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Circuit Design And Power Control For Wave Power Generation

Posted on:2019-07-17Degree:MasterType:Thesis
Country:ChinaCandidate:H YangFull Text:PDF
GTID:2530305900484684Subject:Mechanical engineering
Abstract/Summary:PDF Full Text Request
Nowadays,theenergy crisis has become increasingly serious.Fossil fuels have produced a lot of pollution after combustion,and these traditional energy reserves are limited.With the development of society,the demand for energy is also increasing,forcing countries to shift their horizons to new energy industries.Our country has vast sea area with long coastlines and abundant ocean energy resources.Wave energy,as a kind of clean energy,has its own advantages of being renewable and non-polluting.It has been vigorously developed in recent years and has become an important part of China’s new energy system.If it can be rationally exploited and utilized,it will effectively alleviate the current energy problem,and it will be a trend of technological development.Various countries have conducted a series of studies on the rational use of wave energy.The utilization efficiency of wave energy has always been a difficult and important point in the study.This paper takes the maximization of turbine energy capture as a goal,and sums up the current development of relatively mature photovoltaic power generation technology,starting from the wave’s own characteristics to study the maximum energy capture method of wave energy power generation system,and verify the feasibility and effectiveness of the program through simulation anddesign a remote data monitoring system.Thesis mainly includes the following contents:1)On the basis of analyzing a large number of relevant literatures in our country and abroad,the latest research progress and development prospects of wave energy power generation devices are introduced.The control methods used in power generation systems are described,and the research significance and research content of this topic are proposed.2)The basic principle and structural characteristics of the wave energy power generation device are studied.The design of the turbine blade is analyzed.The drive modeand the selection of the generator are discussed,providing a theoretical basis for the overall design of the device.3)Determine the overall design of the wave energy generation device and the topological structure of the power generation system,including uncontrollable rectifier bridge,DC-DC conversion,inverter and other parts,analyze the power conversion control principle of the generator in detail,and establish the generator mathematical model.4)Analyze and compare the maximum power tracking control strategy of solar power generation.Comparing previous research results,based on the characteristics of the self-generating device,through theoretical analysis and program design,due to the complexity of the actual marine environment,the actual flow velocity of the water is not stable,and the power generation The output power of the machine is alternating current with unsteady frequency and varying amplitude.This paper introduces and analyzes several common tracking methods.Based on the summarization of the traditional hill-climbing search method and the three-point comparison method,the climbing search method is improved,the method of determining the duty ratio may be misjudged,and the variable duty cycle is more accurately trackedto achieve the maximum energy capture effect of the impeller.5)An experimental platform based on the wave energy device model of Matlab/Simulink was built.Through the load adjustment,the feasibility of the MPPT algorithm was verified,and the maximum power point was tracked in time,which effectively improved the turbine’s energy efficiency.Did marine test for Remote monitoring system.
Keywords/Search Tags:Wave energy, Direct-drive, Powerquality, Maximum energy capture
PDF Full Text Request
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