TITLE:
Sizing of a Filter (L-C) for a 180° Control Inverter Connected to a Medium Voltage Network
AUTHORS:
Kouakou Fernand Koffi, Gondo Yake, Raymond Gbegbe, Georges Loum, Olivier Asseu
KEYWORDS:
filter (L-C), THD, inverter with 180° control and with SPWM control, mathematical iterations, MV., MATLAB-SIMULINK
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.11 No.5,
May
26,
2021
ABSTRACT: This paper studies the design and sizing of a filter (L-C) for an inverter with 180° control in Medium voltage (MV), based on formulas of the capacitance of the capacitor C and the inductance L of the filter (L-C) of an SPWM inverter. These formulas were obtained by minimizing two parameters: the reactive power of the capacitor (capped at 5% of the apparent power of the load) and the ripple of the current flowing through inductance L (capped at 10% of the current supplying the load). The application of these formulas for the calculation of the filter (L-C) of the 180°control inverter in MV is not conclusive. Studies have been carried out to make them applicable. The results show that limiting the current ripple in the inductor to 10% of the load current is a valid assumption and that limiting the reactive power of the capacitor to 5% of the apparent power of the load presents shortcomings. The results also show that setting the inductance L of the filter to Lmaxi and the capacitor C from 35 × Cmaxi to 400 × Cmaxi gives voltage and current THDs that meet the 519 IEEE-2014 standards.