Operation of Parallel Inverters in Microgrid Using New Adaptive PI Controllers Based on Least Mean Fourth Technique

Figure 4

Performance of regular PI controller compared to proposed controller along with parameters adaptation.

(a) Voltage profile at PCC for regular PI controller and proposed controller

(b) Zoom-in view for voltage curves in Figure 4(a)

(c) Adaption of controller weights (W1, W2) for d-axis current control loop

(d) Performance of current reference and feedback current for d-axis current control loop

(e) Performance of variable step size for d-axis current control loop