本文為美國(guó)堪薩斯州立大學(xué)（作者：FALEH A ALSKRAN）的碩士論文，共118頁(yè)。

不斷增長(zhǎng)的能源需求、不斷上漲的油價(jià)和對(duì)環(huán)境的擔(dān)憂(yōu)，迫使人們關(guān)注環(huán)境友好、獨(dú)立于化石燃料的替代能源。可再生能源（RES）已成為替代傳統(tǒng)能源發(fā)電的一種極具吸引力的能源。然而，當(dāng)RES接入電網(wǎng)時(shí)，RES自適應(yīng)的主要挑戰(zhàn)之一就出現(xiàn)了。電壓源逆變器（VSI）通常將RES連接到電網(wǎng)。與任何工程系統(tǒng)類(lèi)似，VSI的詳細(xì)動(dòng)態(tài)模型也需要用于設(shè)計(jì)和分析。然而，由于VSI的非線性，開(kāi)發(fā)能夠準(zhǔn)確描述其行為的動(dòng)態(tài)模型是一項(xiàng)復(fù)雜的任務(wù)。

本文推導(dǎo)了兩電平三相空間矢量脈寬調(diào)制VSI及其伴隨LCL濾波器的詳細(xì)平均狀態(tài)空間模型。由于VSI可以在獨(dú)立模式和電網(wǎng)綁定模式下工作，因此針對(duì)每種情況導(dǎo)出了兩個(gè)模型。在導(dǎo)出的模型中，VSI調(diào)制指數(shù)和相位角最初被認(rèn)為是常數(shù)。然而，在實(shí)際中，這些參數(shù)被認(rèn)為是主要的控制參數(shù)。為了將這些參數(shù)建模為控制輸入，建立了獨(dú)立模式和并網(wǎng)模式下VSI的小信號(hào)模型。為了驗(yàn)證所建立的大信號(hào)和小信號(hào)模型的準(zhǔn)確性，進(jìn)行了Matlab/Simulink仿真。將仿真結(jié)果與模型結(jié)果進(jìn)行了比較，并通過(guò)實(shí)驗(yàn)對(duì)模型進(jìn)行了驗(yàn)證。所建立的模型可作為設(shè)計(jì)和分析工具。此外，在不需要開(kāi)關(guān)暫態(tài)過(guò)程建模的情況下，所建立的模型可以作為系統(tǒng)研究的快速有效的仿真工具。如今，連接到電網(wǎng)的VSI數(shù)量呈指數(shù)增長(zhǎng)。使用本文所開(kāi)發(fā)的模型，可以大大減少使用仿真軟件包模擬VSI所需的時(shí)間和計(jì)算量。

Increasing energy demand, rising oilprices, and environmental concerns have forced attention to alternative energysources that are environmentally friendly and independent of fossil fuels.Renewable energy sources (RES) have become an attractive alternative to thetraditional energy sources for electric power generation. However, one of themain challenges of RES adaption arises when connecting RES to the electricgrid. Voltage source inverters (VSIs), typically, connect RES to the electricgrid. Similar to any engineering system, detailed dynamic models of the VSIsare needed for design and analysis purposes. However, due to the non-linearityof VSIs, development of dynamic models that can accurately describe theirbehavior is a complex task. In this thesis, a detailed averaged-state-spacemodel of the two-level three-phase space vector pulse width modulation VSI andits companion LCL filter is derived. Because VSIs can operate under stand-aloneand grid-tied modes, two models were derived for each case. In the derivedmodels, the VSI modulation index and phase angle are initially consideredconstant. In practice, however, these parameters are considered the maincontrol parameters. To model these parameters as control inputs, small-signalmodels of the VSI under stand-alone and grid-tied modes were derived. To verifythe accuracy of the developed large-signal and small-signal models,Matlab/Simulink simulations were carried out. The simulation results werecompared against the models results. Moreover, the models were verified throughlab experiments. The developed models can be used as design and analysis tools.In addition, the developed models can be used as fast and efficient simulationtools for system studies, when the modeling of switching transients is notneeded. Nowadays, the number of VSIs connected to the electric grid is growingexponentially. The amount of time and computation needed to simulate VSIs usingsimulation software packages can be significantly decreased by the use of thedeveloped models.

引言

三相電壓源逆變器

電力電子變換器建模

三相SVPWM電壓源逆變器的狀態(tài)空間平均模型

基于仿真與實(shí)驗(yàn)的模型驗(yàn)證

結(jié)論與未來(lái)工作展望
附錄A SVPWM開(kāi)關(guān)狀態(tài)的狀態(tài)空間表示
附錄B SVPWM扇區(qū)的平均狀態(tài)空間模型

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