摘要
最大功率点跟踪(MPPT)技术较大程度上影响着光伏逆变系统的效率,传统的定步长扰动观测法存在MPPT精度和跟踪速度之间的矛盾。文中提出了一种变步长的扰动观测法,并对该算法进行改进。在Simulink中搭建仿真模型,其中MPPT通过改变Boost变换器中开关管的占空比来实现。仿真结果表明该改进算法有效地提高了MPPT精度和跟踪速度。最后,在3 kW样机上采用该改进算法进行实验,验证了该算法的有效性。
Maximum power point tracking （MPPT） technology largely affects the efficiency of the photovoltaic inverter system, and the traditional fixed-step perturbation and observation method exists the contradiction between the MPPT accuracy and tracking speed. A variable-step perturbation and observation method was proposed, and the algorithm was improved. The simulation model set up in the Simulink and the MPt~ was realized by changing the duty cycle of switching tube in Boost converter. The simulation results show that the improved algorithm effectively improves the MPPT accuracy and tracking speed. At last, the improved algorithm is applied on the 3kw prototype and the experimental results verify the effectiveness of the algorithm.
出处
《轻工机械》
CAS
2013年第5期55-58,共4页
Light Industry Machinery
