Efficient operation results from a proper control strategy. In the operation and performance of a Proton Exchange Membrane Fuel Cell (PEMFC), the hydrogen gas flow rate is one of the most essential control parameter in addition to operating pressure, water management, temperature and humidity. This is because of the high cost and amount of energy are required to produce the purity hydrogen gas. In this paper, a Proportional Integral Derivative (PID) feedback control system is used to control the hydrogen flow rate. A strategy is adapted to balance the hydrogen use based on the loading requirements, especially during startups and sudden power demands. This system is implemented using National Instrument (NI) devices powered by the LabVIEW program. This is due to its simplicity and customization flexibility for measuring, processing and recording data. Designed structure allows the real-time implementation of a robust control law that is able to address the related nonlinearities and uncertainties without incurring a heavy computational load for the controller algorithm. While it facilitating a fast sampling rate according to the needs of the power system. Test results from the controller show that the new fuel control system provides good performance by reducing the amount of wasted hydrogen gas compared with that of the previous open loop system by 30 % to over 80 % saved by the varied load. This improvement is beneficial for any PEMFC that experiences fluctuating power demand, especially for vehicle applications.Keywords: PEM fuel cell, proportional integral derivative, reactant controller, LabVIEW, national instrument Abstrak Operasi yang cekap terhasil dari strategi kawalan yang baik. Dalam operasi dan prestasi Fuel Cell Membran Penukaran Proton (PEMFC), kadar aliran gas hidrogen adalah salah satu parameter kawalan yang paling penting selain dari tekanan operasi, pengurusan air, suhu dan kelembapan. Ini kerana kos yang tinggi dan jumlah tenaga dikehendaki untuk menghasilkan gas hidrogen berketulenan tinggi. Dalam kertas kerja ini, sistem kawalan Perkadaran, Kamiran dan Perbezaan (PID) suap balik digunakan untuk mengawal kadar aliran hidrogen. Strategi disesuaikan untuk mengimbangi penggunaan hidrogen berdasarkan keperluan bebanan, terutamanya pada permulaan dan permintaan kuasa secara tiba-tiba. Sistem ini dilaksanakan dengan menggunakan peranti instrumen nasional (NI) yang dikuasakan oleh program LabVIEW. Ini kerana ia ringkas dan fleksibel untuk mengukur, pemprosesan dan rakaman data. Struktur yang direka bentuk membolehkan pelaksanaan masa sebenar hukum kawalan yang mantap yang mampu menangani keadaan yang tidak linear dan tidak menentu tanpa memerlukan pengiraan yang sukar untuk algoritma pengawal. Sambil itu, ia memudahkan kadar pensampelan yang cepat mengikut keperluan sistem kuasa. Hasil ujian dari pengawal menunjukkan bahawa sistem kawalan sel fuel yang baru memberikan prestasi yang baik dengan ISSN -2506 Ros Emilia et al: STUDY OF HYDROGEN CONSUMPTION BY CONTROL SYSTEM IN PROTON EXCHANGE MEMB...