發(fā)布時(shí)間：2018-06-07 17:36

  本文選題：分布式發(fā)電 + 儲(chǔ)能變流器　； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：分布式發(fā)電在當(dāng)今社會(huì)中受到越來(lái)越多的重視,儲(chǔ)能系統(tǒng)對(duì)改善可再生能源發(fā)電的不確定性、功率波動(dòng)等可起到重要作用。儲(chǔ)能變流器作為可再生能源與電網(wǎng)之間的重要接口設(shè)備,其并網(wǎng)電流質(zhì)量,如諧波畸變率,是重要指標(biāo)。本文以典型的LCL三相電壓型PWM變流器為研究對(duì)象,重點(diǎn)對(duì)畸變電網(wǎng)電壓下儲(chǔ)能變流器的電流控制策略進(jìn)行研究。本文介紹了PWM變流器的拓?fù)浣Y(jié)構(gòu)和工作原理,建立了abc及αβ坐標(biāo)系下的數(shù)學(xué)模型,設(shè)計(jì)了LCL濾波器參數(shù)并對(duì)其有源阻尼、無(wú)源阻尼諧振抑制作了分析。為簡(jiǎn)化電流控制器的復(fù)雜解耦,設(shè)計(jì)了αβ坐標(biāo)系下的比例諧振電流內(nèi)環(huán)控制器。在電網(wǎng)電壓畸變的情況下,設(shè)計(jì)了網(wǎng)側(cè)電流準(zhǔn)比例諧振控制(QPR,Quasi Proportional Resonant Control)內(nèi)環(huán)與重復(fù)控制外環(huán)疊加的復(fù)合控制策略。論文對(duì)控制策略進(jìn)行了細(xì)致的推導(dǎo),并從理論上分析了復(fù)合控制器對(duì)電網(wǎng)電壓畸變的抑制作用。在電網(wǎng)電壓畸變以及不平衡下采用基于雙二階廣義積分器的鎖相環(huán),對(duì)正、負(fù)序分量進(jìn)行分離,抑制諧波分量引起的相位波動(dòng),實(shí)現(xiàn)了對(duì)基波正序相位的準(zhǔn)確跟蹤。研究了控制網(wǎng)側(cè)電流平衡以及母線電壓平衡的電流控制策略,在Matlab/Simulink中搭建變流器在畸變及不平衡電網(wǎng)電壓下的仿真模型,對(duì)復(fù)合控制策略的有效性進(jìn)行了仿真驗(yàn)證。論文具體設(shè)計(jì)了主功率電路參數(shù)、外圍保護(hù)電路、采樣調(diào)理電路及驅(qū)動(dòng)電路,完成了系統(tǒng)控制策略中鎖相環(huán)模塊、QPR控制器模塊、重復(fù)控制器模塊、SVPWM模塊的數(shù)字化設(shè)計(jì)。最終,搭建了500W硬件實(shí)驗(yàn)平臺(tái),以TI公司的TMS320F28335芯片為主控制器,驗(yàn)證了各個(gè)模塊設(shè)計(jì)效果,并通過(guò)聯(lián)調(diào)驗(yàn)證了本文控制策略的有效性。
[Abstract]:Distributed power generation has been paid more and more attention in today's society. Energy storage system can play an important role in improving the uncertainty and power fluctuation of renewable energy generation. As an important interface equipment between renewable energy and power grid, energy storage converter is an important indicator of grid-connected current quality, such as harmonic distortion rate. In this paper, the typical LCL three-phase voltage source PWM converter is taken as the research object, and the current control strategy of the energy storage converter under the distorted grid voltage is studied. This paper introduces the topology and working principle of PWM converter, establishes the mathematical model of abc and 偽 尾 coordinate system, designs the parameters of abc filter and analyzes its active damping and passive damping resonance suppression. In order to simplify the complex decoupling of the current controller, a proportional resonant current inner loop controller in 偽 尾 coordinate system is designed. Under the condition of voltage distortion in power system, a compound control strategy is designed, in which the internal loop of QPR-Quasi proportional Resonant Control (QPR-Quasi proportional Control) and the external loop of repetitive control are superimposed. In this paper, the control strategy is deduced in detail, and the effect of the compound controller on the voltage distortion of the power system is analyzed theoretically. Under the condition of voltage distortion and unbalance, the phase locked loop based on double second order generalized integrator is used to separate the positive and negative sequence components, to suppress the phase fluctuation caused by harmonic components, and to realize the accurate tracking of the fundamental positive sequence phase. The current control strategy of current balance and bus voltage balance is studied. The simulation model of converter under distorted and unbalanced network voltage is built in Matlab / Simulink, and the effectiveness of the compound control strategy is verified by simulation. The main power circuit parameters, peripheral protection circuit, sampling conditioning circuit and driving circuit are designed in detail. The digital design of the QPR controller module and the SVPWM module of the repetitive controller module are completed in the system control strategy. Finally, the 500W hardware experiment platform is built, and the TMS320F28335 chip of TI company is used as the main controller, which verifies the design effect of each module, and verifies the effectiveness of the control strategy.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM46

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張學(xué)廣;馬彥;李瑞;張文杰;徐殿國(guó);;兩相靜止坐標(biāo)系下并網(wǎng)逆變器的重復(fù)控制策略[J];電工技術(shù)學(xué)報(bào);2016年09期

2 操豐梅;朱U，

本文編號(hào)：1992092