开关磁阻风力发电系统输出电压脉动抑制研究

由于风能的波动性、间歇性和不规则性，其输出量受自然资源的属性(如风速)影响很大.为提高风力发电系统的电能质量，依据开关磁阻发电机双凸极结构特点和磁阻最小工作原理，结合小功率变风速发电系统实际工况，选用自励模式，设计SRG变速恒压风力发电系统.根据SRG周期性分时实现励磁和发电的工作特点，分析输出电压脉动原因，对输出电压进行闭环控制；并优化输出电容滤波器，有效抑制输出电压脉动.MATLAB的仿真实验表明：合理选择电压反馈调节器类型及参数实现输出电压闭环控制，综合输出电容滤波器优化控制，开关磁阻风力发电系统可以很好地实现变速输出，有效解决低风速发电问题，增加SRG风电系统的供电可靠性，提高智能电网中分布式新能源发电系统的电能质量.

Research of Inhibition for Output Voltage Ripple in SRG Wind Power Generation System

As the volatility,intermittent and irregular natures of wind power,the output voltage of SRG is influenced greatly by the properties of natural resources ( such as wind speed ).To improve power quality of wind power generation system,the doubly-salient structural characteristics of SRG is analysised.According to its unique principle of least reluctance,and combining of practical requirements in low-power variable-speed constant-voltage wind power generation system,a small and high energy efficient model is selected.In self-excited mode,SRG wind power generation system is designed.Rest on the work characteristics of time-sharing alternative controlled periodically in the excited period and the power generation period,the causes of output voltage ripple can be got,firstly the voltage feedback regulator is rational designed; secondly,the output voltage closed-loop control of SRG is achieved.Lastly,the capacitor filters is optimized.MATLAB Simulation resultsshow that,after the type and parameters of voltage feedback controller have been choiced reasonablly,based on the closed-loop control of output voltage,the capacitor filters have optimized,in different wind-driven,a stable output voltage of SRG wind power generation system can be got.The problem of low wind speed power generation can be solved effectively,and the supply reliability of SRG wind power system can be increased.Therefore,the power quality of micro-grid in distributed new energy power generation systems can be improved.