摘要
热声发电系统具有热转换效率高、运行可靠、污染少等优点。若将直线发电机发出的电能直接存储到蓄电池中,只有高于其端电压时才会工作,转换效率较低。为了使蓄电池负载获得最大功率,从而提高热声发电系统的运行效率,本文采用buck-boost变换电路对发电机输出的电压进行变换。通过对其动态方程的分析,得出了断流模式下蓄电池负载的最大功率控制策略。仿真结果表明,与直接充电方式相比,所采用的控制策略使蓄电池负载获得的功率提高了一倍以上。
Thermoacoustic power generation system has the merits of high thermal conversion efficiency, reliable operation and low environmental pollution. However, if the battery is charged by the linear generator in the direct way, the system works only when the output voltage of the generator is higher than the terminal voltage of the battery, and the transfer efficiency is relatively low. Buck-boost converting circuit is used in this paper to transform the output voltage of the linear generator, in order to make the battery get the maximum power, and then to improve the efficiency of the thermoacoustic power generation system. The dynamic equations of the system are analyzed, and then the maximum power control strategy of the battery load is obtained. The simulation results show that with the proposed control strategy, the power received by battery is more than twice of the one with the traditional way.
出处
《电气技术》
2012年第11期1-5,共5页
Electrical Engineering
基金
国家自然科学基金资助项目(50977058)
