Actas de congresos
A Symmetrical Cascaded H-Bridge Multilevel Inverter Used as Shunt Active Power Filter for Ideal and Deteriorated Voltage Conditions
Fecha
2016-01-01Registro en:
2016 52nd Annual Meeting Of The Ieee Industry Applications Society (ias). New York: Ieee, 8 p., 2016.
0197-2618
WOS:000392509200046
Autor
Colorado Sch Mines
Universidade Federal de Santa Catarina (UFSC)
Petr Inst
Universidade Estadual Paulista (Unesp)
Institución
Resumen
This paper discusses the use of a Cascaded H-bridge Multilevel Inverter (CHMI) as shunt active power filter (SAPF) for selective disturbing currents compensation. The main feature of the proposed approach is the use of independent DC sources, with reduced DC-link voltages, which makes such a topology an ideal candidate for medium and high power applications with increased reliability. The developed control strategy regulates independent DC-link voltages in each H-bridge cell and allows selective compensation under a variety of voltage conditions without requiring any kind of reference-frame transformation. The selective compensation strategies are based on the decompositions proposed in the Conservative Power Theory (CPT), which result in several current-related terms associated with specific load characteristics. These current components are independent from each other and are used to define different compensation strategies, which can be selective in minimizing particular effects of disturbing loads. In order to validate the possibilities and performance of the proposed control strategies, a three-phase grid with unbalanced non-linear loading and negligible line impedance was simulated in PSIM considering ideal and deteriorated voltage conditions.