Loukriz Abdelhamid, Haddadi Mourad, Messalti Sabir
Department of Electrical Engineering, High School Polytechnic ENP, Algeria.
Department of Electrical Engineering, High School Polytechnic ENP, Algeria.
ISA Trans. 2016 May;62:30-8. doi: 10.1016/j.isatra.2015.08.006. Epub 2015 Aug 31.
Improvement of the efficiency of photovoltaic system based on new maximum power point tracking (MPPT) algorithms is the most promising solution due to its low cost and its easy implementation without equipment updating. Many MPPT methods with fixed step size have been developed. However, when atmospheric conditions change rapidly , the performance of conventional algorithms is reduced. In this paper, a new variable step size Incremental Conductance IC MPPT algorithm has been proposed. Modeling and simulation of different operational conditions of conventional Incremental Conductance IC and proposed methods are presented. The proposed method was developed and tested successfully on a photovoltaic system based on Flyback converter and control circuit using dsPIC30F4011. Both, simulation and experimental design are provided in several aspects. A comparative study between the proposed variable step size and fixed step size IC MPPT method under similar operating conditions is presented. The obtained results demonstrate the efficiency of the proposed MPPT algorithm in terms of speed in MPP tracking and accuracy.
基于新型最大功率点跟踪（MPPT）算法提高光伏系统效率是最具前景的解决方案，因为其成本低且易于实施，无需设备更新。已开发出许多具有固定步长的MPPT方法。然而，当大气条件迅速变化时，传统算法的性能会降低。本文提出了一种新的变步长增量电导IC MPPT算法。给出了传统增量电导IC和所提方法在不同运行条件下的建模与仿真。所提方法基于反激式变换器和使用dsPIC30F4011的控制电路在光伏系统上成功开发并测试。从多个方面提供了仿真和实验设计。给出了在相似运行条件下所提变步长和固定步长IC MPPT方法的对比研究。所得结果证明了所提MPPT算法在MPP跟踪速度和精度方面的效率。
