本文選題：大電源外送系統(tǒng) + 次同步振蕩　； 參考：《華中科技大學(xué)》2014年博士論文

【摘要】：我國的能源資源和電力負(fù)荷分布狀況決定了我國“西電東送,北電南送”的大規(guī)模、遠(yuǎn)距離輸電發(fā)展格局。為提高輸送容量,大型電源基地外送系統(tǒng)廣泛采用了串聯(lián)電容補(bǔ)償和高壓直流輸電技術(shù),系統(tǒng)具有近電氣距離多機(jī)和交/直流多通道等特點,機(jī)電耦合特性異常復(fù)雜,次同步振蕩(Subsynchronous Oscillation, SSO)問題凸顯,采用常規(guī)的單機(jī)無窮大簡化等值系統(tǒng)難以準(zhǔn)確揭示其次同步振蕩特性。另一方面,隨著柔性交流輸電系統(tǒng)(Flexible AC Transmission Systems, FACTS)的逐步推廣和應(yīng)用,以及我國西北地區(qū)風(fēng)電的大規(guī)模開發(fā)和并網(wǎng),我國電力系統(tǒng)的次同步振蕩問題更將呈現(xiàn)出新的特點。本論文結(jié)合上述工程背景,研究多機(jī)交直流聯(lián)合電力系統(tǒng)次同步振蕩分析的特征值和復(fù)轉(zhuǎn)矩系數(shù)分析方法,探索含F(xiàn)ACTS及風(fēng)電的大電源外送系統(tǒng)次同步振蕩特性。論文的主要工作和研究成果如下。 (1)研究了電力系統(tǒng)次同步振蕩特征值分析中網(wǎng)絡(luò)部分狀態(tài)空間的生成方法。針對具有非常態(tài)網(wǎng)絡(luò)(Improper Network)特點的輸電網(wǎng)狀態(tài)空間生成所面臨的獨(dú)立狀態(tài)變量選取等問題,歸納了輸電網(wǎng)絡(luò)狀態(tài)變量選取規(guī)律,定義了電容支路動態(tài)導(dǎo)納矩陣的概念,進(jìn)而采用支路追加的思想提出了一種建立電力系統(tǒng)網(wǎng)絡(luò)部分狀態(tài)空間模型的新方法；該方法可方便地根據(jù)網(wǎng)絡(luò)結(jié)構(gòu)確定網(wǎng)絡(luò)狀態(tài)變量,且算法易于實現(xiàn)；工程實際算例特征值分析和時域仿真表明了該方法的有效性。 (2)改進(jìn)了基于復(fù)頻域端口等效導(dǎo)納矩陣(Complex Frequency Domain Port-equivalence Conductance Matrix, CPCM)的復(fù)轉(zhuǎn)矩系數(shù)法并開發(fā)了相應(yīng)軟件。系統(tǒng)地研究了電力系統(tǒng)元件和網(wǎng)絡(luò)的復(fù)頻域建模方法,改進(jìn)了基于CPCM的復(fù)轉(zhuǎn)矩系數(shù)法中發(fā)電機(jī)和網(wǎng)絡(luò)復(fù)頻域模型的接口算法,從而使算法可有效地計及多機(jī)系統(tǒng)中機(jī)組軸系間的耦合作用,提高了電氣復(fù)轉(zhuǎn)矩系數(shù)計算的準(zhǔn)確性,并使算法具有分析含發(fā)電機(jī)轉(zhuǎn)速反饋控制的SSO阻尼裝置對機(jī)組電氣復(fù)轉(zhuǎn)矩系數(shù)影響的能力；工程實際算例特征值分析和時域仿真均驗證了改進(jìn)算法的有效性。所開發(fā)的分析軟件可為系統(tǒng)規(guī)劃／運(yùn)行中的次同步振蕩問題研究提供一種有效的分析手段。 (3)以我國某工程系統(tǒng)為原型系統(tǒng),采用改進(jìn)的基于CPCM的復(fù)轉(zhuǎn)矩系數(shù)法研究了含TCSC (Thyristor Controlled Series Capacitor)的交直流聯(lián)合電力系統(tǒng)的次同步振蕩特性,并對比分析了系統(tǒng)中串補(bǔ)線路分別采用TCSC和固定串聯(lián)電容補(bǔ)償時系統(tǒng)的次同步振蕩特性。分析表明有以下特點可供大電源外送工程規(guī)劃和運(yùn)行參考：經(jīng)交直流聯(lián)合通道外送的SSO風(fēng)險小于僅經(jīng)串聯(lián)電容補(bǔ)償外送的風(fēng)險,且在串聯(lián)電容補(bǔ)償輸電系統(tǒng)中推廣TCSC的使用可降低系統(tǒng)的SSO風(fēng)險。 (4)我國西北地區(qū)存在密集的大容量風(fēng)電和火電集中外送的需求,風(fēng)電—火電打捆集中外送系統(tǒng)的工程實現(xiàn)將成為必然。針對風(fēng)電—火電打捆經(jīng)串補(bǔ)外送系統(tǒng)的次同步相互作用(Subsynchronous Interaction, SSI)新問題,汽輪發(fā)電機(jī)組和風(fēng)電機(jī)組間SSI特性的相互影響研究表明風(fēng)電—火電打捆可對汽輪發(fā)電機(jī)組和風(fēng)電機(jī)組的SSI問題有一定改善作用,并進(jìn)一步探索了DFIG (Doubly Fed Induction Generator)附加控制綜合抑制系統(tǒng)中汽輪發(fā)電機(jī)組SSO和風(fēng)電機(jī)組SSI的方法和可行性。
[Abstract]:In order to improve the transmission capacity, the series capacitance compensation and high voltage direct current transmission technology are widely adopted in the large power supply base outgoing system. Channel and other characteristics, mechanical and electrical coupling characteristics are very complex, Subsynchronous Oscillation, SSO problems are highlighted, the use of conventional single machine infinity simplified system is difficult to accurately reveal the second synchronization oscillation characteristics. On the other hand, with the gradual extension of the flexible AC transmission system (Flexible AC Transmission Systems, FACTS) With the large-scale development and grid connection of wind power in the northwest of China, the sub synchronous oscillation of the power system in China will take on new characteristics. This paper combines the above engineering background to study the eigenvalues and the complex torque coefficient analysis method for the sub synchronous oscillation analysis of the multi machine AC and DC joint power system, and explore the FACTS and wind power. The main work and research results of the paper are as follows.
(1) the generation method of the network part state space in the eigenvalue analysis of the subsynchronous oscillation of the power system is studied. In view of the independent state variable selection for the state space generation of the transmission network with the characteristic of the Improper Network, the selection law of the state variable of the transmission network is summed up and the dynamic capacity branch path is defined. The concept of admittance matrix is introduced, and a new method of building a partial state space model of power system network is proposed by using the idea of branch addition. The method can easily determine the network state variables according to the network structure, and the algorithm is easy to be realized. The effectiveness of the method is demonstrated by the analysis of the eigenvalues and the time domain simulation in the practical engineering examples.
(2) the complex torque coefficient method based on the complex frequency domain port equivalent admittance matrix (Complex Frequency Domain Port-equivalence Conductance Matrix, CPCM) is improved and the corresponding software is developed. The complex frequency domain modeling method for power system components and networks is systematically studied, and the generator and network complex in the complex torque coefficient method based on CPCM are improved. The interface algorithm of the frequency domain model enables the algorithm to effectively calculate the coupling effect between the units in the multi machine system, improve the accuracy of the calculation of the electrical complex torque coefficient, and make the algorithm have the ability to analyze the influence of the SSO damping device with the generator speed feedback control on the electrical complex moment coefficient of the unit; the actual engineering example is special. Both eigenvalue analysis and time domain simulation verify the effectiveness of the improved algorithm. The developed analysis software can provide an effective method for the study of sub synchronous oscillation in system planning / operation.
(3) taking a engineering system in our country as a prototype system, a modified CPCM based complex torque coefficient method is used to study the sub synchronous oscillation characteristics of the AC / DC joint power system with TCSC (Thyristor Controlled Series Capacitor). The system is compared and analyzed in the system with TCSC and fixed series capacitor compensation in the system. The characteristics of synchronous oscillation show that the following characteristics can be used as reference for the project planning and operation of large power supply. The risk of SSO transmission through AC and DC joint channels is less than the risk of compensating external transmission only by series capacitance, and the use of TCSC in the series capacitor compensation transmission system can reduce the SSO risk of the system.
(4) there is a dense large capacity wind power and centralized outgoing demand in the northwest of China, and the implementation of wind power and thermal power bundling centralized outflow system will be inevitable. The new problem of Subsynchronous Interaction, SSI, steam turbine generator and wind turbine is a new problem for wind power and thermal power bundling. The study on the interaction of SSI characteristics between groups shows that wind power and thermal power bundling can improve the SSI problem of turbogenerator and wind turbine, and further explore the method and feasibility of DFIG (Doubly Fed Induction Generator) additional control integrated control system of SSO and wind turbine SSI.

【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TM712

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 畢天姝;孔永樂;肖仕武;張鵬;張濤;劉全;;大規(guī)模風(fēng)電外送中的次同步振蕩問題[J];電力科學(xué)與技術(shù)學(xué)報;2012年01期

2 汪寧渤;丁坤;陟晶;馬彥宏;王建東;;風(fēng)電火電打捆聯(lián)合外送是解決風(fēng)電市場瓶頸的有效途徑[J];電力技術(shù);2010年Z2期

3 何大愚;柔性交流輸電技術(shù)和用戶電力技術(shù)的新進(jìn)展[J];電力系統(tǒng)自動化;1999年06期

4 王仲鴻,沈斐,吳鐵錚;FACTS技術(shù)研究現(xiàn)狀及其在中國的應(yīng)用與發(fā)展[J];電力系統(tǒng)自動化;2000年23期

5 李立mg;洪潮;;貴廣二回直流輸電系統(tǒng)次同步振蕩問題分析[J];電力系統(tǒng)自動化;2007年07期

6 伍凌云;李興源;龔勛;楊煜;洪潮;徐大鵬;李偉;;基于模糊免疫方法的次同步阻尼控制器設(shè)計[J];電力系統(tǒng)自動化;2007年11期

7 謝小榮;楊庭志;姜齊榮;林驚濤;武云生;;采用SVC抑制次同步諧振的機(jī)理分析[J];電力系統(tǒng)自動化;2008年24期

8 顧威;李興源;王渝紅;穆子龍;魏巍;;UPFC對風(fēng)電場次同步諧振的抑制作用[J];電力系統(tǒng)自動化;2010年08期

9 汪寧渤;王建東;何世恩;;酒泉風(fēng)電跨區(qū)消納模式及其外送方案[J];電力系統(tǒng)自動化;2011年22期

10 吳俊勇,陳曉華,汪馥英,何仰贊,程時杰;復(fù)雜電力系統(tǒng)發(fā)電機(jī)軸系扭振特性的快速計算[J];電力系統(tǒng)自動化;1997年04期

，

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