This manuscript proposes a novel approach for determining phase and neutral-current-ripple RMS in grid-connected four-leg inverters with the neutral inductor. The harmonic pollution is determined any arbitrary pulse width modulation (PWM) technique generic value of Thanks to proposed approach, it possible describe inductor parametric way respect inductors obtain wide range results, ranging from...

A robust methodology for obtaining the steady-state solution of the power grid is essential for reliable operation as well as planning of the future transmission and distribution grid. At present, disparate methods exist for steady-state analysis of the transmission (power flow) and distribution power grid (three-phase power flow). All existing alternating current (AC) power flow and three-phas...

This paper presents a hybrid active power filter for a three phase four wire distribution system. The scheme consists of a zigzag transformer, single phase active power filter connected in series with the utility neutral and a coupling capacitor connected in series with a voltage source converter of the active power filter (APF). The addition of coupling capacitor permits the reduction in DC li...

The increasing integration of distributed photovoltaics may further aggravate the over-voltage and three-phase unbalance issues low-voltage distribution networks with four-wire structures. voltage control method based on AC DC side power flow capability source converter in hybrid AC/DC is a solution for improvement above quality issues. In this paper, an accurately improved sensitivity matrix c...

Three fundamental sine-wave inverter topologies are analyzed: two-leg (one-phase, two-wire); three-leg (three-phase, three-wire); and four-leg (three-phase, four-wire). The topologies are “full-bridge” voltage-source inverters with LC filters suitable for producing sinusoidal output voltages. The switching states and corresponding output voltage vectors produced by each inverter are identified ...

This paper presents a dual active bridge DC/DC converter used as an AC current compensator in hybrid energy storage application. The the DC link appears when three-phase, four-wire inverter operates with unbalanced output currents—for example, trying to compensate for grid voltage unbalance. has adverse effects on operation of electrochemical storage, and it should be compensated. To achieve th...