【摘要】：大區(qū)域互聯(lián)電網(wǎng)規(guī)模的擴大對系統(tǒng)的動態(tài)安全穩(wěn)定問題的影響日趨嚴重,系統(tǒng)出現(xiàn)故障而引起的失步及連鎖跳閘會對整個電網(wǎng)造成不可估量的損失。為提高和健全電力系統(tǒng)安全穩(wěn)定性,完善“三道防線”的建設(shè)迫在眉睫。解列是保證系統(tǒng)安全運行的重要措施,作為保障電網(wǎng)安全穩(wěn)定運行的最后一道防線,可以有效地防止事故的進一步擴大。而同調(diào)分群作為解列控制的重要前提,作用體現(xiàn)在簡化動態(tài)行為,令系統(tǒng)迅速恢復(fù)同步。近年來通信技術(shù)的不斷革新以及相量測量單元(Phasor Measurement Unit,PMU)的實際應(yīng)用,為同調(diào)分群和解列等本已較成熟的課題的研究注入了新的生機和活力,在大區(qū)域電網(wǎng)互聯(lián)的復(fù)雜背景下涌現(xiàn)出了大量的實踐突破和大膽創(chuàng)新�；趶V域測量系統(tǒng)(Wide Area Information System,WAMS),本文重點對以下兩方面進行深入的探究:(1)提出了一種快速、有效的同調(diào)分群新方法,實現(xiàn)在線進行發(fā)電機分群的同時,克服了計算量大、實現(xiàn)時間長等缺點;(2)提出了一種新的解列方案,不受系統(tǒng)運行方式變化和結(jié)構(gòu)改變的影響。將離散Fréchet距離應(yīng)用于發(fā)動機組的在線分群,源數(shù)據(jù)為WAMS中實測的發(fā)電機功角。將采樣功角值三角函數(shù)擬合面積差預(yù)分群后,再利用離散Fréchet距離達到在線分群的最終結(jié)果。與現(xiàn)有分群方法相比,該方法不受模型參數(shù)影響,適用于不同故障場景,尤其適用于復(fù)雜大系統(tǒng),能夠?qū)崟r對系統(tǒng)進行動態(tài)分群。分析了系統(tǒng)失步時兩側(cè)電勢幅值不等及系統(tǒng)運行方式變化對振蕩中心和失步中心的影響。構(gòu)造了一種能夠反映振蕩中心隨功角擺開漂移的振蕩中心位置函數(shù),在此基礎(chǔ)上提出了一種新的解列方案。該方案利用振蕩中心位置函數(shù)的變化率輔助ucos?啟動解列裝置,克服了實際系統(tǒng)中電勢幅值不相等情況下基于ucos?判據(jù)存在的缺陷。再綜合振蕩中心的漂移特點、失步中心的位置和解列后孤島不平衡度來搜索解列斷面。該方案能夠捕捉振蕩中心的變化軌跡和失步中心的位置。在選擇和速動性得到保證的同時提高了解列裝置的可靠性。
[Abstract]:The problem of dynamic security and stability is becoming more and more serious due to the expansion of the scale of large area interconnected power network. The loss of step and tripping caused by the failure of the system will cause incalculable losses to the whole power network. In order to improve and improve the safety and stability of power system, it is urgent to perfect the construction of "three lines of defense". De-listing is an important measure to ensure the safe operation of the system. As the last line of defense to ensure the safe and stable operation of the power grid, it can effectively prevent the further expansion of the accident. As an important premise of decoupling control, homology cluster can simplify the dynamic behavior and make the system restore synchronization quickly. In recent years, the continuous innovation of communication technology and the practical application of phasor measurement unit (Phasor Measurement Unit,PMU) have injected new vitality and vitality into the research of more mature subjects such as homology, grouping and uniting. A large number of practical breakthroughs and bold innovations have emerged under the complex background of large area power grid interconnection. Based on the wide-area measurement system (Wide Area Information System,WAMS), this paper focuses on the following two aspects: (1) A fast and effective homology clustering method is proposed to realize the on-line generator clustering at the same time. It overcomes the shortcomings of large computation and long time of realization. (2) A new de-listing scheme is proposed, which is not affected by the change of system operation mode and structure. The discrete Fr 茅 chet distance is applied to the on-line clustering of the engine group. The source data is the generator power angle measured in WAMS. After the sampling work angle trigonometric function is used to fit the area difference pregroup, the final result of on-line clustering is obtained by using the discrete Fr 茅 chet distance. Compared with existing clustering methods, this method is not affected by model parameters, and is suitable for different fault scenarios, especially for complex large scale systems, and it can dynamically cluster the system in real time. The influence of the amplitude difference of the two sides potential and the operation mode of the system on the oscillation center and the out-of-step center are analyzed when the system is out of step. A position function of the oscillation center which can reflect the shift of the oscillation center with the angle of work is constructed. On the basis of the function, a new scheme is proposed to solve the problem. This scheme uses the rate of variation of the oscillatory center position function to assist ucos? Start the disassembly device, overcome the potential amplitude in the actual system is not equal based on ucos? The defect of the criterion. Combining the drift characteristics of the oscillation center, the location of the out-of-step center and the unbalance degree of the island behind the train are used to search the discontinuous section. The scheme can capture the changing track of the oscillation center and the position of the out-of-step center. The reliability of the column device is improved while selection and rapidity are guaranteed.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM712

【參考文獻】

相關(guān)期刊論文 前10條

1 劉志雄;張艷霞;馮康恒;馬樺巖;李婷;;基于廣域信息跟蹤電力系統(tǒng)振蕩中心的方法及應(yīng)用[J];電網(wǎng)技術(shù);2014年06期

2 程云峰;張欣然;陸超;;廣域測量技術(shù)在電力系統(tǒng)中的應(yīng)用研究進展[J];電力系統(tǒng)保護與控制;2014年04期

3 宋洪磊;吳俊勇;冀魯豫;;基于慢同調(diào)理論和希爾伯特-黃變換的發(fā)電機在線同調(diào)識別[J];電力自動化設(shè)備;2013年08期

4 吳麟琳;黃少鋒;;基于頻率特征的失步解列判據(jù)原理[J];電力自動化設(shè)備;2013年01期

5 黃少鋒;吳麟琳;;基于電氣量頻率差異的電力系統(tǒng)振蕩識別[J];電力系統(tǒng)自動化;2012年23期

6 吳為;湯涌;孫華東;徐式蘊;;基于廣域量測信息的電力系統(tǒng)暫態(tài)穩(wěn)定研究綜述[J];電網(wǎng)技術(shù);2012年09期

7 張園園;龔慶武;陳道君;劉棟;;應(yīng)用改進粒子群優(yōu)化的模糊均值聚類算法的暫態(tài)穩(wěn)定機組分群方法[J];電網(wǎng)技術(shù);2011年09期

8 范瑾;;電力系統(tǒng)失步解列研究綜述[J];西安郵電學院學報;2011年03期

9 張保會;汪成根;郝治國;;電力系統(tǒng)失步解列存在的問題及需要開展的研究[J];電力自動化設(shè)備;2010年10期

10 劉絢;文俊;劉天琪;;基于自組織神經(jīng)網(wǎng)絡(luò)的模糊聚類同調(diào)機群識別[J];電網(wǎng)技術(shù);2010年07期

相關(guān)碩士學位論文 前5條

1 陳濤;基于PMU的同調(diào)機群識別及電網(wǎng)暫態(tài)穩(wěn)定性預(yù)測新方法[D];華北電力大學（北京）;2009年

2 高曉磊;基于離散Fréchet距的在線手寫簽名認證算法研究[D];武漢理工大學;2008年

3 董紹光;基于PMU的系統(tǒng)失步解列研究[D];山東大學;2007年

4 何孝軍;電力系統(tǒng)動態(tài)等值中同調(diào)機群聚類方法研究[D];河海大學;2007年

5 李海燕;基于WAMS的電力系統(tǒng)暫態(tài)穩(wěn)定預(yù)測方法研究[D];華北電力大學（北京）;2006年

，

本文編號：2335758