海流能发电系统的负载控制仿真研究

STUDY ON THE SIMULATION OF THE LOAD CONTROL FOR THE MARINE CURRENT ENERGY POWER SYSTEM

基于海流能发电系统最大功率跟踪控制理论,设计以二极管整流-斩波-逆变结构为主电气结构的小功率等级海流能发电系统。系统负载控制器输出PWM信号调节DC/DC变换器,即调节系统负载特性,使得叶轮转速跟踪最优转速,实现系统最大功率跟踪控制运行。在系统数学模型的基础上,搭建Matlab环境下的系统仿真模型并进行仿真分析,仿真结果显示,系统具有良好的动态特性,通过调节负载大小的方法,叶轮实际捕获功率可较好地跟踪理论最大功率,实现系统最大功率输出。

Based on the maximal power tracking has designed a small power scale marine current rectifier-chopper-inverter. The load controller re control energy gulates theory for marine current energy power system, this paper conversion system. The system adopts the structure that is the DC/DC convertor using PWM signal. Then the load characteristic of the system will be changed, and consequently the speed of the turbine track optimal speed, as well as the power captured by the turbine. Using the feedback linearization model, the simulation model is constructed and simulated. The simulation results reveal that the dynamic characteristic of the system has good performance under the control environment of the load controller. The power captured by the turbine track the maximal power by changing the load of the system.