电测与仪表2017，Vol.54Issue(23)：10-16,23,8.
基于二次插值的光伏MPPT改进算法研究
Research on photovoltaic MPPT improved algorithm based on lagrange quadratic interpolation method
摘要
Abstract
In order to improve the tracking speed and reduce the steady surge of photovoltaic MPPT,a MPPT algorithm is introduced in this paper,which is based on Lagrange quadratic interpolation and conductance increment method.The output characteristics of photovoltaic cell and the tracking principle of fixed-step conductance increment method are firstly analyzed.Based on this,the fixed-step conductance increment method is optimized by using Lagrange quadratic interpolation,and the influence of selected step on this method is revealed.To eliminate the influence,a MPPT algorithm combined Lagrange quadratic interpolation with variable-step conductance increment method is proposed.Simulation results show that the improved MPPT algorithm can respond to the external environment change rapidly and steadily and resolve the contradiction of tracking speed and steady surge effectively during the process of MPPT.关键词
最大功率跟踪/二次插值/变步长/电导增量法Key words
maximum power point tracking(MPPT)/Lagrange quadratic interpolation/variable-step/conductance increment method分类
信息技术与安全科学引用本文复制引用
辛小南,李航宇,程志平,武杰..基于二次插值的光伏MPPT改进算法研究[J].电测与仪表,2017,54(23):10-16,23,8.基金项目
河南省高等学校重点科研项目(16A120018) （16A120018）
河南省科技厅科技攻关项目(152102210242) （152102210242）
河南省高等学校重点科研项目(17A120014) （17A120014）
