| Summary: | 碩士 === 中原大學 === 電機工程研究所 === 86 === Voltage flickers resulting from arc furnaces in the steel plantsare shown to have a greater impact on the power quality. The investigation of the operation characteristics for the arc furnaceand the impact of the arc furnace on the system are therefore very important.First, this thesis discusses the phenomena of voltage flickers.Then different mathematical models of the arc furnace are examinedfor understanding the theoretic basis, mathematical methods and applicability. Because the problems of voltage flickers exist inthe power systems, many utilities build up their voltage flickerstandards which are described in this thesis. The standards of voltage flicker in the world are not the same; therefore, differentmethods are used to measure the voltage flicker. The 10Hz equivalent value is used for the voltage flicker standardin Taiwan. According to the definition of the 10Hz equivalent value, we propose a method to transfer voltage variation waveformto the 10Hz equivalent value. In this thesis, a method calledflicker power flow method for solving voltage flicker power flowis developed based on stochastic load flow theory and least squareanalysis. The flicker power flow method can obtain the voltageflicker of power systems quickly and exactly. The flicker powerflow method is verified through simulation and experimentation.
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