Control of Renewable Energy Integrated Universal Active Filter for Modern Distribution Systems

This work proposes a novel control technique for the control of universal active power filter with distribution generation capabilities (UAPF-DG). The proposed technique uses a complex filter to estimate the per phase active component of load current in a three phase system. The methodology uses complex filter to obtain fundamental balanced positive sequence component of distorted load current. This is used in reference generation of shunt active filter of UAPF-DG. This technique is inherently a three phase technique and involves lower computational burden The UAPF-DG system regulates the voltage of sensitive loads while simultaneously compensating the nonlinear load currents, thus achieving unity power at point of common coupling (PCC). The performance of the proposed system is validated on an experimental setup and tested for its response under conditions of load unbalance, voltage rise/dip and variation in solar irradiation.