碩士 / 國立臺北科技大學 / 電機工程系研究所 / 97 / Because the fossil energy reduced in recently years, and the Kyoto protocol had performed following. For reducing the usage of carbons and saving crude resource, finding a cheaper and alternative energy is the important issue for worldwide. Since the technologies of wind power increases, there have more than 2000MW installed capacity about wind energy in western coastal of Taiwan and in Peng-Hu. In addition, the peak load in Peng-Hu power system increased about 7% annually, and the thermal plants and wind generations nowadays that can supply the load up to 2013. For the reasons mentioned above, constructing offshore wind farm in Peng-Hu is necessary. As a result, it is valuable to investigate the safety and stability of the power system and offshore wind farms in Peng-Hu, respectively.
Matlab/Simulink package is used for simulation in this thesis. In our simulations, the predictive load amount and the power factor are assumed as constant and supply-demand balance of Peng-Hu power system in 2019 to investigate the effect of difference transmission ways that with high voltage direct current (HVDC) cable or with high voltage alternating current (HVAC) cable. Further, the impact investigated of asymmetric single line-to-ground fault and symmetric three-phase short-circuit fault occur onshore that concern to wind farm and power system in Peng-Hu in this thesis.
From the results of simulations, if using HVAC transmission, the overvoltage occurs on the load side of substation and Husi secondary substation must be improved that in order to conform the Taipower operating rules of voltage which should be setup between 0.97pu~1.03pu, so it should construct reactance in proper location. On the other hand, when using HVDC transmission, on three phase short-circuit fault case, the result indicates fundamental wave of converter will change over the Taipower operating rules of voltage, due to the low voltage side of Chikan substation will build in the future. So, the fault currents can be restrained by the changing of the control signals and modulation indices. Therefore, the transmission line and the protection device work safely and the power system operation security is efficient. These simulation results can be the reference that constructing the wind farm in Peng-Hu in the future.
| Identifer | oai:union.ndltd.org:TW/097TIT05442094 |
| Date | January 2009 |
| Creators | Kuo-Ming Ho, 何國名 |
| Contributors | Ching-Yin Lee, 李清吟 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 100 |
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