科技與經(jīng)濟(jì)的發(fā)展,如電氣化鐵路、鋼鐵冶煉等非線性或者沖擊性負(fù)荷增加快速,致使配電網(wǎng)發(fā)生電壓畸變的情況增加,電能質(zhì)量下降,電能損耗增加,并會(huì)對(duì)各種敏感設(shè)備造成不利影響。光伏、風(fēng)力等新能源發(fā)電的大規(guī)模興建,容易造成接入點(diǎn)配電網(wǎng)系統(tǒng)的大幅度擾動(dòng),這都需要大量動(dòng)態(tài)無(wú)功以支撐其電壓穩(wěn)定。解決上述問(wèn)題,務(wù)必加強(qiáng)配電網(wǎng)電壓的控制能力,增加其動(dòng)態(tài)無(wú)功補(bǔ)償設(shè)備,因此動(dòng)態(tài)無(wú)功補(bǔ)償裝置就發(fā)揮了重要的作用。靜止同步補(bǔ)償器(STATCOM)以其補(bǔ)償范圍寬、快速響應(yīng)、多樣化的補(bǔ)償功能以及占地面積小的優(yōu)越性正在取代傳統(tǒng)無(wú)功補(bǔ)償裝置(SVC)等,應(yīng)用前景廣闊,是當(dāng)前無(wú)功補(bǔ)償領(lǐng)域的研究熱點(diǎn)。本文就當(dāng)前STATCOM研究近況,對(duì)整個(gè)系統(tǒng)做了全面的設(shè)計(jì),并對(duì)其控制策略和直流側(cè)電容電壓均壓控制技術(shù)進(jìn)行了研究。該篇文章研究設(shè)計(jì)的內(nèi)容與取得的進(jìn)展性成果為:1.對(duì)靜止同步補(bǔ)償器的拓?fù)浣Y(jié)構(gòu)與調(diào)制技術(shù)作了研究。對(duì)比分析了常用多電平變換器的拓?fù)浣Y(jié)構(gòu)和調(diào)制技術(shù),通過(guò)對(duì)系統(tǒng)應(yīng)用場(chǎng)合以及功能的要求,選擇了星型連接的H橋級(jí)聯(lián)多電平結(jié)構(gòu)和載波相移脈寬調(diào)制技術(shù)(CPS-SPWM)。2.對(duì)靜止同步補(bǔ)償器控制策略和直流側(cè)電容電壓均壓控制技術(shù)進(jìn)行了研究。首先對(duì)系統(tǒng)總體控制策略提出改進(jìn),在采用前饋解耦控制基礎(chǔ)上,并對(duì)其在生成調(diào)制信號(hào)時(shí),通過(guò)Park反變換進(jìn)行優(yōu)化。然后通過(guò)分層控制思想,采用疊加純有功電壓矢量的方法來(lái)均衡各個(gè)電容上的電壓平衡。最后對(duì)控制策略和均壓控制技術(shù)通過(guò)Matlab/Simulink進(jìn)行了仿真驗(yàn)證,仿真結(jié)果表明,控制效果良好有效,與不加均衡控制對(duì)比分析,平衡控制達(dá)到了明顯的控制效果。3.對(duì)系統(tǒng)的硬件電路和軟件電路進(jìn)行了設(shè)計(jì)。硬件部分主要有:信號(hào)采樣調(diào)理電路、DSP與FPGA控制電路。對(duì)STATCOM系統(tǒng)的軟件做了編寫(xiě)并介紹了軟件工作流程的實(shí)現(xiàn)。4.最后對(duì)STATCOM系統(tǒng)主電路器件型號(hào)與參數(shù)作了研究,并搭建了小電壓實(shí)驗(yàn)?zāi)Ｐ?實(shí)驗(yàn)驗(yàn)證了硬件與軟件設(shè)計(jì)的可行性和正確性。
[Abstract]:In recent years, with the development of science and technology and economy in China, such as electrified railway, iron and steel smelting and other nonlinear or impact load increases rapidly, resulting in an increase in distribution network voltage distortion, power quality decline, power loss increased. And will have a negative impact on a variety of sensitive equipment. The large-scale construction of new energy generation such as photovoltaic, wind power and so on, can easily lead to large disturbance of access point distribution network system, which requires a large number of dynamic reactive power to support its voltage stability. To solve the above problems, it is necessary to strengthen the control ability of distribution network voltage and increase its dynamic reactive power compensation equipment, so the dynamic reactive power compensation device plays an important role. Static synchronous compensator (STATCOM), with its wide compensation range, rapid response, diversified compensation functions and small area, is replacing the traditional reactive power compensator (SVCC), and has a broad application prospect, which is the research hotspot in the field of reactive power compensation at present. In this paper, the overall design of the whole system is given, and the control strategy and the voltage equalizing control technology of the DC side capacitor voltage are also studied. The content of the research and design in this article and the progressive results obtained are: 1. 1. The topology and modulation technology of static synchronous compensator are studied. The topology and modulation techniques of common multilevel converters are compared and analyzed. The star connected H bridge cascade multilevel structure and carrier phase shift pulse width modulation (CPS-SPWM. 2) are selected according to the requirements of system applications and functions. The control strategy of static synchronous compensator and the voltage-sharing control technology of DC-side capacitor are studied. Firstly, the overall control strategy of the system is improved. Based on the feedforward decoupling control, the modulation signal is optimized by Park inverse transformation. Then the method of superposition of pure active voltage vector is used to equalize the voltage balance of each capacitor by the idea of hierarchical control. Finally, the control strategy and voltage sharing control technology are simulated by Matlab/Simulink. The simulation results show that the control effect is good and effective. Compared with the control without equalization, the balance control achieves a significant control effect of .3. The hardware circuit and software circuit of the system are designed. The hardware includes: signal sampling and conditioning circuit and FPGA control circuit. The software of STATCOM system is written and the realization of software workflow is introduced. 4. Finally, the model and parameters of the main circuit of STATCOM system are studied, and a small voltage experimental model is built, which verifies the feasibility and correctness of the hardware and software design.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM761

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本文編號(hào)：1957627