www.iaset.us editor@iaset.us CONTROL TECHNIQUE FOR PEMFC BASED ENERGY SYSTEM Mrs. M. Malathi 1 & Dr. Usha Surendra 2 1 Assistant Professor, Department of Electrical and Electronics Engineering, NIE Institute of Technology, Mysuru, Karnataka, India 2 Professor, Department of Electrical and Electronics Engineering, Christ (Deemed to be University), Bengaluru, Karnataka, India ABSTRACT Fuel cells play an important role in renewable energy systems. It is the main power source for portable and standalone applications. Proton Exchange Membrane Fuel Cell (PEMFC) is the most emerging fuel cell. Variation in input and load results in output variation of PEMFC. So, PI control technique is suggested to control the fuel cell output. This paper focuses on mathematical modelling of PEMFC and applying control technique to overcome the stated problem and demonstration through simulation using MATLAB and Simulink. KEYWORDS: PEMFC, MATLAB and Simulink, Renewable Energy Systems, PI Article History Received: 01 Dec 2021 | Revised: 06 Dec 2021 | Accepted: 08 Dec 2021 1. INTRODUCTION Safe, clean, low cost and reliable energy supply is essential requirement for Economic growth and development of human beings. In few years conventional energy sources like fossil fuels will be depleted which affects global economy. So renewable energy sources are gaining more concentration in power generation. One among them is the fuel cell, which is becoming more popular as they provide uninterruptible power supply throughout all the seasons. Benefits of hydrogen fuel cells are less noise and high-power quality. Fuel cell-based systems have clean and efficient energy conversions. The characteristics of fuel cells are “1) High energy density 2) zero gas emission 3) internal losses of a fuel cell is more for a low frequency ripple current4). Output of a fuel cell is around 0.7V5). The dynamic performance of a fuel cell is poor, for high output currents, with “dropping of output voltage and slow response” [5] [10]. Fuel cells are more suitable for vehicular applications as they provide high power density and less operating temperature [7]. Moreover because of more efficiency and less emission” fuel cells form agreeable selection for energy sources. Usage of Power electronics in fuel cell systems make possible to use fuel cell in many applications. Fuel cells are popularly known as the “microchip of the hydrogen age”. PEMFC is an electrochemical device which produces electricity by using oxygen and hydrogen as fuel. Converter transfers dc voltage properly from fuel cells to loads. PEMFC is estimated as important remedy for existing ecological issues, as it produces “almost zero emission, operate at low temperature and respond quickly as load changes [8]”. Because of “low noise, quick start up, robustness, high efficiency, low operating temperature PEMFC are suitable for stationary and transportation applications [1][6][9]. Because of low voltage output characteristic, there is a need of “high step-up DC-DC converter” in Fuel Cell based Energy System. Increase in load decreases the fuel cells output volta ge. International Journal of Electrical and Electronics Engineering (IJEEE) ISSN (P): 2278–9944; ISSN (E): 2278–9952 Vol. 10, Issue 2, Jul–Dec 2021; 15–20 © IASET