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AbsmccThis paper p m e n b the calculation methods for the difierent Rltering blocks ofa selective active Rlter in order to minimize the active filter inverter she, keeping the harmonic emissions at the limits stated by the applicable regulations. Since It may be neeerrary to comply with the regulations at a remote place with respect to the active filter loeation, the method has been extended to this case. In order to validate the simulations, measurements which were made at a real applicationand arc furnacewere used. Finally, the simulated results obtained with a remote hybrid filter were compared with those obtained when an active Alter is installed directly at the place where the barmonk emission regulations must be met. The comparison shows that remote mmpearation is an aiternative te be seriously considered. The results are simllsrto those obtained with localcompensation and the cost may be substantially lower.

This paper presents a controller for the DC voltages on the split capacitor topology for a four-wire selective active filter. A simple model for the dynamics of the two capacitor voltages is derived under the assumption of timescale separation between the dynamics of the inverter currents and the capacitor voltages. The controller proposed is based on physical principles and can be easily integrated with existing four-wire active filter controllers based on instantaneous reactive power (p-q) theory. Simulations and experimental results illustrate the benefits of the solution proposed.

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