摘要：In this paper analysis comparative result of a supercapacitor based unified power quality
conditioner comparing with a fuel cell based unified power quality conditioner. This work
describes the unified power quality conditioner principles and power restoration for balanced or
unbalanced voltage sag or swells in a distribution system. This method proposes a typical
configuration of unified power quality conditioner that consists of a DC/DC converter supplied
by a supercapacitor at the DC link. This analysis used for comparing how the THD will be
improved and after injecting current and voltage to UPQC source current and source voltage
are sinusoidal. This paper explains the comparative results of UPQC showing performance wise
THD of supercapacitor and fuel cell, the harmonic distortion is reduced in fuel cell as compared
to supercapacitor. The comparative studies analyse in both the cases fuel cell is better than
supercapacitor in power quality parameters as THD and power factor etc. The result analysis
shows the THD of supercapacitor and fuel cell, the harmonic distortion is quite reduced in fuel
cell as compared to supercapacitor. The operation of the proposed system is modeled and
simulated in MATLAB environment using Simulink and Simpower System toolboxes.
关键词：Fuel cell; power quality; supercapacitor; unified power quality conditioner.
