Digital implementation of DS-SFH hybrid spread-spectrum modulation technique in three-phase voltage-source converter

Random Pulse Width modulation (RPWM) technique is being used presently for producing gate pulses for power electronic circuits such as rectifiers, inverters, and choppers. But in recent times, Direct-Sequence Slow-Frequency Hopping (DS-SFH) Hybrid Spread-Spectrum modulation technique has been employ...

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Bibliographic Details
Published in:Electrical engineering 2022-06, Vol.104 (3), p.1413-1423
Main Authors: Alavanthan, Rajalakshmi, Kavitha, A.
Format: Article
Language:English
Subjects:
Circuits
Communications systems
Converters
Economics and Management
Electric potential
Electrical Engineering
Electrical Machines and Networks
Electronic circuits
Energy Policy
Engineering
Field programmable gate arrays
Harmonic distortion
Military communications
Original Paper
Power Electronics
Power factor
Pulse duration modulation
Slow frequency hopping
Spread spectrum
Voltage
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Summary:Random Pulse Width modulation (RPWM) technique is being used presently for producing gate pulses for power electronic circuits such as rectifiers, inverters, and choppers. But in recent times, Direct-Sequence Slow-Frequency Hopping (DS-SFH) Hybrid Spread-Spectrum modulation technique has been employed in military communication systems since it combines the advantages of two different modulation techniques, namely Direct Spread Spectrum Modulation and Frequency Hopping Spread Spectrum Modulation. This hybrid technique is now proposed for the first time, for the suppression of EMI and improvement of power quality in three-phase grid-connected bidirectional Voltage Source Converters. This digital modulation technique is implemented through a compact low-cost SPARTAN Field Programmable Gate Array by developing a suitable VHDL coding for producing the required switching pulses for the converter. A comparative analysis is also presented between the proposed DS-SFH hybrid modulation and the RPWM. It is shown that the implementation of DS-SFH results in reduced EMI, decreased Total Harmonic Distortion, and power factor is also improved significantly.
ISSN:0948-7921
1432-0487
DOI:10.1007/s00202-021-01388-1