本文選題：超低頻振蕩 + 小干擾穩(wěn)定分析��； 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：隨著水輪機(jī)調(diào)速系統(tǒng)的不斷發(fā)展,調(diào)速系統(tǒng)對(duì)電網(wǎng)低頻振蕩的影響越來(lái)越引起人們的關(guān)注。通過(guò)理論分析發(fā)現(xiàn),調(diào)速系統(tǒng)不僅會(huì)影響電網(wǎng)低頻振蕩阻尼特性,還會(huì)向電網(wǎng)注入比低頻振蕩頻率更低的超低頻振蕩模態(tài),它經(jīng)常在調(diào)速系統(tǒng)動(dòng)作時(shí)出現(xiàn),嚴(yán)重威脅著電網(wǎng)安全穩(wěn)定運(yùn)行。在實(shí)際系統(tǒng)中水輪機(jī)調(diào)速器的控制參數(shù),通常是通過(guò)階躍響應(yīng)、沖激響應(yīng)等實(shí)驗(yàn)手段,并結(jié)合曲線擬合等方法求得的,建模參數(shù)往往存在一些誤差,因此其參數(shù)存在不確定性。另一方面,水輪機(jī)調(diào)速系統(tǒng)是典型的非最小相位系統(tǒng),因此本論文中采用線性矩陣不等式方法設(shè)計(jì)魯棒控制器。本文中,主要對(duì)水輪機(jī)調(diào)速系統(tǒng)超低頻振蕩仿真分析和其控制器的設(shè)計(jì)進(jìn)行了研究。論文中,對(duì)小干擾穩(wěn)定性分析理論進(jìn)行簡(jiǎn)單闡述,主要介紹了小干擾穩(wěn)定分析的理論、方法以及步驟,分別對(duì)單機(jī)無(wú)窮大系統(tǒng)和多機(jī)系統(tǒng)進(jìn)行了分析,并且搭建了電力系統(tǒng)主要組成子模塊的數(shù)學(xué)模型。以7型水輪機(jī)調(diào)速系統(tǒng)為算例,通過(guò)轉(zhuǎn)矩分析理論,詳細(xì)分析了水輪機(jī)調(diào)速系統(tǒng)在系統(tǒng)發(fā)生低頻振蕩時(shí)對(duì)電力系統(tǒng)阻尼特性的影響,并在Matlab/Simulink軟件中,分別對(duì)7型水輪機(jī)調(diào)速系統(tǒng)、6型水輪機(jī)調(diào)速系統(tǒng)以及PID型水輪機(jī)調(diào)速系統(tǒng)進(jìn)行仿真驗(yàn)證,并對(duì)仿真結(jié)果進(jìn)行分析比較。通過(guò)對(duì)仿真結(jié)果分析,還驗(yàn)證了電力系統(tǒng)發(fā)生超低頻振蕩是由于多臺(tái)機(jī)組調(diào)速器參數(shù)的不合理(改變),并且它們之間相互作用,使得系統(tǒng)阻尼比嚴(yán)重下降而引起的,而僅僅一臺(tái)機(jī)調(diào)速器參數(shù)的改變并不能使系統(tǒng)發(fā)生超低頻振蕩。闡述了線性矩陣不等式的理論基礎(chǔ)及相關(guān)引理,針對(duì)典型的非最小相位系統(tǒng)水輪機(jī)調(diào)速系統(tǒng)設(shè)計(jì)魯棒控制器,增加系統(tǒng)的阻尼比,使系統(tǒng)的穩(wěn)定性能得以改善,同時(shí)系統(tǒng)擁有良好的動(dòng)態(tài)特性以及魯棒性能。
[Abstract]:With the development of hydraulic turbine speed regulation system, people pay more and more attention to the influence of speed regulation system on power grid low frequency oscillation. Through theoretical analysis, it is found that the speed regulation system will not only affect the damping characteristics of the low frequency oscillation of the power grid, but also inject the ultra-low frequency oscillation mode lower than the low frequency oscillation frequency into the power network. It is a serious threat to the safe and stable operation of power grid. In the practical system, the control parameters of hydraulic turbine governor are usually obtained by experimental means such as step response, impulse response and curve fitting. The modeling parameters often have some errors, so the parameters are uncertain. On the other hand, the hydraulic turbine speed regulation system is a typical non-minimum phase system, so the linear matrix inequality (LMI) method is used to design the robust controller in this paper. In this paper, the simulation analysis of ultra-low frequency oscillation and the design of its controller are studied. In this paper, the theory of small disturbance stability analysis is briefly expounded, the theory, method and steps of small disturbance stability analysis are introduced, and the single machine infinite bus system and multi machine system are analyzed respectively. The mathematical model of the main sub-modules of the power system is also built. Taking model 7 hydraulic turbine governing system as an example, through torque analysis theory, the influence of hydraulic turbine speed regulation system on the damping characteristics of power system when the low frequency oscillation occurs in the system is analyzed in detail, and in Matlab / Simulink software, The model 7 hydraulic turbine speed regulation system and the pid turbine speed governing system are simulated and verified, and the simulation results are analyzed and compared. Through the analysis of the simulation results, it is also proved that the ultra-low frequency oscillation in power system is caused by the unreasonable (changing) of the governor parameters of several units, and the interaction between them causes the system damping ratio to decrease seriously. But the change of the parameters of a single governor can not make the system very low frequency oscillation. The theoretical basis and related Lemma of linear matrix inequality (LMI) are described. A robust controller is designed for typical non-minimum phase hydraulic turbine governing system, which increases the damping ratio of the system and improves the stability of the system. At the same time, the system has good dynamic characteristics and robust performance.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM712

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 付超;柳勇軍;涂亮;李鵬;洪潮;李鵬;吳琛;徐敏;趙睿;;云南電網(wǎng)與南方電網(wǎng)主網(wǎng)異步聯(lián)網(wǎng)系統(tǒng)試驗(yàn)分析[J];南方電網(wǎng)技術(shù);2016年07期

2 張建新;劉春曉;陳亦平;張勇;黃河;付超;李鵬;;異步聯(lián)網(wǎng)方式下云南電網(wǎng)超低頻振蕩的抑制措施與試驗(yàn)[J];南方電網(wǎng)技術(shù);2016年07期

3 劉春曉;張俊峰;陳亦平;張建新;徐敏;王官宏;;異步聯(lián)網(wǎng)方式下云南電網(wǎng)超低頻振蕩的機(jī)理分析與仿真[J];南方電網(wǎng)技術(shù);2016年07期

4 劉子全;姚偉;文勁宇;李勇;王春明;;調(diào)速系統(tǒng)頻率模態(tài)對(duì)電網(wǎng)低頻振蕩的影響[J];中國(guó)電機(jī)工程學(xué)報(bào);2016年11期

5 王茂海;孫昊;;強(qiáng)迫功率振蕩源的在線定位分析技術(shù)[J];中國(guó)電機(jī)工程學(xué)報(bào);2014年34期

6 翁洪杰;徐衍會(huì);王珍珍;;汽輪機(jī)調(diào)速系統(tǒng)對(duì)電網(wǎng)低頻振蕩的影響[J];南方電網(wǎng)技術(shù);2014年03期

7 張俊峰;李鵬;郭琦;;PSS2A模型的負(fù)阻尼案例分析及檢測(cè)方法[J];電力系統(tǒng)自動(dòng)化;2014年02期

8 劉春曉;張俊峰;李鵬;黃河;李智歡;;調(diào)速系統(tǒng)對(duì)南方電網(wǎng)動(dòng)態(tài)穩(wěn)定性的影響研究[J];中國(guó)電機(jī)工程學(xué)報(bào);2013年S1期

9 徐衍會(huì);王珍珍;翁洪杰;;一次調(diào)頻試驗(yàn)引發(fā)低頻振蕩實(shí)例及機(jī)理分析[J];電力系統(tǒng)自動(dòng)化;2013年23期

10 李文鋒;李瑩;周孝信;郭劍波;卜廣全;陶向宇;王官宏;;基于WAMS的電力系統(tǒng)功率振蕩分析與振蕩源定位(2)力矩分解法[J];中國(guó)電機(jī)工程學(xué)報(bào);2013年25期

相關(guān)會(huì)議論文 前1條

1 唐戢群;毛成;;水電機(jī)組孤網(wǎng)運(yùn)行問(wèn)題的研究與探討[A];2008年抗冰保電技術(shù)論壇論文集（一）[C];2008年

相關(guān)碩士學(xué)位論文 前4條

1 王小龍;計(jì)及調(diào)速系統(tǒng)作用的水電廠孤網(wǎng)運(yùn)行超低頻振蕩研究[D];昆明理工大學(xué);2015年

2 和鵬;電力系統(tǒng)低頻振蕩分析與控制策略研究[D];西南交通大學(xué);2013年

3 周密;南方電網(wǎng)低頻振蕩仿真研究[D];華北電力大學(xué)（北京）;2008年

4 朱煜鈺;基于LMI的非最小相位系統(tǒng)魯棒控制器設(shè)計(jì)[D];鄭州大學(xué);2007年

，

本文編號(hào)：2070284