【摘要】：在我國的西北地區(qū),隨著風(fēng)電和光伏等清潔能源開發(fā)規(guī)模的擴(kuò)大,多個(gè)大容量跨區(qū)特高壓直流工程陸續(xù)投產(chǎn),西北電網(wǎng)穩(wěn)定特性正在發(fā)生深刻變化,局部弱送端的網(wǎng)架特征日益凸顯。同時(shí)由于我國能源資源和能源需求逆向分布的客觀現(xiàn)實(shí),風(fēng)光火三種能源均存在大規(guī)模、遠(yuǎn)距離輸送至東部和中部負(fù)荷中心的客觀需要。對(duì)于弱送端風(fēng)光火打捆交直流外送系統(tǒng),由于系統(tǒng)各模塊的交互影響,使得系統(tǒng)的穩(wěn)定性分析變得更加的復(fù)雜。對(duì)此,本文圍繞弱送端風(fēng)光火打捆交直流外送系統(tǒng)小干擾功角穩(wěn)定性展開了研究。首先本文建立雙饋感應(yīng)發(fā)電機(jī),光伏發(fā)電站和直流輸電系統(tǒng)的動(dòng)態(tài)簡(jiǎn)化模型,設(shè)計(jì)了各動(dòng)態(tài)模型的控制策略,根據(jù)所建立的動(dòng)態(tài)模型推導(dǎo)了各模塊的線性化模型,并根據(jù)李雅普諾夫線性化方法,建立了風(fēng)光火打捆交直流外送全系統(tǒng)的線性化模型。其次本文介紹了系統(tǒng)狀態(tài)矩陣的特征分析方法,以此為理論依據(jù),在仿真系統(tǒng)中探究了影響系統(tǒng)小干擾功角穩(wěn)定性的四個(gè)因素,包括送端系統(tǒng)各電源之間的電氣距離、交直流輸電線的長(zhǎng)度、交直流傳輸容量的比例和風(fēng)光火各電源的并網(wǎng)容量,并分別分析了這四個(gè)因素對(duì)系統(tǒng)小干擾功角穩(wěn)定性的影響。隨后,為改善風(fēng)光火打捆交直流外送系統(tǒng)的阻尼,提出在雙饋風(fēng)機(jī)有功控制環(huán)附加PSS,并通過魚群算法設(shè)計(jì)PSS參數(shù),證明其能提高系統(tǒng)阻尼;提出在光伏電廠DC/AC換流器有功控制環(huán)附加PSS,并通過魚群算法設(shè)計(jì)PSS參數(shù),證明其能提高系統(tǒng)阻尼;提出在直流整流側(cè)定電流控制環(huán)附加PSS,并通過魚群算法設(shè)計(jì)PSS參數(shù),證明其有效性。最后為避免多臺(tái)PSS相互之間的不利影響,采用魚群算法對(duì)多臺(tái)PSS的參數(shù)進(jìn)行協(xié)調(diào)設(shè)計(jì),盡可能的提高系統(tǒng)阻尼。
[Abstract]:In northwest China, with the expansion of the scale of clean energy development, such as wind power and photovoltaic, a number of large-capacity trans-area UHVDC projects have been put into production one after another, and the stability characteristics of the Northwest Power Grid are undergoing profound changes. The characteristic of the local weak terminal is becoming more and more prominent. At the same time, due to the objective reality of reverse distribution of energy resources and energy demand in China, there is an objective need for large-scale transportation of all three kinds of energy sources to the eastern and central load centers. The stability analysis of the system becomes more complex because of the interaction of each module of the system. In this paper, the stability of the small disturbance angle of the AC / DC outgoing transmission system is studied. Firstly, the dynamic simplified model of doubly-fed induction generator, photovoltaic power station and direct current transmission system is established, and the control strategy of each dynamic model is designed. According to the established dynamic model, the linearization model of each module is derived. Based on the Lyapunov linearization method, the linearization model of the whole AC / DC system is established. Secondly, this paper introduces the characteristic analysis method of system state matrix, based on which, four factors which affect the stability of power angle of the system with small interference are explored in the simulation system, including the electrical distance between the power sources of the terminal system. The length of AC / DC transmission line, the ratio of AC / DC transmission capacity and the grid-connected capacity of each power source are analyzed, and the influence of these four factors on the stability of the system with small interference angle is analyzed. Then, in order to improve the damping of AC / DC transmission system with wind and fire bundles, it is proposed to add PSSs to the active power control ring of doubly-fed fan, and the PSS parameters are designed by the fish swarm algorithm, which proves that the damping of the system can be improved. The active power control loop of DC/AC converter in photovoltaic power plant is put forward, and the PSS parameter is designed by fish swarm algorithm, which proves that it can improve the system damping, and the fixed current control loop on DC rectifier side is added to the control loop, and the PSS parameter is designed by fish swarm algorithm. Prove its validity. Finally, in order to avoid the adverse effects of multiple PSS, fish swarm algorithm is used to coordinate the design of the parameters of multiple PSS to improve the damping of the system as much as possible.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【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 呂清潔;徐政;董桓鋒;李暉;肖晉宇;;非并聯(lián)運(yùn)行交直流系統(tǒng)直流調(diào)制原理及附加控制器設(shè)計(jì)[J];電網(wǎng)技術(shù);2016年02期

2 趙祥;張師;周毅博;孟祥輝;于昊;王鶴螢;;風(fēng)火打捆交直流混聯(lián)送端系統(tǒng)暫態(tài)穩(wěn)定性分析[J];智能電網(wǎng);2015年07期

3 賈俊川;趙兵;羅煦之;董衛(wèi)國;劉文亮;;青藏直流投運(yùn)后藏中電網(wǎng)穩(wěn)定特性研究[J];電力系統(tǒng)保護(hù)與控制;2014年06期

4 趙睿;李興源;劉天琪;王渝紅;楊毅強(qiáng);李寬;;抑制次同步和低頻振蕩的多通道直流附加阻尼控制器設(shè)計(jì)[J];電力自動(dòng)化設(shè)備;2014年03期

5 郭小江;趙麗莉;湯奕;申洪;;風(fēng)火打捆交直流外送系統(tǒng)功角暫態(tài)穩(wěn)定研究[J];中國電機(jī)工程學(xué)報(bào);2013年22期

6 劉楊;周明;向萌;張紫凡;;大規(guī)模風(fēng)電經(jīng)直流外送的區(qū)域輸電能力計(jì)算[J];電網(wǎng)與清潔能源;2013年02期

7 陳煒;艾欣;吳濤;劉輝;;光伏并網(wǎng)發(fā)電系統(tǒng)對(duì)電網(wǎng)的影響研究綜述[J];電力自動(dòng)化設(shè)備;2013年02期

8 郭東杰;王靈梅;韓西貴;陳遠(yuǎn);;基于PSS和SSSC的風(fēng)火打捆輸電系統(tǒng)暫態(tài)穩(wěn)定性研究[J];電力系統(tǒng)保護(hù)與控制;2012年19期

9 郭小江;馬世英;申洪;丁劍;;大規(guī)模風(fēng)電直流外送方案與系統(tǒng)穩(wěn)定控制策略[J];電力系統(tǒng)自動(dòng)化;2012年15期

10 黃怡;王智冬;劉建琴;張琳;李雋;;特高壓直流輸送風(fēng)電的經(jīng)濟(jì)性分析[J];電力建設(shè);2011年05期

相關(guān)博士學(xué)位論文 前3條

1 朱藝穎;大規(guī)模風(fēng)電直流外送系統(tǒng)的仿真與協(xié)調(diào)控制策略研究[D];華北電力大學(xué);2014年

2 邢潔;運(yùn)行參數(shù)變化對(duì)電力系統(tǒng)小干擾穩(wěn)定性的影響[D];上海交通大學(xué);2010年

3 李曉磊;一種新型的智能優(yōu)化方法-人工魚群算法[D];浙江大學(xué);2003年

相關(guān)碩士學(xué)位論文 前1條

1 宋婧;我國風(fēng)力資源分布及風(fēng)電規(guī)劃研究[D];華北電力大學(xué);2013年

，

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