碩士 / 國立成功大學 / 電機工程學系碩博士班 / 98 / This thesis employs a permanent-magnet generator driven by a horizontal-axis tidal-current turbine to constitute a tidal-current power generation system, and an equivalent aggregated tidal-current farm is established by using the equivalent aggregation method. Both steady-state and dynamic analyzed results of power flow and stability of the hybrid renewable resources including an equivalent aggregated offshore wind farm and a tidal-current farm with and without a flywheel energy-storage system (FESS) are presented. The q-d axis equivalent-circuit model is utilized to establish the models for the tidal-current farm, the offshore wind farm, and the FESS under three-phase balanced loading conditions. A proportional-integral-derivative (PID) type damping controller using the voltage magnitude of the common AC bus as a feedback signal is designed for the FESS by pole-assignment approach based on modal control theory. Steady-state characteristics of this studied system under different values of wind speed, tidal-current speed, length of transmission line, etc. are examined. Dynamic simulations of the studied system subject to long-term time-varying tidal-current speeds, short-term time-varying wind speeds, torque disturbances, and a three-phase fault are also carried out. It can be concluded from the simulation results that the proposed FESS joined with the designed PID damping controller can effectively control the power flow and improve the stability of the studied system under various disturbance conditions.
| Identifer | oai:union.ndltd.org:TW/098NCKU5442181 |
| Date | January 2010 |
| Creators | Chao-NanLi, 黎昭男 |
| Contributors | Li Wang, 王醴 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 210 |
Page generated in 0.0024 seconds