基于改进型光伏系统MPPT控制策略的研究

Research on improved photovoltaic MPPT control strategy

针对传统MPPT算法跟踪速度和稳态精度难以同时兼顾问题,提出了一种新型MPPT控制策略;具体方法是根据光伏组件的参考光照强度、参考温度和输出电流大小,利用相应公式关系对实时光伏组件的输出功率进行修正,并求出其控制调节占空比D,来达到对最大功率点精确追踪的目的。Simulink仿真结果表明,该控制算法相对传统算法实现简单,动态响应跟踪速度较快,达到稳态后的震荡小。实现了跟踪速度和稳态精度的兼顾,有效提高了能量利用效率,具有良好的推广价值。

Aiming at the problem that the tracking speed and steady-state accuracy of the traditional MPPT algorithm are difficult to balance at the same time, a new MPPT control strategy is proposed here, the specific method is based on the reference light intensity, reference temperature and output current of the photovoltaic module, and the corresponding formula is used to compare the real-time photovoltaic, the output power of the component is corrected, and its control adjustment duty cycle D is obtained to achieve the purpose of accurately tracking the maximum power point. Simulink simulation results show that the control algorithm is simpler than the traditional algorithm, the dynamic response tracking speed is faster, and the shock after reaching the steady state is small. It realizes the balance of tracking speed and steady-state accuracy, effectively improves energy utilization efficiency, and has good promotion value.