本文選題：微電網(wǎng)電能質(zhì)量 + 三相四線制APF��； 參考：《太原理工大學(xué)》2016年碩士論文

【摘要】：為了應(yīng)對(duì)大規(guī)模新能源發(fā)電對(duì)傳統(tǒng)電網(wǎng)造成的不利影響,近年來(lái),國(guó)內(nèi)外專(zhuān)家和學(xué)者提出了微電網(wǎng)的概念,用于解決分布式電源并網(wǎng)與傳統(tǒng)電網(wǎng)穩(wěn)定運(yùn)行之間的矛盾。但是微電網(wǎng)中電力電子并網(wǎng)裝置的廣泛應(yīng)用以及單相/三相變頻器等非線性負(fù)荷的推廣普及,給微電網(wǎng)系統(tǒng)注入了大量諧波、不平衡電流,嚴(yán)重危害微電網(wǎng)系統(tǒng)安全可靠運(yùn)行。為了解決這個(gè)問(wèn)題,將有源電力濾波器(active power filter,APF)用于微電網(wǎng)提高其電能質(zhì)量逐漸成為熱門(mén)的研究方向。本文結(jié)合當(dāng)前有源電力濾波器APF的理論知識(shí)和關(guān)鍵技術(shù),提出了在αβγ靜止坐標(biāo)系下采用多內(nèi)模復(fù)合控制策略設(shè)計(jì)三相四線制APF電流環(huán)控制器,通過(guò)理論分析、數(shù)學(xué)建模、軟件仿真和硬件平臺(tái)測(cè)試等,研制了用于低壓微電網(wǎng)的三相四線制APF樣機(jī)。通過(guò)本文的研究主要獲得以下成果:(1)在總結(jié)有源電力濾波器APF相關(guān)理論知識(shí)和低壓微電網(wǎng)電能質(zhì)量及其控制技術(shù)最新研究成果的基礎(chǔ)上,基于無(wú)諧波檢測(cè)控制原理,提出在αβγ靜止坐標(biāo)系下采用多內(nèi)模復(fù)合控制策略設(shè)計(jì)三相四線制APF的電流環(huán)控制器。(2)在對(duì)不同拓?fù)浣Y(jié)構(gòu)的三相四線制APF進(jìn)行對(duì)比分析的基礎(chǔ)上,選擇了四橋臂逆變器作為其主電路,并直接將網(wǎng)側(cè)電流、直流母線電壓作為三相四線制APF的狀態(tài)變量建立了其數(shù)學(xué)模型。(3)在αβγ靜止坐標(biāo)系下提出的多內(nèi)模復(fù)合控制策略利用矢量諧振控制頻率適應(yīng)性好和穩(wěn)定裕度大的優(yōu)點(diǎn)實(shí)現(xiàn)對(duì)基頻分量的快速跟蹤控制,利用重復(fù)控制計(jì)算量小的特點(diǎn)實(shí)現(xiàn)對(duì)周期性諧波信號(hào)的有效跟蹤控制,具有動(dòng)態(tài)響應(yīng)速度快、穩(wěn)態(tài)精度高、計(jì)算量小的特點(diǎn)。(4)通過(guò)建模分析、軟件編程、硬件設(shè)計(jì)和實(shí)驗(yàn)平臺(tái),實(shí)現(xiàn)了采用多內(nèi)模復(fù)合控制策略的三相四線制APF,并通過(guò)相關(guān)仿真和實(shí)驗(yàn)進(jìn)行了驗(yàn)證。(5)研究結(jié)果表明,采用本文所提出的多內(nèi)模復(fù)合控制策略的三相四線制APF能夠有效解決低壓微電網(wǎng)的電流波形畸變、功率因數(shù)低、負(fù)荷不平衡等問(wèn)題,對(duì)于其在微電網(wǎng)的進(jìn)一步工程應(yīng)用具有很強(qiáng)的指導(dǎo)意義。
[Abstract]:In order to cope with the adverse effects of large-scale new energy generation on traditional power grid, in recent years, experts and scholars at home and abroad have put forward the concept of micro-grid, which is used to solve the contradiction between distributed generation and stable operation of traditional power grid. However, the wide application of power electronic grid-connected devices in microgrid and the popularization of nonlinear loads such as single-phase / three-phase inverter have injected a large number of harmonics and unbalanced currents into microgrid systems, which seriously harm the safe and reliable operation of micro-grid systems. In order to solve this problem, active power filter (APF) used in microgrid to improve its power quality has gradually become a hot research direction. Based on the theoretical knowledge and key technology of active power filter (APF) at present, this paper presents the design of three-phase four-wire APF current loop controller using multi-internal model compound control strategy in 偽 尾 緯 stationary coordinate system. A three-phase four-wire APF prototype for low voltage microgrid was developed by software simulation and hardware platform testing. Based on the summary of APF theory knowledge of active power filter and the latest research results of low voltage microgrid power quality and its control technology, the principle of harmonic free detection and control is obtained. In the 偽 尾 緯 stationary coordinate system, the multi-internal model compound control strategy is used to design the three-phase four-wire APF current loop controller. Based on the comparative analysis of three-phase four-wire APF with different topologies, this paper presents a new method for designing three-phase four-wire APF with different topologies. The four-leg inverter is chosen as its main circuit, and the grid-side current is directly connected. DC bus voltage as the state variable of three-phase four-wire APF, the mathematical model of DC bus voltage is established. (3) in 偽 尾 緯 stationary coordinate system, the multi-internal model compound control strategy is put forward. The vector resonance is used to control frequency adaptability and stability margin. The point realizes the fast tracking control to the fundamental frequency component, The effective tracking control of periodic harmonic signal is realized by using the characteristics of low computation cost of repetitive control. It has the characteristics of high dynamic response speed, high steady-state precision and little calculation. Through modeling and analysis, software programming, hardware design and experimental platform, A three-phase four-wire APF with multi-internal model compound control strategy is realized, and the results of simulation and experiment show that, The three-phase four-wire APF based on the multi-internal model compound control strategy proposed in this paper can effectively solve the problems of current waveform distortion, low power factor and unbalanced load in low-voltage microgrid. It has strong guiding significance for its further engineering application in microgrid.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TM761

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