一种光伏发电系统的双扰动MPPT方法研究

RESEARCH ON DOUBLE DISTURBANCES MPPT STRATEGY FOR PV POWER GENERATION SYSTEM

针对一种开关电容（SC）的电路结构,在此基础上提出一种双扰动观察（P＆O）算法,形成双向互补控制的最大功率点跟踪（MPPT）,通过不同收敛域的双扰动同时提高静态稳定特性和动态响应特性,其互补控制实现死区的自返回,利用Matlab仿真软件构建基于开关电容变换器的MPPT算法模型,模拟任意参数的光伏阵列,动态跟踪光照强度和环境温度的变化,通过光伏发电平台对该开关电容变换器的MPPT控制策略进行实验验证。仿真和实验结果表明：该方法能在一定范围内对太阳电池输出功率进行跟踪调节,可快速稳定地启动并减少误判,有效降低系统输出功率在最大功率点处的振荡现象,减小光伏组件的能量损耗。

Based on circuit structure for a switched capacitor（SC）,a dual perturbation observation（P＆O）algorithm was proposed to form the bidirectional complementary MPPT control strategy,the static stability and dynamic response characteristics were simultaneously improved through dual-perturbations in different convergence domains,its complementary control achieved dead-zone self-return.The MATLAB simulation software was used to construct MPPT algorithm model on the basis of switched capacitor converter,simulate photovoltaic array with any parameters and dynamically track the changes of light intensity and ambient temperature.The experimental verification of the MPPT control strategy of the switched capacitor converter was carried out through PV power generation platform.The simulation and experiment results show that the method can track and regulate the output power of photovoltaic cells within a certain range,can start quickly and steadily and reduce misjudgement,effectively reduce the oscillation phenomenon of output power in the maximum power point,decrease the power consumption of PV module.