本文選題：受端電網(wǎng)　切入點：短路電流　出處：《華北電力大學》2014年碩士論文

【摘要】：中國電力能源與負荷中心分離的特性,使得我國電網(wǎng)呈現(xiàn)送端和受端兩極特性。隨著特高壓建設(shè)工程的推進,系統(tǒng)間電氣距離日益縮小,加上受端電網(wǎng)內(nèi)部結(jié)構(gòu)聯(lián)系過于緊密,使得短路電流超標的現(xiàn)象逐年加重,嚴重制約著電網(wǎng)的發(fā)展。因此,研究如何解決受端電網(wǎng)已成為電網(wǎng)當前建設(shè)的當務(wù)之急。 受端電網(wǎng)由于內(nèi)部自供電源所占比例逐年減小,系統(tǒng)連接過于緊密,短路電流水平呈現(xiàn)出以下特點：局部站點超標和區(qū)域性短路電流水平過高。本文主要針對受端電網(wǎng)的這兩個特性進行分析和研究,得出適用于不同情況的限流措施。 本文首先研究和對比現(xiàn)行應(yīng)用的多種限流措施特點,總結(jié)各種限流措施的限流原理以及對受端電網(wǎng)的適用性。然后,就受端電網(wǎng)局部站點短路電流超標的現(xiàn)象,建立自阻抗模型,分析其超標機理,得出基于電網(wǎng)網(wǎng)絡(luò)參數(shù)的限流措施優(yōu)化選擇模型,應(yīng)用于某實際電網(wǎng),計算結(jié)果證明該模型的有效性。最后本文就區(qū)域性短路電流水平過高的問題,分析短路電流分布不均勻產(chǎn)生的原因以及目前電網(wǎng)采取的限流方案,總結(jié)不同分區(qū)模式限制短路電流的特點,提出基于熵權(quán)理論的多目標決策的限流方案優(yōu)化模型,用以選擇最優(yōu)限流方案,應(yīng)用于某實際電網(wǎng)證明其有效性和實用性。
[Abstract]:Because of the separation of power source and load center in China, the power grid in China is characterized by two poles: the terminal and the receiver.With the development of UHV construction project, the electric distance between the systems is shrinking day by day, and the internal structure of the receiving network is too close, which makes the short-circuit current exceed the standard, which seriously restricts the development of the power grid.Therefore, the research on how to solve the receiving power grid has become the urgent task of the current power grid construction.Because the proportion of internal self-supply power is decreasing year by year, the system connection is too tight, and the short-circuit current level shows the following characteristics: the local stations exceed the standard and the regional short-circuit current level is too high.In this paper, the two characteristics of the receiver power network are analyzed and studied, and the current limiting measures suitable for different situations are obtained.In this paper, the characteristics of various current limiting measures are studied and compared, and the current limiting principle and applicability of the current limiting measures to the receiving power network are summarized.Then, the self-impedance model is established for the phenomenon that the short-circuit current of the local station of the receiving network exceeds the standard, and the mechanism of exceeding the standard is analyzed, and the optimal selection model of the current limiting measures based on the network parameters is obtained, which is applied to a practical power network.The results show that the model is effective.Finally, this paper analyzes the causes of the uneven distribution of short-circuit current and the current limiting scheme adopted in the current power network, and summarizes the characteristics of limiting short-circuit current in different zonal modes, aiming at the problem of high level of regional short-circuit current.An optimization model of multi-objective decision limiting scheme based on entropy weight theory is proposed, which is used to select the optimal current limiting scheme. It is applied to a practical power network to prove its validity and practicability.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM713

【參考文獻】

相關(guān)期刊論文 前10條

1 周吉安;靳丹;王維洲;但揚清;劉文穎;;大電源接入方式對短路電流的影響分析[J];電工電能新技術(shù);2012年01期

2 李繼紅,黃良寶,徐謙,李海翔;一種降低短路電流水平的措施——母線分裂運行[J];電力系統(tǒng)自動化;2001年14期

3 郝志杰,江道灼,蔡永華;新型固態(tài)故障限流器對電力系統(tǒng)暫態(tài)穩(wěn)定性的影響[J];電力系統(tǒng)自動化;2004年08期

4 孫奇珍;蔡澤祥;李愛民;李力;吳科成;;500kV電網(wǎng)短路電流超標機理及限制措施適應(yīng)性[J];電力系統(tǒng)自動化;2009年21期

5 徐賢;丁濤;萬秋蘭;;限制短路電流的220kV電網(wǎng)分區(qū)優(yōu)化[J];電力系統(tǒng)自動化;2009年22期

6 阮前途;上海電網(wǎng)短路電流控制的現(xiàn)狀與對策[J];電網(wǎng)技術(shù);2005年02期

7 陸國慶;姜新宇;江健武;張勝保;劉順桂;何冰;章彬;;110kV及220kV系統(tǒng)變壓器中性點經(jīng)小電抗接地方式的研究及其應(yīng)用[J];電網(wǎng)技術(shù);2006年01期

8 袁娟;劉文穎;董明齊;史可琴;范越;;西北電網(wǎng)短路電流的限制措施[J];電網(wǎng)技術(shù);2007年10期

9 于化鵬;陳水明;楊鵬程;印華;崔婷;;220kV變壓器中性點經(jīng)小電抗接地方式[J];電網(wǎng)技術(shù);2011年01期

10 王非;李群炬;;京津唐電網(wǎng)限制短路電流問題探討[J];華北電力技術(shù);2007年04期

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