本文選題：關(guān)鍵斷面 + 模糊聚類　； 參考：《華北電力大學(xué)》2017年碩士論文

【摘要】：當(dāng)前,隨著國民用電的增加和經(jīng)濟的發(fā)展,電力系統(tǒng)的規(guī)模日趨龐大,電網(wǎng)結(jié)構(gòu)和電力系統(tǒng)運行方式日趨復(fù)雜。相應(yīng)的對電力系統(tǒng)安全運行的可靠性提出了更高的要求。對系統(tǒng)中的所有線路都進行重點監(jiān)控是不現(xiàn)實的。關(guān)鍵斷面是電力系統(tǒng)中的薄弱環(huán)節(jié),很多嚴重的停電事故都是由關(guān)鍵斷面上線路的連鎖反應(yīng)故障引起的。因此,對系統(tǒng)中的關(guān)鍵斷面進行研究具有很強的現(xiàn)實意義。該領(lǐng)域的研究也是當(dāng)下研究的熱點之一。本文主要對關(guān)鍵斷面的快速識別及其輸電極限兩方面的內(nèi)容展開了研究。在現(xiàn)有的識別系統(tǒng)關(guān)鍵斷面的算法中,模糊聚類法由于無需事先給定分類個數(shù),可以有效避免人為因素的主觀影響而得到了廣泛的應(yīng)用。論文所提斷面識別方法主要分為初始斷面的確定、候選關(guān)鍵斷面的確定以及關(guān)鍵斷面的確定三個步驟。在確定候選關(guān)鍵斷面線路時,論文提出了“中轉(zhuǎn)站”的概念,采用基于汽車接力模型的算法實現(xiàn)對包含某兩條線路的最短回路的快速搜索,避免了復(fù)雜的矩陣運算。在確定關(guān)鍵斷面時,論文定義并計算了考慮輸電裕度和潮流增加的關(guān)鍵度指標。采用所提方法能夠有效地避免漏選線路。以IEEE標準節(jié)點系統(tǒng)算例驗證了所提算法的有效性。當(dāng)關(guān)鍵斷面中潮流較重的線路發(fā)生故障而被切除時,及時計算出斷面的輸電極限值能夠為調(diào)度員在保證系統(tǒng)安全穩(wěn)定的前提下,制定正確的控制措施提供有力的參考,從而充分利用已有的輸電資源,避免過甩負荷、過切機組等。輸電斷面的有功潮流控制是實際電網(wǎng)運行中的重要預(yù)防控制手段,準確掌握關(guān)鍵斷面的輸電極限是調(diào)控斷面潮流的前提。論文首先對關(guān)鍵斷面N-1約束下的最大傳輸潮流進行了計算,并提出了基于廣義發(fā)電分布因子(GGDF)定向控制提升斷面輸電極限的算法,該算法考慮了平衡機對斷面潮流的控制,且無需保證總發(fā)電量為常數(shù),更加符合實際工況。輸電斷面暫態(tài)穩(wěn)定傳輸功率極限是衡量系統(tǒng)穩(wěn)定性的重要指標。論文對斷面的暫穩(wěn)極限傳輸功率進行了研究,提出了斷面暫穩(wěn)極限傳輸功率計算算法。該算法以斷面主導(dǎo)的系統(tǒng)暫態(tài)穩(wěn)定裕度趨于臨界值為目標,經(jīng)過多次迭代直至由該斷面主導(dǎo)的系統(tǒng)暫態(tài)穩(wěn)定裕度接近臨界值,此時斷面的功率即為暫穩(wěn)傳輸極限值。在IEEE39節(jié)點系統(tǒng)中證明了該算法的有效性。
[Abstract]:At present, with the increase of national power consumption and the development of economy, the scale of power system is becoming larger and larger, and the structure of power network and the operation mode of power system are becoming more and more complex. Accordingly, the reliability of power system safety operation has been put forward higher requirements. It is unrealistic to focus on monitoring all circuits in the system. The critical section is the weak link in the power system, and many serious power outages are caused by the chain reaction fault of the line on the key section. Therefore, it is of great practical significance to study the key sections of the system. The research in this field is also one of the hotspots of current research. In this paper, the fast identification of key sections and its transmission limit are studied. In the existing algorithms for identifying the key sections of the system fuzzy clustering method has been widely used because it can avoid the subjective influence of human factors effectively without giving the number of classification in advance. The method is divided into three steps: the determination of the initial section, the determination of the candidate key section and the determination of the key section. The concept of "transfer station" is proposed in this paper, and the algorithm based on vehicle relay model is used to quickly search the shortest circuit containing two circuits, thus avoiding the complex matrix operation. In order to determine the critical section, the critical index considering transmission margin and power flow increase is defined and calculated. The proposed method can effectively avoid missing circuit. The effectiveness of the proposed algorithm is verified by an example of IEEE standard node system. When the line with heavy power flow in the critical section is cut off, calculating the transmission limit of the section in time can provide a powerful reference for the dispatcher to formulate the correct control measures on the premise of ensuring the safety and stability of the system. In order to make full use of existing transmission resources, avoid overload rejection, over-cut units and so on. The active power flow control of transmission section is an important preventive control method in actual power network operation, and it is the premise of regulating section power flow to accurately grasp the transmission limit of key section. In this paper, the maximum transmission power flow under N-1 constraint on key sections is first calculated, and an algorithm for directional control of transmission limit of lifting section based on generalized generation distribution factor (GGDF) is proposed. The algorithm takes into account the control of cross-section power flow by balancer. There is no need to ensure that the total power generation is constant, more in line with the actual working conditions. Transmission power limit of transient stability of transmission section is an important index to measure system stability. In this paper, the transmissibility power of the transient stability limit of the section is studied, and the calculation algorithm of the transmissible power of the transient stability of the section is put forward. In this algorithm, the transient stability margin of the cross-section dominated system tends to the critical value, and the transient stability margin of the system dominated by the section is close to the critical value after several iterations. At this time, the power of the section is the transient stability transmission limit value. The effectiveness of the algorithm is proved in the IEEE39 node system.
【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】：2017
【分類號】：TM711

【參考文獻】

相關(guān)期刊論文 前10條

1 宋勱;張騰飛;甘燕;;基于改進的廣度優(yōu)先搜索的潮流追蹤[J];電氣開關(guān);2015年06期

2 方勇杰;崔曉丹;王勝明;黃智達;;暫態(tài)穩(wěn)定極限耦合的多個輸電斷面極限功率協(xié)調(diào)計算[J];電力系統(tǒng)自動化;2015年22期

3 湯堯;楊文輝;;基于功率傳輸路徑的輸電斷面搜索方法[J];電氣應(yīng)用;2015年21期

4 鄭曙光;劉觀起;劉獻超;;基于汽車接力的潮流轉(zhuǎn)移快速搜索算法[J];電測與儀表;2015年15期

5 徐巖;郅靜;;基于功率靈敏度和機組再調(diào)度的割集斷面潮流定向控制[J];電網(wǎng)技術(shù);2015年08期

6 劉獻超;任建文;渠衛(wèi)東;;基于廣度優(yōu)先法的多支路連鎖切除潮流轉(zhuǎn)移快速搜索算法[J];電力系統(tǒng)自動化;2015年13期

7 張富超;鐘成元;張富春;劉耿華;黃家棟;;基于源流路徑剖分的輸電斷面快速搜索[J];電力系統(tǒng)保護與控制;2015年12期

8 侯俊賢;韓民曉;董毅峰;王毅;卜廣全;;基于子網(wǎng)絡(luò)收縮的輸電斷面搜索方法[J];電力系統(tǒng)保護與控制;2015年12期

9 任建文;魏俊姣;;基于GN分區(qū)的輸電斷面快速搜索[J];現(xiàn)代電力;2015年03期

10 趙晉泉;錢莉;陳剛;;一種基于EEAC和軌跡靈敏度的暫態(tài)穩(wěn)定約束最優(yōu)潮流模型與方法[J];電力系統(tǒng)保護與控制;2015年09期

相關(guān)博士學(xué)位論文 前1條

1 汪慶淼;基于目標函數(shù)的模糊聚類新算法及其應(yīng)用研究[D];江蘇大學(xué);2014年

，

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