**Table 1.**

*Line impedance emulator parameters.*

**7. Experimental validation**

*DOI: http://dx.doi.org/10.5772/intechopen.90081*

**Figure 21.**

**Figure 22.**

**Figure 23.**

**143**

*Experimental test bench.*

*Experimental prototype.*

**Figures 22** and **23** show the experimental prototype and the test bench for the line impedance emulator. It includes (1) an auto transformer used in order to vary the voltage peak magnitude; (2) an L filter (composed of three inductors (20 mH/20A)

*Line Impedance Emulator: Modeling, Control Design, Simulation and Experimental Validation*

*System output for real and programmed impedance for X = 1.5 Ω and R = 1 Ω.*

**Figure 18.**

*Vdc response to a step reference of 100 V.*

**Figure 19.** *Line impedance emulator output in case of voltage reference magnitude change.*

**Figure 20.** *Simulation control scenario.*

*Line Impedance Emulator: Modeling, Control Design, Simulation and Experimental Validation DOI: http://dx.doi.org/10.5772/intechopen.90081*

**Figure 21.** *System output for real and programmed impedance for X = 1.5 Ω and R = 1 Ω.*
