超级电容器储能的光伏系统自适应控制研究

Research on Adaptive Control of PV System for Super Capacitor Energy Storage

针对现有光伏系统稳定性与自调整能力不足的实际情况,提出了一种基于超级电容器储能、自适应控制并网策略的光伏系统。通过分析超级电容器储能原理并对电路进行优化设计,提出了一种新型双Boost模式电路,增大了电路的跨负载电压偏移量,取得了更理想的储能效果。优化了自校正PI控制器,阐述了自校正PI控制的设计和基本原理。新控制器参数控制简便,并且在保持PI控制的基础上,增强了系统对环境的适应能力。通过Matlab波形分析表明,该方案很好地提高了光伏系统的稳定性和鲁棒性。提出的自适应PI控制优化方法可以在弥补传统控制方式不足的基础上,通过进一步研究来提高光伏系统的整体性能,也可为系统中其他环节的优化控制提供研究方向。

Aiming at the actual situation of existing PV systems lacking stability and self-adjustment ability,a photovoltaic system based on super capacitor energy storage and adaptive control grid connected strategy is proposed. By analyzing the principle of super capacitor energy storage and optimizing the design of the circuitry,a new type of double Boost mode circuit is proposed,which increases the cross load voltage offset of the circuit and achieves better energy storage effect. The self-correction PI controller is optimized,and the design and basic principle of the self-correction PI control are described. The control of the parameters of this new controller is simple,and the system adaptability to the environment is enhanced on the basis of maintaining the advantages of PI control. Through the Matlab waveform analysis,it is found that the scheme can well improve the stability and robustness of the PV system. The proposed adaptive PI control optimization method can improve the overall performance of the PV system by continuing research on the basis of making up insufficiency of traditional control mode,and also provide the research direction for the optimization control of the other aspects in the system.