Performance comparison of VSC-based shunt and series compensators used for load voltage control in distribution systems

Gupta, Rajesh, Ghosh, Arindam, & Joshi, Avinash (2011) Performance comparison of VSC-based shunt and series compensators used for load voltage control in distribution systems. IEEE Transactions on Power Delivery, 26(1), pp. 268-278.

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In this paper, the performance of voltage-source converter-based shunt and series compensators used for load voltage control in electrical power distribution systems has been analyzed and compared, when a nonlinear load is connected across the load bus. The comparison has been made based on the closed-loop frequency resopnse characteristics of the compensated distribution system. A distribution static compensator (DSTATCOM) as a shunt device and a dynamic voltage restorer (DVR) as a series device are considered in the voltage-control mode for the comparison. The power-quality problems which these compensator address include voltage sags/swells, load voltage harmonic distortions, and unbalancing. The effect of various system parameters on the control performance of the compensator can be studied using the proposed analysis. In particular, the performance of the two compensators are compared with the strong ac supply (stiff source) and weak ac-supply (non-still source) distribution system. The experimental verification of the analytical results derived has been obtained using a laboratory model of the single-phase DSTATCOM and DVR. A generalized converter topology using a cascaded multilevel inverter has been proposed for the medium-voltage distribution system. Simulation studies have been performed in the PSCAD/EMTDC software to verify the results in the three-phase system.

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ID Code: 40766
Item Type: Journal Article
Refereed: Yes
Keywords: Distribution static compensator (DSTATCOM), Dynamic voltage restorer (DVR), Frequency-response characteristic, Load voltage control, Multilevel inverter, Nonlinear load
DOI: 10.1109/TPWRD.2010.2076341
ISSN: 0885-8977
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2011 IEEE
Copyright Statement: Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works
Deposited On: 16 Mar 2011 22:11
Last Modified: 02 Feb 2012 11:28

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