The application of power semiconductor devices in the area of power electronics and power system are the key factors which kindle the power quality problems particularly the harmonics, burden of reactive power and neutral current due to unbalance. The above citied power quality problems are predominant due to wide usage of 1-φ / 3-φ , linear and nonlinear loads which are fed from three phase fo...

Abstract: In this paper, a new topology is developed for a three-phase four-wire (3P4W) distribution system utilizing a zig-zag transformer along with three-phase threewire (3P3W) Unified Power Quality Conditioner (UPQC).In this proposed topology the neutral point of the star connected transformer, used for the connection of series active power filter (APF) of 3P3W UPQC, is utilized as a fourth...

The article presents a new approach to positive and negative sequence current vector control of grid-connected three-phase three-wire power electronic converter operating under grid voltage imbalance conditions. concept utilizes the representation unbalanced in coordinates frame which components are constant. nonlinear trigonometric transformation two-dimensional from stationary is found online...

Inverters used as the interface for a distributed generator in a three-phase four-wire system sometimes operate with a large neutral current because of unbalanced loads and singlephase (possibly nonlinear) loads. Voltage balance within the dc-link of the inverter is important for proper operation of the inverter, and the neutral current is a significant disturbance to this. It is preferable to ...