间歇性波浪能发电系统恒功率控制实验研究

为解决波浪能发电过程中把不稳定的波浪能转换为稳定的电能的问题,本文设计了一种间歇性波浪能液压蓄能发电系统,并且提出了基于实验测试的平稳发电实时控制策略。对负载对液压系统工作压力影响、液压马达压差与比例流量阀开口度的关系进行了理论分析。在理论的基础上,通过LabVIEW数据采集得出了压差、比例阀开口度、马达输入流量的实验数据,通过对实验分析,建立了保证流量稳定的比例阀开口度控制曲线。实验结果表明,该系统在蓄能器的稳压缓冲和控制系统的调节作用下,可以保证发电机功率和发电电压稳定,从而实现稳定发电的目的。

Experimental study on power stabilization control of intermittent wave energy generators

This paper presents a new intermittent wave energy generator (WEG) with a hydraulic energy storage accumulator that converts unstable wave energy into stable output power in electrical power generation, and describes its components and working principle along with a real-time control method for stabilizing the output power based on experimental test database. Theoretical models were constructed for the relationship of load versus working pressure and the relationship of hydraulic motor pressure drop versus opening ratio of the proportional flow valve. The latter relationship was verified by experimental data collected using LabVIEW, and a control curve of the opening ratio was used to stabilize the flow rate of hydraulic motor. Experimental results show that the output power of generators can be maintained stable within a certain range and the new WEG, when combined with hydraulic energy storage accumulator and real-time control based on experimental test database, is an effective device for generation of stable and smooth output power.