Study On A New Double-Stroke Reciprocating Deflector Wave Energy Convertor

With the increasing scarcity of fossil energy,renewable energy has attracted more and more attention all over the world.The ocean holds an estimated 2 TW ocean energy resource worldwide,making the potential enormous to extract energy from ocean waves.Although researchers around the world have been discussing ways to access ocean energy since the late 18th century,researches in this area are still relatively immature compared to other renewable energy technologies.This paper proposes a high-efficiency two-stroke reciprocating yaw-type wave energy power generation device.The dynamic mathematical model of the power generation device is established and employed to carry out the simulation optimization analysis,the simulation comparison,and the simulation verification for the power generation device.The contents of each chapter of this thesis are described as follows:Based on the investigation and consultation to a large number of relevant documents at home and abroad,the background and research significance of wave energy power generation device research are discussed;the wave energy power generation device is classified and summarized;various research progress and important achievements of wave energy capture and conversion all over the world are introduced.Several key technical issues of the double-stroke yaw-type wave energy power generation device are described.This paper introduces the technical scheme of the two-stroke yaw-type wave energy power generation device to capture ocean energy,compares it to previous wave energy captures and conversion schemes;elaborates on the working principle of the mechanical rectifier in the wave energy power generation device.Aiming at different kinds of machines,design methods of the power converter and control algorithm of the optimal wave power output are proposed.The dynamic mathematical model of the double-stroke reciprocating yaw-type wave power generation device is established.The energy converter is the core component of the wave energy power generation device.In the first section,the energy converter is divided into three parts:ball screw pair,mechanical rectifier,and generator.Dynamic models are established respectively.In the second section,the force of ocean waves on the yaw of the double-stroke reciprocating yaw-type power generation device is obtained through the Amplitude-wave theory and the Morrison equation and is used to excite the dynamic model of the energy converter established in the first section.Using Matlab/Simulink and ADAMS,the system co-simulation analysis of the doublestroke reciprocating pendulum power generation device is carried out.The mathematical model described in Chapter 3 is established in Matlab/Simulink,and the parameters in the model are analyzed and optimized.The physical model of the one-way clutch is established in ADAMS,and its kinematics and dynamics are simulated and analyzed.The simulative and numerical results show the correctness and the validity of the established model.