發(fā)布時(shí)間：2018-03-25 05:36

  本文選題：直流輸電　切入點(diǎn)：多直流饋入　出處：《東北電力大學(xué)》2017年碩士論文

【摘要】：我國(guó)的經(jīng)濟(jì)發(fā)展情況和能源儲(chǔ)備情況大體呈逆向分布,因此電力能源大范圍的流動(dòng)配置成了我國(guó)電力能源的主要發(fā)展方向,國(guó)家提出了將西南地區(qū)水電向東送和南北地區(qū)互相支撐的全國(guó)聯(lián)網(wǎng)發(fā)展戰(zhàn)略。比較交直流兩種輸電形式,在運(yùn)送距離、輸送容量和操作控制性能方面直流輸電都有其獨(dú)特優(yōu)勢(shì),得到了快速發(fā)展。因此,研究多直流之間的電壓交互作用機(jī)理,在受端區(qū)域合理分配高密度的直流輸電線路站址落點(diǎn),將對(duì)以后的交直流混合電網(wǎng)安全穩(wěn)定性和運(yùn)行可靠性方面意義重大。本文針對(duì)多直流饋入輸電系統(tǒng)的發(fā)展以及研究現(xiàn)狀進(jìn)行了簡(jiǎn)單分析介紹,通過(guò)總結(jié)已有研究成果重點(diǎn)分析了多直流饋入輸電系統(tǒng)的電壓交互作用機(jī)理和多饋入交互影響因子(Multi-Infeed Interaction Factor,MIIF)指標(biāo)及表征直流輸電電壓穩(wěn)定性的量化指標(biāo)多饋入短路比(Multi-Infeed Short Circuit Ratio,MISCR)。針對(duì)多條直流同時(shí)落點(diǎn)到同一受端區(qū)域的情況,推導(dǎo)了多端口戴維南等值定理并建立了多直流饋入系統(tǒng)的等值模型,進(jìn)行了等值分析。電壓穩(wěn)定是直流線路穩(wěn)定運(yùn)行的關(guān)鍵,直流線路的電壓超出穩(wěn)定范圍將導(dǎo)致?lián)Q相失敗、直流閉鎖等情況。本文依據(jù)電壓穩(wěn)定性指標(biāo)MISCR和分區(qū)理論相結(jié)合分別提出了依據(jù)關(guān)聯(lián)指標(biāo)分區(qū)的選點(diǎn)方法和依據(jù)耦合作用指標(biāo)聚類(lèi)分區(qū)的多直流規(guī)劃選點(diǎn)方法,針對(duì)兩種不同的分區(qū)方法,分別使用線性加權(quán)法和變權(quán)評(píng)估法對(duì)分區(qū)后的方案進(jìn)行了評(píng)估。最后對(duì)IEEE 14節(jié)點(diǎn)系統(tǒng)進(jìn)行選點(diǎn)規(guī)劃,通過(guò)傳統(tǒng)方法與本文所提方法結(jié)果對(duì)比驗(yàn)證了本文所提出的分區(qū)指標(biāo)和評(píng)估方案的有效性。
[Abstract]:The economic development and energy reserves of our country are generally distributed in reverse, so the flow and distribution of power energy on a large scale has become the main development direction of our country's electric power energy. The state has put forward a national network development strategy of sending hydropower east to the southwest and supporting each other in the north and south regions. Comparing the two forms of AC and DC transmission, DC transmission has its unique advantages in terms of transportation distance, transport capacity and operation control performance. Therefore, the mechanism of multi-DC voltage interaction is studied, and the location of high-density HVDC transmission lines is reasonably distributed in the receiving end area. It will be of great significance to the safety, stability and operation reliability of AC / DC hybrid power network in the future. In this paper, the development and research status of multi-DC feed-in transmission system are briefly analyzed and introduced. In this paper, the mechanism of voltage interaction, the multi-feed Interaction factor MIIFI index and the quantificational index of voltage stability of HVDC transmission system are analyzed. Multi-Infeed Short Circuit Ratio MISCRN. For multiple direct-current simultaneous landing points to the same receiving area, In this paper, the equivalence theorem of multi-port Davinan is derived, and the equivalent model of multi-DC feed-in system is established, and the equivalent analysis is carried out. Voltage stability is the key to the steady operation of DC line, and if the voltage of DC line exceeds the stable range, commutation failure will occur. Based on voltage stability index (MISCR) and partition theory, this paper presents a method of selecting points according to correlation index and cluster partition based on coupling action index. For two different partitioning methods, linear weighting method and variable weight evaluation method are used to evaluate the scheme after partitioning. Finally, the IEEE 14-node system is selected for point planning. The results of the traditional method and the proposed method are compared to verify the effectiveness of the proposed zoning index and evaluation scheme.
【學(xué)位授予單位】：東北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM721.1

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本文編號(hào)：1661796