Increasing the operating area of shunt active filters by advanced nonlinear control

摘要: This work is aimed to rigorously manage voltage saturation and maximum current constraints in Shunt Active Filters. In thisrespect, assuming “unconstrained” control algorithms have already been defined achieve standard objectives for such devices(i.e. tracking harmonic compensation DC-bus boundness), a plug-in unit, oriented extend the systemoperating region at same time preserving good performance under large transients overload conditions, presented.This solution allows improve availability, robustness composability of Filters, which are expected be keyfeatures present next generation complex possibly “smart” power grids. The proposed unit composed by two parts.First, suitable anti-windup strategy order deal with input saturation. Its main purpose preserve theoriginal “unconstrained error dynamics”, face saturation, while guaranteeing low computational burden reducedperformance impairment (the latter goal, context, leads rather non-standard problem formulation).To this aim, acts on references through suitably-designed additional dynamics. Then, copewith limitations, an has designed; again suitably shaped comply withthe features bounds system, augmented above-mentioned solution. scheme can besimply joined any kind unconstrained controller adopted steer work, Internal-Model-basedcurrent as benchmark case. approach validate extensive simulation tests.