Study On The Wireless Data Acquisition System And Dynamic And Static Properties For The Waves Power Generation Simulation Device

At present, the global energy shortage is worsening and the greenhouse effect is intensifying. Therefore it is of great significance to look for clean, cheap and renewable energy sources. Among various new energies today, the ocean energy, with its significant advantages and great value, has received extensive attention both at home and abroad. Using the wave energy to generate electricity is one of the most important ways to utilize the ocean energy. To study the wave power generation has deep and extensive practical significance. The study of " floating hydraulic wave power generation simulator" relies on the State Oceanic Administration’s renewable energy special fund project "The middle test of120kW floating hydraulic power station"(Project Number:GHME2010ZC01). This thesis is done to provide technical references and practical theories to the overall design of engineering prototype of the project. According the demand to design the actual engineering prototype, this thesis has been written to do the research work of this topic.At first, this thesis reviews the research status and development tendency of wave power generations and the research status of domestic wave experiment devices both at home and abroad. Then, introduce the application status and development tendency of wireless communication technologies. Design the simulator for the floating hydraulic wave power generation based on the principle of the engineering prototype for the project. The parameters of the hydraulic wave simulation system and hydraulic power generation system are calculated depending on the analysis of working conditions of the engineering prototype. Then, set up the hydraulic system to simulate wave and the hydraulic system to generate electricity.Secondly, the hardware composition and control principle of the hydraulic servo control system to simulate waves are studied in this article. Using the discipline theory of control engineering and control of fluid power, establish the mathematical model of valve-controlled cylinder for the hydraulic system to simulate waves. Based on this, the transfer function of the hydraulic system to simulate waves is obtained. Through the calculation of relevant parameters, the mathematical model of hydraulic system to simulate waves is achieved. The bode figure of the open-loop transfer function of the hydraulic system to simulate waves is achieved by using the MATLAB to analyze the system stability. Establish the PID control model of the hydraulic system to simulate waves by the Simulink software. Analyze the static characteristic of the system through the simulation study and the response analysis of the step signal, square signal and sinusoidal signal for the system. It shows that:after the PID control was added, the system gets faster response speed and higher stability. The vibrations and shocks reduce drastically at the same time. The combination properties of the system get obvious improvements.Thirdly, using the hydraulic simulation software AMESim which is widely used in the field of hydraulic, this thesis establishes the AMESim simulation model of floating hydraulic wave power generation simulator device to analyze its dynamic performances. Set parameters of the hydraulic components and run the simulation. Study the effects of the accumulator and the load to response performance and generating performance. The result shows that it is significant for improving the power generation efficiency of the system and optimizing the power generation quality to select suitable accumulators and loads. Analyse the response characteristics of the device to simulate waves through experiments. Compared with the results of the simulation, verify the correctness and reasonableness of the results of the simulation and optimization.The result is of great significance to the optimal design of the wave power generation simulator device and the engineering prototype.At last, this thesis talks about how to effectively collect data of wave power generation. Then, study the application of the wireless data transformation technology in the data acquisition of the wave power generation technology. A kind of wireless power acquisition systems based on the GPRS networks is developed in this thesis to collect datas cheaply and conveniently. It can not only achieve the wireless acquisition of the electric parameters in the unattended conditions, but also have advantages of the simple structures, high degree of automation, low cost, good stability and so on. The cable data acquisition is developed to perfect the data acquisition system of wave power generation device. Verify the practical performance of the wave power wireless data acquisition system through experiments.At the same time, study the impact of the load on the efficiency of system power generation and quality of power generation by experimental data acquisition. The study showed that:Increasing the system load properly is helpful to improve the power generation efficiency of the system, stable power generation voltage and get more excellent quality.