Motion analysis and power output optimization design of wave energy device

Abstract

Wave energy is an essential marine renewable energy. Improving the energy conversion efficiency of wave energy devices is the key aspect of wave energy utilization research. This paper deals with the movement status of the wave energy device and its power optimization. Depending on Newton’s second law, the second-order ordinary differential equation model is established for the float and oscillator respectively. According to whether the damping coefficient is constant, the pending method coefficient is utilized to solve the general second-order solution ordinary differential equation model, and the drooping displacement and velocity graphs under different damping coefficients are obtained. The analysis shows that the oscillating wave energy device improved by the second-order ordinary differential equation model could become stable within a very short time. The motion displacement and velocity of the wave energy device at five random moments were taken to check the accuracy of the model, and the results show that the model has an excellent promoting effect on the motion state of the wave energy device at sea and reduces the depletion of the device in terms of accuracy of motion displacement and velocity.