| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 101 === Since the high population density in Taiwan makes installation of power facilities and substation more difficult, the problems of a power system become more complicated. In order to improve the quality of a power transmission system, the voltage of a regional power transmission network must be regulated appropriately to reduce damages of facilities and transmission loss. To this purpose, the first study investigates the operation rules of commonly used voltage control devices in Taipower, several references about the optimal algorithms, and the specifications of operation requirement of Taipower. Then, the PSS/E and Matlab are used to analyze the power system characteristics in Hualien-Taitung Region. This thesis applies and compares the Hybrid Differential Evolution (HDE), Particle Swarm Optimization with Linear Decreasing Inertia Weight (PSO-LDIW), Constriction Particle Swarm Optimization (CPSO), and Particle Swarm Optimization with Nonlinear Inertia Weight with Dynamical Adaption (PSO-NIW) to optimal dispatch and control of the voltage and reactive power problems. The purpose is to reduce the magnitude of over voltage bus and transmission line loss in the Hualien-Taitung Region. The results show that PSO-NIW has the best effects. The solution is close to the practical discrete dispatch, so that the PSO-NIW is suitable for the optimal problems in the thesis. The result can be as a reference for the system dispatcher.
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