The current switching ripple in a three-phase four-wire split-capacitor converter is analyzed this paper for all the four ac output wires relation to both balanced and unbalanced working conditions. Specifically, analytical formulations of peak-to-peak root mean square (RMS) ripples are originally evaluated as function modulation index, separately three phases neutral wire. Initially, single-ca...

Recent developments in power electronics technology have spurred interest in the use of renewable energy sources as distributed generation (DG) generators. The key component in DG generators is a grid-connected inverter that serves as an effective interface between the renewable energy source and the utility grid. The multifunctional inverter (MFI) is special type of grid-connected inverter tha...

In North America, Most power distribution systems employ a four-wire multi-grounded neutral (MGN) design. This paper has explained the inherent characteristics of multi-grounded three-phase four-wire distribution systems under unbalanced situations. As a result, the mechanism of voltage swell and voltage sag in MGN feeders becomes difficult to understand. The simulation tool that has been used ...

An optimal power flow algorithm for unbalanced three-phase distribution grids is presented in this paper as a new tool grid planning on low voltage level. As additional equipment like electric vehicles, heat pumps or solar systems can sometimes cause flows, existing algorithms have to be adapted. In comparison considering balanced the uses complete model of four-wire grid. Additionally, constra...

With the increasing applications of grid-connected voltage source converters, it is important to analyze impedance characteristic system implement stability analysis grid connection operation. Compared with three-phase three-wire system, an additional zero-sequence path exists in four-wire system. Therefore, necessary consider influence zero sequence when analyzing In this paper, model includin...

Compared with the three-phase, two-split-capacitor active power filter (3P2C-APF), the three-phase, four-leg active power filter (3P4L-APF) has been widely used in three-phase, four-wire grid utility for power quality control due to its numerous advantages, such as higher current output capability, particularly in phase N, lower current and easier voltage control on the DC-side. However, design...

DC bus imbalance in a split capacitor based rectifier or inverter system is a widely studied issue. In this paper the DC bus imbalance problem has been studied for a three phase four wire grid connected inverter where the midpoint of the split capacitor is connected to the neutral of grid. The problem has been analysed from common mode point of view and subsequently a low frequency common mode ...