Current Control and Active Damping for Single Phase LCL-Filtered Grid Connected Inverter

Figure 13

Closed loop poles’ map in the z-plane of the overall system when varying the LCL elements in range of their nominal values, where the red points are nominal places of the poles. (a) changed in range , (b) changed in range , (c) changed in range , and (d) , , and changed together each one in the range of its nominal value.

(a)

(b)

(c)

(d)