Multiconverter Unified Power-Quality Conditioning System: MC-UPQC

This paper presents a new unified power-quality conditioning system (MC-UPQC), capable of simultaneous compensation for voltage and current in multibus/multifeeder systems. In this configuration, one shunt voltage-source converter (shunt VSC) and two or more series VSCs exist. The system can be appl...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2009-07, Vol.24 (3), p.1679-1686
Main Authors: Mohammadi, H.R., Varjani, A.Y., Mokhtari, H.
Format: Article
Language:English
Subjects:
Active filters
Applied sciences
Bypasses
Capacitors
Compensation
Conditioning
Converters
Defects
Electrical engineering. Electrical power engineering
Electrical machines
Electrical power engineering
Exact sciences and technology
Feeders
Load flow
Miscellaneous
Operation. Load control. Reliability
Power conversion
Power electronics, power supplies
Power networks and lines
Power quality
Power quality (PQ)
Power transmission lines
PSCAD/EMTDC
Regulation and control
Shunts
Substations
unified power-quality conditioner (UPQC)
Voltage
Voltage control
Voltage fluctuations
voltage-source converter (VSC)
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Summary:This paper presents a new unified power-quality conditioning system (MC-UPQC), capable of simultaneous compensation for voltage and current in multibus/multifeeder systems. In this configuration, one shunt voltage-source converter (shunt VSC) and two or more series VSCs exist. The system can be applied to adjacent feeders to compensate for supply-voltage and load current imperfections on the main feeder and full compensation of supply-voltage imperfections on the other feeders. In the proposed configuration, all converters are connected back to back on the DC side and share a common DC-link capacitor. Therefore, power can be transferred from one feeder to adjacent feeders to compensate for sag/swell and interruption. The performance of the MC-UPQC as well as the adopted control algorithm is illustrated by simulation. The results obtained in PSCAD/EMTDC on a two-bus/two-feeder system show the effectiveness of the proposed configuration.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2009.2016822