Article : [ART367]

Titre : A. Campos, G. Joos, P.D. Ziogas, J.F. Lindsay, Analysis and design of a series voltage unbalance compensator based on a three-phase VSI operating with unbalanced switching functions, IEEE Transactions on Power Electronics, Vol. 9, No. 3, May 1994, pp. 269-274.

Cité dans : [DIV367]  Les revues IEEE Transactions on Power Electronics, août 2013.

Source : Power Electronics, IEEE Transactions on
Pages : 269 - 274
Volume : 9
Issue : 3
Date : May 1994
ISSN : 0885-8993
Lien : private/CAMPOS1.pdf - 458 Ko, 6 pages.
References : 12
Info : INSPEC Accession Number: 4757164

Abstract :
Voltage unbalance in AC supply systems is typically corrected by
means of a shunt connected thyristor-controlled static VAr
compensator. This approach has the disadvantage of slow response,
harmonic injection into the AC system, and the requirement for large
passive components. The proposed system consists of a three-phase
PWM voltage source inverter, connected in series with the line
through a three-phase transformer. The unbalance compensation is
achieved by canceling the negative sequence component of the
line-to-line voltages of the source. It is also shown that by having
the inverter operate with unbalanced switching functions, it is
possible to balance the load voltage and to control the amplitude of
the positive sequence component in order to perform load voltage
regulation. A complete mathematical description of the method is
presented, demonstrating that the compensation can be achieved with
low kVA inverters and low harmonic injection. Implementation
procedures, design equations, and a design example are also included
in order to illustrate the proposed method. Experimental results of
a 1.5 kVA laboratory prototype system confirm the feasibility of the
technique

Index_Terms :
compensation invertors power system control pulse width
modulation switching circuits voltage control 1.5 kVA AC
supply systems force commutated converters line-to-line voltages
load voltage control low harmonic injection low kVA inverters
negative sequence component canceling positive sequence component
amplitude control series voltage unbalance compensator
three-phase PWM voltage source inverter three-phase VSI
three-phase transformer unbalanced switching functions

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