Loss Analysis in a Unified Shunt Active Filter Based on VSC and CSC (VCSC Scheme)

Authors

Faculty of Electrical and Computer Engineering, University of Semnan, Semnan, Iran

Abstract

Techno-economic performance indices of an active power filter are affected by power losses of the converters that are used in its structure. In this paper, the equations needed to calculate the losses in both conventional VSC and CSC based and also VCSC based filters which has been recently proposed in valuable references, are derived. Despite the significant advantages in a VCSC filter, there are always doubt and concern for the losses due to the use of two different converters. With this motivation, the losses are divided into four main sections including AC losses, DC losses, conducting and switching losses in semiconductors. These equations provide the possibility of relative comparison of losses between traditional filters and VCSC one. Simulation of various structures of active filter in a typical test system in MATLAB/SIMULINK environment shows that total losses in the proposed VCSC based filter is near to VSC based and much lower than CSC based one. This is on condition that the simultaneously use of two converters in a unified filter and with a same THD, increases the reliability and aggregates benefits of both conventional filters. Also, for validating the computations, power losses of filters are assessed in half of the nominal load power and for five switching frequencies.

Keywords

References

 
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TABRIZ JOURNAL OF ELECTRICAL ENGINEERING
Volume 48, Issue 4 - Serial Number 86
February 2018
Pages 1571-1582

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