本文選題：統(tǒng)一潮流控制器 + 附加阻尼控制器��； 參考：《山東科技大學(xué)》2017年碩士論文

【摘要】：統(tǒng)一潮流控制器(Unified Power Flow Controller, UPFC)作為電力電子技術(shù)與自動(dòng)控制技術(shù)相融合的產(chǎn)物,依托其先進(jìn)的電網(wǎng)控制特性在電力系統(tǒng)中的應(yīng)用日益增多。本文針對(duì)UPFC用于抑制電力系統(tǒng)低頻振蕩的機(jī)理進(jìn)行了研究,設(shè)計(jì)了用于抑制電力系統(tǒng)低頻振蕩的UPFC主控制器和附加阻尼控制器。本文首先詳細(xì)分析了統(tǒng)一潮流控制器的基本結(jié)構(gòu)和工作原理,總結(jié)了 UPFC的運(yùn)行方式,建立了 UPFC的基頻動(dòng)態(tài)模型和高頻數(shù)學(xué)模型,探討了在未加入附加阻尼控制器狀態(tài)下統(tǒng)一潮流控制器對(duì)提高電力系統(tǒng)穩(wěn)定水平的作用。而后,基于UPFC的基頻動(dòng)態(tài)模型和高頻數(shù)學(xué)模型,分別設(shè)計(jì)了 UPFC的系統(tǒng)級(jí)控制器和裝置級(jí)控制器。UPFC的系統(tǒng)級(jí)控制器采用基于兩相旋轉(zhuǎn)坐標(biāo)系下的非線(xiàn)性解耦控制方案,該控制方案在UPFC的精確控制下具有快速跟蹤給定值的優(yōu)點(diǎn),且在dq坐標(biāo)下可以實(shí)現(xiàn)對(duì)有功和無(wú)功功率的獨(dú)立控制。同時(shí),本文采用了基于SPWM控制的UPFC開(kāi)關(guān)函數(shù)分析方法,分析了的UPFC裝置級(jí)控制器的工作原理和UPFC裝置級(jí)控制器的控制參數(shù)對(duì)電力系統(tǒng)穩(wěn)定性的影響。其次,為提高UPFC抑制電力系統(tǒng)低頻振蕩的效果,建立了裝有UPFC的電力系統(tǒng)Phillips-Heffron模型,并通過(guò)對(duì)該模型的分析,設(shè)計(jì)了以發(fā)電機(jī)軸的機(jī)械功率作為反饋信號(hào)的附加阻尼控制器。最后,借助MATLAB/Simulink平臺(tái),搭建了雙回線(xiàn)路中的系統(tǒng)主電路仿真模型、UPFC主控制器模型及附加阻尼控制器模型,并通過(guò)仿真驗(yàn)證了所設(shè)計(jì)的UPFC主控制器及附加阻尼控制器均具有抑制電力系統(tǒng)低頻振蕩的效果,電力系統(tǒng)在加入附加阻尼控制器后,系統(tǒng)的動(dòng)態(tài)響應(yīng)時(shí)間可進(jìn)一步縮短,并可以更快的恢復(fù)穩(wěn)定狀態(tài)。
[Abstract]:Unified Power Flow Controller (UPFC), as a product of the integration of power electronics and automatic control technology, is increasingly used in power system based on its advanced power network control characteristics. In this paper, the mechanism of UPFC used to suppress low frequency oscillation of power system is studied. The main controller of UPFC and the additional damping controller are designed to suppress the low frequency oscillation of power system. In this paper, the basic structure and working principle of the unified power flow controller are analyzed in detail, the operation mode of UPFC is summarized, and the fundamental frequency dynamic model and high frequency mathematical model of UPFC are established. The effect of unified power flow controller on the stability of power system without additional damping controller is discussed. Then, based on the fundamental frequency dynamic model and the high frequency mathematical model of UPFC, the system-level controller and the system-level controller of UPFC are designed respectively. The system level controller of UPFC adopts a nonlinear decoupling control scheme based on two-phase rotating coordinate system. This control scheme has the advantage of fast tracking the given value under the accurate control of UPFC, and can realize the independent control of active and reactive power in dq coordinates. At the same time, the UPFC switching function analysis method based on SPWM control is used to analyze the working principle of the UPFC device level controller and the influence of the control parameters of the UPFC device level controller on the power system stability. Secondly, in order to improve the effect of UPFC to suppress the low frequency oscillation of power system, the Phillips-Heffron model of power system with UPFC is established, and through the analysis of this model, the additional damping controller with mechanical power of generator shaft as feedback signal is designed. Finally, with the help of MATLAB/Simulink platform, the main circuit simulation model and the additional damping controller model of dual circuit are built. The simulation results show that both the UPFC main controller and the additional damping controller can suppress the low frequency oscillation of the power system. The dynamic response time of the power system can be further shortened when the additional damping controller is added to the power system. And can return to stable state more quickly.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM712

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本文編號(hào)：1812535