| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 102 === The main purpose of this thesis is to design an LED streetlight simulation system based on wind-solar hybrid and smart grid. The Matlab is used to evaluate the economic benefits. The interface is designed by using GUI (Graphical User Interface) in Matlab, so that users can develop the system more easily.
The smart streetlight based on wind-solar hybrid and smart grid can deliver power while sustaining self-sufficiency. When the system generates too much energy, it would send the extra power to the power grid. On the other hand, when the system is in insufficient low energy, it could acquire the additional energy from the power grid to keep the system operate continuously. The streetlight simulation system includes wind-turbine model, photovoltaics model, storage battery model, controller, streetlight load and smart grid. By choosing a location and constructing a database of the local meteorological data, for instance, the wind speed, irradiation, temperature, etc., the simulation system is able to evaluate the annual load curve and calculate the electricity that is sent to and from the power grid. Finally, by using the electricity data from the simulation, the economic benefits can be evaluated through four economic evaluation indexes and the boundary condition of cost will be given. Through these steps, a systematic method can be established to evaluate whether the LED streetlight system based on wind-solar hybrid and smart grid can be efficiently installed. Because the system simulates in discontinuous time, it can’t perform the situation of transient state; however, it is valuable in steady state evaluation. Once the electricity company provides low voltage power transmission service in the future, the feasibility of the proposed system installed is valuable and can be adopted immediately.
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