碩士 / 國立成功大學 / 電機工程學系碩博士班 / 98 / This thesis presents the design and implementation of a tidal current power conversion system. The proposed system employs tidal turbine emulator and power converter to construct a stand-alone power generation system.
At first, the tidal turbine characteristic is obtained from the field test. Following that, the mathematical model and turbine’s characteristics are programmed by MATLAB/Simulink. The programmed file is used to realize the torque-speed control of the three-phase servo induction motor as a prime force to drive the permanent magnet synchronous generator. Because of the slow tidal speed, both output voltage and frequency from the generator are very low. A high step-up dc/dc power converter must be used to raise the dc-link voltage to a desired level. To supply general AC loads, a single-phase full-bridge inverter is used to convert the dc-link voltage to a single-phase AC source at 110V_rms, 60Hz.
To effectively manage the available tidal energy, a bi-directional dc/dc power converter with maximum power point tracking (MPPT) function and the battery bank are designed to store the excessive tidal energy. According to the power balancing conditions, the battery bank can be charged or discharged to regulate the power flow and stabilize the output power for demands.
The field implementation of the proposed system has been realized and tested under various operating scenarios. Experimental results have verified the effectiveness of the proposed power conversion system in managing the power flow for the tidal turbine generation.
| Identifer | oai:union.ndltd.org:TW/098NCKU5442171 |
| Date | January 2010 |
| Creators | Yu-FuChou, 周育甫 |
| Contributors | Le-Ren Chang-Chien, 張簡樂仁 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 108 |
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