Power quality mitigation by generalized unified power quality conditioner

Abstract

The network reconfiguring and compensating devices are the two different types of custom power solutions. The network reconfiguration devices consist of switchgear with current breaking, current restrict and current sending devices. The compensating device will compensate load by correcting power factor, unbalance etc. or supplied voltage quality will be improved. These devices are either connected in shunt (DSTATCOM) or in series (DVR) or a combination of both (UPQC) are the different types of custom power devices. This paper proposes compensating custom power device formed by the 3-phase, 3-level voltage source converters (VSC’s) connected one on another through a common dc link to three independent feeders distribution system, which is known as Generalised unified power quality conditioner (G-UPQC). Simulations are performed using MATLAB/SIMULINK package to mitigate current imperfections in first feeder which is connected with unbalanced and Non-linear load and voltage imperfections in the other two feeders which are connected with unbalanced and sensitive loads.