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This paper describes the dynamics modelling of a practical and cost-effective DC/DC converter, DC/AC inverter and AC/DC rectifier for an uninterruptible power supply (UPS) system with backup proton exchange membrane fuel cell (PEMFC) and battery. Furthermore, a dynamics modelling and intelligent comprehensive controller for the PEMFC is designed according to the change of the load, while the energy...
This paper investigates practical cost-effective DC/DC converter, DC/AC inverter and AC/DC rectifier for an uninterruptible power supply (UPS) system with backup proton exchange membrane fuel cell (PEMFC). The developed power converters can supply high quality power with flexible conversion functions, leading to the establishment of reliable power management for UPS applications. A comprehensive control...
This paper presents the expert fault monitoring and intelligent comprehensive control of a proton exchange membrane (PEM) fuel cell (PEMFC) as backup power source for an uninterruptible power supply (UPS) system. The failure status can be shown on the screen of a micro-computer (or a PC) linked with the UPS through an RS-232 and on the control panel of the UPS through LED indicator lights. The proposed...
This paper, to improve the performance of a proton exchange membrane fuel cell (PEMFC) stack, avoid the hydrogen and oxygen/air starvation of electrochemical reaction and the performance deterioration of the stack, prevent the dehydration and drying of the membrane, keep the water content in the membrane, heighten the utilization of the gases, and track the output power of a hybrid uninterruptible...
In this paper, a 300 W boost active power factor corrector (PFC) for single-phase high frequency uninterrupted power supply (UPS) with universal input and fixed output voltages is analysed and then designed for backup and emergency power applications. The UPS is supplied by a backup proton exchange membrane fuel cell (PEMFC) and battery hybrid power source, in addition to the main source. The principle...
This paper presents the development of a proton exchange membrane fuel cell (PEMFC) and battery hybrid uninterruptible power system (UPS) for backup and emergency power applications. A sixty-cell PEMFC stack is employed as the main power source at normal load and a 3-cell lead-acid battery is employed as the auxiliary power of the UPS at overload or during the PEMFC startup. The PEMFC consists of...
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