Browsing by Author "Rivas, D"

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    A simple control scheme for hybrid active power filter
    (INST ENGINEERING TECHNOLOGY-IET, 2002) Rivas, D; Moran, L; Dixon, J; Espinoza, J
    A simple control scheme for hybrid active power filters connected in parallel is presented and analysed. The hybrid active power filter combines the compensation characteristics of resonant passive and active power filters. The series active power filter is implemented with a three-phase pluse-width modular (PWM) voltage-source inverter. The proposed scheme is able to compensate displacement power factor and current harmonics simultaneously. The combination of passive and active power filters allows a better performance compensation of high-power nonlinear loads. The proposed control scheme is discussed in tenus of principles of operations under steady-state and transient conditions. The design and implementation of the power and control circuits are reported. Finally, key predicted results are verified experimentally on a 5 kVA prototype model.
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    Improving passive filter compensation performance with active techniques
    (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003) Rivas, D; Moran, L; Dixon, JW; Espinoza, JR
    This paper presents the performance analysis of a hybrid filter composed of passive and active filters connected in series. The analysis is done by evaluating the influence of passive filter parameters variations and the effects that different active power filter's gain have in the compensation performance of the hybrid scheme. The compensation performance is quantified by evaluating the attenuation factor in a power distribution system energizing high-power nonlinear loads compensated with passive filters and then improved with the connection of a series active power filter. Finally, compensation characteristics of the hybrid topology are tested on a 10-kVA experimental setup.