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

【摘要】：近年來隨著我國科技與經(jīng)濟的發(fā)展,如電氣化鐵路、鋼鐵冶煉等非線性或者沖擊性負荷增加快速,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,并會對各種敏感設(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,容易造成接入點配電網(wǎng)系統(tǒng)的大幅度擾動,這都需要大量動態(tài)無功以支撐其電壓穩(wěn)定。解決上述問題,務(wù)必加強配電網(wǎng)電壓的控制能力,增加其動態(tài)無功補償設(shè)備,因此動態(tài)無功補償裝置就發(fā)揮了重要的作用。靜止同步補償器(STATCOM)以其補償范圍寬、快速響應(yīng)、多樣化的補償功能以及占地面積小的優(yōu)越性正在取代傳統(tǒng)無功補償裝置(SVC)等,應(yīng)用前景廣闊,是當(dāng)前無功補償領(lǐng)域的研究熱點。本文就當(dāng)前STATCOM研究近況,對整個系統(tǒng)做了全面的設(shè)計,并對其控制策略和直流側(cè)電容電壓均壓控制技術(shù)進行了研究。該篇文章研究設(shè)計的內(nèi)容與取得的進展性成果為:1.對靜止同步補償器的拓撲結(jié)構(gòu)與調(diào)制技術(shù)作了研究。對比分析了常用多電平變換器的拓撲結(jié)構(gòu)和調(diào)制技術(shù),通過對系統(tǒng)應(yīng)用場合以及功能的要求,選擇了星型連接的H橋級聯(lián)多電平結(jié)構(gòu)和載波相移脈寬調(diào)制技術(shù)(CPS-SPWM)。2.對靜止同步補償器控制策略和直流側(cè)電容電壓均壓控制技術(shù)進行了研究。首先對系統(tǒng)總體控制策略提出改進,在采用前饋解耦控制基礎(chǔ)上,并對其在生成調(diào)制信號時,通過Park反變換進行優(yōu)化。然后通過分層控制思想,采用疊加純有功電壓矢量的方法來均衡各個電容上的電壓平衡。最后對控制策略和均壓控制技術(shù)通過Matlab/Simulink進行了仿真驗證,仿真結(jié)果表明,控制效果良好有效,與不加均衡控制對比分析,平衡控制達到了明顯的控制效果。3.對系統(tǒng)的硬件電路和軟件電路進行了設(shè)計。硬件部分主要有:信號采樣調(diào)理電路、DSP與FPGA控制電路。對STATCOM系統(tǒng)的軟件做了編寫并介紹了軟件工作流程的實現(xiàn)。4.最后對STATCOM系統(tǒng)主電路器件型號與參數(shù)作了研究,并搭建了小電壓實驗?zāi)Ｐ?實驗驗證了硬件與軟件設(shè)計的可行性和正確性。
[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)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM761

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本文編號：1957627