摘要
随着全球能源危机的日益加剧以及光伏并网发电系统成本的不断降低,人们对光伏并网发电系统的关注也越来越多。针对"光伏并网发电系统具有非线性,以及光伏阵列的输出电压一般较低"等问题,在光伏并网发电系统的模型设计时增加一级DC/DC变换器,以提高输出电压,利于后级DC/AC逆变器的控制。控制策略采用了模糊PID控制,并利用Matlab/Simulink对模糊PID算法和该模型进行了仿真。研究结果表明基于模糊PID控制以及增加一级DC/DC变换器的光伏并网发电系统的模型是可行的。
With the growing global energy crisis and the lower cost of photovoltaic power systems,more and more attention is paid on it.Aiming at the nonlinear of the PV grid-connected system,and the low value of output voltage,a new model was designed by adding a DC/DC converter to increase the input voltage value of DC/AC inverter,which is be neficial to control of sub sequent-stage DC/AC inverters.Fuzzy-PID control was used to control the DC/DC converter,Matlab/Simulink was used to simulate the model.This results indicate that the model based on the fuzzy-PID control and DC/DC converter is feasible.
出处
《机电工程》
CAS
2010年第9期104-107,共4页
Journal of Mechanical & Electrical Engineering
