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》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)與自動控制技術(shù)相融合的產(chǎn)物,依托其先進的電網(wǎng)控制特性在電力系統(tǒng)中的應用日益增多。本文針對UPFC用于抑制電力系統(tǒng)低頻振蕩的機理進行了研究,設計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的運行方式,建立了 UPFC的基頻動態(tài)模型和高頻數(shù)學模型,探討了在未加入附加阻尼控制器狀態(tài)下統(tǒng)一潮流控制器對提高電力系統(tǒng)穩(wěn)定水平的作用。而后,基于UPFC的基頻動態(tài)模型和高頻數(shù)學模型,分別設計了 UPFC的系統(tǒng)級控制器和裝置級控制器。UPFC的系統(tǒng)級控制器采用基于兩相旋轉(zhuǎn)坐標系下的非線性解耦控制方案,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,且在dq坐標下可以實現(xiàn)對有功和無功功率的獨立控制。同時,本文采用了基于SPWM控制的UPFC開關(guān)函數(shù)分析方法,分析了的UPFC裝置級控制器的工作原理和UPFC裝置級控制器的控制參數(shù)對電力系統(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,并通過對該模型的分析,設計了以發(fā)電機軸的機械功率作為反饋信號的附加阻尼控制器。最后,借助MATLAB/Simulink平臺,搭建了雙回線路中的系統(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,并通過仿真驗證了所設計的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)的動態(tài)響應時間可進一步縮短,并可以更快的恢復穩(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.
【學位授予單位】：山東科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM712

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本文編號：1812535