Title :
Seamless Transfer Control Strategy for Fuel Cell Uninterruptible Power Supply System
Author :
Zhang, Wenping ; Xu, Dehong ; Li, Xiao ; Xie, Ren ; Li, Haijin ; Dong, Dezhi ; Sun, Chao ; Chen, Min
Author_Institution :
Dept. of Electr. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
Due to the long cold start time and slow dynamics of proton exchange membrane (PEM) fuel cell (FC) stack, operating modes transfer control strategy for fuel cell uninterruptible power supply (FC-UPS) is different from the traditional uninterruptible power supply (UPS) system. In this paper, a seamless transfer control strategy, which is suitable for FC-UPS, is proposed. The power conversion architecture of FC-UPS is presented with the characteristic analysis of PEMFC and the requirements of UPS. Then, the scheme of the seamless transfer control strategy is investigated. The proposed seamless transfer control strategy is not only capable of guaranteeing the uninterruptible load voltage, but also protecting FC against the power demands beyond its allowable bandwidth during the transition for long lifespan and safety. Finally, the control scheme has been verified on a 10-kW FC-UPS prototype.
Keywords :
power system control; proton exchange membrane fuel cells; uninterruptible power supplies; cold start time; power 10 kW; power conversion architecture; power demands; proton exchange membrane fuel cell; seamless transfer control strategy; slow dynamics; uninterruptible load voltage; uninterruptible power supply system; Batteries; DC-DC power converters; Inverters; Phasor measurement units; Switches; Uninterruptible power systems; Voltage control; Cold start; fuel cell (FC); power management unit (PMU); seamless transfer; uninterruptible power supply (UPS);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2012.2204777
