Determining the Parameters of Photovoltaic Modules by a Modified Differential Evolution Algorithm
Zou De-xuan① Gao Li-qun② Duan Na①
①(School of Electrical Engineering and Automation, Jiangsu Normal University, Xuzhou 221116, China) ②(School of Information Science and Engineering, Northeastern University, Shenyang 110004, China)
Abstract：The Rs&Rp model is an efficient method which analyzes the characteristic of PhotoVoltaic (PV) device, and it gives consideration to both computational complexity and accuracy. In Rs&Rp model, five parameters should be determined, and they are photo-current IPV, diode saturation current Io, diode ideality constant a, series resistance Rs and parallel resistance Rp, respectively. In order to find accurate parameters of PV models, a Modified Differential Evolution (MDE) algorithm is proposed in this paper. The MDE uses different scale factors in mutation, which is beneficial to improving the diversity of population. In addition, it also adopts different crossover rates in crossover operation, which enables the proposed algorithm itself to get rid of local optimums. Experimental results show that the MDE can find accurate parameters of Rs&Rp model within a short period of time, which enables the experimental datasets to be well matched by the I-V curves based on the MDE and the Rs&Rp model.
2014, Vol. 36 
