Power Flow in A Load-Current Sensorless Shunt Active Power Filter
ABSTRACT: In this paper, power
flow analysis of a three-phase four-wire system with a shunt active power
filter in steady state is presented. T he analysis begins with a mathematical
model of the power inverter and continues to find the relationship of the real
and imaginary power as well as zero sequence power in the grid, loads, and the
inverter (AC and DC sides) for successful compensation. T he system includes
mixed non-linear loads with significant unbalanced components. The filter consists
of a three-phase current-controlled voltage source inverter (CC-VSI) with a
filter inductance at the AC output and a DC-bus capacitor. T he CC-VSI is
operated to directly control the AC grid current to be sinusoidal and in phase
with the grid voltage. Computer simulation results verify the concept of the
filter and the power flow.
Author: Hanny H. Tumbelaka
Journal Code: jptlisetrogg070004
