Design of a P-&-O algorithm based MPPT charge controller for a stand-alone 200W PV system  

作　　者：Salman Salman Xin AI Zhouyang WU 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China

出　　处：《Protection and Control of Modern Power Systems》2018年第1期268-275,共8页现代电力系统保护与控制（英文）

基　　金：2016 national key R&D program of China to support low-carbon Winter Olympics of integrated smart grid demonstration project(2016YFB0900501).

摘　　要：Solar cells convert sun light into electricity,but have the major drawbacks of high initial cost,low photo-conversion efficiency and intermittency.The current-voltage characteristics of the solar cells depend on solar insolation level and temperature,which lead to the variation of the maximum power point(MPP).Herein,to improve photovoltaic(PV)system efficiency,and increase the lifetime of the battery,a microcontroller-based battery charge controller with maximum power point tracker(MPPT)is designed for harvesting the maximum power available from the PV system under given insolation and temperature conditions.Among different MPPT techniques,perturb and observe(P&O)technique gives excellent results and thus is used.This work involves the design of MPPT charge controller using DC/DC buck converter and microcontroller.A prototype MPPT charge controller is tested with a 200 W PV panel and lead acid battery.The results show that the designed MPPT controller improves the efficiency of the PV panel when compared to conventional charge controllers.

关 键 词：PV system Maximum power point tracker(MPPT) Perturb and observe(P&O)technique Charge controller MICROCONTROLLER 

分 类 号：TM6[电气工程—电力系统及自动化]