廣域電力系統穩定器設計

Design of Wide-Area Power System Stabilizers

劉人福(Ren-Fu Liou)

指導教授 ： 朱家齊

國立清華大學/電機資訊學院/電機工程學系/碩士(2011年)

https://doi.org/10.6843/NTHU.2011.00578

摘要

為了抑制低頻振盪，傳統的電力系統穩定器僅取用本機信號，因此只能抑制本地振盪，無法有效提升系統區域間的阻尼。近年來，由於廣域量測系統的發展，使發電機組間的迴授控制得以實現。廣域電力系統穩定器的使用可有效抑制區域間的振盪並改善系統阻尼。當本地及廣域阻尼控制器在改善欠阻尼模式的同時也可能導致其他模式之阻尼惡化。為了防止系統的阻尼惡化，本論文對所有阻尼控制器之參數進行協調最佳化設計。
首先，本論文根據本機參與因子來配置本地電力系統穩定器，然後利用粒子群最佳化演算法協調所有電力系統穩定器參數。第二，本論文根據本機及他機參與因子來配置本地及廣域電力系統穩定器，然後利用粒子群最佳化演算法協調所有電力系統穩定器參數。第三，本論文根據留數及相對增益矩陣分析來配置本地電力系統穩定器，然後利用粒子群最佳化演算法協調所有電力系統穩定器參數。第四，本論文根據留數及相對增益矩陣分析及他機參與因子來配置本地及廣域電力系統穩定器，然後利用粒子群最佳化演算法協調所有電力系統穩定器參數。
由於廣域阻尼控制器存在時滯現象，在此使用培德近似方法來表示時滯，並以粒子群最佳化演算法協調時滯廣域阻尼控制器之參數，使系統所有阻尼控制器具有良好之抗時滯能力。

關鍵字

電力系統穩定器 ； 參與因子 ； 留數 ； 相對增益矩陣 ； 粒子群最佳化演算法 ； 時滯 ； 培德近似方法 ； 廣域量測系統

並列摘要

There are mainly two kinds of control technology, local and wide-area, for the damping control in power system. For depressing the low frequency oscillation, the traditional power system stabilizers often utilize the local unit signal that only suppress the local oscillation. Such a system can not promote the regional damping among the power systems. The development of wide-area measuring system in these years has efficiently suppressed the regional oscillation and improved the system damping. However, that may also deteriorate the damping in other modes when the local and wide-area damping controllers are improving under-damping of the power system. This thesis proposes the coordinated optimum design of the control parameters in damping controllers to promote the control efficiency and to prevent the damping of system from deteriorating worse.
In this thesis, we propose a working flow for disposition of stabilizers and the optimization of its parameters. We dispose the local power system stabilizers by the local participation factors at first. The particle swarm optimization (PSO) was proposed to coordinate the control parameters of all the controllers. Next, the local and wide-area stabilizers are disposed in accordance with the local and global participation factors. The parameters of all stabilizers are coordinated and optimized by PSO as well. Thirdly, the local stabilizers are disposed by the residue and the relative gain matrix analysis accompanied with the optimum parameters by PSO again. At last, the disposition of local and wide-area stabilizers are arranged by the residue, relative gain matrix analysis, and the global participation factors. The parameters are also optimized by PSO.
The result of this thesis shows that there exists the time delay phenomenon in wide-area damping controllers by using Pade approximation method to express time delay. The proposed working flow for the power system reveals that the wide-area damping controllers can possess good anti-time-delay ability by the optimum parameters from PSO.

並列關鍵字

power system stabilizer ； participation factor ； residue ； relative gain matrix ； particle swarm optimization ； time delay ； Pade approximation method ； wide-area measurement system

參考文獻

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