NOVATEUR PUBLICATIONS INTERNATIONAL JOURNAL OF INNOVATIONS IN ENGINEERING RESEARCH AND TECHNOLOGY [IJIERT] ISSN: 2394-3696 Website: ijiert.org VOLUME 9, ISSUE 1, Jan. -2022 28 | Page IMPROVED PERTURB & OBSERVE MPPT METHOD USING PI CONTROLLER FOR PV SYSTEM BASED ON REAL ENVIRONMENTAL AND CLIMATIC CONDITIONS Ambe Harrison Department of Electrical and Electronics Engineering, College of Technology, University of Buea, Cameroon ambeharrison2000@yahoo.com Jean de Dieu Nguimfack Ndongmo 2 Department of Electrical and Power Engineering, Higher Technical Teacher Training College (HTTTC), University of Bamenda, Cameroon nguimfack.jean@uniba.cm Eustace Mbaka Nfah Department of Electrical and Electronics Engineering, National Higher Polytechnic Institute Bamenda, Cameroon emnfah@yahoo.com Olome Baudouin Ekute Department of Electrical and Electronics Engineering, Faculty of Engineering and Technology, University of Buea, Cameroon olomeb@gmail.com ABSTRACT This paper covers the implementation of one of the most popular MPPT algorithm, Perturb & Observe Algorithm based on Proportional Integral (PI) Control for a typical PV system under real environmental and climatic condition. The environmental parameters were collected from an experimental setup made of Solar Meter and Temperature sensor to record Solar Irradiation and temperature respectively on a 50Watts Solar panel. The Experimental setup was mounted on the Campus of the University of Buea, Cameroon and data collected for one day in November which falls in the dry season at the site. The Real environmental parameters were injected into MATLAB/ Simulink were the system was investigated to show the enhancement of the tracking performance of the MPPT system coupled with PI controller. Keywords: MPPT, Perturb &Observe, PI controller, Boost converter, PV system INTRODUCTION The effect of environmental changes couple with the high demand for energy stimulates urgent concern to embrace other alternative sources of energy. To fulfill the plea of energy, renewable energy becomes of utmost importance since it is the best alternative among other resources. In the context of renewable energy the solar energy through Photovoltaic system is one of the most reliable and mature sources of energy. The PV energy is green, and environmentally pleasant. The solar panel based on Photovoltaic principle converts solar energy to Electrical energy. The PV module is a nonlinear device whose output powers randomly changing environmental parameters, most importantly Solar Irradiation and Temperature [14, 15]. The main pitfall with the PV system is the problem of low efficiency of the modules [11]. Also, another major pitfall occurs as a result of non-perfect coupling of the Load and the PV generator [11]. Despite the nonlinear behaviour of the