Simulation and analysis of series voltage boost technology for power quality enhancement

Bus voltage sags may be one of the most visible power quality problems facing power engineers today. The use of a series transformer to boost bus voltage during sags is described. The emphasis in the paper is on the series voltage boost technology using pulse width modulation. The term 'series voltage booster' (SVB) is used in the paper to refer to this hardware. The electronic technology of the SVB is described and analyzed in its basic capabilities. Simulation of a boost device, and the transient response are discussed. Simulation is used to identify the required component ratings under a range of steady state and transient operating conditions. Key advantages and limitations of this technology are also discussed.