本文選題：分布式發(fā)電 + 光伏電源模型　； 參考：《華北電力大學(xué)》2015年碩士論文

【摘要】：目前,以太陽光能為能量來源的光伏發(fā)電技術(shù)已經(jīng)日趨成熟,并且達到了大規(guī)模商業(yè)和工業(yè)化應(yīng)用的水平�？梢灶A(yù)見,在未來的一段時期內(nèi),各國電網(wǎng)中將會出現(xiàn)大量的光伏并網(wǎng)發(fā)電電源。光伏電源的接入,一方面有效地緩解了各國,尤其是以我國為代表的經(jīng)濟發(fā)展迅速、對能源需求量巨大的國家的用電緊張局面；另一方面又不可避免地造成了對傳統(tǒng)電網(wǎng)的影響。由于光伏電源本身的輸出電壓低、單個裝置的發(fā)電容量小,因此一般直接接入配電網(wǎng)絡(luò)中,因而會對傳統(tǒng)的配電網(wǎng)絡(luò)造成各方面的影響。本專題從配電網(wǎng)絡(luò)短路故障分析的角度出發(fā),研究光伏電源并網(wǎng)后,對配電網(wǎng)絡(luò)短路故障造成的影響,希望能為今后光伏電源的并網(wǎng)與運行規(guī)則制定提供參考意見。本文利用各種仿真實驗來驗證本文所提出的光伏電源模型及其控制器設(shè)計的正確性,研究了仿真結(jié)果是否與傳統(tǒng)電力系統(tǒng)分析所得到的結(jié)論相符,在驗證模型正確性的基礎(chǔ)上,今后將把該模型推廣至其他光伏并網(wǎng)項目的研究與應(yīng)用中。其次,利用在仿真軟件中搭建的光伏電源電路模型進行各種仿真實驗,研究光伏電源并網(wǎng)后,對傳統(tǒng)的配電網(wǎng)絡(luò)短路電流計算與分析所造成的影響,仿真結(jié)果表明：短路故障期間,光伏電源的短路電流會迅速達到飽和值,短路故障期間,光伏電源模型的各個環(huán)節(jié)能夠正確地響應(yīng)外部擾動,通過對不同因素在短路故障期間對光伏電源輸出電流的影響的分析可知,光伏電源所采用的模型、并網(wǎng)結(jié)構(gòu)、出口處是否有并聯(lián)濾波電容等因素并不會對光伏電源在短路故障期間的輸出電流造成明顯的影響,光伏電源并網(wǎng)后雖然改變了傳統(tǒng)配電網(wǎng)絡(luò)的結(jié)構(gòu),但其對網(wǎng)絡(luò)中短路電流的分布與大小所造成的影響并不明顯,且這種影響均符合傳統(tǒng)短路故障分析所形成的已有結(jié)論：距離故障位置越近,短路期間輸出電流越大；滲透率水平越高,貢獻的短路電流越大；不對稱短路故障時也會輸出負序電流。
[Abstract]:At present, photovoltaic (PV) power generation technology with solar energy as energy source has become more and more mature, and has reached the level of large-scale commercial and industrial applications. It can be predicted that there will be a large number of grid-connected photovoltaic power sources in the power grid in the future. On the one hand, the access of photovoltaic power has effectively alleviated the shortage of electricity in all countries, especially in the countries where China is the representative of the rapid economic development and huge demand for energy. On the other hand, it inevitably causes the influence on the traditional power grid. Because the output voltage of photovoltaic power supply itself is low and the generating capacity of a single device is small, it is usually directly connected to the distribution network, which will affect the traditional distribution network in all aspects. From the point of view of short-circuit fault analysis of distribution network, this paper studies the influence of photovoltaic power supply on short-circuit fault of distribution network after grid-connected, and hopes to provide reference for future grid-connected photovoltaic power supply and operation rules. In this paper, a variety of simulation experiments are used to verify the correctness of the proposed photovoltaic power supply model and its controller design. The simulation results are in accordance with the conclusions of the traditional power system analysis. On the basis of verifying the correctness of the model, this paper studies whether the simulation results are consistent with the conclusions of the traditional power system analysis. The model will be extended to the research and application of other photovoltaic grid-connected projects in the future. Secondly, using the photovoltaic power circuit model built in the simulation software to carry out various simulation experiments, the influence of photovoltaic power grid connection on the traditional short-circuit current calculation and analysis of distribution network is studied. The simulation results show that the short circuit current of photovoltaic power supply will reach saturation value rapidly during short circuit fault, and each link of photovoltaic power supply model can respond to external disturbance correctly during short circuit fault. Through the analysis of the influence of different factors on the output current of photovoltaic power supply during the short-circuit fault, we can know that the model of photovoltaic power supply, grid-connected structure, Whether there are parallel filter capacitors at the outlet will not have a significant impact on the output current of photovoltaic power during short-circuit fault. Although the structure of the traditional distribution network has been changed after the photovoltaic power is connected to the grid, However, its influence on the distribution and size of short-circuit current in the network is not obvious, and this effect accords with the existing conclusions of traditional short-circuit fault analysis: the closer to the fault location, the greater the output current during short-circuit; The higher the permeability level, the greater the contribution of short circuit current, and the negative sequence current will be output when asymmetric short circuit fault.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM713

【參考文獻】

相關(guān)期刊論文 前3條

1 王守相;江興月;王成山;;含分布式電源的配電網(wǎng)故障分析疊加法[J];電力系統(tǒng)自動化;2008年05期

2 張小平，陳珩;不對稱三相電力系統(tǒng)潮流、故障的統(tǒng)一分析法[J];電力系統(tǒng)自動化;1994年08期

3 王成山;李鵬;;2011年國際供電會議系列報道 分布式能源發(fā)展與用戶側(cè)電能的高效利用[J];電力系統(tǒng)自動化;2012年02期

，

本文編號：1986896