Application of swarm optimisation-based modified algorithm for selective harmonic elimination in reduced switch count multilevel inverter

Multilevel inverters (MLIs) are nowadays extensively used in integration with renewable energy sources and in drives applications. The converter cost and voltage quality improvement are the utmost importance in such application of MLI. A six-switch seven-level reduced switch symmetrical MLI (6S-7L M...

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Veröffentlicht in:IET power electronics Jg. 11; H. 8; S. 1472 - 1482
Hauptverfasser: Panda, Kaibalya Prasad, Panda, Gayadhar
Format: Journal Article
Sprache:Englisch
Veröffentlicht: The Institution of Engineering and Technology 10.07.2018
Schlagworte:
active switches
driver circuit requirement
fifth‐order harmonics
harmonic distortion
harmonic elimination technique
harmonics suppression
invertors
network topology
optimal switching angles
particle swarm optimisation
power supply quality
PSO algorithm
reduced switch count multilevel inverter
renewable energy sources
Research Article
selective harmonic elimination
seven‐level reduced switch symmetrical MLI topology
swarm optimisation‐based modified algorithm
switching angles
switching convertors
voltage quality improvement
renewable energy sources
fifth-order harmonics
particle swarm optimisation
harmonic distortion
PSO algorithm
optimal switching angles
network topology
voltage quality improvement
switching convertors
power supply quality
driver circuit requirement
switching angles
invertors
reduced switch count multilevel inverter
selective harmonic elimination
harmonic elimination technique
swarm optimisation-based modified algorithm
seven-level reduced switch symmetrical MLI topology
active switches
harmonics suppression
ISSN:1755-4535, 1755-4543
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Beschreibung
Zusammenfassung:Multilevel inverters (MLIs) are nowadays extensively used in integration with renewable energy sources and in drives applications. The converter cost and voltage quality improvement are the utmost importance in such application of MLI. A six-switch seven-level reduced switch symmetrical MLI (6S-7L MLI) is proposed here. Compared to the conventional and similar existing MLI topologies, the proposed MLI uses less active switches and has less driver circuit requirement. A particle swarm optimisation (PSO)-based modified selected harmonic elimination technique is derived and analysed for computing optimal switching angles of proposed 6S-7L MLI to eliminate third- and fifth-order harmonics. Moreover, the performance of the proposed algorithm is compared with the two most commonly used PSO variants. The analysis shows the modified version of PSO is most suitable for optimising the output voltage of proposed MLI through targeted harmonic elimination. The proposed topology is investigated through simulation by applying the calculated switching angles using modified PSO algorithm. Finally, a single-phase experimental prototype is designed to verify the validity of the proposed structure.
ISSN:1755-4535
1755-4543
DOI:10.1049/iet-pel.2017.0697