Generally, current controlled voltage source inverters are
used to interface the intermittent RES in distributed system.
Recently, a few control strategies for grid connected inverters
incorporating PQ solution have been proposed. In [3] an inverter
operates as active inductor at a certain frequency to absorb
the harmonic current. But the exact calculation of network
inductance in real-time is difficult and may deteriorate the control
performance. A similar approach in which a shunt active
filter acts as active conductance to damp out the harmonics
in distribution network is proposed in [4]. In [5], a control
strategy for renewable interfacing inverter based on - theory
is proposed. In this strategy both load and inverter current
sensing is required to compensate the load current harmonics