| Currently, with the change of international energy environment, the traditional energy sources like coal, oil and natural gas are using up. This brings not only great challenges to people’s life but also serious environmental problems. As a result, great attentions have been paid to energy problems which lead to a series of new energy exploration reforms. The development and utilization of new energy can not only slow down the energy crisis but also bring protection to people’s production and life and contribute to the improving of environment.Based on this background, the study of ocean energy is increasing. Ocean energy is a clean energy with great species and abundant reserves. Currently, lots countries are studying the conversion of ocean energy. Wave energy is one species of ocean energy. It is the most widely distributed without geographical restrictions. Wave energy has been developed to be used to generate electricity. However, due to the complexity of ocean environment, wave height changes rapidly, so how to take advantage of ocean wave to generate power durable and efficiently has become a problem. In addition, how to use scientific means to predict the information condition of wave power generator has also become the focus of the study.In the year of2010, the State Oceanic Administration start the special fund project of renewable energy (project ID:GHME2010ZC01)"120kW floating type hydraulic wave power station pilot" project. According to the requirement, Shandong University designed a set of wave power generator independently. Using ANSYS finite element software, this article analyzed the static, dynamic response of the designed wave power generator. The specific work are as follows:Describe the working principle of the device and the ocean conditions briefly and overview the wave theory. After studying the relevant conditions, this article draws a three-dimensional model of the wave power generator’s component using Solidworks. We get the three-dimensional model of the generator after assembling.Analyzed the force conditions of wave power generator under such ocean conditions and established the finite element model of the component. Use ANSYS software to analyze the force to get the intensity and stiffness result of the set. Analyzed the modal of the set to predict the natural frequency and compared it to the frequency of the wave forces. Avoid the occurrence of resonance by improving the device in order to generate power in a stable environment. The device is mainly forced by wave shock, this include two situations:one is that the wave force affects the device regularly and the other one is that the wave force affects the device instantaneously under large waves. Based on the two situations, analyzed the harmonic response and transient kinetic. The result shows that this device can withstand the wave force of force12wind. This device was tested in September of2012. Results showed that the device was well designed and generated power under force8wind, which also verified the correctness of the theory.Modeled the hydraulic system of the device and deduced the transfer function. Used MATLAB/Simulink software to analyze the stability and conducted PID control analysis. Results showed the following features was not very satisfactory so we re-simulated the system joining fuzzy self-tuning PID control which leaded to a better performance. |
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