2 kW波力发电液压动力输出系统设计和仿真分析

动力输出（PTO）系统是波浪能转换装置（WEC）的重要组成部分。提出一种新型波力发电液压PTO系统，该系统在典型液压PTO系统的基础上增设了调速阀和溢流阀，用于调节工作流量和输出功率。由此设计了2 kW波力发电液压PTO系统，并在AMESim中仿真分析系统可行性。结果表明：设计波况下，该PTO系统能够连续、稳定地输出2 kW电功率，蓄能器稳压稳流作用明显，补油箱能及时补油并保持油压流量稳定，单向阀可实现“整流”；大波况下，通过调速阀节流，溢流阀排泄多余流量，该PTO系统能够维持2 kW功率输出。仿真表明，该波力发电液压PTO系统可行。

Design and simulation of 2 kW hydraulic power take-off system for wave power generation

The power take-off (PTO) system is an important element of a wave energy converter (WEC). This paper presents a novel hydraulic PTO system for wave power generation that is equipped with a speed-regulating valve and relief valve to regulate its working flow and power output. Then, a 2 kW hydraulic PTO system of this type is designed and numerically simulated in AMESim to verify its feasibility. Simulation results show that under the design wave condition, this system produces a continuous, steady power output of 2 kW and 50 Hz through stabilizing the output voltage and current effectively by the accumulator, stabilizing the oil pressure and flow by timely oil supply from the oil tank, and imposing flow "rectification" by the check valves. Under large wave conditions, it can also keep a 2 kW steady power output, with the throttling of its speed-regulating valve and the overflowing of its relief valve. Thus, our hydraulic PTO system for wave power generation is technically feasible.