本文選題：次同步振蕩動態(tài)抑制器　切入點(diǎn)：新能源電力系統(tǒng)　出處：《華北電力大學(xué)(北京)》2017年博士論文　論文類型：學(xué)位論文

【摘要】：隨著風(fēng)力發(fā)電等新能源的快速增長,大功率電力電子技術(shù)的廣泛應(yīng)用,以復(fù)雜交直流系統(tǒng)為組成架構(gòu)的新能源電力系統(tǒng)逐漸形成。新能源電力系統(tǒng)的多源多變換特性使得次同步振蕩新問題不斷凸顯。為了解決新能源電力系統(tǒng)中存在的次同步振蕩新問題,本文基于電壓源換流器(Voltage Souce Converter,VSC)技術(shù),提出了次同步振蕩動態(tài)抑制器(Subsynchronous Oscillation-Dynamic Suppressor,SSO-DS)的新型抑制方法,開展了如下研究:論文首先分析了我國電力系統(tǒng)中近年來出現(xiàn)的次同步振蕩若干新問題的產(chǎn)生機(jī)理。針對大型火電機(jī)群經(jīng)高壓直流輸電(High Voltage Direct Current Transmission,HVDC)與交流混合串聯(lián)補(bǔ)償線路送出系統(tǒng)的頻繁次同步振蕩(Frequent Subsynchronous Oscillation,FSSO)問題,提出了系統(tǒng)阻尼特性和基于強(qiáng)迫振蕩原理的軸系扭振響應(yīng)特性的綜合分析方法,結(jié)果表明,在系統(tǒng)弱阻尼條件下,強(qiáng)制激勵與系統(tǒng)自由響應(yīng)的共同作用,是導(dǎo)致頻繁次同步振蕩出現(xiàn)的根本原因;針對雙饋風(fēng)電場經(jīng)串補(bǔ)送出的次同步控制互作用(Subsynchronous Control Interaction,SSCI)問題,基于單機(jī)無窮大系統(tǒng),采用特征值法分析了SSCI的產(chǎn)生機(jī)理,指出轉(zhuǎn)子電阻和轉(zhuǎn)子變流器電流內(nèi)環(huán)在次同步頻率下的負(fù)電阻效應(yīng)以及變流器有功功率的次同步調(diào)制作用是導(dǎo)致系統(tǒng)負(fù)阻尼的根本原因;分析了雙饋風(fēng)電場經(jīng)弱交流系統(tǒng)并網(wǎng)情形下雙饋感應(yīng)發(fā)電機(jī)(Doubly Fed Induction Generator,DFIG)與靜止同步補(bǔ)償器(Static Synchronous Compensators,STATCOM)的SSCI風(fēng)險(xiǎn),結(jié)果表明弱交流系統(tǒng)中電壓的次同步擾動分量有可能感應(yīng)到STATCOM控制器中,在STATCOM控制環(huán)節(jié)作用下形成不穩(wěn)定的閉環(huán),導(dǎo)致SSCI的發(fā)生。上述機(jī)理分析結(jié)果不僅揭示了次同步振蕩新問題的產(chǎn)生機(jī)理,而且為次同步振蕩動態(tài)抑制器的阻尼控制器設(shè)計(jì)奠定了基礎(chǔ)。分析了SSO-DS的基本原理與運(yùn)行特性。針對大型火電機(jī)組軸系次同步扭振問題,研究了SSO-DS的阻尼電流調(diào)制策略。在已有雙頻調(diào)制策略的基礎(chǔ)上,提出了只發(fā)次同步電流或超同步電流的單頻調(diào)制策略,并對其關(guān)鍵參數(shù)設(shè)計(jì)進(jìn)行了分析;對具有不同分流特性的系統(tǒng),提出了SSO-DS阻尼電流調(diào)制策略的優(yōu)化設(shè)計(jì)方法�；赑SCAD/EMTDC的時(shí)域仿真平臺,對不同的阻尼電流調(diào)制策略進(jìn)行了對比分析,結(jié)果表明了SSO-DS阻尼控制策略設(shè)計(jì)方法的有效性。針對雙饋風(fēng)電場經(jīng)串補(bǔ)送出系統(tǒng)中SSCI發(fā)生頻率范圍寬的特性,以及傳統(tǒng)抑制方法控制輸入信號提取困難,魯棒性差的不足,研究了相應(yīng)的SSO-DS阻尼控制策略�；诹魯�(shù)分析方法,考慮不同串補(bǔ)度和風(fēng)速,確定了次同步阻尼控制器(Subsynchronous Damping Contoller,SDC)的最優(yōu)控制輸入信號及SDC接入VSC控制器的位置(d軸或q軸);基于根軌跡分析確定了次同步振蕩模態(tài)正阻尼的SDC增益范圍;最后,針對SDC有可能引起超同步模態(tài)失穩(wěn)的問題,提出了一種改進(jìn)的設(shè)計(jì)方案,通過加入帶阻濾波器來消除超同步頻率分量的影響。采用時(shí)域仿真對控制策略和控制參數(shù)設(shè)計(jì)的有效性進(jìn)行了驗(yàn)證,結(jié)果表明所提出的SSO-DS阻尼控制策略能夠有效解決風(fēng)電場中的次同步振蕩問題。將研發(fā)的10kV/20MVA SSO-DS裝置應(yīng)用于呼貝電廠�；诒疚奶岢龅淖枘犭娏髡{(diào)制方法,設(shè)計(jì)了其控制策略。采用實(shí)時(shí)數(shù)字-物理閉環(huán)仿真研究了其阻尼特性與最優(yōu)參數(shù)�，F(xiàn)場試驗(yàn)和工程應(yīng)用結(jié)果表明,SSO-DS成功解決了困擾呼貝電廠多年的FSSO,同時(shí)在大擾動下能夠明顯提高發(fā)電機(jī)模態(tài)收斂速度,從而驗(yàn)證了SSO-DS的有效性。
[Abstract]:With the rapid growth of new energy sources such as wind power, wide application of high power electronic technology, with complicated AC / DC system for the new energy power system structure gradually formed the new energy power system. Multi multi transform characteristics make SSO new problems continue to highlight. In order to solve the existing new energy power system in time a new synchronous oscillation problem, based on voltage source converter (Voltage Souce Converter VSC) technology, the subsynchronous oscillation suppressor (Subsynchronous Oscillation-Dynamic Suppressor, dynamic SSO-DS) the new type suppression method is carried out as follows: firstly, analysis of the mechanism of China's power system in recent years is the emergence of subsynchronous oscillation some new problems. For large fire by HVDC motor group (High Voltage Direct Current Transmission, HVDC) and AC hybrid series compensation Frequent subsynchronous oscillation compensation line system (Frequent Subsynchronous sent Oscillation, FSSO), the damping characteristic of the system and comprehensive analysis method, the characteristics of torsional vibration of the forced oscillation principle based on response results show that in the system with weak damping conditions, strong interaction and incentive system for free response, is the root cause frequent subsynchronous oscillations occur; for doubly fed wind power by the series compensation transmission sub synchronous control interaction (Subsynchronous Control Interaction, SSCI), a single machine infinite bus system based on using the eigenvalues of SSCI generation mechanism analysis, pointed out that the negative resistance effect of rotor resistance and rotor current in the subsynchronous frequency converter the active power converter and sub synchronous modulation system is the fundamental reason for negative damping; analysis of doubly fed wind power system and the weak AC Net under the condition of doubly fed induction generator (Doubly Fed Induction Generator, DFIG) and static synchronous compensator (Static Synchronous Compensators, STATCOM) SSCI risk, results show that the voltage weak AC system subsynchronous disturbance component may be induced to STATCOM controller, to form a closed loop instability in STATCOM control under the action of lead the occurrence of SSCI. The mechanism of the analysis results not only reveal the mechanism of time synchronous oscillation problems, but also lays a foundation for the design of damping controller subsynchronous oscillation dynamic suppressor. Analysis of the basic principle and operation characteristics of SSO-DS. According to the large thermal power unit shaft torsional fatigue problem of damping current modulation strategy SSO-DS. Based on the existing dual frequency modulation strategy, proposed single frequency modulation strategy only time synchronous current or super synchronous current, and the key The design parameters are analyzed; the system has different division characteristics, put forward the optimum design method of SSO-DS damping current modulation strategy. The time domain simulation platform based on PSCAD/EMTDC, the damping current different modulation strategies are analyzed, the results show the effectiveness of SSO-DS damping control strategy. The design method for DFIG wind farm the series compensation SSCI transmission system in a wide range of frequency characteristics, and the traditional method to suppress the control input signal is difficult to extract the robust, short, research on SSO-DS damping control strategy. The corresponding residue analysis method based on the consideration of different series compensation degree and wind speed, the subsynchronous damping controller (Subsynchronous Damping Contoller. SDC) the optimal control input signal and SDC VSC access controller position (D or q axis); based on the root locus analysis to determine the subsynchronous oscillation modal damping The SDC gain range; finally, the SDC may cause the instability of the super synchronous mode, proposes an improved design scheme, by adding a bandstop filter to eliminate the influence of super synchronous frequency component. The time-domain simulation of control strategy and control parameters of the effectiveness of the design is verified, the results show that SSO-DS the control strategy can effectively solve the damping of subsynchronous oscillations in wind farm proposed. The research and development of 10kV/20MVA SSO-DS device used in power plant. Call Bei damping current modulation method is proposed in this paper based on the design of its control strategy was studied. The damping properties and optimal parameters by the simulation of real time digital physical field results in closed loop. Experiment and application shows that SSO-DS successfully solved the problem of Hu Bei power plant of FSSO for many years, while in large disturbance can significantly improve the convergence speed of the generator mode, in order to verify The effectiveness of SSO-DS.

【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2017
【分類號】：TM712

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳國平;李明節(jié);許濤;劉明松;;關(guān)于新能源發(fā)展的技術(shù)瓶頸研究[J];中國電機(jī)工程學(xué)報(bào);2017年01期

2 陳武暉;宿端鵬;汪旎;孫欣;于焰均;;雙饋風(fēng)電場感應(yīng)發(fā)電機(jī)效應(yīng)的風(fēng)險(xiǎn)區(qū)域變化機(jī)理[J];中國電機(jī)工程學(xué)報(bào);2016年20期

3 謝小榮;劉華坤;賀靜波;張傳宇;喬元;;直驅(qū)風(fēng)機(jī)風(fēng)電場與交流電網(wǎng)相互作用引發(fā)次同步振蕩的機(jī)理與特性分析[J];中國電機(jī)工程學(xué)報(bào);2016年09期

4 黃耀;王西田;陳昆明;黃永民;;雙饋風(fēng)電場次同步相互作用的機(jī)理仿真驗(yàn)證與實(shí)用抑制策略[J];電網(wǎng)技術(shù);2016年08期

5 呂敬;董鵬;施剛;蔡旭;黎小林;;大型雙饋風(fēng)電場經(jīng)MMC-HVDC并網(wǎng)的次同步振蕩及其抑制[J];中國電機(jī)工程學(xué)報(bào);2015年19期

6 肖湘寧;;新一代電網(wǎng)中多源多變換復(fù)雜交直流系統(tǒng)的基礎(chǔ)問題[J];電工技術(shù)學(xué)報(bào);2015年15期

7 董曉亮;謝小榮;李江;韓英鐸;;大型風(fēng)電場中不同位置的風(fēng)機(jī)對次同步諧振特性影響程度的比較分析[J];中國電機(jī)工程學(xué)報(bào);2015年20期

8 陸晶晶;肖湘寧;張劍;羅超;;次同步振蕩動態(tài)穩(wěn)定器抑制弱阻尼次同步振蕩的機(jī)理與實(shí)驗(yàn)[J];電力系統(tǒng)自動化;2015年04期

9 董曉亮;謝小榮;楊煜;韓英鐸;;雙饋風(fēng)機(jī)串補(bǔ)輸電系統(tǒng)次同步諧振影響因素及穩(wěn)定區(qū)域分析[J];電網(wǎng)技術(shù);2015年01期

10 王亮;謝小榮;姜齊榮;劉輝;董曉亮;李雨;;大規(guī)模雙饋風(fēng)電場次同步諧振的分析與抑制[J];電力系統(tǒng)自動化;2014年22期

相關(guān)博士學(xué)位論文 前2條

1 張劍;間歇式次同步振蕩及次同步控制互作用問題研究[D];華北電力大學(xué);2014年

2 周長春;高壓直流輸電系統(tǒng)次同步振蕩阻尼特性研究[D];浙江大學(xué);2004年

相關(guān)碩士學(xué)位論文 前1條

1 鄭蕤;帶串聯(lián)補(bǔ)償?shù)慕恢绷鞑⒘邢到y(tǒng)次同步振蕩特性研究[D];華北電力大學(xué)（北京）;2011年

，

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