發(fā)布時(shí)間：2018-04-15 09:29

  本文選題：直流配電網(wǎng) + 拓?fù)浣Y(jié)構(gòu)　； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：隨著經(jīng)濟(jì)的發(fā)展與人民生活水平的提高,口益增長(zhǎng)的負(fù)荷與輸電走廊輸送電力限制之間的矛盾逐漸顯現(xiàn),我國(guó)現(xiàn)有交流配電網(wǎng)供電半徑小、供電能力有限,不足以承擔(dān)未來(lái)社會(huì)對(duì)配電網(wǎng)的要求；相比之下,直流配電網(wǎng)具有線路成本低、傳輸容量大、供電范圍遠(yuǎn)、網(wǎng)絡(luò)損耗小、電能質(zhì)量高、轉(zhuǎn)換效率高等優(yōu)勢(shì),成為未來(lái)配電網(wǎng)的發(fā)展方向。 本文以直流配電網(wǎng)的拓?fù)浣Y(jié)構(gòu)與可靠性為主要研究?jī)?nèi)容,從配電網(wǎng)絡(luò)的元件連接方式與運(yùn)行方式角度出發(fā),在現(xiàn)有的應(yīng)用在通信系統(tǒng)、船舶系統(tǒng)、地鐵電力牽引系統(tǒng)和航天動(dòng)力系統(tǒng)的結(jié)構(gòu)與成熟交流配電網(wǎng)的結(jié)構(gòu)的基礎(chǔ)上,以直流配電的特性為依據(jù),提出交直流混合配電系統(tǒng)和純直流配電系統(tǒng)的可行拓?fù)浣Y(jié)構(gòu),并對(duì)交直流環(huán)型網(wǎng)絡(luò)運(yùn)行方式進(jìn)行了比照分析。 通過(guò)對(duì)現(xiàn)有可靠性模型評(píng)估方法的對(duì)比研究,本文選取能夠?qū)﹄娋W(wǎng)進(jìn)行實(shí)時(shí)模擬的序貫蒙特卡洛評(píng)估方法,為保證計(jì)算的精度和速度,運(yùn)用了故障遍歷方法對(duì)故障與負(fù)荷進(jìn)行兩次搜索,通過(guò)對(duì)負(fù)荷的分類完善了統(tǒng)計(jì)可靠性指標(biāo)的方法。 最后,文章將提出的模型和算法應(yīng)用到IEEE RBTS Bus6節(jié)點(diǎn)算例中。通過(guò)對(duì)交流模式下系統(tǒng)與負(fù)荷可靠性指標(biāo)的計(jì)算,驗(yàn)證了模型和算法的科學(xué)性、準(zhǔn)確性；應(yīng)用此算例與算法,同時(shí)計(jì)算了現(xiàn)有設(shè)備下直流配電系統(tǒng)的可靠性指標(biāo),并對(duì)電力電子器件進(jìn)行了適應(yīng)性分析,最終對(duì)所得結(jié)果進(jìn)行了詳細(xì)的闡述。
[Abstract]:With the development of economy and the improvement of people's living standard, the contradiction between the increasing load and the limit of transmission power in the transmission corridor gradually appears. The current AC distribution network in our country has a small power supply radius and limited power supply capacity.By contrast, DC distribution network has the advantages of low line cost, large transmission capacity, long power supply range, low network loss, high power quality and high conversion efficiency.Become the future distribution network development direction.In this paper, the topology and reliability of DC distribution network are taken as the main research contents. From the point of view of component connection and operation mode of distribution network, it is used in the existing communication system and ship system.Based on the structure of metro traction system and space power system and the structure of mature AC distribution network, based on the characteristics of DC distribution, the feasible topology of AC / DC hybrid distribution system and pure DC distribution system is proposed.The operation mode of AC-DC ring network is compared and analyzed.By comparing the existing reliability model evaluation methods, this paper selects sequential Monte Carlo evaluation method which can simulate the power network in real time, in order to ensure the accuracy and speed of calculation.The method of fault traversal is used to search the fault and load twice, and the statistical reliability index is improved by classifying the load.Finally, the proposed model and algorithm are applied to the IEEE RBTS Bus6 node.By calculating the reliability index of the system and load in AC mode, the scientific and accuracy of the model and algorithm are verified, and the reliability index of DC distribution system under the existing equipment is calculated by using this example and algorithm.The adaptability of power electronic devices is analyzed, and the results are described in detail.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM732

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本文編號(hào)：1753541