發(fā)布時間：2018-09-18 08:54

【摘要】：分布式光伏就是利用較小裝機(jī)規(guī)模的分散資源,將控發(fā)屯系統(tǒng)布置在靠近用戶的位置,一般接入不超過電壓等級為35千伏的電網(wǎng)。去年年底,我國分布式光伏發(fā)電裝機(jī)容量發(fā)展迅速,裝機(jī)容量無論新增或累計均為世界第一。隨著光狀發(fā)電大規(guī)模接入配電網(wǎng),光伏發(fā)電對配電網(wǎng)的影響也愈發(fā)明顯,為了使電網(wǎng)和光伏系統(tǒng)能后安全的運(yùn)行,研究光伏接入后對配電網(wǎng)的影響顯得尤為重要。論文對分布式光伏發(fā)電接入后對配電網(wǎng)產(chǎn)生的電能質(zhì)量向題進(jìn)行了研究,首先,詳細(xì)了解了光伏發(fā)電的發(fā)電結(jié)構(gòu)及原理,對集中式光伏與分布式光伏的優(yōu)缺點進(jìn)行了對比;其次,詳細(xì)分析了分布式廣伏發(fā)電原理及并網(wǎng)原則;再次,根據(jù)分布式光伏發(fā)電的不足,相應(yīng)地提出影響并網(wǎng)質(zhì)量的各個決定性因素,結(jié)合電網(wǎng)公司對分布式光伏屯站并網(wǎng)的技術(shù)要求,建立光伏發(fā)電接入配電網(wǎng)的電路模型,認(rèn)真研究了分布式光伏及電接入配電網(wǎng)后}f電網(wǎng)帶來的各種有關(guān)電能質(zhì)量的問題。通過在Matlah/Simulink中仿真模校型的搭建,研究分布式光伏發(fā)電接入后會對配電網(wǎng)電能質(zhì)量產(chǎn)生什么影響,并找到影響配電網(wǎng)電能質(zhì)量的重要因素,確定可以解決分布式光伏接入后對消除其對配電網(wǎng)影響的策略。
[Abstract]:Distributed photovoltaic (DPV) is to use the distributed resources of small installed scale to arrange the control and transmission system in the position near the user, and to access the power network with a voltage level of not more than 35 KV. At the end of last year, the installed capacity of distributed photovoltaic generation in China developed rapidly. With the large-scale access of photovoltaic generation to distribution network, the influence of photovoltaic generation on distribution network is becoming more and more obvious. In order to make the grid and photovoltaic system run safely, it is particularly important to study the impact of photovoltaic access on distribution network. This paper studies the power quality of distribution network after the distributed photovoltaic generation is connected. Firstly, the structure and principle of photovoltaic generation are understood in detail, and the advantages and disadvantages of centralized photovoltaic and distributed photovoltaic are compared. Secondly, the principle of distributed wide volt generation and the principle of grid connection are analyzed in detail. Thirdly, according to the shortage of distributed photovoltaic power generation, the decisive factors affecting the quality of grid connection are put forward accordingly. According to the technical requirements of distributed photovoltaic stations connected to grid, the circuit model of photovoltaic power generation connecting to distribution network is established, and the problems about power quality brought about by distributed photovoltaic and electricity connected to distribution network} f are studied in detail. By setting up the simulation model in Matlah/Simulink, this paper studies the influence of distributed photovoltaic power generation on the power quality of distribution network, and finds out the important factors that affect the power quality of distribution network. The strategy to eliminate the influence of distributed photovoltaic access on distribution network is determined.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM615

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